cpu start

2026-03-15 12:33:32 +01:00
parent af86719c5a
commit 31c2e522f5
21 changed files with 3571 additions and 1 deletions
@@ -0,0 +1,81 @@
+// dear imgui: CPU framebuffer renderer backend
+// (supports caller-owned framebuffers/textures in generic packed pixel formats)
+//
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'ImGui_ImplCPU_Texture*' as texture identifier.
+//  [X] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices.
+//  [X] Renderer: Texture updates support for dynamic font atlas.
+
+#pragma once
+#ifndef IMGUI_DISABLE
+#include "imgui.h"
+
+struct ImGui_ImplCPU_PixelFormat;
+typedef ImU32 (*ImGui_ImplCPU_MapColorFn)(const ImGui_ImplCPU_PixelFormat* format, unsigned char r, unsigned char g, unsigned char b, unsigned char a);
+
+struct ImGui_ImplCPU_PixelFormat
+{
+    int                         BitsPerPixel;
+    int                         BytesPerPixel;
+    ImU32                       Rmask;
+    ImU32                       Gmask;
+    ImU32                       Bmask;
+    ImU32                       Amask;
+    ImU8                        Rshift;
+    ImU8                        Gshift;
+    ImU8                        Bshift;
+    ImU8                        Ashift;
+    ImU8                        Rloss;
+    ImU8                        Gloss;
+    ImU8                        Bloss;
+    ImU8                        Aloss;
+    const ImU32*                Palette;        // Optional palette entries stored as IM_COL32(r, g, b, a).
+    int                         PaletteSize;    // Number of palette entries, or 0 when Palette is unused.
+    ImGui_ImplCPU_MapColorFn    MapColorFn;     // Optional indexed/paletted mapping override. Return a raw packed pixel value.
+};
+
+enum ImGui_ImplCPU_BuiltinFormat
+{
+    ImGui_ImplCPU_BuiltinFormat_RGBA8888 = 0,
+    ImGui_ImplCPU_BuiltinFormat_BGRA8888,
+    ImGui_ImplCPU_BuiltinFormat_ARGB8888,
+    ImGui_ImplCPU_BuiltinFormat_ABGR8888,
+    ImGui_ImplCPU_BuiltinFormat_RGB565,
+    ImGui_ImplCPU_BuiltinFormat_ARGB1555,
+    ImGui_ImplCPU_BuiltinFormat_RGBA4444,
+    ImGui_ImplCPU_BuiltinFormat_RGB888,
+    ImGui_ImplCPU_BuiltinFormat_BGR888,
+    ImGui_ImplCPU_BuiltinFormat_Alpha8,
+    ImGui_ImplCPU_BuiltinFormat_COUNT
+};
+
+struct ImGui_ImplCPU_Framebuffer
+{
+    unsigned char*                  Pixels;
+    int                             Width;
+    int                             Height;
+    int                             Pitch;
+    const ImGui_ImplCPU_PixelFormat* Format;    // Optional. Defaults to ImGui_ImplCPU_BuiltinFormat_RGBA8888.
+};
+
+struct ImGui_ImplCPU_Texture
+{
+    const unsigned char*            Pixels;
+    int                             Width;
+    int                             Height;
+    int                             Pitch;
+    const ImGui_ImplCPU_PixelFormat* Format;    // Optional. Defaults to ImGui_ImplCPU_BuiltinFormat_RGBA8888.
+};
+
+// Follow "Getting Started" link and check examples/ folder to learn about using backends!
+IMGUI_IMPL_API const ImGui_ImplCPU_PixelFormat* ImGui_ImplCPU_GetBuiltinPixelFormat(ImGui_ImplCPU_BuiltinFormat format);
+IMGUI_IMPL_API bool     ImGui_ImplCPU_Init();
+IMGUI_IMPL_API void     ImGui_ImplCPU_Shutdown();
+IMGUI_IMPL_API void     ImGui_ImplCPU_NewFrame();
+IMGUI_IMPL_API void     ImGui_ImplCPU_RenderDrawData(ImDrawData* draw_data, ImGui_ImplCPU_Framebuffer* framebuffer);
+
+// (Advanced) Use e.g. if you need to precisely control the timing of texture updates
+// by setting ImDrawData::Textures = nullptr to handle this manually.
+IMGUI_IMPL_API void     ImGui_ImplCPU_UpdateTexture(ImTextureData* tex);
+
+#endif // #ifndef IMGUI_DISABLE