opengl/tests/gl_yuvtex/gl_yuvtex.cpp - LeafOS-Project/android_frameworks_native - Gitiles

 /*
  * Copyright (C) 2010 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <stdlib.h>
 #include <stdio.h>
 #include <time.h>
 #include <sched.h>
 #include <sys/resource.h>

 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 #include <GLES/gl.h>
 #include <GLES/glext.h>

 #include <utils/Timers.h>

 #include <WindowSurface.h>
 #include <ui/GraphicBuffer.h>
 #include <EGLUtils.h>

 using namespace android;

 static void printGLString(const char *name, GLenum s) {
     // fprintf(stderr, "printGLString %s, %d\n", name, s);
     const char *v = (const char *) glGetString(s);
     // int error = glGetError();
     // fprintf(stderr, "glGetError() = %d, result of glGetString = %x\n", error,
     //        (unsigned int) v);
     // if ((v < (const char*) 0) || (v > (const char*) 0x10000))
     //    fprintf(stderr, "GL %s = %s\n", name, v);
     // else
     //    fprintf(stderr, "GL %s = (null) 0x%08x\n", name, (unsigned int) v);
     fprintf(stderr, "GL %s = %s\n", name, v);
 }

 static void checkEglError(const char* op, EGLBoolean returnVal = EGL_TRUE) {
     if (returnVal != EGL_TRUE) {
         fprintf(stderr, "%s() returned %d\n", op, returnVal);
     }

     for (EGLint error = eglGetError(); error != EGL_SUCCESS; error
             = eglGetError()) {
         fprintf(stderr, "after %s() eglError %s (0x%x)\n", op, EGLUtils::strerror(error),
                 error);
     }
 }

 static void checkGlError(const char* op) {
     for (GLint error = glGetError(); error; error
             = glGetError()) {
         fprintf(stderr, "after %s() glError (0x%x)\n", op, error);
     }
 }

 bool setupGraphics(int w, int h) {
     glViewport(0, 0, w, h);
     checkGlError("glViewport");
     return true;
 }

 int align(int x, int a) {
     return (x + (a-1)) & (~(a-1));
 }

 const int yuvTexWidth = 600;
 const int yuvTexHeight = 480;
 const int yuvTexUsage = GraphicBuffer::USAGE_HW_TEXTURE |
         GraphicBuffer::USAGE_SW_WRITE_RARELY;
 const int yuvTexFormat = HAL_PIXEL_FORMAT_YV12;
 const int yuvTexOffsetY = 0;
 const int yuvTexStrideY = (yuvTexWidth + 0xf) & ~0xf;
 const int yuvTexOffsetV = yuvTexStrideY * yuvTexHeight;
 const int yuvTexStrideV = (yuvTexStrideY/2 + 0xf) & ~0xf;
 const int yuvTexOffsetU = yuvTexOffsetV + yuvTexStrideV * yuvTexHeight/2;
 const int yuvTexStrideU = yuvTexStrideV;
 const bool yuvTexSameUV = false;
 static sp<GraphicBuffer> yuvTexBuffer;
 static GLuint yuvTex;

 bool setupYuvTexSurface(EGLDisplay dpy, EGLContext context) {
     int blockWidth = yuvTexWidth > 16 ? yuvTexWidth / 16 : 1;
     int blockHeight = yuvTexHeight > 16 ? yuvTexHeight / 16 : 1;
     yuvTexBuffer = new GraphicBuffer(yuvTexWidth, yuvTexHeight, yuvTexFormat,
             yuvTexUsage);
     char* buf = NULL;
     status_t err = yuvTexBuffer->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&buf));
     if (err != 0) {
         fprintf(stderr, "yuvTexBuffer->lock(...) failed: %d\n", err);
         return false;
     }
     for (int x = 0; x < yuvTexWidth; x++) {
         for (int y = 0; y < yuvTexHeight; y++) {
             int parityX = (x / blockWidth) & 1;
             int parityY = (y / blockHeight) & 1;
             unsigned char intensity = (parityX ^ parityY) ? 63 : 191;
             buf[yuvTexOffsetY + (y * yuvTexStrideY) + x] = intensity;
             if (x < yuvTexWidth / 2 && y < yuvTexHeight / 2) {
                 buf[yuvTexOffsetU + (y * yuvTexStrideU) + x] = intensity;
                 if (yuvTexSameUV) {
                     buf[yuvTexOffsetV + (y * yuvTexStrideV) + x] = intensity;
                 } else if (x < yuvTexWidth / 4 && y < yuvTexHeight / 4) {
                     buf[yuvTexOffsetV + (y*2 * yuvTexStrideV) + x*2 + 0] =
                     buf[yuvTexOffsetV + (y*2 * yuvTexStrideV) + x*2 + 1] =
                     buf[yuvTexOffsetV + ((y*2+1) * yuvTexStrideV) + x*2 + 0] =
                     buf[yuvTexOffsetV + ((y*2+1) * yuvTexStrideV) + x*2 + 1] = intensity;
                 }
             }
         }
     }

