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Diffstat (limited to 'lib/imgui-1.90.7/backends/imgui_impl_sdlrenderer3.cpp')
| -rw-r--r-- | lib/imgui-1.90.7/backends/imgui_impl_sdlrenderer3.cpp | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/lib/imgui-1.90.7/backends/imgui_impl_sdlrenderer3.cpp b/lib/imgui-1.90.7/backends/imgui_impl_sdlrenderer3.cpp deleted file mode 100644 index ae75b7c..0000000 --- a/lib/imgui-1.90.7/backends/imgui_impl_sdlrenderer3.cpp +++ /dev/null @@ -1,258 +0,0 @@ -// dear imgui: Renderer Backend for SDL_Renderer for SDL3 -// (Requires: SDL 3.0.0+) - -// Note how SDL_Renderer is an _optional_ component of SDL3. -// For a multi-platform app consider using e.g. SDL+DirectX on Windows and SDL+OpenGL on Linux/OSX. -// If your application will want to render any non trivial amount of graphics other than UI, -// please be aware that SDL_Renderer currently offers a limited graphic API to the end-user and -// it might be difficult to step out of those boundaries. - -// Implemented features: -// [X] Renderer: User texture binding. Use 'SDL_Texture*' as ImTextureID. Read the FAQ about ImTextureID! -// [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices. - -// You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. -// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need. -// 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 -// 2024-05-14: *BREAKING CHANGE* ImGui_ImplSDLRenderer3_RenderDrawData() requires SDL_Renderer* passed as parameter. -// 2024-02-12: Amend to query SDL_RenderViewportSet() and restore viewport accordingly. -// 2023-05-30: Initial version. - -#include "imgui.h" -#ifndef IMGUI_DISABLE -#include "imgui_impl_sdlrenderer3.h" -#include <stdint.h> // intptr_t - -// Clang warnings with -Weverything -#if defined(__clang__) -#pragma clang diagnostic push -#pragma clang diagnostic ignored "-Wsign-conversion" // warning: implicit conversion changes signedness -#endif - -// SDL -#include <SDL3/SDL.h> -#if !SDL_VERSION_ATLEAST(3,0,0) -#error This backend requires SDL 3.0.0+ -#endif - -// SDL_Renderer data -struct ImGui_ImplSDLRenderer3_Data -{ - SDL_Renderer* Renderer; // Main viewport's renderer - SDL_Texture* FontTexture; - ImGui_ImplSDLRenderer3_Data() { memset((void*)this, 0, sizeof(*this)); } -}; - -// Backend data stored in io.BackendRendererUserData to allow support for multiple Dear ImGui contexts -// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts. -static ImGui_ImplSDLRenderer3_Data* ImGui_ImplSDLRenderer3_GetBackendData() -{ - return ImGui::GetCurrentContext() ? (ImGui_ImplSDLRenderer3_Data*)ImGui::GetIO().BackendRendererUserData : nullptr; -} - -// Functions -bool ImGui_ImplSDLRenderer3_Init(SDL_Renderer* renderer) -{ - ImGuiIO& io = ImGui::GetIO(); - IMGUI_CHECKVERSION(); - IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!"); - IM_ASSERT(renderer != nullptr && "SDL_Renderer not initialized!"); - - // Setup backend capabilities flags - ImGui_ImplSDLRenderer3_Data* bd = IM_NEW(ImGui_ImplSDLRenderer3_Data)(); - io.BackendRendererUserData = (void*)bd; - io.BackendRendererName = "imgui_impl_sdlrenderer3"; - io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes. - - bd->Renderer = renderer; - - return true; -} - -void ImGui_ImplSDLRenderer3_Shutdown() -{ - ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData(); - IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?"); - ImGuiIO& io = ImGui::GetIO(); - - ImGui_ImplSDLRenderer3_DestroyDeviceObjects(); - - io.BackendRendererName = nullptr; - io.BackendRendererUserData = nullptr; - io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset; - IM_DELETE(bd); -} - -static void ImGui_ImplSDLRenderer3_SetupRenderState(SDL_Renderer* renderer) -{ - // Clear out any viewports and cliprect set by the user - // FIXME: Technically speaking there are lots of other things we could backup/setup/restore during our render process. - SDL_SetRenderViewport(renderer, nullptr); - SDL_SetRenderClipRect(renderer, nullptr); -} - -void ImGui_ImplSDLRenderer3_NewFrame() -{ - ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData(); - IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplSDLRenderer3_Init()?"); - - if (!bd->FontTexture) - ImGui_ImplSDLRenderer3_CreateDeviceObjects(); -} - -void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer* renderer) -{ - // If there's a scale factor set by the user, use that instead - // If the user has specified a scale factor to SDL_Renderer already via SDL_RenderSetScale(), SDL will scale whatever we pass - // to SDL_RenderGeometryRaw() by that scale factor. In that case we don't want to be also scaling it ourselves here. - float rsx = 1.0f; - float rsy = 1.0f; - SDL_GetRenderScale(renderer, &rsx, &rsy); - ImVec2 render_scale; - render_scale.x = (rsx == 1.0f) ? draw_data->FramebufferScale.x : 1.0f; - render_scale.y = (rsy == 