1/* Copyright (c) 2013-2016 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#ifdef BUILD_RASPI
 10#include "rpi-common.h"
 11#endif
 12
 13#include <mgba/core/core.h>
 14#include <mgba/core/thread.h>
 15
 16#ifdef __linux__
 17#include <malloc.h>
 18#endif
 19
 20static bool mSDLGLES2Init(struct mSDLRenderer* renderer);
 21static void mSDLGLES2Runloop(struct mSDLRenderer* renderer, void* user);
 22static void mSDLGLES2Deinit(struct mSDLRenderer* renderer);
 23
 24void mSDLGLES2Create(struct mSDLRenderer* renderer) {
 25	renderer->init = mSDLGLES2Init;
 26	renderer->deinit = mSDLGLES2Deinit;
 27	renderer->runloop = mSDLGLES2Runloop;
 28}
 29
 30bool mSDLGLES2Init(struct mSDLRenderer* renderer) {
 31	size_t size = renderer->width * renderer->height * BYTES_PER_PIXEL;
 32#ifdef _WIN32
 33	renderer->outputBuffer = _aligned_malloc(size, 16);
 34#elif defined(__linux__)
 35	renderer->outputBuffer = memalign(16, size);
 36#else
 37	posix_memalign((void**) &renderer->outputBuffer, 16, size);
 38#endif
 39	memset(renderer->outputBuffer, 0, size);
 40	renderer->core->setVideoBuffer(renderer->core, renderer->outputBuffer, renderer->width);
 41
 42	mGLES2ContextCreate(&renderer->gl2);
 43	renderer->gl2.d.user = renderer;
 44	renderer->gl2.d.lockAspectRatio = renderer->lockAspectRatio;
 45	renderer->gl2.d.lockIntegerScaling = renderer->lockIntegerScaling;
 46	renderer->gl2.d.filter = renderer->filter;
 47#ifdef BUILD_RASPI
 48	renderer->gl2.d.swap = mRPIGLCommonSwap;
 49#else
 50	renderer->gl2.d.swap = mSDLGLCommonSwap;
 51#endif
 52	renderer->gl2.d.init(&renderer->gl2.d, 0);
 53	renderer->gl2.d.setDimensions(&renderer->gl2.d, renderer->width, renderer->height);
 54
 55	mSDLGLDoViewport(renderer->viewportWidth, renderer->viewportHeight, &renderer->gl2.d);
 56	return true;
 57}
 58
 59void mSDLGLES2Runloop(struct mSDLRenderer* renderer, void* user) {
 60	struct mCoreThread* context = user;
 61	SDL_Event event;
 62	struct VideoBackend* v = &renderer->gl2.d;
 63
 64	while (mCoreThreadIsActive(context)) {
 65		while (SDL_PollEvent(&event)) {
 66			mSDLHandleEvent(context, &renderer->player, &event);
 67			// Event handling can change the size of the screen
 68			if (renderer->player.windowUpdated) {
 69#if SDL_VERSION_ATLEAST(2, 0, 0)
 70				SDL_GetWindowSize(renderer->window, &renderer->viewportWidth, &renderer->viewportHeight);
 71#else
 72				renderer->viewportWidth = renderer->player.newWidth;
 73				renderer->viewportHeight = renderer->player.newHeight;
 74				mSDLGLCommonInit(renderer);
 75#endif
 76				mSDLGLDoViewport(renderer->viewportWidth, renderer->viewportHeight, v);
 77				renderer->player.windowUpdated = 0;
 78			}
 79		}
 80
 81		if (mCoreSyncWaitFrameStart(&context->impl->sync)) {
 82			v->postFrame(v, renderer->outputBuffer);
 83		}
 84		mCoreSyncWaitFrameEnd(&context->impl->sync);
 85		v->drawFrame(v);
 86		v->swap(v);
 87	}
 88}
 89
 90void mSDLGLES2Deinit(struct mSDLRenderer* renderer) {
 91	if (renderer->gl2.d.deinit) {
 92		renderer->gl2.d.deinit(&renderer->gl2.d);
 93	}
 94#ifdef BUILD_RASPI
 95	eglMakeCurrent(renderer->eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 96	eglDestroySurface(renderer->eglDisplay, renderer->eglSurface);
 97	eglDestroyContext(renderer->eglDisplay, renderer->eglContext);
 98	eglTerminate(renderer->eglDisplay);
 99	bcm_host_deinit();
100#elif SDL_VERSION_ATLEAST(2, 0, 0)
101	SDL_GL_DeleteContext(renderer->glCtx);
102#endif
103	free(renderer->outputBuffer);
104}