imgui: update imgui to v1.92.7, update dx9 backend to latest (#605)

2026-08-01 22:30:42 -07:00 · 2026-04-03 01:51:08 -07:00
parent 5af3e0d494
commit 1ad6a9412e
17 changed files with 13949 additions and 7546 deletions
@@ -1,6 +1,6 @@
 The MIT License (MIT)
-Copyright (c) 2014-2023 Omar Cornut
+Copyright (c) 2014-2026 Omar Cornut
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -1,16 +1,37 @@
-// dear imgui: Renderer for DirectX9
+// dear imgui: Renderer Backend for DirectX9
-// This needs to be used along with a Platform Binding (e.g. Win32)
+// This needs to be used along with a Platform Backend (e.g. Win32)
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
-//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+//  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
 //  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: IMGUI_USE_BGRA_PACKED_COLOR support, as this is the optimal color encoding for DirectX9.
 //  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
-// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
-// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
-// https://github.com/ocornut/imgui
+// Learn about Dear ImGui:
 // - FAQ                  https://dearimgui.com/faq
 // - Getting Started      https://dearimgui.com/getting-started
 // - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
 // - Introduction, links and more at the top of imgui.cpp
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2026-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2026-03-19: Fixed issue in ImGui_ImplDX9_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295, #9310)
 //  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
 //  2025-06-11: DirectX9: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas.
 //  2024-10-07: DirectX9: Changed default texture sampler to Clamp instead of Repeat/Wrap.
 //  2024-02-12: DirectX9: Using RGBA format when supported by the driver to avoid CPU side conversion. (#6575)
 //  2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
 //  2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
 //  2021-06-25: DirectX9: Explicitly disable texture state stages after >= 1.
 //  2021-05-19: DirectX9: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement)
 //  2021-04-23: DirectX9: Explicitly setting up more graphics states to increase compatibility with unusual non-default states.
 //  2021-03-18: DirectX9: Calling IDirect3DStateBlock9::Capture() after CreateStateBlock() as a workaround for state restoring issues (see #3857).
 //  2021-03-03: DirectX9: Added support for IMGUI_USE_BGRA_PACKED_COLOR in user's imconfig file.
 //  2021-02-18: DirectX9: Change blending equation to preserve alpha in output buffer.
 //  2019-05-29: DirectX9: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
 //  2019-04-30: DirectX9: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
 //  2019-03-29: Misc: Fixed erroneous assert in ImGui_ImplDX9_InvalidateDeviceObjects().
@@ -22,160 +43,154 @@
 //  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplDX9_RenderDrawData() in the .h file so you can call it yourself.
 //  2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
 #include "imgui_impl_dx9.h"
 #include <algorithm>
 // DirectX
 #include <d3d9.h>
 #include "imgui.h"
 #ifndef IMGUI_DISABLE
 #include "imgui_impl_dx9.h"
 // allow std::min use
 #ifdef min
 #undef min
 #endif
-// DirectX data
+// DirectX
-static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
+#include <d3d9.h>
 static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL;
 static LPDIRECT3DINDEXBUFFER9 g_pIB = NULL;
 static LPDIRECT3DTEXTURE9 g_FontTexture = NULL;
 static int g_VertexBufferSize = 5000, g_IndexBufferSize = 10000;
 // Clang/GCC warnings with -Weverything
 #if defined(__clang__)
 #pragma clang diagnostic ignored "-Wold-style-cast"         // warning: use of old-style cast                            // yes, they are more terse.
 #pragma clang diagnostic ignored "-Wsign-conversion"        // warning: implicit conversion changes signedness
 #endif
 // DirectX data
 struct ImGui_ImplDX9_Data
 {
    LPDIRECT3DDEVICE9           pd3dDevice;
    LPDIRECT3DVERTEXBUFFER9     pVB;
    LPDIRECT3DINDEXBUFFER9      pIB;
    int                         VertexBufferSize;
    int                         IndexBufferSize;
    bool                        HasRgbaSupport;
    ImGui_ImplDX9_Data()        { memset((void*)this, 0, sizeof(*this)); VertexBufferSize = 5000; IndexBufferSize = 10000; }
 };
 struct CUSTOMVERTEX
 {
    float    pos[3];
    D3DCOLOR col;
    float    uv[2];
 };
 #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE|D3DFVF_TEX1)
-// Render function.
+#ifdef IMGUI_USE_BGRA_PACKED_COLOR
-// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
+#define IMGUI_COL_TO_DX9_ARGB(_COL)     (_COL)
-void ImGui_ImplDX9_RenderDrawData(ImDrawData *draw_data) {
+#else
 #define IMGUI_COL_TO_DX9_ARGB(_COL)     (((_COL) & 0xFF00FF00) | (((_COL) & 0xFF0000) >> 16) | (((_COL) & 0xFF) << 16))
 #endif
-    // Avoid rendering when minimized
+// Backend data stored in io.BackendRendererUserData to allow support for multiple Dear ImGui contexts
-    if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
+// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
-        return;
+static ImGui_ImplDX9_Data* ImGui_ImplDX9_GetBackendData()
 {
    return ImGui::GetCurrentContext() ? (ImGui_ImplDX9_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
 }
-    // Create and grow buffers if needed
+// Forward Declarations
-    if (!g_pVB || g_VertexBufferSize < draw_data->TotalVtxCount) {
+static void ImGui_ImplDX9_InitMultiViewportSupport();
-        if (g_pVB) {
+static void ImGui_ImplDX9_ShutdownMultiViewportSupport();
-            g_pVB->Release();
+static void ImGui_ImplDX9_CreateDeviceObjectsForPlatformWindows();
-            g_pVB = NULL;
+static void ImGui_ImplDX9_InvalidateDeviceObjectsForPlatformWindows();
        }
        g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
        if (g_pd3dDevice->CreateVertexBuffer(g_VertexBufferSize * sizeof(ImDrawVert),
                                             D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX,
                                             D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
            return;
    }
    if (!g_pIB || g_IndexBufferSize < draw_data->TotalIdxCount) {
        if (g_pIB) {
            g_pIB->Release();
            g_pIB = NULL;
        }
        g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
        if (g_pd3dDevice->CreateIndexBuffer(g_IndexBufferSize * sizeof(ImDrawIdx),
                                            D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY,
                                            sizeof(ImDrawIdx) == 2 ? D3DFMT_INDEX16 : D3DFMT_INDEX32,
                                            D3DPOOL_DEFAULT, &g_pIB, NULL) < 0)
            return;
    }
-    // Backup the DX9 state
+struct render_state_t {
-    IDirect3DStateBlock9 *d3d9_state_block = NULL;
+    IDirect3DSurface9 *back_buffer;
-    if (g_pd3dDevice->CreateStateBlock(D3DSBT_ALL, &d3d9_state_block) < 0)
+    IDirect3DSurface9 *depth_stencil;
-        return;
+    IDirect3DSurface9 *render_targets[8];
    D3DCAPS9 caps;
 };
-    // Backup the DX9 transform (DX9 documentation suggests that it is included in the StateBlock but it doesn't appear to)
+// Functions
-    D3DMATRIX last_world, last_view, last_projection;
+static void ImGui_ImplDX9_SetupRenderState(ImDrawData* draw_data, struct render_state_t *render_state)
-    g_pd3dDevice->GetTransform(D3DTS_WORLD, &last_world);
+{
-    g_pd3dDevice->GetTransform(D3DTS_VIEW, &last_view);
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    g_pd3dDevice->GetTransform(D3DTS_PROJECTION, &last_projection);
    // Copy all vertices into a single contiguous buffer
    ImDrawVert *vtx_dst;
    ImDrawIdx *idx_dst;
    if (g_pVB->Lock(0, (UINT) (draw_data->TotalVtxCount * sizeof(ImDrawVert)), (void **) &vtx_dst,
                    D3DLOCK_DISCARD) < 0)
        return;
    if (g_pIB->Lock(0, (UINT) (draw_data->TotalIdxCount * sizeof(ImDrawIdx)), (void **) &idx_dst,
                    D3DLOCK_DISCARD) < 0)
        return;
    for (int n = 0; n < draw_data->CmdListsCount; n++) {
        const ImDrawList *cmd_list = draw_data->CmdLists[n];
        memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
        vtx_dst += cmd_list->VtxBuffer.Size;
        idx_dst += cmd_list->IdxBuffer.Size;
    }
    g_pVB->Unlock();
    g_pIB->Unlock();
    g_pd3dDevice->SetStreamSource(0, g_pVB, 0, sizeof(ImDrawVert));
    g_pd3dDevice->SetIndices(g_pIB);
    g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
    // Setup viewport
    D3DVIEWPORT9 vp;
    vp.X = vp.Y = 0;
-    vp.Width = (DWORD) draw_data->DisplaySize.x;
+    vp.Width = (DWORD)draw_data->DisplaySize.x;
-    vp.Height = (DWORD) draw_data->DisplaySize.y;
+    vp.Height = (DWORD)draw_data->DisplaySize.y;
    vp.MinZ = 0.0f;
    vp.MaxZ = 1.0f;
    g_pd3dDevice->SetViewport(&vp);
-    g_pd3dDevice->SetPixelShader(nullptr);
+    LPDIRECT3DDEVICE9 device = bd->pd3dDevice;
-    g_pd3dDevice->SetVertexShader(nullptr);
+    device->SetViewport(&vp);
-    D3DCAPS9 caps {};
+    // spice ldj
-    if (FAILED(g_pd3dDevice->GetDeviceCaps(&caps))) {
+    {
-        caps.NumSimultaneousRTs = 0UL;
+        if (FAILED(device->GetDeviceCaps(&render_state->caps))) {
-    }
+            render_state->caps.NumSimultaneousRTs = 0UL;
        }
-    IDirect3DSurface9 *back_buffer = nullptr;
+        // save all previous render target state
-    IDirect3DSurface9 *depth_stencil = nullptr;
+        for (size_t target = 0; target < std::min(8UL, render_state->caps.NumSimultaneousRTs); target++) {
-    IDirect3DSurface9 *render_targets[8];
+            if (FAILED(device->GetRenderTarget(target, &render_state->render_targets[target]))) {
                render_state->render_targets[target] = nullptr;
            }
        }
-    // save all previous render target state
+        // get the previous depth stencil
-    for (size_t target = 0; target < std::min(8UL, caps.NumSimultaneousRTs); target++) {
+        if (FAILED(device->GetDepthStencilSurface(&render_state->depth_stencil))) {
-        if (FAILED(g_pd3dDevice->GetRenderTarget(target, &render_targets[target]))) {
+            render_state->depth_stencil = nullptr;
-            render_targets[target] = nullptr;
+        }
        // set the back buffer as the current render target
        if (SUCCEEDED(device->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &render_state->back_buffer))) {
            device->SetRenderTarget(0, render_state->back_buffer);
            device->SetDepthStencilSurface(nullptr);
            for (size_t target = 1; target < std::min(8UL, render_state->caps.NumSimultaneousRTs); target++) {
                device->SetRenderTarget(target, nullptr);
            }
        } else {
            render_state->back_buffer = nullptr;
        }
    }
-    // get the previous depth stencil
+    // Setup render state: fixed-pipeline, alpha-blending, no face culling, no depth testing, shade mode (for gradient), bilinear sampling.
