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Backends: Start adding sdl2 surface

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This commit is contained in:
moonpower 2025-12-24 23:17:37 +03:00
parent 922a11f084
commit f2703c1015
4 changed files with 365 additions and 0 deletions
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95
examples/example_sdl2_surface/main.cpp Normal file
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// main.cpp
// Example program using imgui_impl_sdlsurface2 backend
#include "imgui.h"
#include "imgui_impl_sdl2.h"
#include "imgui_impl_sdlsurface2.h"
#include <SDL.h>
#include <stdio.h>
int main(int, char**)
{
if (SDL_Init(SDL_INIT_VIDEO) != 0)
{
printf("Error: %s\n", SDL_GetError());
return -1;
}
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Surface Example",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
1280, 720, SDL_WINDOW_SHOWN);
if (!window)
{
printf("Error creating window: %s\n", SDL_GetError());
return -1;
}
SDL_Surface* window_surface = SDL_GetWindowSurface(window);
if (!window_surface)
{
printf("Error getting window surface: %s\n", SDL_GetError());
return -1;
}
SDL_Surface* framebuffer = SDL_CreateRGBSurfaceWithFormat(0, 1280, 720, 32, SDL_PIXELFORMAT_RGBA32);
if (!framebuffer)
{
printf("Error creating framebuffer: %s\n", SDL_GetError());
return -1;
}
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
ImGui::StyleColorsDark();
ImGui_ImplSDL2_InitForSDLRenderer(window, nullptr);
ImGui_ImplSDLSurface2_Init(framebuffer);
bool show_demo_window = true;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
bool done = false;
while (!done)
{
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
done = true;
}
ImGui_ImplSDLSurface2_NewFrame();
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
if (show_demo_window)
ImGui::ShowDemoWindow(&show_demo_window);
ImGui::Render();
SDL_FillRect(framebuffer, nullptr, SDL_MapRGB(framebuffer->format,
(Uint8)(clear_color.x * 255),
(Uint8)(clear_color.y * 255),
(Uint8)(clear_color.z * 255)));
ImGui_ImplSDLSurface2_RenderDrawData(ImGui::GetDrawData());
SDL_BlitSurface(framebuffer, nullptr, window_surface, nullptr);
SDL_UpdateWindowSurface(window);
}
ImGui_ImplSDLSurface2_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_FreeSurface(framebuffer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}