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#ifdef BUILD_RASPI
 32	mRPIGLCommonInit(renderer);
 33#else
 34	mSDLGLCommonInit(renderer);
 35#endif
 36
 37	size_t size = renderer->width * renderer->height * BYTES_PER_PIXEL;
 38#ifdef _WIN32
 39	renderer->outputBuffer = _aligned_malloc(size, 16);
 40#elif defined(__linux__)
 41	renderer->outputBuffer = memalign(16, size);
 42#else
 43	posix_memalign((void**) &renderer->outputBuffer, 16, size);
 44#endif
 45	memset(renderer->outputBuffer, 0, size);
 46	renderer->core->setVideoBuffer(renderer->core, renderer->outputBuffer, renderer->width);
 47
 48	mGLES2ContextCreate(&renderer->gl2);
 49	renderer->gl2.d.user = renderer;
 50	renderer->gl2.d.lockAspectRatio = renderer->lockAspectRatio;
 51	renderer->gl2.d.lockIntegerScaling = renderer->lockIntegerScaling;
 52	renderer->gl2.d.filter = renderer->filter;
 53#ifdef BUILD_RASPI
 54	renderer->gl2.d.swap = mRPIGLCommonSwap;
 55#else
 56	renderer->gl2.d.swap = mSDLGLCommonSwap;
 57#endif
 58	renderer->gl2.d.init(&renderer->gl2.d, 0);
 59	renderer->gl2.d.setDimensions(&renderer->gl2.d, renderer->width, renderer->height);
 60
 61	mSDLGLDoViewport(renderer->viewportWidth, renderer->viewportHeight, &renderer->gl2.d);
 62	return true;
 63}
 64
 65void mSDLGLES2Runloop(struct mSDLRenderer* renderer, void* user) {
 66	struct mCoreThread* context = user;
 67	SDL_Event event;
 68	struct VideoBackend* v = &renderer->gl2.d;
 69
 70	while (mCoreThreadIsActive(context)) {
 71		while (SDL_PollEvent(&event)) {
 72			mSDLHandleEvent(context, &renderer->player, &event);
 73			// Event handling can change the size of the screen
 74			if (renderer->player.windowUpdated) {
 75#if SDL_VERSION_ATLEAST(2, 0, 0)
 76				SDL_GetWindowSize(renderer->window, &renderer->viewportWidth, &renderer->viewportHeight);
 77#else
 78				renderer->viewportWidth = renderer->player.newWidth;
 79				renderer->viewportHeight = renderer->player.newHeight;
 80				mSDLGLCommonInit(renderer);
 81#endif
 82				mSDLGLDoViewport(renderer->viewportWidth, renderer->viewportHeight, v);
 83				renderer->player.windowUpdated = 0;
 84			}
 85		}
 86
 87		if (mCoreSyncWaitFrameStart(&context->impl->sync)) {
 88			v->postFrame(v, renderer->outputBuffer);
 89		}
 90		mCoreSyncWaitFrameEnd(&context->impl->sync);
 91		v->drawFrame(v);
 92		v->swap(v);
 93	}
 94}
 95
 96void mSDLGLES2Deinit(struct mSDLRenderer* renderer) {
 97	if (renderer->gl2.d.deinit) {
 98		renderer->gl2.d.deinit(&renderer->gl2.d);
 99	}
100#ifdef BUILD_RASPI
101	eglMakeCurrent(renderer->eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
102	eglDestroySurface(renderer->eglDisplay, renderer->eglSurface);
103	eglDestroyContext(renderer->eglDisplay, renderer->eglContext);
104	eglTerminate(renderer->eglDisplay);
105	bcm_host_deinit();
106#elif SDL_VERSION_ATLEAST(2, 0, 0)
107	SDL_GL_DeleteContext(renderer->glCtx);
108#endif
109	free(renderer->outputBuffer);
110}