1.0f) ? draw_data->FramebufferScale.y : 1.0f; - - // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates) - int fb_width = (int)(draw_data->DisplaySize.x * render_scale.x); - int fb_height = (int)(draw_data->DisplaySize.y * render_scale.y); - if (fb_width == 0 || fb_height == 0) - return; - - // Backup SDL_Renderer state that will be modified to restore it afterwards - struct BackupSDLRendererState - { - SDL_Rect Viewport; - bool ViewportEnabled; - bool ClipEnabled; - SDL_Rect ClipRect; - }; - BackupSDLRendererState old = {}; - old.ViewportEnabled = SDL_RenderViewportSet(renderer) == SDL_TRUE; - old.ClipEnabled = SDL_RenderClipEnabled(renderer) == SDL_TRUE; - SDL_GetRenderViewport(renderer, &old.Viewport); - SDL_GetRenderClipRect(renderer, &old.ClipRect); - - // Will project scissor/clipping rectangles into framebuffer space - ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports - ImVec2 clip_scale = render_scale; - - // Render command lists - ImGui_ImplSDLRenderer3_SetupRenderState(renderer); - for (int n = 0; n < draw_data->CmdListsCount; n++) - { - const ImDrawList* cmd_list = draw_data->CmdLists[n]; - const ImDrawVert* vtx_buffer = cmd_list->VtxBuffer.Data; - const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data; - - for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++) - { - const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i]; - if (pcmd->UserCallback) - { - // User callback, registered via ImDrawList::AddCallback() - // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.) - if (pcmd->UserCallback == ImDrawCallback_ResetRenderState) - ImGui_ImplSDLRenderer3_SetupRenderState(renderer); - else - pcmd->UserCallback(cmd_list, pcmd); - } - else - { - // Project scissor/clipping rectangles into framebuffer space - ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y); - ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y); - if (clip_min.x < 0.0f) { clip_min.x = 0.0f; } - if (clip_min.y < 0.0f) { clip_min.y = 0.0f; } - if (clip_max.x > (float)fb_width) { clip_max.x = (float)fb_width; } - if (clip_max.y > (float)fb_height) { clip_max.y = (float)fb_height; } - if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y) - continue; - - SDL_Rect r = { (int)(clip_min.x), (int)(clip_min.y), (int)(clip_max.x - clip_min.x), (int)(clip_max.y - clip_min.y) }; - SDL_SetRenderClipRect(renderer, &r); - - const float* xy = (const float*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, pos)); - const float* uv = (const float*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, uv)); - const SDL_Color* color = (const SDL_Color*)(const void*)((const char*)(vtx_buffer + pcmd->VtxOffset) + offsetof(ImDrawVert, col)); // SDL 2.0.19+ - - // Bind texture, Draw - SDL_Texture* tex = (SDL_Texture*)pcmd->GetTexID(); - SDL_RenderGeometryRaw(renderer, tex, - xy, (int)sizeof(ImDrawVert), - color, (int)sizeof(ImDrawVert), - uv, (int)sizeof(ImDrawVert), - cmd_list->VtxBuffer.Size - pcmd->VtxOffset, - idx_buffer + pcmd->IdxOffset, pcmd->ElemCount, sizeof(ImDrawIdx)); - } - } - } - - // Restore modified SDL_Renderer state - SDL_SetRenderViewport(renderer, old.ViewportEnabled ? &old.Viewport : nullptr); - SDL_SetRenderClipRect(renderer, old.ClipEnabled ? &old.ClipRect : nullptr); -} - -// Called by Init/NewFrame/Shutdown -bool ImGui_ImplSDLRenderer3_CreateFontsTexture() -{ - ImGuiIO& io = ImGui::GetIO(); - ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData(); - - // Build texture atlas - unsigned char* pixels; - int width, height; - io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory. - - // Upload texture to graphics system - // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling) - bd->FontTexture = SDL_CreateTexture(bd->Renderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STATIC, width, height); - if (bd->FontTexture == nullptr) - { - SDL_Log("error creating texture"); - return false; - } - SDL_UpdateTexture(bd->FontTexture, nullptr, pixels, 4 * width); - SDL_SetTextureBlendMode(bd->FontTexture, SDL_BLENDMODE_BLEND); - SDL_SetTextureScaleMode(bd->FontTexture, SDL_SCALEMODE_LINEAR); - - // Store our identifier - io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture); - - return true; -} - -void ImGui_ImplSDLRenderer3_DestroyFontsTexture() -{ - ImGuiIO& io = ImGui::GetIO(); - ImGui_ImplSDLRenderer3_Data* bd = ImGui_ImplSDLRenderer3_GetBackendData(); - if (bd->FontTexture) - { - io.Fonts->SetTexID(0); - SDL_DestroyTexture(bd->FontTexture); - bd->FontTexture = nullptr; - } -} - -bool ImGui_ImplSDLRenderer3_CreateDeviceObjects() -{ - return ImGui_ImplSDLRenderer3_CreateFontsTexture(); -} - -void ImGui_ImplSDLRenderer3_DestroyDeviceObjects() -{ - ImGui_ImplSDLRenderer3_DestroyFontsTexture(); -} - -//----------------------------------------------------------------------------- - -#if defined(__clang__) -#pragma clang diagnostic pop -#endif - -#endif // #ifndef IMGUI_DISABLE |