-    if (FAILED(g_pd3dDevice->GetDepthStencilSurface(&depth_stencil))) {
+    device->SetPixelShader(nullptr);
-        depth_stencil = nullptr;
+    device->SetVertexShader(nullptr);
-    }
+    device->SetRenderState(D3DRS_FILLMODE, D3DFILL_SOLID);
-
+    device->SetRenderState(D3DRS_SHADEMODE, D3DSHADE_GOURAUD);
-    // set the back buffer as the current render target
+    device->SetRenderState(D3DRS_ZWRITEENABLE, FALSE);
-    if (SUCCEEDED(g_pd3dDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &back_buffer))) {
+    device->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);
-        g_pd3dDevice->SetRenderTarget(0, back_buffer);
+    device->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
-        g_pd3dDevice->SetDepthStencilSurface(nullptr);
+    device->SetRenderState(D3DRS_ZENABLE, FALSE);
-
+    device->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
-        for (size_t target = 1; target < std::min(8UL, caps.NumSimultaneousRTs); target++) {
+    device->SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD);
-            g_pd3dDevice->SetRenderTarget(target, nullptr);
+    device->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
-        }
+    device->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
-    } else {
+    device->SetRenderState(D3DRS_SEPARATEALPHABLENDENABLE, TRUE);
-        back_buffer = nullptr;
+    device->SetRenderState(D3DRS_SRCBLENDALPHA, D3DBLEND_ONE);
-    }
+    device->SetRenderState(D3DRS_DESTBLENDALPHA, D3DBLEND_INVSRCALPHA);
-
+    device->SetRenderState(D3DRS_SCISSORTESTENABLE, TRUE);
-    // Setup render state: fixed-pipeline, alpha-blending, no face culling, no depth testing, shade mode (for gradient)
+    device->SetRenderState(D3DRS_FOGENABLE, FALSE);
-    g_pd3dDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
+    device->SetRenderState(D3DRS_RANGEFOGENABLE, FALSE);
-    g_pd3dDevice->SetRenderState(D3DRS_LIGHTING, false);
+    device->SetRenderState(D3DRS_SPECULARENABLE, FALSE);
-    g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
+    device->SetRenderState(D3DRS_STENCILENABLE, FALSE);
-    g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, true);
+    device->SetRenderState(D3DRS_CLIPPING, TRUE);
-    g_pd3dDevice->SetRenderState(D3DRS_ALPHATESTENABLE, false);
+    device->SetRenderState(D3DRS_LIGHTING, FALSE);
-    g_pd3dDevice->SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD);
+    device->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
-    g_pd3dDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
+    device->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
-    g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
+    device->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);
-    g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, true);
+    device->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);
-    g_pd3dDevice->SetRenderState(D3DRS_SHADEMODE, D3DSHADE_GOURAUD);
+    device->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
-    g_pd3dDevice->SetRenderState(D3DRS_FOGENABLE, false);
+    device->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE);
-    g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
+    device->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);
-    g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
+    device->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_DISABLE);
-    g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);
+    device->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
-    g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);
+    device->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
-    g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
+    device->SetSamplerState(0, D3DSAMP_ADDRESSU, D3DTADDRESS_CLAMP);
-    g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE);
+    device->SetSamplerState(0, D3DSAMP_ADDRESSV, D3DTADDRESS_CLAMP);
    g_pd3dDevice->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
    g_pd3dDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
    // Setup orthographic projection matrix
    // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
@@ -185,176 +200,537 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData *draw_data) {
        float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x + 0.5f;
        float T = draw_data->DisplayPos.y + 0.5f;
        float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y + 0.5f;
-        D3DMATRIX mat_identity = {{{1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f}}};
+        D3DMATRIX mat_identity = { { { 1.0f, 0.0f, 0.0f, 0.0f,  0.0f, 1.0f, 0.0f, 0.0f,  0.0f, 0.0f, 1.0f, 0.0f,  0.0f, 0.0f, 0.0f, 1.0f } } };
        D3DMATRIX mat_projection =
-                {{{
+        { { {
-                          2.0f / (R - L), 0.0f, 0.0f, 0.0f,
+            2.0f/(R-L),   0.0f,         0.0f,  0.0f,
-                          0.0f, 2.0f / (T - B), 0.0f, 0.0f,
+            0.0f,         2.0f/(T-B),   0.0f,  0.0f,
-                          0.0f, 0.0f, 0.5f, 0.0f,
+            0.0f,         0.0f,         0.5f,  0.0f,
-                          (L + R) / (L - R), (T + B) / (B - T), 0.5f, 1.0f
+            (L+R)/(L-R),  (T+B)/(B-T),  0.5f,  1.0f
-                  }}};
+        } } };
-        g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat_identity);
+        device->SetTransform(D3DTS_WORLD, &mat_identity);
-        g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat_identity);
+        device->SetTransform(D3DTS_VIEW, &mat_identity);
-        g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat_projection);
+        device->SetTransform(D3DTS_PROJECTION, &mat_projection);
    }
 }
 // Render function.
 void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
 {
    // Avoid rendering when minimized
    if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
        return;
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    LPDIRECT3DDEVICE9 device = bd->pd3dDevice;
    // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
    // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
    if (draw_data->Textures != nullptr)
        for (ImTextureData* tex : *draw_data->Textures)
            if (tex->Status != ImTextureStatus_OK)
                ImGui_ImplDX9_UpdateTexture(tex);
    // Create and grow buffers if needed
    if (!bd->pVB || bd->VertexBufferSize < draw_data->TotalVtxCount)
    {
        if (bd->pVB) { bd->pVB->Release(); bd->pVB = nullptr; }
        bd->VertexBufferSize = draw_data->TotalVtxCount + 5000;
        if (device->CreateVertexBuffer(bd->VertexBufferSize * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &bd->pVB, nullptr) < 0)
            return;
    }
    if (!bd->pIB || bd->IndexBufferSize < draw_data->TotalIdxCount)
    {
        if (bd->pIB) { bd->pIB->Release(); bd->pIB = nullptr; }
        bd->IndexBufferSize = draw_data->TotalIdxCount + 10000;
        if (device->CreateIndexBuffer(bd->IndexBufferSize * sizeof(ImDrawIdx), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, sizeof(ImDrawIdx) == 2 ? D3DFMT_INDEX16 : D3DFMT_INDEX32, D3DPOOL_DEFAULT, &bd->pIB, nullptr) < 0)
            return;
    }
    // Backup the DX9 state
    IDirect3DStateBlock9* state_block = nullptr;
    if (device->CreateStateBlock(D3DSBT_ALL, &state_block) < 0)
        return;
    if (state_block->Capture() < 0)
    {
        state_block->Release();
        return;
    }
    // Backup the DX9 transform (DX9 documentation suggests that it is included in the StateBlock but it doesn't appear to)
    D3DMATRIX last_world, last_view, last_projection;
    device->GetTransform(D3DTS_WORLD, &last_world);
    device->GetTransform(D3DTS_VIEW, &last_view);
    device->GetTransform(D3DTS_PROJECTION, &last_projection);
    // Allocate buffers
    CUSTOMVERTEX* vtx_dst;
    ImDrawIdx* idx_dst;
    if (bd->pVB->Lock(0, (UINT)(draw_data->TotalVtxCount * sizeof(CUSTOMVERTEX)), (void**)&vtx_dst, D3DLOCK_DISCARD) < 0)
    {
        state_block->Release();
        return;
    }
    if (bd->pIB->Lock(0, (UINT)(draw_data->TotalIdxCount * sizeof(ImDrawIdx)), (void**)&idx_dst, D3DLOCK_DISCARD) < 0)
    {
        bd->pVB->Unlock();
        state_block->Release();
        return;
    }
    // Copy and convert all vertices into a single contiguous buffer, convert colors to DX9 default format.
