1/* Copyright (c) 2013-2015 Jeffrey Pfau
 2 *
 3 * This Source Code Form is subject to the terms of the Mozilla Public
 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 6#include "main.h"
 7
 8#include "gl-common.h"
 9
10#include <mgba/core/core.h>
11#include <mgba/core/thread.h>
12#include "platform/opengl/gl.h"
13
14static bool mSDLGLInit(struct mSDLRenderer* renderer);
15static void mSDLGLRunloop(struct mSDLRenderer* renderer, void* user);
16static void mSDLGLDeinit(struct mSDLRenderer* renderer);
17
18void mSDLGLCreate(struct mSDLRenderer* renderer) {
19	renderer->init = mSDLGLInit;
20	renderer->deinit = mSDLGLDeinit;
21	renderer->runloop = mSDLGLRunloop;
22}
23
24bool mSDLGLInit(struct mSDLRenderer* renderer) {
25	mSDLGLCommonInit(renderer);
26
27	renderer->outputBuffer = malloc(renderer->width * renderer->height * BYTES_PER_PIXEL);
28	memset(renderer->outputBuffer, 0, renderer->width * renderer->height * BYTES_PER_PIXEL);
29	renderer->core->setVideoBuffer(renderer->core, renderer->outputBuffer, renderer->width);
30
31	mGLContextCreate(&renderer->gl);
32	renderer->gl.d.user = renderer;
33	renderer->gl.d.lockAspectRatio = renderer->lockAspectRatio;
34	renderer->gl.d.lockIntegerScaling = renderer->lockIntegerScaling;
35	renderer->gl.d.filter = renderer->filter;
36	renderer->gl.d.swap = mSDLGLCommonSwap;
37	renderer->gl.d.init(&renderer->gl.d, 0);
38	renderer->gl.d.setDimensions(&renderer->gl.d, renderer->width, renderer->height);
39
40	mSDLGLDoViewport(renderer->viewportWidth, renderer->viewportHeight, &renderer->gl.d);
41	return true;
42}
43
44void mSDLGLRunloop(struct mSDLRenderer* renderer, void* user) {
45	struct mCoreThread* context = user;
46	SDL_Event event;
47	struct VideoBackend* v = &renderer->gl.d;
48
49	while (context->state < THREAD_EXITING) {
50		while (SDL_PollEvent(&event)) {
51			mSDLHandleEvent(context, &renderer->player, &event);
52#if SDL_VERSION_ATLEAST(2, 0, 0)
53			// Event handling can change the size of the screen
54			if (renderer->player.windowUpdated) {
55				SDL_GetWindowSize(renderer->window, &renderer->viewportWidth, &renderer->viewportHeight);
56				mSDLGLDoViewport(renderer->viewportWidth, renderer->viewportHeight, v);
57				renderer->player.windowUpdated = 0;
58			}
59#endif
60		}
61
62		if (mCoreSyncWaitFrameStart(&context->sync)) {
63			v->postFrame(v, renderer->outputBuffer);
64		}
65		mCoreSyncWaitFrameEnd(&context->sync);
66		v->drawFrame(v);
67		v->swap(v);
68	}
69}
70
71void mSDLGLDeinit(struct mSDLRenderer* renderer) {
72	if (renderer->gl.d.deinit) {
73		renderer->gl.d.deinit(&renderer->gl.d);
74	}
75	free(renderer->outputBuffer);
76#if SDL_VERSION_ATLEAST(2, 0, 0)
77	SDL_GL_DeleteContext(renderer->glCtx);
78#endif
79}