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
 10#include "core/thread.h"
 11
 12#ifndef __APPLE__
 13#include <malloc.h>
 14#endif
 15
 16static bool mSDLGLES2Init(struct mSDLRenderer* renderer);
 17static void mSDLGLES2Runloop(struct mSDLRenderer* renderer, void* user);
 18static void mSDLGLES2Deinit(struct mSDLRenderer* renderer);
 19
 20void mSDLGLES2Create(struct mSDLRenderer* renderer) {
 21	renderer->init = mSDLGLES2Init;
 22	renderer->deinit = mSDLGLES2Deinit;
 23	renderer->runloop = mSDLGLES2Runloop;
 24}
 25
 26bool mSDLGLES2Init(struct mSDLRenderer* renderer) {
 27#ifdef BUILD_RASPI
 28	bcm_host_init();
 29	renderer->display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 30	int major, minor;
 31	if (EGL_FALSE == eglInitialize(renderer->display, &major, &minor)) {
 32		printf("Failed to initialize EGL");
 33		return false;
 34	}
 35
 36	if (EGL_FALSE == eglBindAPI(EGL_OPENGL_ES_API)) {
 37		printf("Failed to get GLES API");
 38		return false;
 39	}
 40
 41	const EGLint requestConfig[] = {
 42		EGL_RED_SIZE, 5,
 43		EGL_GREEN_SIZE, 5,
 44		EGL_BLUE_SIZE, 5,
 45		EGL_ALPHA_SIZE, 1,
 46		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 47		EGL_NONE
 48	};
 49
 50	EGLConfig config;
 51	EGLint numConfigs;
 52
 53	if (EGL_FALSE == eglChooseConfig(renderer->display, requestConfig, &config, 1, &numConfigs)) {
 54		printf("Failed to choose EGL config\n");
 55		return false;
 56	}
 57
 58	const EGLint contextAttributes[] = {
 59		EGL_CONTEXT_CLIENT_VERSION, 2,
 60		EGL_NONE
 61	};
 62
 63	int dispWidth = 240, dispHeight = 160, adjWidth;
 64	renderer->context = eglCreateContext(renderer->display, config, EGL_NO_CONTEXT, contextAttributes);
 65	graphics_get_display_size(0, &dispWidth, &dispHeight);
 66	adjWidth = dispHeight / 2 * 3;
 67
 68	DISPMANX_DISPLAY_HANDLE_T display = vc_dispmanx_display_open(0);
 69	DISPMANX_UPDATE_HANDLE_T update = vc_dispmanx_update_start(0);
 70
 71	VC_RECT_T destRect = {
 72		.x = (dispWidth - adjWidth) / 2,
 73		.y = 0,
 74		.width = adjWidth,
 75		.height = dispHeight
 76	};
 77
 78	VC_RECT_T srcRect = {
 79		.x = 0,
 80		.y = 0,
 81		.width = 240 << 16,
 82		.height = 160 << 16
 83	};
 84
 85	DISPMANX_ELEMENT_HANDLE_T element = vc_dispmanx_element_add(update, display, 0, &destRect, 0, &srcRect, DISPMANX_PROTECTION_NONE, 0, 0, 0);
 86	vc_dispmanx_update_submit_sync(update);
 87
 88	renderer->window.element = element;
 89	renderer->window.width = dispWidth;
 90	renderer->window.height = dispHeight;
 91
 92	renderer->surface = eglCreateWindowSurface(renderer->display, config, &renderer->window, 0);
 93	if (EGL_FALSE == eglMakeCurrent(renderer->display, renderer->surface, renderer->surface, renderer->context)) {
 94		return false;
 95	}
 96#else
 97	mSDLGLCommonInit(renderer);
 98#endif
 99
100#ifndef __APPLE__
101	renderer->outputBuffer = memalign(16, renderer->width * renderer->height * BYTES_PER_PIXEL);
102#else
103	posix_memalign((void**) &renderer->outputBuffer, 16, renderer->width * renderer->height * BYTES_PER_PIXEL);
104#endif
105	memset(renderer->outputBuffer, 0, renderer->width * renderer->height * BYTES_PER_PIXEL);
106	renderer->core->setVideoBuffer(renderer->core, renderer->outputBuffer, renderer->width);
107
108	mGLES2ContextCreate(&renderer->gl2);
109	renderer->gl2.d.user = renderer;
110	renderer->gl2.d.lockAspectRatio = renderer->lockAspectRatio;
111	renderer->gl2.d.filter = renderer->filter;
112	renderer->gl2.d.swap = mSDLGLCommonSwap;
113	renderer->gl2.d.init(&renderer->gl2.d, 0);
114	renderer->gl2.d.setDimensions(&renderer->gl2.d, renderer->width, renderer->height);
115	return true;
116}
117
118void mSDLGLES2Runloop(struct mSDLRenderer* renderer, void* user) {
119	struct mCoreThread* context = user;
120	SDL_Event event;
121	struct VideoBackend* v = &renderer->gl2.d;
122
123	while (context->state < THREAD_EXITING) {
124		while (SDL_PollEvent(&event)) {
125			mSDLHandleEvent(context, &renderer->player, &event);
126		}
127
128		if (mCoreSyncWaitFrameStart(&context->sync)) {
129			v->postFrame(v, renderer->outputBuffer);
130		}
131		mCoreSyncWaitFrameEnd(&context->sync);
132		v->drawFrame(v);
133#ifdef BUILD_RASPI
134		eglSwapBuffers(renderer->display, renderer->surface);
135#else
136		v->swap(v);
137#endif
138	}
139}
140
141void mSDLGLES2Deinit(struct mSDLRenderer* renderer) {
142	if (renderer->gl2.d.deinit) {
143		renderer->gl2.d.deinit(&renderer->gl2.d);
144	}
145#ifdef BUILD_RASPI
146	eglMakeCurrent(renderer->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
147	eglDestroySurface(renderer->display, renderer->surface);
148	eglDestroyContext(renderer->display, renderer->context);
149	eglTerminate(renderer->display);
150	bcm_host_deinit();
151#elif SDL_VERSION_ATLEAST(2, 0, 0)
152	SDL_GL_DeleteContext(renderer->glCtx);
153#endif
154	free(renderer->outputBuffer);
155}