    // FIXME-OPT: This is a minor waste of resource, the ideal is to use imconfig.h and
    //  1) to avoid repacking colors:   #define IMGUI_USE_BGRA_PACKED_COLOR
    //  2) to avoid repacking vertices: #define IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT struct ImDrawVert { ImVec2 pos; float z; ImU32 col; ImVec2 uv; }
    for (const ImDrawList* draw_list : draw_data->CmdLists)
    {
        const ImDrawVert* vtx_src = draw_list->VtxBuffer.Data;
        for (int i = 0; i < draw_list->VtxBuffer.Size; i++)
        {
            vtx_dst->pos[0] = vtx_src->pos.x;
            vtx_dst->pos[1] = vtx_src->pos.y;
            vtx_dst->pos[2] = 0.0f;
            vtx_dst->col = IMGUI_COL_TO_DX9_ARGB(vtx_src->col);
            vtx_dst->uv[0] = vtx_src->uv.x;
            vtx_dst->uv[1] = vtx_src->uv.y;
            vtx_dst++;
            vtx_src++;
        }
        memcpy(idx_dst, draw_list->IdxBuffer.Data, draw_list->IdxBuffer.Size * sizeof(ImDrawIdx));
        idx_dst += draw_list->IdxBuffer.Size;
    }
    bd->pVB->Unlock();
    bd->pIB->Unlock();
    device->SetStreamSource(0, bd->pVB, 0, sizeof(CUSTOMVERTEX));
    device->SetIndices(bd->pIB);
    device->SetFVF(D3DFVF_CUSTOMVERTEX);
    // Setup desired DX state
    struct render_state_t render_state = {};
    ImGui_ImplDX9_SetupRenderState(draw_data, &render_state);
    // Render command lists
    // (Because we merged all buffers into a single one, we maintain our own offset into them)
    int global_vtx_offset = 0;
    int global_idx_offset = 0;
    ImVec2 clip_off = draw_data->DisplayPos;
-    for (int n = 0; n < draw_data->CmdListsCount; n++) {
+    for (const ImDrawList* draw_list : draw_data->CmdLists)
-        const ImDrawList *cmd_list = draw_data->CmdLists[n];
+    {
-        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++) {
+        for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
-            const ImDrawCmd *pcmd = &cmd_list->CmdBuffer[cmd_i];
+        {
-            if (pcmd->UserCallback != NULL) {
+            const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
-                pcmd->UserCallback(cmd_list, pcmd);
+            if (pcmd->UserCallback != nullptr)
-            } else {
+            {
-                const RECT r = {(LONG) (pcmd->ClipRect.x - clip_off.x), (LONG) (pcmd->ClipRect.y - clip_off.y),
+                // User callback, registered via ImDrawList::AddCallback()
-                                (LONG) (pcmd->ClipRect.z - clip_off.x), (LONG) (pcmd->ClipRect.w - clip_off.y)};
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
-                auto texture = reinterpret_cast<IDirect3DBaseTexture9 *>(pcmd->TextureId);
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
-                g_pd3dDevice->SetTexture(0, texture);
+                    ImGui_ImplDX9_SetupRenderState(draw_data, &render_state);
-                g_pd3dDevice->SetScissorRect(&r);
+                else
-                g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST,
+                    pcmd->UserCallback(draw_list, pcmd);
-                                                   pcmd->VtxOffset + global_vtx_offset, 0,
+            }
-                                                   (UINT) cmd_list->VtxBuffer.Size,
+            else
-                                                   pcmd->IdxOffset + global_idx_offset, pcmd->ElemCount / 3);
+            {
                // Project scissor/clipping rectangles into framebuffer space
                ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y);
                ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y);
                if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
                    continue;
                // Apply scissor/clipping rectangle
                const RECT r = { (LONG)clip_min.x, (LONG)clip_min.y, (LONG)clip_max.x, (LONG)clip_max.y };
                device->SetScissorRect(&r);
                // Bind texture, Draw
                const LPDIRECT3DTEXTURE9 texture = (LPDIRECT3DTEXTURE9)pcmd->GetTexID();
                device->SetTexture(0, texture);
                device->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, pcmd->VtxOffset + global_vtx_offset, 0, (UINT)draw_list->VtxBuffer.Size, pcmd->IdxOffset + global_idx_offset, pcmd->ElemCount / 3);
            }
        }
-        global_idx_offset += cmd_list->IdxBuffer.Size;
+        global_idx_offset += draw_list->IdxBuffer.Size;
-        global_vtx_offset += cmd_list->VtxBuffer.Size;
+        global_vtx_offset += draw_list->VtxBuffer.Size;
    }
-    if (back_buffer) {
+    // When using multi-viewports, it appears that there's an odd logic in DirectX9 which prevent subsequent windows
-        back_buffer->Release();
+    // from rendering until the first window submits at least one draw call, even once. That's our workaround. (see #2560)
-        back_buffer = nullptr;
+    if (global_vtx_offset == 0)
-    }
+        bd->pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, 0, 0, 0);
-    // restore previous depth stencil
+    // spice ldj
-    if (depth_stencil) {
+    {
-        g_pd3dDevice->SetDepthStencilSurface(depth_stencil);
+        if (render_state.back_buffer) {
-        depth_stencil->Release();
+            render_state.back_buffer->Release();
-        depth_stencil = nullptr;
+            render_state.back_buffer = nullptr;
-    }
+        }
        // restore previous depth stencil
        if (render_state.depth_stencil) {
            device->SetDepthStencilSurface(render_state.depth_stencil);
            render_state.depth_stencil->Release();
            render_state.depth_stencil = nullptr;
        }
        // restore all render target state
        for (size_t target = 0; target < std::min(8UL, render_state.caps.NumSimultaneousRTs); target++) {
            auto render_target = render_state.render_targets[target];
-    // restore all render target state
+            if (render_target) {
-    for (size_t target = 0; target < std::min(8UL, caps.NumSimultaneousRTs); target++) {
+                device->SetRenderTarget(target, render_target);
-        auto render_target = render_targets[target];
+                render_target->Release();
-
+            }
        if (render_target) {
            g_pd3dDevice->SetRenderTarget(target, render_target);
            render_target->Release();
        }
    }
-    // restore the DX9 transform
+    // Restore the DX9 transform
-    g_pd3dDevice->SetTransform(D3DTS_WORLD, &last_world);
+    device->SetTransform(D3DTS_WORLD, &last_world);
-    g_pd3dDevice->SetTransform(D3DTS_VIEW, &last_view);
+    device->SetTransform(D3DTS_VIEW, &last_view);
-    g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &last_projection);
+    device->SetTransform(D3DTS_PROJECTION, &last_projection);
-    // restore the DX9 state
+    // Restore the DX9 state
-    d3d9_state_block->Apply();
+    state_block->Apply();
-    d3d9_state_block->Release();
+    state_block->Release();
 }
-bool ImGui_ImplDX9_Init(IDirect3DDevice9 *device) {
+static bool ImGui_ImplDX9_CheckFormatSupport(LPDIRECT3DDEVICE9 pDevice, D3DFORMAT format)
 {
    LPDIRECT3D9 pd3d = nullptr;
    if (pDevice->GetDirect3D(&pd3d) != D3D_OK)
        return false;
    D3DDEVICE_CREATION_PARAMETERS param = {};
    D3DDISPLAYMODE mode = {};
    if (pDevice->GetCreationParameters(&param) != D3D_OK || pDevice->GetDisplayMode(0, &mode) != D3D_OK)
    {
        pd3d->Release();
        return false;
    }
    // Font texture should support linear filter, color blend and write to render-target
    bool support = (pd3d->CheckDeviceFormat(param.AdapterOrdinal, param.DeviceType, mode.Format, D3DUSAGE_DYNAMIC | D3DUSAGE_QUERY_FILTER | D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING, D3DRTYPE_TEXTURE, format)) == D3D_OK;
    pd3d->Release();
    return support;
 }
-    // Setup back-end capabilities flags
+bool ImGui_ImplDX9_Init(IDirect3DDevice9* device)
-    auto &io = ImGui::GetIO();
+{
    ImGuiIO& io = ImGui::GetIO();
    IMGUI_CHECKVERSION();
    IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
    // Setup backend capabilities flags
    ImGui_ImplDX9_Data* bd = IM_NEW(ImGui_ImplDX9_Data)();
    io.BackendRendererUserData = (void*)bd;
    io.BackendRendererName = "imgui_impl_dx9";
    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
    io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;   // We can honor ImGuiPlatformIO::Textures[] requests during render.
