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 "core/core.h"
11#include "core/thread.h"
12#include "platform/opengl/gl.h"
13
14#define GB_GBA_CENTER ((VIDEO_HORIZONTAL_PIXELS - GB_VIDEO_HORIZONTAL_PIXELS + VIDEO_HORIZONTAL_PIXELS * (VIDEO_VERTICAL_PIXELS - GB_VIDEO_VERTICAL_PIXELS)) / 2)
15
16static void _doViewport(int w, int h, struct VideoBackend* v) {
17	v->resized(v, w, h);
18	v->clear(v);
19	v->swap(v);
20	v->clear(v);
21}
22
23static bool mSDLGLInit(struct mSDLRenderer* renderer);
24static void mSDLGLRunloop(struct mSDLRenderer* renderer, void* user);
25static void mSDLGLDeinit(struct mSDLRenderer* renderer);
26
27void mSDLGLCreate(struct mSDLRenderer* renderer) {
28	renderer->init = mSDLGLInit;
29	renderer->deinit = mSDLGLDeinit;
30	renderer->runloop = mSDLGLRunloop;
31}
32
33bool mSDLGLInit(struct mSDLRenderer* renderer) {
34	mSDLGLCommonInit(renderer);
35
36	renderer->outputBuffer = malloc(renderer->width * renderer->height * BYTES_PER_PIXEL);
37	memset(renderer->outputBuffer, 0, renderer->width * renderer->height * BYTES_PER_PIXEL);
38	renderer->core->setVideoBuffer(renderer->core, renderer->outputBuffer, renderer->width);
39
40	GBAGLContextCreate(&renderer->gl);
41	renderer->gl.d.user = renderer;
42	renderer->gl.d.lockAspectRatio = renderer->lockAspectRatio;
43	renderer->gl.d.filter = renderer->filter;
44	renderer->gl.d.swap = mSDLGLCommonSwap;
45	renderer->gl.d.init(&renderer->gl.d, 0);
46	renderer->gl.d.setDimensions(&renderer->gl.d, renderer->width, renderer->height);
47
48	_doViewport(renderer->viewportWidth, renderer->viewportHeight, &renderer->gl.d);
49	return true;
50}
51
52void mSDLGLRunloop(struct mSDLRenderer* renderer, void* user) {
53	struct mCoreThread* context = user;
54	SDL_Event event;
55	struct VideoBackend* v = &renderer->gl.d;
56
57	while (context->state < THREAD_EXITING) {
58		while (SDL_PollEvent(&event)) {
59			mSDLHandleEvent(context, &renderer->player, &event);
60#if SDL_VERSION_ATLEAST(2, 0, 0)
61			// Event handling can change the size of the screen
62			if (renderer->player.windowUpdated) {
63				SDL_GetWindowSize(renderer->window, &renderer->viewportWidth, &renderer->viewportHeight);
64				_doViewport(renderer->viewportWidth, renderer->viewportHeight, v);
65				renderer->player.windowUpdated = 0;
66			}
67#endif
68		}
69
70		if (mCoreSyncWaitFrameStart(&context->sync)) {
71			v->postFrame(v, renderer->outputBuffer);
72		}
73		mCoreSyncWaitFrameEnd(&context->sync);
74		v->drawFrame(v);
75		v->swap(v);
76	}
77}
78
79void mSDLGLDeinit(struct mSDLRenderer* renderer) {
80	if (renderer->gl.d.deinit) {
81		renderer->gl.d.deinit(&renderer->gl.d);
82	}
83	free(renderer->outputBuffer);
84#if SDL_VERSION_ATLEAST(2, 0, 0)
85	SDL_GL_DeleteContext(renderer->glCtx);
86#endif
87}