Added OpenGL boilerplate

1 files changed, 24 insertions, 53 deletions

diff --git a/src/state.c b/src/state.c
index 395d590..b2ea45c 100644
--- a/src/state.c
+++ b/src/state.c
@@ -4,25 +4,32 @@
 bool	state_init(State *state)
 {
     SDL_CALL(SDL_Init(SDL_INIT_VIDEO));
+	SDL_CALL(SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4));
+	SDL_CALL(SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0));
+	SDL_CALL(SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE));
+	SDL_CALL(SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1));
     SDL_CALL(state->window = SDL_CreateWindow(
 		MANDEL_WINDOW_TITLE,
 		SDL_WINDOWPOS_UNDEFINED,
 		SDL_WINDOWPOS_UNDEFINED,
 		MANDEL_WINDOW_WIDTH,
 		MANDEL_WINDOW_HEIGHT,
-		SDL_WINDOW_RESIZABLE
+		SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
 	));
-    SDL_CALL(state->renderer = SDL_CreateRenderer(state->window, -1, 0));
-	SDL_CALL(state->texture = SDL_CreateTexture(
-		state->renderer,
-		SDL_PIXELFORMAT_RGB888,
-		SDL_TEXTUREACCESS_STREAMING,
-		MANDEL_WINDOW_WIDTH,
-		MANDEL_WINDOW_HEIGHT
-	));
-	state->palette = color_palette_new(NULL, MANDEL_ITERATIONS);
-	if (state->palette == NULL)
+	SDL_CALL(state->context = SDL_GL_CreateContext(state->window));
+	assert(glewInit() == GLEW_OK);
+	SDL_CALL(SDL_GL_SetSwapInterval(1));
+	if (!shader_init(&state->shader))
+	{
+		perror(NULL);
 		return false;
+	}
+	SDL_GL_GetDrawableSize(state->window, &state->width, &state->height);
+	GL_CALL(glViewport(0, 0, state->width, state->height));
+
+	/* state->palette = color_palette_new(NULL, MANDEL_ITERATIONS); */
+	/* if (state->palette == NULL) */
+	/* 	return false; */
 	state->iterations = MANDEL_ITERATIONS;
 	state->real_start = -2.0;
 	state->real_end = 2.0;
@@ -37,55 +44,19 @@ void	state_run(State *state)
     while (state->running)
     {
         event_handle(state);
+		glClearColor(0.2, 0.3, 0.2, 1.0);
+		glClear(GL_COLOR_BUFFER_BIT);
 
-		double	real_step;
-		double	imag_step;
-		double	real;
-		double	imag;
-		void	*pixels;
-		int		pitch;
-		int		width;
-		int		height;
-
-		SDL_CALL(SDL_LockTexture(state->texture, NULL, &pixels, &pitch));
-		SDL_CALL(SDL_QueryTexture(state->texture, NULL, NULL, &width, &height));
-
-		real_step = (state->real_end - state->real_start) / width;
-		imag_step = (state->imag_end - state->imag_start) / height;
-		imag = state->imag_start;
-
-		uint32_t render_start_time = SDL_GetTicks();
-
-		for (int i = 0; i < height; i++)
-		{
-			real = state->real_start;
-			for (int j = 0; j < width; j++)
-			{
-				int n = mandelbrot(real, imag, state->iterations);
-				Color c = state->palette[n];
-				((Color*)pixels)[i * width + j] = c;
-				real += real_step;
-			}
-			imag += imag_step;
-		}
-
-		uint32_t render_end_time = SDL_GetTicks();
-
-		printf("%ums\r", (render_end_time - render_start_time));
-		fflush(stdout);
-
-		SDL_UnlockTexture(state->texture);
-		SDL_CALL(SDL_RenderCopy(state->renderer, state->texture, NULL, NULL));
-		SDL_RenderPresent(state->renderer);
+		SDL_GL_SwapWindow(state->window);
 		SDL_Delay(3);
     }
 }
 
 void	state_quit(State *state)
 {
-    free(state->palette);
-	SDL_DestroyTexture(state->texture);
-    SDL_DestroyRenderer(state->renderer);
+    /* free(state->palette); */
+	GL_CALL(glDeleteProgram(state->shader.id));
+	SDL_GL_DeleteContext(state->context);
     SDL_DestroyWindow(state->window);
 	SDL_Quit();
 }