    io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports;  // We can create multi-viewports on the Renderer side (optional)
-    // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
-    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;
+    platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = 4096;
    bd->pd3dDevice = device;
    bd->pd3dDevice->AddRef();
    bd->HasRgbaSupport = ImGui_ImplDX9_CheckFormatSupport(bd->pd3dDevice, D3DFMT_A8B8G8R8);
    ImGui_ImplDX9_InitMultiViewportSupport();
    g_pd3dDevice = device;
    g_pd3dDevice->AddRef();
    return true;
 }
-void ImGui_ImplDX9_Shutdown() {
+void ImGui_ImplDX9_Shutdown()
 {
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
    ImGuiIO& io = ImGui::GetIO();
    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
    ImGui_ImplDX9_ShutdownMultiViewportSupport();
    ImGui_ImplDX9_InvalidateDeviceObjects();
    if (bd->pd3dDevice) { bd->pd3dDevice->Release(); }
-    if (g_pd3dDevice) {
+    io.BackendRendererName = nullptr;
-        g_pd3dDevice->Release();
+    io.BackendRendererUserData = nullptr;
-        g_pd3dDevice = NULL;
+    io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures | ImGuiBackendFlags_RendererHasViewports);
    platform_io.ClearRendererHandlers();
    IM_DELETE(bd);
 }
 // Convert RGBA32 to BGRA32 (because RGBA32 is not well supported by DX9 devices)
 static void ImGui_ImplDX9_CopyTextureRegion(bool tex_use_colors, const ImU32* src, int src_pitch, ImU32* dst, int dst_pitch, int w, int h)
 {
 #ifndef IMGUI_USE_BGRA_PACKED_COLOR
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    const bool convert_rgba_to_bgra = (!bd->HasRgbaSupport && tex_use_colors);
 #else
    const bool convert_rgba_to_bgra = false;
    IM_UNUSED(tex_use_colors);
 #endif
    for (int y = 0; y < h; y++)
    {
        const ImU32* src_p = (const ImU32*)(const void*)((const unsigned char*)src + src_pitch * y);
        ImU32* dst_p = (ImU32*)(void*)((unsigned char*)dst + dst_pitch * y);
        if (convert_rgba_to_bgra)
            for (int x = w; x > 0; x--, src_p++, dst_p++) // Convert copy
                *dst_p = IMGUI_COL_TO_DX9_ARGB(*src_p);
        else
            memcpy(dst_p, src_p, w * 4); // Raw copy
    }
 }
-static bool ImGui_ImplDX9_CreateFontsTexture() {
+void ImGui_ImplDX9_UpdateTexture(ImTextureData* tex)
-    // Build texture atlas
+{
-    ImGuiIO &io = ImGui::GetIO();
+    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    unsigned char *pixels;
    int width, height, bytes_per_pixel;
    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height, &bytes_per_pixel);
-    // Upload texture to graphics system
+    if (tex->Status == ImTextureStatus_WantCreate)
-    g_FontTexture = NULL;
+    {
-    if (g_pd3dDevice->CreateTexture(width, height, 1, D3DUSAGE_DYNAMIC, D3DFMT_A8R8G8B8,
+        // Create and upload new texture to graphics system
-                                    D3DPOOL_DEFAULT, &g_FontTexture, NULL) < 0)
+        //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
-        return false;
+        IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
-    D3DLOCKED_RECT tex_locked_rect;
+        IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
-    if (g_FontTexture->LockRect(0, &tex_locked_rect, NULL, 0) != D3D_OK)
+        LPDIRECT3DTEXTURE9 dx_tex = nullptr;
-        return false;
+        HRESULT hr = bd->pd3dDevice->CreateTexture(tex->Width, tex->Height, 1, D3DUSAGE_DYNAMIC, bd->HasRgbaSupport ? D3DFMT_A8B8G8R8 : D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &dx_tex, nullptr);
-    for (int y = 0; y < height; y++)
+        if (hr < 0)
-        memcpy((unsigned char *) tex_locked_rect.pBits + tex_locked_rect.Pitch * y,
+        {
-               pixels + (width * bytes_per_pixel) * y, (width * bytes_per_pixel));
+            IM_ASSERT(hr >= 0 && "Backend failed to create texture!");
-    g_FontTexture->UnlockRect(0);
+            return;
    // Store our identifier
    io.Fonts->TexID = (ImTextureID) g_FontTexture;
    return true;
 }
 bool ImGui_ImplDX9_CreateDeviceObjects() {
    if (!g_pd3dDevice) {
        return false;
    }
    return ImGui_ImplDX9_CreateFontsTexture();
 }
 void ImGui_ImplDX9_InvalidateDeviceObjects() {
    if (!g_pd3dDevice)
        return;
    if (g_pVB) {
        g_pVB->Release();
        g_pVB = NULL;
    }
    if (g_pIB) {
        g_pIB->Release();
        g_pIB = NULL;
    }
    if (g_FontTexture) {
        g_FontTexture->Release();
        g_FontTexture = NULL;
        ImGui::GetIO().Fonts->TexID = 0;
    } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
 }
 void ImGui_ImplDX9_NewFrame() {
    if (!g_FontTexture) {
        ImGui_ImplDX9_CreateDeviceObjects();
    }
    IDirect3DSwapChain9 *swap_chain = nullptr;
    if (SUCCEEDED(g_pd3dDevice->GetSwapChain(0, &swap_chain))) {
        auto &io = ImGui::GetIO();
        D3DPRESENT_PARAMETERS present_params {};
        if (SUCCEEDED(swap_chain->GetPresentParameters(&present_params))) {
            if (present_params.BackBufferWidth != 0 && present_params.BackBufferHeight != 0) {
                io.DisplaySize.x = static_cast<float>(present_params.BackBufferWidth);
                io.DisplaySize.y = static_cast<float>(present_params.BackBufferHeight);
            } else {
                RECT rect {};
                GetClientRect(present_params.hDeviceWindow, &rect);
                io.DisplaySize.x = static_cast<float>(rect.right - rect.left);
                io.DisplaySize.y = static_cast<float>(rect.bottom - rect.top);
            }
        }
-        swap_chain->Release();
+        D3DLOCKED_RECT locked_rect;
        if (dx_tex->LockRect(0, &locked_rect, nullptr, 0) == D3D_OK)
        {
            ImGui_ImplDX9_CopyTextureRegion(tex->UseColors, (ImU32*)tex->GetPixels(), tex->Width * 4, (ImU32*)locked_rect.pBits, (ImU32)locked_rect.Pitch, tex->Width, tex->Height);
            dx_tex->UnlockRect(0);
        }
        // Store identifiers
        tex->SetTexID((ImTextureID)(intptr_t)dx_tex);
        tex->SetStatus(ImTextureStatus_OK);
    }
    else if (tex->Status == ImTextureStatus_WantUpdates)
    {
        // Update selected blocks. We only ever write to textures regions which have never been used before!
        // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
        LPDIRECT3DTEXTURE9 backend_tex = (LPDIRECT3DTEXTURE9)(intptr_t)tex->TexID;
        RECT update_rect = { (LONG)tex->UpdateRect.x, (LONG)tex->UpdateRect.y, (LONG)(tex->UpdateRect.x + tex->UpdateRect.w), (LONG)(tex->UpdateRect.y + tex->UpdateRect.h) };
        D3DLOCKED_RECT locked_rect;
        if (backend_tex->LockRect(0, &locked_rect, &update_rect, 0) == D3D_OK)
            for (ImTextureRect& r : tex->Updates)
                ImGui_ImplDX9_CopyTextureRegion(tex->UseColors, (ImU32*)tex->GetPixelsAt(r.x, r.y), tex->Width * 4,
                    (ImU32*)locked_rect.pBits + (r.x - update_rect.left) + (r.y - update_rect.top) * (locked_rect.Pitch / 4), (int)locked_rect.Pitch, r.w, r.h);
        backend_tex->UnlockRect(0);
        tex->SetStatus(ImTextureStatus_OK);
    }
    else if (tex->Status == ImTextureStatus_WantDestroy)
    {
        if (tex->TexID != ImTextureID_Invalid)
            if (LPDIRECT3DTEXTURE9 backend_tex = (LPDIRECT3DTEXTURE9)tex->TexID)
            {
                IM_ASSERT(tex->TexID == (ImTextureID)(intptr_t)backend_tex);
                backend_tex->Release();
                // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
                tex->SetTexID(ImTextureID_Invalid);
            }
        tex->SetStatus(ImTextureStatus_Destroyed);
    }
 }
 bool ImGui_ImplDX9_CreateDeviceObjects()
 {
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    if (!bd || !bd->pd3dDevice)
        return false;
    ImGui_ImplDX9_CreateDeviceObjectsForPlatformWindows();
    return true;
 }
 void ImGui_ImplDX9_InvalidateDeviceObjects()
 {
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    if (!bd || !bd->pd3dDevice)
        return;
    // Destroy all textures
    for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
        if (tex->RefCount == 1)
        {
            tex->SetStatus(ImTextureStatus_WantDestroy);
            ImGui_ImplDX9_UpdateTexture(tex);
        }
    if (bd->pVB) { bd->pVB->Release(); bd->pVB = nullptr; }
    if (bd->pIB) { bd->pIB->Release(); bd->pIB = nullptr; }
    ImGui_ImplDX9_InvalidateDeviceObjectsForPlatformWindows();
 }
 void ImGui_ImplDX9_NewFrame()
 {
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplDX9_Init()?");
    // IM_UNUSED(bd);
    // spice ldj
    {
        IDirect3DSwapChain9 *swap_chain = nullptr;
        if (SUCCEEDED(bd->pd3dDevice->GetSwapChain(0, &swap_chain))) {
            auto &io = ImGui::GetIO();
            D3DPRESENT_PARAMETERS present_params {};
            if (SUCCEEDED(swap_chain->GetPresentParameters(&present_params))) {
                if (present_params.BackBufferWidth != 0 && present_params.BackBufferHeight != 0) {
                    io.DisplaySize.x = static_cast<float>(present_params.BackBufferWidth);
                    io.DisplaySize.y = static_cast<float>(present_params.BackBufferHeight);
                } else {
                    RECT rect {};
                    GetClientRect(present_params.hDeviceWindow, &rect);
                    io.DisplaySize.x = static_cast<float>(rect.right - rect.left);
                    io.DisplaySize.y = static_cast<float>(rect.bottom - rect.top);
                }
            }
            swap_chain->Release();
        }
    }
 }
 //--------------------------------------------------------------------------------------------------------
 // MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
 // This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
 // If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
 //--------------------------------------------------------------------------------------------------------
 // Helper structure we store in the void* RendererUserData field of each ImGuiViewport to easily retrieve our backend data.
 struct ImGui_ImplDX9_ViewportData
 {
    IDirect3DSwapChain9*    SwapChain;
    D3DPRESENT_PARAMETERS   d3dpp;
    ImGui_ImplDX9_ViewportData()  { SwapChain = nullptr; ZeroMemory(&d3dpp, sizeof(D3DPRESENT_PARAMETERS)); }
    ~ImGui_ImplDX9_ViewportData() { IM_ASSERT(SwapChain == nullptr); }
 };
 static void ImGui_ImplDX9_CreateWindow(ImGuiViewport* viewport)
 {
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    ImGui_ImplDX9_ViewportData* vd = IM_NEW(ImGui_ImplDX9_ViewportData)();
    viewport->RendererUserData = vd;
    // PlatformHandleRaw should always be a HWND, whereas PlatformHandle might be a higher-level handle (e.g. GLFWWindow*, SDL's WindowID).
    // Some backends will leave PlatformHandleRaw == 0, in which case we assume PlatformHandle will contain the HWND.
