113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
#include "../OpenGL.h"
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#include <stddef.h>
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#include <string>
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#ifndef USE_OPENGLES2
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#include <glad/glad.h>
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#endif
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#include "SDL.h"
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#include "../../../Misc.h"
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#include "../../../Shared/SDL.h"
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SDL_Window *window;
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static SDL_GLContext context;
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bool WindowBackend_OpenGL_CreateWindow(const char *window_title, size_t *screen_width, size_t *screen_height, bool fullscreen)
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{
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#ifdef USE_OPENGLES2
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES) < 0)
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Backend_PrintError("Couldn't set OpenGL context type to ES: %s", SDL_GetError());
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0) < 0)
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Backend_PrintError("Couldn't set OpenGL context flags to 0: %s", SDL_GetError());
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2) < 0)
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Backend_PrintError("Couldn't set OpenGL major version to 2: %s", SDL_GetError());
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0) < 0)
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Backend_PrintError("Couldn't set OpenGL minor version to 0: %s", SDL_GetError());
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#else
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE) < 0)
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Backend_PrintError("Couldn't set OpenGL context type to core: %s", SDL_GetError());
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG) < 0)
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Backend_PrintError("Couldn't set OpenGL forward compatibility: %s", SDL_GetError());
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3) < 0)
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Backend_PrintError("Couldn't set OpenGL major version to 3: %s", SDL_GetError());
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if (SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2) < 0)
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Backend_PrintError("Couldn't set OpenGL minor verison to 2: %s", SDL_GetError());
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#endif
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window = SDL_CreateWindow(window_title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, *screen_width, *screen_height, SDL_WINDOW_RESIZABLE | SDL_WINDOW_OPENGL | (fullscreen ? SDL_WINDOW_FULLSCREEN : 0));
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if (window != NULL)
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{
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context = SDL_GL_CreateContext(window);
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if (context != NULL)
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{
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if (SDL_GL_MakeCurrent(window, context) == 0)
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{
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#ifndef USE_OPENGLES2
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if (gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress))
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{
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// Check if the platform supports OpenGL 3.2
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if (GLAD_GL_VERSION_3_2)
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{
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#endif
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Backend_PostWindowCreation();
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return true;
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#ifndef USE_OPENGLES2
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}
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else
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{
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Backend_ShowMessageBox("Fatal error (OpenGL rendering backend)", "Your system does not support OpenGL 3.2");
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}
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}
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else
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{
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Backend_ShowMessageBox("Fatal error (OpenGL rendering backend)", "Couldn't load OpenGL functions");
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}
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#endif
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}
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else
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{
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std::string error_message = std::string("Couldn't setup OpenGL context for rendering: ") + SDL_GetError();
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Backend_ShowMessageBox("Fatal error (OpenGL rendering backend)", "SDL_GL_MakeCurrent failed");
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}
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SDL_GL_DeleteContext(context);
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}
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else
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{
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std::string error_message = std::string("Couldn't create OpenGL context: %s", SDL_GetError());
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Backend_ShowMessageBox("Fatal error (OpenGL rendering backend)", "Could not create OpenGL context");
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}
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SDL_DestroyWindow(window);
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}
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else
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{
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std::string error_message = std::string("Could not create window: ") + SDL_GetError();
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Backend_ShowMessageBox("Fatal error (OpenGL rendering backend)", error_message.c_str());
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}
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return false;
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}
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void WindowBackend_OpenGL_DestroyWindow(void)
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{
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SDL_GL_DeleteContext(context);
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SDL_DestroyWindow(window);
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}
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void WindowBackend_OpenGL_Display(void)
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{
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SDL_GL_SwapWindow(window);
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}
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