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Backends: SDL_Renderer: Amend 1d2d246, various tweaks, fixes, sync to latest. (#3926)

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ocornut
2021-09-21 19:29:39 +02:00
parent 62b17f928e
commit fba756176d
10 changed files with 123 additions and 121 deletions
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45
examples/example_sdl_sdlrenderer/main.cpp
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@@ -3,8 +3,9 @@
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
// See imgui_impl_sdl.cpp for details.
// (Requires: SDL 2.0.17+)
// Important to understand: SDL_Renderer is an _optional_ component of SDL. We do not recommend you use SDL_Renderer
// because it provide a rather limited API to the end-user. We provide this backend for the sake of completeness.
// For a multi-platform app consider using e.g. SDL+DirectX on Windows and SDL+OpenGL on Linux/OSX.
#include "imgui.h"
#include "imgui_impl_sdl.h"
@@ -12,8 +13,8 @@
#include <stdio.h>
#include <SDL.h>
#if SDL_MAJOR_VERSION < 2 || SDL_MINOR_VERSION < 0 || SDL_PATCHLEVEL < 17
# error Requires: SDL 2.0.17+ because of SDL_RenderGeometry function
#if !SDL_VERSION_ATLEAST(2,0,17)
#error This backend requires SDL 2.0.17+ because of SDL_RenderGeometry() function
#endif
// Main code
@@ -28,18 +29,20 @@ int main(int, char**)
return -1;
}
// SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengles2");
// SDL_SetHint(SDL_HINT_RENDER_DRIVER, "opengl");
// SDL_SetHint(SDL_HINT_RENDER_DRIVER, "software");
// Setup window
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+OpenGL example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+SDL_Renderer example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);
// Setup SDL_Renderer instance
SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED);
if (renderer == NULL)
{
SDL_Log("Error creating SDL_Renderer!");
return false;
}
//SDL_RendererInfo info;
//SDL_GetRendererInfo(renderer, &info);
//SDL_Log("Current SDL_Renderer: %s", info.name);
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
@@ -54,17 +57,6 @@ int main(int, char**)
// Setup Platform/Renderer backends
ImGui_ImplSDL2_InitForSDLRenderer(window);
SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED);
if (renderer == NULL) {
SDL_Log("Error creating SDL renderer");
return false;
} else {
SDL_RendererInfo info;
SDL_GetRendererInfo(renderer, &info);
SDL_Log("Current SDL Renderer: %s", info.name);
}
ImGui_ImplSDLRenderer_Init(renderer);
// Load Fonts
@@ -150,8 +142,9 @@ int main(int, char**)
// Rendering
ImGui::Render();
SDL_SetRenderDrawColor(renderer, (Uint8)(clear_color.x * 255), (Uint8)(clear_color.y * 255), (Uint8)(clear_color.z * 255), (Uint8)(clear_color.w * 255));
SDL_RenderClear(renderer);
ImGui_ImplSDLRenderer_RenderDrawData(ImGui::GetDrawData());
SDL_RenderPresent(renderer);
}