/*
* Create a window
*/
Window* S2D_CreateWindow(const char *title, int width, int height,
Update update, Render render, int flags) {
// Allocate window and set default values
Window *window = (Window*)malloc(sizeof(Window));
window->title = title;
window->width = width;
window->height = height;
window->fps_cap = 60;
window->vsync = true;
window->update = update;
window->render = render;
window->on_key = NULL;
window->on_key_down = NULL;
window->on_mouse = NULL;
window->on_controller = NULL;
window->background.r = 0.0;
window->background.g = 0.0;
window->background.b = 0.0;
window->background.a = 1.0;
// SDL Initialization ////////////////////////////////////////////////////////
// Initialize SDL
if (SDL_Init(SDL_INIT_EVERYTHING) != 0) S2D_Error("SDL_Init", SDL_GetError());
// Initialize SDL_ttf
if (TTF_Init() != 0) {
S2D_Error("TTF_Init", TTF_GetError());
free(window);
return NULL;
}
// Initialize SDL_mixer
int mix_flags = MIX_INIT_FLAC|MIX_INIT_OGG|MIX_INIT_MP3;
int mix_initted = Mix_Init(mix_flags);
if ((mix_initted&mix_flags) != mix_flags) {
S2D_Error("Mix_Init", Mix_GetError());
}
int audio_rate = 44100;
Uint16 audio_format = AUDIO_S16SYS;
int audio_channels = 2;
int audio_buffers = 4096;
if (Mix_OpenAudio(audio_rate, MIX_DEFAULT_FORMAT, audio_channels, audio_buffers) != 0) {
S2D_Error("Mix_OpenAudio", Mix_GetError());
free(window);
return NULL;
}
// Create SDL window
window->sdl = SDL_CreateWindow(
window->title, // title
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, // window position
window->width, window->height, // window size
SDL_WINDOW_OPENGL | flags // flags
);
if (!window->sdl) S2D_Error("SDL_CreateWindow", SDL_GetError());
// Window created by SDL might not actually be the requested size.
// If not, retrieve and set the actual window size.
window->s_width = window->width;
window->s_height = window->height;
SDL_GetWindowSize(window->sdl, &window->width, &window->height);
if ((window->width != window->s_width) ||
(window->height != window->s_height)) {
sprintf(S2D_msg,
"Resolution %dx%d unsupported by driver, scaling to %dx%d",
window->s_width, window->s_height, window->width, window->height);
S2D_Log(S2D_msg, S2D_WARN);
}
// Init OpenGL / GLES ////////////////////////////////////////////////////////
// Specify the OpenGL Context
#if !GLES
if (FORCE_GL2) {
// Use legacy OpenGL 2.1
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
} else {
// Request an OpenGL 3.3 forward-compatible core profile
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
}
#endif
// Create and store the OpenGL context
if (FORCE_GL2) {
window->glcontext = NULL;
} else {
// Ask SDL to create an OpenGL context
window->glcontext = SDL_GL_CreateContext(window->sdl);
}
// Check if a valid OpenGL context was created
if (window->glcontext) {
// Valid context found
#if GLES
// Initialize OpenGL ES 2.0
gles_init(window->width, window->height, window->s_width, window->s_height);
#else
// Initialize OpenGL 3.3+
gl3_init(window->width, window->height);
#endif
} else {
// Context could not be created
#if GLES
S2D_Error("GLES / SDL_GL_CreateContext", SDL_GetError());
#else
// Try to fallback using an OpenGL 2.1 context
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
// Try creating the context again
window->glcontext = SDL_GL_CreateContext(window->sdl);
// Check if this context was created
if (window->glcontext) {
// Valid context found
S2D_GL2 = true;
gl2_init(window->width, window->height);
} else {
// Could not create any OpenGL contexts, hard failure
S2D_Error("GL2 / SDL_GL_CreateContext", SDL_GetError());
S2D_Log("An OpenGL context could not be created", S2D_ERROR);
free(window);
return NULL;
}
#endif
}
// Store the context and print it if diagnostics is enabled
S2D_GL_StoreContextInfo(window);
if (diagnostics) S2D_GL_PrintContextInfo(window);
return window;
}
/*
* Initialize OpenGL
*/
int S2D_GL_Init(S2D_Window *window) {
// Specify OpenGL contexts and set attributes
#if GLES
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
#else
// Use legacy OpenGL 2.1
if (FORCE_GL2) {
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
// Request an OpenGL 3.3 forward-compatible core profile
} else {
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
}
#endif
// Create and store the OpenGL context
if (FORCE_GL2) {
window->glcontext = NULL;
} else {
// Ask SDL to create an OpenGL context
window->glcontext = SDL_GL_CreateContext(window->sdl);
}
// Check if a valid OpenGL context was created
if (window->glcontext) {
// Valid context found
// Initialize OpenGL ES 2.0
#if GLES
S2D_GLES_Init();
S2D_GL_SetViewport(window);
// Initialize OpenGL 3.3+
#else
// Initialize GLEW on Windows
#if WINDOWS
GLenum err = glewInit();
if (GLEW_OK != err) S2D_Error("GLEW", glewGetErrorString(err));
#endif
S2D_GL3_Init();
S2D_GL_SetViewport(window);
#endif
// Context could not be created
} else {
#if GLES
S2D_Error("GLES / SDL_GL_CreateContext", SDL_GetError());
#else
// Try to fallback using an OpenGL 2.1 context
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
// Try creating the context again
window->glcontext = SDL_GL_CreateContext(window->sdl);
// Check if this context was created
if (window->glcontext) {
// Valid context found
S2D_GL2 = true;
S2D_GL2_Init();
S2D_GL_SetViewport(window);
// Could not create any OpenGL contexts, hard failure
} else {
S2D_Error("GL2 / SDL_GL_CreateContext", SDL_GetError());
S2D_Log(S2D_ERROR, "An OpenGL context could not be created");
return -1;
}
#endif
}
// Store the context and print it if diagnostics is enabled
S2D_GL_StoreContextInfo(window);
if (S2D_diagnostics) S2D_GL_PrintContextInfo(window);
return 0;
}