    HWND hwnd = viewport->PlatformHandleRaw ? (HWND)viewport->PlatformHandleRaw : (HWND)viewport->PlatformHandle;
    IM_ASSERT(hwnd != 0);
    ZeroMemory(&vd->d3dpp, sizeof(D3DPRESENT_PARAMETERS));
    vd->d3dpp.Windowed = TRUE;
    vd->d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    vd->d3dpp.BackBufferWidth = (UINT)viewport->Size.x;
    vd->d3dpp.BackBufferHeight = (UINT)viewport->Size.y;
    vd->d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
    vd->d3dpp.hDeviceWindow = hwnd;
    vd->d3dpp.EnableAutoDepthStencil = FALSE;
    vd->d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
    vd->d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;   // Present without vsync
    HRESULT hr = bd->pd3dDevice->CreateAdditionalSwapChain(&vd->d3dpp, &vd->SwapChain); IM_UNUSED(hr);
    IM_ASSERT(hr == D3D_OK);
    IM_ASSERT(vd->SwapChain != nullptr);
 }
 static void ImGui_ImplDX9_DestroyWindow(ImGuiViewport* viewport)
 {
    // The main viewport (owned by the application) will always have RendererUserData == 0 since we didn't create the data for it.
    if (ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData)
    {
        if (vd->SwapChain)
            vd->SwapChain->Release();
        vd->SwapChain = nullptr;
        ZeroMemory(&vd->d3dpp, sizeof(D3DPRESENT_PARAMETERS));
        IM_DELETE(vd);
    }
    viewport->RendererUserData = nullptr;
 }
 static void ImGui_ImplDX9_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
 {
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData;
    if (vd->SwapChain)
    {
        vd->SwapChain->Release();
        vd->SwapChain = nullptr;
        vd->d3dpp.BackBufferWidth = (UINT)size.x;
        vd->d3dpp.BackBufferHeight = (UINT)size.y;
        HRESULT hr = bd->pd3dDevice->CreateAdditionalSwapChain(&vd->d3dpp, &vd->SwapChain); IM_UNUSED(hr);
        IM_ASSERT(hr == D3D_OK);
    }
 }
 static void ImGui_ImplDX9_RenderWindow(ImGuiViewport* viewport, void*)
 {
    ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
    ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData;
    ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);
    LPDIRECT3DSURFACE9 render_target = nullptr;
    LPDIRECT3DSURFACE9 last_render_target = nullptr;
    LPDIRECT3DSURFACE9 last_depth_stencil = nullptr;
    vd->SwapChain->GetBackBuffer(0, D3DBACKBUFFER_TYPE_MONO, &render_target);
    bd->pd3dDevice->GetRenderTarget(0, &last_render_target);
    bd->pd3dDevice->GetDepthStencilSurface(&last_depth_stencil);
    bd->pd3dDevice->SetRenderTarget(0, render_target);
    bd->pd3dDevice->SetDepthStencilSurface(nullptr);
    if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
    {
        D3DCOLOR clear_col_dx = D3DCOLOR_RGBA((int)(clear_color.x*255.0f), (int)(clear_color.y*255.0f), (int)(clear_color.z*255.0f), (int)(clear_color.w*255.0f));
        bd->pd3dDevice->Clear(0, nullptr, D3DCLEAR_TARGET, clear_col_dx, 1.0f, 0);
    }
    ImGui_ImplDX9_RenderDrawData(viewport->DrawData);
    // Restore render target
    bd->pd3dDevice->SetRenderTarget(0, last_render_target);
    bd->pd3dDevice->SetDepthStencilSurface(last_depth_stencil);
    render_target->Release();
    last_render_target->Release();
    if (last_depth_stencil) last_depth_stencil->Release();
 }
 static void ImGui_ImplDX9_SwapBuffers(ImGuiViewport* viewport, void*)
 {
    ImGui_ImplDX9_ViewportData* vd = (ImGui_ImplDX9_ViewportData*)viewport->RendererUserData;
    HRESULT hr = vd->SwapChain->Present(nullptr, nullptr, vd->d3dpp.hDeviceWindow, nullptr, 0);
    // Let main application handle D3DERR_DEVICELOST by resetting the device.
    IM_ASSERT(SUCCEEDED(hr) || hr == D3DERR_DEVICELOST);
 }
 static void ImGui_ImplDX9_InitMultiViewportSupport()
 {
    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
    platform_io.Renderer_CreateWindow = ImGui_ImplDX9_CreateWindow;
    platform_io.Renderer_DestroyWindow = ImGui_ImplDX9_DestroyWindow;
    platform_io.Renderer_SetWindowSize = ImGui_ImplDX9_SetWindowSize;
    platform_io.Renderer_RenderWindow = ImGui_ImplDX9_RenderWindow;
    platform_io.Renderer_SwapBuffers = ImGui_ImplDX9_SwapBuffers;
 }
 static void ImGui_ImplDX9_ShutdownMultiViewportSupport()
 {
    ImGui::DestroyPlatformWindows();
 }
 static void ImGui_ImplDX9_CreateDeviceObjectsForPlatformWindows()
 {
    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
    for (int i = 1; i < platform_io.Viewports.Size; i++)
        if (!platform_io.Viewports[i]->RendererUserData)
            ImGui_ImplDX9_CreateWindow(platform_io.Viewports[i]);
 }
 static void ImGui_ImplDX9_InvalidateDeviceObjectsForPlatformWindows()
 {
    ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
    for (int i = 1; i < platform_io.Viewports.Size; i++)
        if (platform_io.Viewports[i]->RendererUserData)
            ImGui_ImplDX9_DestroyWindow(platform_io.Viewports[i]);
 }
 //-----------------------------------------------------------------------------
 #endif // #ifndef IMGUI_DISABLE
@@ -1,25 +1,38 @@
-// dear imgui: Renderer for DirectX9
+// dear imgui: Renderer Backend for DirectX9
-// This needs to be used along with a Platform Binding (e.g. Win32)
+// This needs to be used along with a Platform Backend (e.g. Win32)
 // Implemented features:
-//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
-//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+//  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset).
 //  [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
 //  [X] Renderer: IMGUI_USE_BGRA_PACKED_COLOR support, as this is the optimal color encoding for DirectX9.
 //  [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
-// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
-// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
-// https://github.com/ocornut/imgui
+// Learn about Dear ImGui:
 // - FAQ                  https://dearimgui.com/faq
 // - Getting Started      https://dearimgui.com/getting-started
 // - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
 // - Introduction, links and more at the top of imgui.cpp
 #pragma once
-
+#include "imgui.h"      // IMGUI_IMPL_API
-#include "imgui.h"
+#ifndef IMGUI_DISABLE
 struct IDirect3DDevice9;
-IMGUI_IMPL_API bool     ImGui_ImplDX9_Init(IDirect3DDevice9 *device);
+// Follow "Getting Started" link and check examples/ folder to learn about using backends!
 IMGUI_IMPL_API bool     ImGui_ImplDX9_Init(IDirect3DDevice9* device);
 IMGUI_IMPL_API void     ImGui_ImplDX9_Shutdown();
 IMGUI_IMPL_API void     ImGui_ImplDX9_NewFrame();
-IMGUI_IMPL_API void     ImGui_ImplDX9_RenderDrawData(ImDrawData *draw_data);
+IMGUI_IMPL_API void     ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data);
-// Use if you want to reset your rendering device without losing ImGui state.
+// Use if you want to reset your rendering device without losing Dear ImGui state.
 IMGUI_IMPL_API bool     ImGui_ImplDX9_CreateDeviceObjects();
 IMGUI_IMPL_API void     ImGui_ImplDX9_InvalidateDeviceObjects();
 // (Advanced) Use e.g. if you need to precisely control the timing of texture updates (e.g. for staged rendering), by setting ImDrawData::Textures = nullptr to handle this manually.
 IMGUI_IMPL_API void     ImGui_ImplDX9_UpdateTexture(ImTextureData* tex);
 #endif // #ifndef IMGUI_DISABLE
@@ -15,7 +15,8 @@
 #pragma once
 //---- Define assertion handler. Defaults to calling assert().
-// If your macro uses multiple statements, make sure is enclosed in a 'do { .. } while (0)' block so it can be used as a single statement.
+// - If your macro uses multiple statements, make sure is enclosed in a 'do { .. } while (0)' block so it can be used as a single statement.
 // - Compiling with NDEBUG will usually strip out assert() to nothing, which is NOT recommended because we use asserts to notify of programmer mistakes.
 //#define IM_ASSERT(_EXPR)  MyAssert(_EXPR)
 #define IM_ASSERT(_EXPR)  ((void)(_EXPR))     // Disable asserts
@@ -29,7 +30,6 @@
 //---- Don't define obsolete functions/enums/behaviors. Consider enabling from time to time after updating to clean your code of obsolete function/names.
 //#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS
 #define IMGUI_DISABLE_OBSOLETE_KEYIO                      // 1.87+ disable legacy io.KeyMap[]+io.KeysDown[] in favor io.AddKeyEvent(). This is automatically done by IMGUI_DISABLE_OBSOLETE_FUNCTIONS.
 //---- Disable all of Dear ImGui or don't implement standard windows/tools.
 // It is very strongly recommended to NOT disable the demo windows and debug tool during development. They are extremely useful in day to day work. Please read comments in imgui_demo.cpp.
@@ -49,6 +49,7 @@
 //#define IMGUI_DISABLE_FILE_FUNCTIONS                      // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle at all (replace them with dummies)
 //#define IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS              // Don't implement ImFileOpen/ImFileClose/ImFileRead/ImFileWrite and ImFileHandle so you can implement them yourself if you don't want to link with fopen/fclose/fread/fwrite. This will also disable the LogToTTY() function.
 #define IMGUI_DISABLE_DEFAULT_ALLOCATORS                  // Don't implement default allocators calling malloc()/free() to avoid linking with them. You will need to call ImGui::SetAllocatorFunctions().
 //#define IMGUI_DISABLE_DEFAULT_FONT                        // Disable default embedded fonts (ProggyClean/ProggyForever), remove ~9 KB + ~14 KB from output binary. AddFontDefaultXXX() functions will assert.
 //#define IMGUI_DISABLE_SSE                                 // Disable use of SSE intrinsics even if available
 //---- Enable Test Engine / Automation features.
@@ -59,12 +60,15 @@
 //#define IMGUI_INCLUDE_IMGUI_USER_H
 //#define IMGUI_USER_H_FILENAME         "my_folder/my_imgui_user.h"
-//---- Pack colors to BGRA8 instead of RGBA8 (to avoid converting from one to another)
+//---- Pack vertex colors as BGRA8 instead of RGBA8 (to avoid converting from one to another). Need dedicated backend support.
 #define IMGUI_USE_BGRA_PACKED_COLOR
 //---- Performance optimization for DX9
 #define IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT struct ImDrawVert { ImVec2 pos; float z; ImU32 col; ImVec2 uv; }
 //---- Use legacy CRC32-adler tables (used before 1.91.6), in order to preserve old .ini data that you cannot afford to invalidate.
 //#define IMGUI_USE_LEGACY_CRC32_ADLER
 //---- Use 32-bit for ImWchar (default is 16-bit) to support Unicode planes 1-16. (e.g. point beyond 0xFFFF like emoticons, dingbats, symbols, shapes, ancient languages, etc...)
 //#define IMGUI_USE_WCHAR32
@@ -83,13 +87,13 @@
 //---- Use FreeType to build and rasterize the font atlas (instead of stb_truetype which is embedded by default in Dear ImGui)
 // Requires FreeType headers to be available in the include path. Requires program to be compiled with 'misc/freetype/imgui_freetype.cpp' (in this repository) + the FreeType library (not provided).
