1#include <SDL2/SDL.h>
  2
  3#include "util.h"
  4#include "platform/platform.h"
  5
  6void platform_get_drawable_size(MGContext* ctx, i32* width, i32* height)
  7{
  8#ifdef MG_RENDERER_SMALL3DLIB
  9	SDL_GetWindowSize(ctx->win, width, height);
 10#else
 11	SDL_GL_GetDrawableSize(ctx->win, width, height);
 12#endif
 13}
 14
 15void platform_init(MGContext* ctx)
 16{
 17	(void)ctx;
 18	if (SDL_Init(SDL_INIT_VIDEO) != 0)
 19		mg_die(MG_ERR_SDL_INIT, "SDL_Init failed: %s", SDL_GetError());
 20
 21#ifdef MG_RENDERER_SOKOL
 22	/* TODO: OpenGL specifis */
 23	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
 24	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
 25	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
 26	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 27	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
 28#endif
 29}
 30
 31/* TODO: platform independant design MGEvent, MGPoll */
 32i32 platform_poll(MGContext* ctx)
 33{
 34	SDL_Event ev;
 35	while (SDL_PollEvent(&ev)) {
 36		switch (ev.type) {
 37		case SDL_QUIT:
 38			return 0;
 39
 40		case SDL_WINDOWEVENT:
 41			if (ev.window.event == SDL_WINDOWEVENT_SIZE_CHANGED) { /* resize */
 42				ctx->width = ev.window.data1;
 43				ctx->height = ev.window.data2;
 44			}
 45		}
 46	}
 47
 48	return 1;
 49}
 50
 51void platform_present(MGContext* ctx)
 52{
 53#ifdef MG_RENDERER_SMALL3DLIB
 54	SDL_RenderPresent(ctx->vbe.renderer);
 55#else
 56	SDL_GL_SwapWindow(ctx->win);
 57#endif
 58}
 59
 60void platform_shutdown(MGContext* ctx)
 61{
 62	if (!ctx)
 63		return;
 64
 65#ifdef MG_RENDERER_SMALL3DLIB
 66	if (ctx->vbe.renderer) {
 67		SDL_DestroyRenderer(ctx->vbe.renderer);
 68		ctx->vbe.renderer = NULL;
 69	}
 70#endif
 71
 72#ifdef MG_RENDERER_SOKOL
 73	if (ctx->vbe.gl) {
 74		SDL_GL_DeleteContext(ctx->vbe.gl);
 75		ctx->vbe.gl = NULL;
 76	}
 77#endif
 78
 79	if (ctx->win) {
 80		SDL_DestroyWindow(ctx->win);
 81		ctx->win = NULL;
 82	}
 83
 84	SDL_Quit();
 85}
 86
 87void platform_window_create(MGContext* ctx)
 88{
 89	u32 flags = SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI;
 90#ifdef MG_RENDERER_SOKOL
 91	flags |= SDL_WINDOW_OPENGL;
 92#endif
 93
 94	ctx->win = SDL_CreateWindow(ctx->title, ctx->x, ctx->y, ctx->width, ctx->height, flags);
 95
 96	if (!ctx->win)
 97		mg_die(MG_ERR_SDL_CREATE_WIN, "Failed to create window: %s", SDL_GetError());
 98
 99#ifdef MG_RENDERER_SMALL3DLIB
100	ctx->vbe.renderer = SDL_CreateRenderer(ctx->win, -1, SDL_RENDERER_ACCELERATED);
101	if (!ctx->vbe.renderer)
102		ctx->vbe.renderer = SDL_CreateRenderer(ctx->win, -1, SDL_RENDERER_SOFTWARE);
103	if (!ctx->vbe.renderer)
104		mg_die(MG_ERR_REN_CREATE, "Failed to create SDL renderer: %s", SDL_GetError());
105#endif
106
107#ifdef MG_RENDERER_SOKOL
108	ctx->vbe.gl = SDL_GL_CreateContext(ctx->win);
109	if (!ctx->vbe.gl)
110		mg_die(MG_ERR_GL_CTX_CREATE, "Failed to initialise GL Context");
111
112	if (SDL_GL_MakeCurrent(ctx->win, ctx->vbe.gl) != 0)
113		mg_die(MG_ERR_GL_CTX_ACTIVATE, "Failed to activate GL Context: %s", SDL_GetError());
114
115	SDL_GL_SetSwapInterval(1);
116#endif
117}