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 <malloc.h>
 11
 12static bool GBASDLGLES2Init(struct SDLSoftwareRenderer* renderer);
 13static void GBASDLGLES2Runloop(struct GBAThread* context, struct SDLSoftwareRenderer* renderer);
 14static void GBASDLGLES2Deinit(struct SDLSoftwareRenderer* renderer);
 15
 16void GBASDLGLES2Create(struct SDLSoftwareRenderer* renderer) {
 17	renderer->init = GBASDLGLES2Init;
 18	renderer->deinit = GBASDLGLES2Deinit;
 19	renderer->runloop = GBASDLGLES2Runloop;
 20}
 21
 22bool GBASDLGLES2Init(struct SDLSoftwareRenderer* renderer) {
 23#ifdef BUILD_RASPI
 24	bcm_host_init();
 25	renderer->display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 26	int major, minor;
 27	if (EGL_FALSE == eglInitialize(renderer->display, &major, &minor)) {
 28		printf("Failed to initialize EGL");
 29		return false;
 30	}
 31
 32	if (EGL_FALSE == eglBindAPI(EGL_OPENGL_ES_API)) {
 33		printf("Failed to get GLES API");
 34		return false;
 35	}
 36
 37	const EGLint requestConfig[] = {
 38		EGL_RED_SIZE, 5,
 39		EGL_GREEN_SIZE, 5,
 40		EGL_BLUE_SIZE, 5,
 41		EGL_ALPHA_SIZE, 1,
 42		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 43		EGL_NONE
 44	};
 45
 46	EGLConfig config;
 47	EGLint numConfigs;
 48
 49	if (EGL_FALSE == eglChooseConfig(renderer->display, requestConfig, &config, 1, &numConfigs)) {
 50		printf("Failed to choose EGL config\n");
 51		return false;
 52	}
 53
 54	const EGLint contextAttributes[] = {
 55		EGL_CONTEXT_CLIENT_VERSION, 2,
 56		EGL_NONE
 57	};
 58
 59	int dispWidth = 240, dispHeight = 160, adjWidth;
 60	renderer->context = eglCreateContext(renderer->display, config, EGL_NO_CONTEXT, contextAttributes);
 61	graphics_get_display_size(0, &dispWidth, &dispHeight);
 62	adjWidth = dispHeight / 2 * 3;
 63
 64	DISPMANX_DISPLAY_HANDLE_T display = vc_dispmanx_display_open(0);
 65	DISPMANX_UPDATE_HANDLE_T update = vc_dispmanx_update_start(0);
 66
 67	VC_RECT_T destRect = {
 68		.x = (dispWidth - adjWidth) / 2,
 69		.y = 0,
 70		.width = adjWidth,
 71		.height = dispHeight
 72	};
 73
 74	VC_RECT_T srcRect = {
 75		.x = 0,
 76		.y = 0,
 77		.width = 240 << 16,
 78		.height = 160 << 16
 79	};
 80
 81	DISPMANX_ELEMENT_HANDLE_T element = vc_dispmanx_element_add(update, display, 0, &destRect, 0, &srcRect, DISPMANX_PROTECTION_NONE, 0, 0, 0);
 82	vc_dispmanx_update_submit_sync(update);
 83
 84	renderer->window.element = element;
 85	renderer->window.width = dispWidth;
 86	renderer->window.height = dispHeight;
 87
 88	renderer->surface = eglCreateWindowSurface(renderer->display, config, &renderer->window, 0);
 89	if (EGL_FALSE == eglMakeCurrent(renderer->display, renderer->surface, renderer->surface, renderer->context)) {
 90		return false;
 91	}
 92#else
 93	GBASDLGLCommonInit(renderer);
 94#endif
 95
 96	renderer->d.outputBuffer = memalign(16, 256 * 256 * 4);
 97	renderer->d.outputBufferStride = 256;
 98
 99	GBAGLES2ContextCreate(&renderer->gl);
100	renderer->gl.d.user = renderer;
101	renderer->gl.d.lockAspectRatio = renderer->lockAspectRatio;
102	renderer->gl.d.filter = renderer->filter;
103	renderer->gl.d.swap = GBASDLGLCommonSwap;
104	renderer->gl.d.init(&renderer->gl.d, 0);
105	return true;
106}
107
108void GBASDLGLES2Runloop(struct GBAThread* context, struct SDLSoftwareRenderer* renderer) {
109	SDL_Event event;
110	struct VideoBackend* v = &renderer->gl.d;
111
112	while (context->state < THREAD_EXITING) {
113		while (SDL_PollEvent(&event)) {
114			GBASDLHandleEvent(context, &renderer->player, &event);
115		}
116
117		if (GBASyncWaitFrameStart(&context->sync)) {
118			v->postFrame(v, renderer->d.outputBuffer);
119		}
120		v->drawFrame(v);
121		GBASyncWaitFrameEnd(&context->sync);
122#ifdef BUILD_RASPI
123		eglSwapBuffers(renderer->display, renderer->surface);
124#else
125		v->swap(v);
126#endif
127	}
128}
129
130void GBASDLGLES2Deinit(struct SDLSoftwareRenderer* renderer) {
131	if (renderer->gl.d.deinit) {
132		renderer->gl.d.deinit(&renderer->gl.d);
133	}
134#ifdef BUILD_RASPI
135	eglMakeCurrent(renderer->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
136	eglDestroySurface(renderer->display, renderer->surface);
137	eglDestroyContext(renderer->display, renderer->context);
138	eglTerminate(renderer->display);
139	bcm_host_deinit();
140#elif SDL_VERSION_ATLEAST(2, 0, 0)
141	SDL_GL_DeleteContext(renderer->glCtx);
142#endif
143	free(renderer->d.outputBuffer);
144}