 // Note that imgui_freetype.cpp may be used _without_ this define, if you manually call ImFontAtlas::SetFontLoader(). The define is simply a convenience.
 // On Windows you may use vcpkg with 'vcpkg install freetype --triplet=x64-windows' + 'vcpkg integrate install'.
 //#define IMGUI_ENABLE_FREETYPE
 //---- Use FreeType + plutosvg or lunasvg to render OpenType SVG fonts (SVGinOT)
 // Only works in combination with IMGUI_ENABLE_FREETYPE.
-// - lunasvg is currently easier to acquire/install, as e.g. it is part of vcpkg.
+// - plutosvg is currently easier to install, as e.g. it is part of vcpkg. It will support more fonts and may load them faster. See misc/freetype/README for instructions.
 // - plutosvg will support more fonts and may load them faster. It currently requires to be built manually but it is fairly easy. See misc/freetype/README for instructions.
 // - Both require headers to be available in the include path + program to be linked with the library code (not provided).
 // - (note: lunasvg implementation is based on Freetype's rsvg-port.c which is licensed under CeCILL-C Free Software License Agreement)
 //#define IMGUI_ENABLE_FREETYPE_PLUTOSVG
@@ -130,6 +134,10 @@
 //#define IM_DEBUG_BREAK  IM_ASSERT(0)
 //#define IM_DEBUG_BREAK  __debugbreak()
 //---- Debug Tools: Enable highlight ID conflicts _before_ hovering items. When io.ConfigDebugHighlightIdConflicts is set.
 // (THIS WILL SLOW DOWN DEAR IMGUI. Only use occasionally and disable after use)
 //#define IMGUI_DEBUG_HIGHLIGHT_ALL_ID_CONFLICTS
 //---- Debug Tools: Enable slower asserts
 //#define IMGUI_DEBUG_PARANOID
@@ -315,7 +315,7 @@ static int stbrp__skyline_find_min_y(stbrp_context *c, stbrp_node *first, int x0
      if (node->y > min_y) {
         // raise min_y higher.
         // we've accounted for all waste up to min_y,
-         // but we'll now add more waste for everything we've visted
+         // but we'll now add more waste for everything we've visited
         waste_area += visited_width * (node->y - min_y);
         min_y = node->y;
         // the first time through, visited_width might be reduced
@@ -470,7 +470,7 @@ static stbrp__findresult stbrp__skyline_pack_rectangle(stbrp_context *context, i
   // insert the new node into the right starting point, and
   // let 'cur' point to the remaining nodes needing to be
-   // stiched back in
+   // stitched back in
   cur = *res.prev_link;
   if (cur->x < res.x) {
@@ -5,7 +5,8 @@
 // - Fix in stb_textedit_find_charpos to handle last line (see https://github.com/ocornut/imgui/issues/6000 + #6783)
 // - Added name to struct or it may be forward declared in our code.
 // - Added UTF-8 support (see https://github.com/nothings/stb/issues/188 + https://github.com/ocornut/imgui/pull/7925)
-// Grep for [DEAR IMGUI] to find the changes.
+// - Changed STB_TEXTEDIT_INSERTCHARS() to return inserted count (instead of 0/1 bool), allowing partial insertion.
 // Grep for [DEAR IMGUI] to find some changes.
 // - Also renamed macros used or defined outside of IMSTB_TEXTEDIT_IMPLEMENTATION block from STB_TEXTEDIT_* to IMSTB_TEXTEDIT_*
 // stb_textedit.h - v1.14  - public domain - Sean Barrett
@@ -39,6 +40,7 @@
 //
 // VERSION HISTORY
 //
 //   !!!! (2025-10-23) changed STB_TEXTEDIT_INSERTCHARS() to return inserted count (instead of 0/1 bool), allowing partial insertion.
 //   1.14 (2021-07-11) page up/down, various fixes
 //   1.13 (2019-02-07) fix bug in undo size management
 //   1.12 (2018-01-29) user can change STB_TEXTEDIT_KEYTYPE, fix redo to avoid crash
@@ -141,12 +143,14 @@
 //                                        with previous char)
 //    STB_TEXTEDIT_KEYTOTEXT(k)         maps a keyboard input to an insertable character
 //                                        (return type is int, -1 means not valid to insert)
 //                                        (not supported if you want to use UTF-8, see below)
 //    STB_TEXTEDIT_GETCHAR(obj,i)       returns the i'th character of obj, 0-based
 //    STB_TEXTEDIT_NEWLINE              the character returned by _GETCHAR() we recognize
 //                                        as manually wordwrapping for end-of-line positioning
 //
 //    STB_TEXTEDIT_DELETECHARS(obj,i,n)      delete n characters starting at i
-//    STB_TEXTEDIT_INSERTCHARS(obj,i,c*,n)   insert n characters at i (pointed to by STB_TEXTEDIT_CHARTYPE*)
+//    STB_TEXTEDIT_INSERTCHARS(obj,i,c*,n)   try to insert n characters at i (pointed to by STB_TEXTEDIT_CHARTYPE*)
 //                                           returns number of characters actually inserted. [DEAR IMGUI]
 //
 //    STB_TEXTEDIT_K_SHIFT       a power of two that is or'd in to a keyboard input to represent the shift key
 //
@@ -178,6 +182,13 @@
 //    STB_TEXTEDIT_K_TEXTSTART2          secondary keyboard input to move cursor to start of text
 //    STB_TEXTEDIT_K_TEXTEND2            secondary keyboard input to move cursor to end of text
 //
 // To support UTF-8:
 //
 //    STB_TEXTEDIT_GETPREVCHARINDEX      returns index of previous character
 //    STB_TEXTEDIT_GETNEXTCHARINDEX      returns index of next character
 //    Do NOT define STB_TEXTEDIT_KEYTOTEXT.
 //    Instead, call stb_textedit_text() directly for text contents.
 //
 // Keyboard input must be encoded as a single integer value; e.g. a character code
 // and some bitflags that represent shift states. to simplify the interface, SHIFT must
 // be a bitflag, so we can test the shifted state of cursor movements to allow selection,
@@ -250,8 +261,10 @@
 //          if the STB_TEXTEDIT_KEYTOTEXT function is defined, selected keys are
 //          transformed into text and stb_textedit_text() is automatically called.
 //
-//      text: [DEAR IMGUI] added 2024-09
+//      text: (added 2025)
-//          call this to text inputs sent to the textfield.
+//          call this to directly send text input the textfield, which is required
 //          for UTF-8 support, because stb_textedit_key() + STB_TEXTEDIT_KEYTOTEXT()
 //          cannot infer text length.
 //
 //
 //   When rendering, you can read the cursor position and selection state from
@@ -400,6 +413,16 @@ typedef struct
 #define IMSTB_TEXTEDIT_memmove memmove
 #endif
 // [DEAR IMGUI]
 // Functions must be implemented for UTF8 support
 // Code in this file that uses those functions is modified for [DEAR IMGUI] and deviates from the original stb_textedit.
 // There is not necessarily a '[DEAR IMGUI]' at the usage sites.
 #ifndef IMSTB_TEXTEDIT_GETPREVCHARINDEX
 #define IMSTB_TEXTEDIT_GETPREVCHARINDEX(OBJ, IDX) ((IDX) - 1)
 #endif
 #ifndef IMSTB_TEXTEDIT_GETNEXTCHARINDEX
 #define IMSTB_TEXTEDIT_GETNEXTCHARINDEX(OBJ, IDX) ((IDX) + 1)
 #endif
 /////////////////////////////////////////////////////////////////////////////
 //
@@ -407,7 +430,7 @@ typedef struct
 //
 // traverse the layout to locate the nearest character to a display position
-static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
+static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y, int* out_side_on_line)
 {
   StbTexteditRow r;
   int n = STB_TEXTEDIT_STRINGLEN(str);
@@ -417,6 +440,7 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
   r.x0 = r.x1 = 0;
   r.ymin = r.ymax = 0;
   r.num_chars = 0;
   *out_side_on_line = 0;
   // search rows to find one that straddles 'y'
   while (i < n) {
@@ -436,7 +460,10 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
   // below all text, return 'after' last character
   if (i >= n)
   {
      *out_side_on_line = 1;
      return n;
   }
   // check if it's before the beginning of the line
   if (x < r.x0)
@@ -449,6 +476,7 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
      for (k=0; k < r.num_chars; k = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, i + k) - i) {
         float w = STB_TEXTEDIT_GETWIDTH(str, i, k);
         if (x < prev_x+w) {
            *out_side_on_line = (k == 0) ? 0 : 1;
            if (x < prev_x+w/2)
               return k+i;
            else
@@ -460,6 +488,7 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
   }
   // if the last character is a newline, return that. otherwise return 'after' the last character
   *out_side_on_line = 1;
   if (STB_TEXTEDIT_GETCHAR(str, i+r.num_chars-1) == STB_TEXTEDIT_NEWLINE)
      return i+r.num_chars-1;
   else
@@ -471,6 +500,7 @@ static void stb_textedit_click(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *st
 {
   // In single-line mode, just always make y = 0. This lets the drag keep working if the mouse
   // goes off the top or bottom of the text
   int side_on_line;
   if( state->single_line )
   {
      StbTexteditRow r;
@@ -478,16 +508,18 @@ static void stb_textedit_click(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *st
      y = r.ymin;
   }
-   state->cursor = stb_text_locate_coord(str, x, y);
+   state->cursor = stb_text_locate_coord(str, x, y, &side_on_line);
   state->select_start = state->cursor;
   state->select_end = state->cursor;
   state->has_preferred_x = 0;
   str->LastMoveDirectionLR = (ImS8)(side_on_line ? ImGuiDir_Right : ImGuiDir_Left);
 }
 // API drag: on mouse drag, move the cursor and selection endpoint to the clicked location
 static void stb_textedit_drag(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state, float x, float y)
 {
   int p = 0;
   int side_on_line;
   // In single-line mode, just always make y = 0. This lets the drag keep working if the mouse
   // goes off the top or bottom of the text
@@ -501,8 +533,9 @@ static void stb_textedit_drag(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *sta
   if (state->select_start == state->select_end)
      state->select_start = state->cursor;
-   p = stb_text_locate_coord(str, x, y);
+   p = stb_text_locate_coord(str, x, y, &side_on_line);
   state->cursor = state->select_end = p;
   str->LastMoveDirectionLR = (ImS8)(side_on_line ? ImGuiDir_Right : ImGuiDir_Left);
 }
 /////////////////////////////////////////////////////////////////////////////
@@ -552,6 +585,8 @@ static void stb_textedit_find_charpos(StbFindState *find, IMSTB_TEXTEDIT_STRING
      STB_TEXTEDIT_LAYOUTROW(&r, str, i);
      if (n < i + r.num_chars)
         break;
      if (str->LastMoveDirectionLR == ImGuiDir_Right && str->Stb->cursor > 0 && str->Stb->cursor == i + r.num_chars && STB_TEXTEDIT_GETCHAR(str, i + r.num_chars - 1) != STB_TEXTEDIT_NEWLINE) // [DEAR IMGUI] Wrapping point handling
         break;
      if (i + r.num_chars == z && z > 0 && STB_TEXTEDIT_GETCHAR(str, z - 1) != STB_TEXTEDIT_NEWLINE)  // [DEAR IMGUI] special handling for last line
         break;   // [DEAR IMGUI]
      prev_start = i;
@@ -648,15 +683,33 @@ static void stb_textedit_move_to_last(IMSTB_TEXTEDIT_STRING *str, STB_TexteditSt
   }
 }
-// [DEAR IMGUI]
+// [DEAR IMGUI] Extracted this function so we can more easily add support for word-wrapping.
