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
 10static bool GBASDLGLES2Init(struct SDLSoftwareRenderer* renderer);
 11static void GBASDLGLES2Runloop(struct GBAThread* context, struct SDLSoftwareRenderer* renderer);
 12static void GBASDLGLES2Deinit(struct SDLSoftwareRenderer* renderer);
 13
 14void GBASDLGLES2Create(struct SDLSoftwareRenderer* renderer) {
 15	renderer->init = GBASDLGLES2Init;
 16	renderer->deinit = GBASDLGLES2Deinit;
 17	renderer->runloop = GBASDLGLES2Runloop;
 18}
 19
 20bool GBASDLGLES2Init(struct SDLSoftwareRenderer* renderer) {
 21#ifdef BUILD_RASPI
 22	bcm_host_init();
 23	renderer->display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 24	int major, minor;
 25	if (EGL_FALSE == eglInitialize(renderer->display, &major, &minor)) {
 26		printf("Failed to initialize EGL");
 27		return false;
 28	}
 29
 30	if (EGL_FALSE == eglBindAPI(EGL_OPENGL_ES_API)) {
 31		printf("Failed to get GLES API");
 32		return false;
 33	}
 34
 35	const EGLint requestConfig[] = {
 36		EGL_RED_SIZE, 5,
 37		EGL_GREEN_SIZE, 5,
 38		EGL_BLUE_SIZE, 5,
 39		EGL_ALPHA_SIZE, 1,
 40		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 41		EGL_NONE
 42	};
 43
 44	EGLConfig config;
 45	EGLint numConfigs;
 46
 47	if (EGL_FALSE == eglChooseConfig(renderer->display, requestConfig, &config, 1, &numConfigs)) {
 48		printf("Failed to choose EGL config\n");
 49		return false;
 50	}
 51
 52	const EGLint contextAttributes[] = {
 53		EGL_CONTEXT_CLIENT_VERSION, 2,
 54		EGL_NONE
 55	};
 56
 57	int dispWidth = 240, dispHeight = 160, adjWidth;
 58	renderer->context = eglCreateContext(renderer->display, config, EGL_NO_CONTEXT, contextAttributes);
 59	graphics_get_display_size(0, &dispWidth, &dispHeight);
 60	adjWidth = dispHeight / 2 * 3;
 61
 62	DISPMANX_DISPLAY_HANDLE_T display = vc_dispmanx_display_open(0);
 63	DISPMANX_UPDATE_HANDLE_T update = vc_dispmanx_update_start(0);
 64
 65	VC_RECT_T destRect = {
 66		.x = (dispWidth - adjWidth) / 2,
 67		.y = 0,
 68		.width = adjWidth,
 69		.height = dispHeight
 70	};
 71
 72	VC_RECT_T srcRect = {
 73		.x = 0,
 74		.y = 0,
 75		.width = 240 << 16,
 76		.height = 160 << 16
 77	};
 78
 79	DISPMANX_ELEMENT_HANDLE_T element = vc_dispmanx_element_add(update, display, 0, &destRect, 0, &srcRect, DISPMANX_PROTECTION_NONE, 0, 0, 0);
 80	vc_dispmanx_update_submit_sync(update);
 81
 82	renderer->window.element = element;
 83	renderer->window.width = dispWidth;
 84	renderer->window.height = dispHeight;
 85
 86	renderer->surface = eglCreateWindowSurface(renderer->display, config, &renderer->window, 0);
 87	if (EGL_FALSE == eglMakeCurrent(renderer->display, renderer->surface, renderer->surface, renderer->context)) {
 88		return false;
 89	}
 90#else
 91	GBASDLGLCommonInit(renderer);
 92#endif
 93
 94	renderer->d.outputBuffer = memalign(16, 256 * 256 * 4);
 95	renderer->d.outputBufferStride = 256;
 96
 97	GBAGLES2ContextCreate(&renderer->gl);
 98	renderer->gl.d.user = renderer;
 99	renderer->gl.d.lockAspectRatio = renderer->lockAspectRatio;
100	renderer->gl.d.filter = renderer->filter;
101	renderer->gl.d.swap = GBASDLGLCommonSwap;
102	renderer->gl.d.init(&renderer->gl.d, 0);
103	return true;
104}
105
106void GBASDLGLES2Runloop(struct GBAThread* context, struct SDLSoftwareRenderer* renderer) {
107	SDL_Event event;
108	struct VideoBackend* v = &renderer->gl.d;
109
110	while (context->state < THREAD_EXITING) {
111		while (SDL_PollEvent(&event)) {
112			GBASDLHandleEvent(context, &renderer->player, &event);
113		}
114
115		if (GBASyncWaitFrameStart(&context->sync, context->frameskip)) {
116			v->postFrame(v, renderer->d.outputBuffer);
117		}
118		v->drawFrame(v);
119		GBASyncWaitFrameEnd(&context->sync);
120#ifdef BUILD_RASPI
121		eglSwapBuffers(renderer->display, renderer->surface);
122#else
123		v->swap(v);
124#endif
125	}
126}
127
128void GBASDLGLES2Deinit(struct SDLSoftwareRenderer* renderer) {
129	if (renderer->gl.d.deinit) {
130		renderer->gl.d.deinit(&renderer->gl.d);
131	}
132#ifdef BUILD_RASPI
133	eglMakeCurrent(renderer->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
134	eglDestroySurface(renderer->display, renderer->surface);
135	eglDestroyContext(renderer->display, renderer->context);
136	eglTerminate(renderer->display);
137	bcm_host_deinit();
138#elif SDL_VERSION_ATLEAST(2, 0, 0)
139	SDL_GL_DeleteContext(renderer->glCtx);
140#endif
141	free(renderer->d.outputBuffer);
142}