-// Functions must be implemented for UTF8 support
+#ifndef STB_TEXTEDIT_MOVELINESTART
-// Code in this file that uses those functions is modified for [DEAR IMGUI] and deviates from the original stb_textedit.
+static int stb_textedit_move_line_start(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state, int cursor)
-// There is not necessarily a '[DEAR IMGUI]' at the usage sites.
+{
-#ifndef IMSTB_TEXTEDIT_GETPREVCHARINDEX
+   if (state->single_line)
-#define IMSTB_TEXTEDIT_GETPREVCHARINDEX(obj, idx) (idx - 1)
+      return 0;
   while (cursor > 0) {
      int prev = IMSTB_TEXTEDIT_GETPREVCHARINDEX(str, cursor);
      if (STB_TEXTEDIT_GETCHAR(str, prev) == STB_TEXTEDIT_NEWLINE)
         break;
      cursor = prev;
   }
   return cursor;
 }
 #define STB_TEXTEDIT_MOVELINESTART stb_textedit_move_line_start
 #endif
-#ifndef IMSTB_TEXTEDIT_GETNEXTCHARINDEX
+#ifndef STB_TEXTEDIT_MOVELINEEND
-#define IMSTB_TEXTEDIT_GETNEXTCHARINDEX(obj, idx) (idx + 1)
+static int stb_textedit_move_line_end(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state, int cursor)
 {
   int n = STB_TEXTEDIT_STRINGLEN(str);
   if (state->single_line)
      return n;
   while (cursor < n && STB_TEXTEDIT_GETCHAR(str, cursor) != STB_TEXTEDIT_NEWLINE)
      cursor = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, cursor);
   return cursor;
 }
 #define STB_TEXTEDIT_MOVELINEEND stb_textedit_move_line_end
 #endif
 #ifdef STB_TEXTEDIT_IS_SPACE
@@ -668,9 +721,9 @@ static int is_word_boundary( IMSTB_TEXTEDIT_STRING *str, int idx )
 #ifndef STB_TEXTEDIT_MOVEWORDLEFT
 static int stb_textedit_move_to_word_previous( IMSTB_TEXTEDIT_STRING *str, int c )
 {
-   --c; // always move at least one character
+   c = IMSTB_TEXTEDIT_GETPREVCHARINDEX( str, c ); // always move at least one character
-   while( c >= 0 && !is_word_boundary( str, c ) )
+   while (c >= 0 && !is_word_boundary(str, c))
-      --c;
+      c = IMSTB_TEXTEDIT_GETPREVCHARINDEX(str, c);
   if( c < 0 )
      c = 0;
@@ -684,9 +737,9 @@ static int stb_textedit_move_to_word_previous( IMSTB_TEXTEDIT_STRING *str, int c
 static int stb_textedit_move_to_word_next( IMSTB_TEXTEDIT_STRING *str, int c )
 {
   const int len = STB_TEXTEDIT_STRINGLEN(str);
-   ++c; // always move at least one character
+   c = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, c); // always move at least one character
   while( c < len && !is_word_boundary( str, c ) )
-      ++c;
+      c = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, c);
   if( c > len )
      c = len;
@@ -725,7 +778,8 @@ static int stb_textedit_paste_internal(IMSTB_TEXTEDIT_STRING *str, STB_TexteditS
   stb_textedit_clamp(str, state);
   stb_textedit_delete_selection(str,state);
   // try to insert the characters
-   if (STB_TEXTEDIT_INSERTCHARS(str, state->cursor, text, len)) {
+   len = STB_TEXTEDIT_INSERTCHARS(str, state->cursor, text, len);
   if (len) {
      stb_text_makeundo_insert(state, state->cursor, len);
      state->cursor += len;
      state->has_preferred_x = 0;
@@ -739,6 +793,7 @@ static int stb_textedit_paste_internal(IMSTB_TEXTEDIT_STRING *str, STB_TexteditS
 #define STB_TEXTEDIT_KEYTYPE int
 #endif
 // API key: process text input
 // [DEAR IMGUI] Added stb_textedit_text(), extracted out and called by stb_textedit_key() for backward compatibility.
 static void stb_textedit_text(IMSTB_TEXTEDIT_STRING* str, STB_TexteditState* state, const IMSTB_TEXTEDIT_CHARTYPE* text, int text_len)
 {
@@ -749,14 +804,15 @@ static void stb_textedit_text(IMSTB_TEXTEDIT_STRING* str, STB_TexteditState* sta
   if (state->insert_mode && !STB_TEXT_HAS_SELECTION(state) && state->cursor < STB_TEXTEDIT_STRINGLEN(str)) {
      stb_text_makeundo_replace(str, state, state->cursor, 1, 1);
      STB_TEXTEDIT_DELETECHARS(str, state->cursor, 1);
-      if (STB_TEXTEDIT_INSERTCHARS(str, state->cursor, text, text_len)) {
+      text_len = STB_TEXTEDIT_INSERTCHARS(str, state->cursor, text, text_len);
      if (text_len) {
         state->cursor += text_len;
         state->has_preferred_x = 0;
      }
-   }
+   } else {
   else {
      stb_textedit_delete_selection(str, state); // implicitly clamps
-      if (STB_TEXTEDIT_INSERTCHARS(str, state->cursor, text, text_len)) {
+      text_len = STB_TEXTEDIT_INSERTCHARS(str, state->cursor, text, text_len);
      if (text_len) {
         stb_text_makeundo_insert(state, state->cursor, text_len);
         state->cursor += text_len;
         state->has_preferred_x = 0;
@@ -771,6 +827,7 @@ retry:
   switch (key) {
      default: {
 #ifdef STB_TEXTEDIT_KEYTOTEXT
         // This is not suitable for UTF-8 support.
         int c = STB_TEXTEDIT_KEYTOTEXT(key);
         if (c > 0) {
            IMSTB_TEXTEDIT_CHARTYPE ch = (IMSTB_TEXTEDIT_CHARTYPE)c;
@@ -911,15 +968,16 @@ retry:
            // [DEAR IMGUI]
            // going down while being on the last line shouldn't bring us to that line end
-            if (STB_TEXTEDIT_GETCHAR(str, find.first_char + find.length - 1) != STB_TEXTEDIT_NEWLINE)
+            //if (STB_TEXTEDIT_GETCHAR(str, find.first_char + find.length - 1) != STB_TEXTEDIT_NEWLINE)
-               break;
+            //   break;
            // now find character position down a row
            state->cursor = start;
            STB_TEXTEDIT_LAYOUTROW(&row, str, state->cursor);
            x = row.x0;
-            for (i=0; i < row.num_chars; ++i) {
+            for (i=0; i < row.num_chars; ) {
               float dx = STB_TEXTEDIT_GETWIDTH(str, start, i);
               int next = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, state->cursor);
               #ifdef IMSTB_TEXTEDIT_GETWIDTH_NEWLINE
               if (dx == IMSTB_TEXTEDIT_GETWIDTH_NEWLINE)
                  break;
@@ -927,10 +985,13 @@ retry:
               x += dx;
               if (x > goal_x)
                  break;
-               state->cursor = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, state->cursor);
+               i += next - state->cursor;
               state->cursor = next;
            }
            stb_textedit_clamp(str, state);
            if (state->cursor == find.first_char + find.length)
               str->LastMoveDirectionLR = ImGuiDir_Left;
            state->has_preferred_x = 1;
            state->preferred_x = goal_x;
@@ -980,8 +1041,9 @@ retry:
            state->cursor = find.prev_first;
            STB_TEXTEDIT_LAYOUTROW(&row, str, state->cursor);
            x = row.x0;
-            for (i=0; i < row.num_chars; ++i) {
+            for (i=0; i < row.num_chars; ) {
               float dx = STB_TEXTEDIT_GETWIDTH(str, find.prev_first, i);
               int next = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, state->cursor);
               #ifdef IMSTB_TEXTEDIT_GETWIDTH_NEWLINE
               if (dx == IMSTB_TEXTEDIT_GETWIDTH_NEWLINE)
                  break;
@@ -989,10 +1051,15 @@ retry:
               x += dx;
               if (x > goal_x)
                  break;
-               state->cursor = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, state->cursor);
+               i += next - state->cursor;
               state->cursor = next;
            }
            stb_textedit_clamp(str, state);
            if (state->cursor == find.first_char)
               str->LastMoveDirectionLR = ImGuiDir_Right;
            else if (state->cursor == find.prev_first)
               str->LastMoveDirectionLR = ImGuiDir_Left;
            state->has_preferred_x = 1;
            state->preferred_x = goal_x;
@@ -1002,10 +1069,15 @@ retry:
            // go to previous line
            // (we need to scan previous line the hard way. maybe we could expose this as a new API function?)
            prev_scan = find.prev_first > 0 ? find.prev_first - 1 : 0;
-            while (prev_scan > 0 && STB_TEXTEDIT_GETCHAR(str, prev_scan - 1) != STB_TEXTEDIT_NEWLINE)
+            while (prev_scan > 0)
-               --prev_scan;
+            {
               int prev = IMSTB_TEXTEDIT_GETPREVCHARINDEX(str, prev_scan);
               if (STB_TEXTEDIT_GETCHAR(str, prev) == STB_TEXTEDIT_NEWLINE)
                  break;
               prev_scan = prev;
            }
            find.first_char = find.prev_first;
-            find.prev_first = prev_scan;
+            find.prev_first = STB_TEXTEDIT_MOVELINESTART(str, state, prev_scan);
         }
         break;
      }
@@ -1079,10 +1151,7 @@ retry:
      case STB_TEXTEDIT_K_LINESTART:
         stb_textedit_clamp(str, state);
         stb_textedit_move_to_first(state);
-         if (state->single_line)
+         state->cursor = STB_TEXTEDIT_MOVELINESTART(str, state, state->cursor);
            state->cursor = 0;
         else while (state->cursor > 0 && STB_TEXTEDIT_GETCHAR(str, state->cursor-1) != STB_TEXTEDIT_NEWLINE)
            --state->cursor;
         state->has_preferred_x = 0;
         break;
@@ -1090,13 +1159,9 @@ retry:
      case STB_TEXTEDIT_K_LINEEND2:
 #endif
      case STB_TEXTEDIT_K_LINEEND: {
         int n = STB_TEXTEDIT_STRINGLEN(str);
         stb_textedit_clamp(str, state);
-         stb_textedit_move_to_first(state);
+         stb_textedit_move_to_last(str, state);
-         if (state->single_line)
+         state->cursor = STB_TEXTEDIT_MOVELINEEND(str, state, state->cursor);
             state->cursor = n;
         else while (state->cursor < n && STB_TEXTEDIT_GETCHAR(str, state->cursor) != STB_TEXTEDIT_NEWLINE)
             ++state->cursor;
         state->has_preferred_x = 0;
         break;
      }
@@ -1107,10 +1172,7 @@ retry:
      case STB_TEXTEDIT_K_LINESTART | STB_TEXTEDIT_K_SHIFT:
         stb_textedit_clamp(str, state);
         stb_textedit_prep_selection_at_cursor(state);
-         if (state->single_line)
+         state->cursor = STB_TEXTEDIT_MOVELINESTART(str, state, state->cursor);
            state->cursor = 0;
         else while (state->cursor > 0 && STB_TEXTEDIT_GETCHAR(str, state->cursor-1) != STB_TEXTEDIT_NEWLINE)
            --state->cursor;
         state->select_end = state->cursor;
         state->has_preferred_x = 0;
         break;
@@ -1119,13 +1181,9 @@ retry:
      case STB_TEXTEDIT_K_LINEEND2 | STB_TEXTEDIT_K_SHIFT:
 #endif
      case STB_TEXTEDIT_K_LINEEND | STB_TEXTEDIT_K_SHIFT: {
         int n = STB_TEXTEDIT_STRINGLEN(str);
         stb_textedit_clamp(str, state);
         stb_textedit_prep_selection_at_cursor(state);
-         if (state->single_line)
+         state->cursor = STB_TEXTEDIT_MOVELINEEND(str, state, state->cursor);
             state->cursor = n;
         else while (state->cursor < n && STB_TEXTEDIT_GETCHAR(str, state->cursor) != STB_TEXTEDIT_NEWLINE)
            ++state->cursor;
         state->select_end = state->cursor;
         state->has_preferred_x = 0;
         break;
@@ -1300,7 +1358,7 @@ static void stb_text_undo(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state)
   // check type of recorded action:
   if (u.insert_length) {
      // easy case: was a deletion, so we need to insert n characters
-      STB_TEXTEDIT_INSERTCHARS(str, u.where, &s->undo_char[u.char_storage], u.insert_length);
+      u.insert_length = STB_TEXTEDIT_INSERTCHARS(str, u.where, &s->undo_char[u.char_storage], u.insert_length);
      s->undo_char_point -= u.insert_length;
   }
@@ -1351,7 +1409,7 @@ static void stb_text_redo(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state)
   if (r.insert_length) {
      // easy case: need to insert n characters
-      STB_TEXTEDIT_INSERTCHARS(str, r.where, &s->undo_char[r.char_storage], r.insert_length);
+      r.insert_length = STB_TEXTEDIT_INSERTCHARS(str, r.where, &s->undo_char[r.char_storage], r.insert_length);
      s->redo_char_point += r.insert_length;
   }
@@ -886,7 +886,7 @@ STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, fl
 // xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap
 STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
-// the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel
+// the same as stbtt_GetCodepointBitmap, but you can specify a subpixel
 // shift for the character
 STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint);
@@ -4516,8 +4516,8 @@ static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex
            q2[0] = (float)x2;
            q2[1] = (float)y2;
            if (equal(q0,q1) || equal(q1,q2)) {
-               x0 = (int)verts[i-1].x;
+               x0 = (int)verts[i-1].x; //-V1048
-               y0 = (int)verts[i-1].y;
+               y0 = (int)verts[i-1].y; //-V1048
               x1 = (int)verts[i  ].x;
               y1 = (int)verts[i  ].y;
               if (y > STBTT_min(y0,y1) && y < STBTT_max(y0,y1) && x > STBTT_min(x0,x1)) {
@@ -501,7 +501,7 @@ void paint_draw_cmd(
 	const SwOptions&   options,
 	Stats*             stats)
 {
-	const auto texture = reinterpret_cast<const Texture*>(pcmd.TextureId);
+	const auto texture = reinterpret_cast<const Texture*>(pcmd.GetTexID());
    const auto offset = pcmd.IdxOffset;
 	// ImGui uses the first pixel for "white".
@@ -678,7 +678,7 @@ void bind_imgui_painting()
 	int font_width, font_height;
 	io.Fonts->GetTexDataAsAlpha8(&tex_data, &font_width, &font_height);
 	const auto texture = new Texture{tex_data, font_width, font_height};
-	io.Fonts->TexID = reinterpret_cast<ImTextureID>(texture);
+	io.Fonts->SetTexID(reinterpret_cast<ImTextureID>(texture));
 }
 static Stats s_stats; // TODO: pass as an argument?
@@ -700,7 +700,7 @@ void paint_imgui(uint32_t* pixels, int width_pixels, int height_pixels, const Sw
 void unbind_imgui_painting()
 {
 	ImGuiIO& io = ImGui::GetIO();
-	delete reinterpret_cast<Texture*>(io.Fonts->TexID);
+	delete reinterpret_cast<Texture*>(io.Fonts->TexID.GetTexID());
 	io.Fonts = nullptr;
 }
@@ -185,7 +185,7 @@ void overlay::SpiceOverlay::init() {
    if (UI_SCALE_PERCENT.has_value()) {
        const auto scale = static_cast<float>(UI_SCALE_PERCENT.value()) / 100.f;
        ImGui::GetStyle().ScaleAllSizes(scale);
-        ImGui::GetIO().FontGlobalScale = scale;
+        ImGui::GetStyle().FontScaleMain = scale;
    }
    // based on CrimsonVesuvius theme from
@@ -283,7 +283,7 @@ void overlay::SpiceOverlay::init() {
    io.FontAllowUserScaling = true;
    // add default font
-    io.Fonts->AddFontDefault();
+    io.Fonts->AddFontDefaultBitmap();
    // add fallback fonts for missing glyph ranges
    ImFontConfig config {};
@@ -2196,9 +2196,8 @@ namespace overlay::windows {
            auto analog_device_changed = ImGui::Combo(
                "Device",
                &this->analogs_devices_selected,
-                [](void* data, int i, const char **item) {
+                [](void* data, int i) {
-                    *item = ((std::vector<rawinput::Device*>*) data)->at(i)->desc.c_str();
+                    return ((std::vector<rawinput::Device*>*) data)->at(i)->desc.c_str();
                    return true;
                },
                &this->analogs_devices, (int) this->analogs_devices.size());
@@ -2317,9 +2316,8 @@ namespace overlay::windows {
            // controls
            ImGui::Combo("Control",
                        &this->analogs_devices_control_selected,
-                        [](void* data, int i, const char **item) {
+                        [](void* data, int i) {
-                            *item = ((std::vector<std::string>*) data)->at(i).c_str();
+                            return ((std::vector<std::string>*) data)->at(i).c_str();
                            return true;
                        },
                        &control_names, control_names.size());
@@ -2957,9 +2955,8 @@ namespace overlay::windows {
            bool control_changed = false;
            if (ImGui::Combo("Device",
                            &this->lights_devices_selected,
-                            [] (void* data, int i, const char **item) {
+                            [] (void* data, int i) {
-                                *item = ((std::vector<rawinput::Device*>*) data)->at(i)->desc.c_str();
+                                return ((std::vector<rawinput::Device*>*) data)->at(i)->desc.c_str();
                                return true;
                            },
                            &this->lights_devices, (int) this->lights_devices.size())) {
                this->lights_devices_control_selected = 0;
@@ -3054,9 +3051,8 @@ namespace overlay::windows {
            // controls
            if (ImGui::Combo("Light Control",
                        &this->lights_devices_control_selected,
-                        [] (void* data, int i, const char **item) {
+                        [] (void* data, int i) {
-                            *item = ((std::vector<std::string> *) data)->at(i).c_str();
+                            return ((std::vector<std::string> *) data)->at(i).c_str();
                            return true;
                        },
                        &control_names, control_names.size())) {
                control_changed = true;
@@ -3137,10 +3133,9 @@ namespace overlay::windows {
        ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
        bool device_changed = ImGui::Combo("##AutoMatchDevice",
                &this->auto_match_device_selected,
-                [] (void* data, int i, const char **item) {
+                [] (void* data, int i) {
                    auto *devs = (std::vector<rawinput::Device*>*) data;
-                    *item = devs->at(i)->desc.c_str();
+                    return devs->at(i)->desc.c_str();
                    return true;
                },
                &this->auto_match_devices,
                (int) this->auto_match_devices.size());