     err = yuvTexBuffer->unlock();
     if (err != 0) {
         fprintf(stderr, "yuvTexBuffer->unlock() failed: %d\n", err);
         return false;
     }

     EGLClientBuffer clientBuffer = (EGLClientBuffer)yuvTexBuffer->getNativeBuffer();
     EGLImageKHR img = eglCreateImageKHR(dpy, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
             clientBuffer, 0);
     checkEglError("eglCreateImageKHR");
     if (img == EGL_NO_IMAGE_KHR) {
         return false;
     }

     glGenTextures(1, &yuvTex);
     checkGlError("glGenTextures");
     glBindTexture(GL_TEXTURE_EXTERNAL_OES, yuvTex);
     checkGlError("glBindTexture");
     glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)img);
     checkGlError("glEGLImageTargetTexture2DOES");
     glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     checkGlError("glTexParameteri");
     glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
     checkGlError("glTexParameteri");
     glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
     checkGlError("glTexEnvx");

     GLint crop[4] = { 0, 0, yuvTexWidth, yuvTexHeight };
     glTexParameteriv(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_CROP_RECT_OES, crop);
     checkGlError("glTexParameteriv");

     return true;
 }

 void renderFrame(int w, int h) {
     glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
     checkGlError("glClearColor");
     glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
     checkGlError("glClear");

     glBindTexture(GL_TEXTURE_EXTERNAL_OES, yuvTex);
     checkGlError("glBindTexture");
     glEnable(GL_TEXTURE_EXTERNAL_OES);
     checkGlError("glEnable");

     glDrawTexiOES(0, 0, 0, w, h);
     checkGlError("glDrawTexiOES");
 }

 void printEGLConfiguration(EGLDisplay dpy, EGLConfig config) {

 #define X(VAL) {VAL, #VAL}
     struct {EGLint attribute; const char* name;} names[] = {
     X(EGL_BUFFER_SIZE),
     X(EGL_ALPHA_SIZE),
     X(EGL_BLUE_SIZE),
     X(EGL_GREEN_SIZE),
     X(EGL_RED_SIZE),
     X(EGL_DEPTH_SIZE),
     X(EGL_STENCIL_SIZE),
     X(EGL_CONFIG_CAVEAT),
     X(EGL_CONFIG_ID),
     X(EGL_LEVEL),
     X(EGL_MAX_PBUFFER_HEIGHT),
     X(EGL_MAX_PBUFFER_PIXELS),
     X(EGL_MAX_PBUFFER_WIDTH),
     X(EGL_NATIVE_RENDERABLE),
     X(EGL_NATIVE_VISUAL_ID),
     X(EGL_NATIVE_VISUAL_TYPE),
     X(EGL_SAMPLES),
     X(EGL_SAMPLE_BUFFERS),
     X(EGL_SURFACE_TYPE),
     X(EGL_TRANSPARENT_TYPE),
     X(EGL_TRANSPARENT_RED_VALUE),
     X(EGL_TRANSPARENT_GREEN_VALUE),
     X(EGL_TRANSPARENT_BLUE_VALUE),
     X(EGL_BIND_TO_TEXTURE_RGB),
     X(EGL_BIND_TO_TEXTURE_RGBA),
     X(EGL_MIN_SWAP_INTERVAL),
     X(EGL_MAX_SWAP_INTERVAL),
     X(EGL_LUMINANCE_SIZE),
     X(EGL_ALPHA_MASK_SIZE),
     X(EGL_COLOR_BUFFER_TYPE),
     X(EGL_RENDERABLE_TYPE),
     X(EGL_CONFORMANT),
    };
 #undef X

     for (size_t j = 0; j < sizeof(names) / sizeof(names[0]); j++) {
         EGLint value = -1;
         EGLint returnVal = eglGetConfigAttrib(dpy, config, names[j].attribute, &value);
         EGLint error = eglGetError();
         if (returnVal && error == EGL_SUCCESS) {
             printf(" %s: ", names[j].name);
             printf("%d (0x%x)", value, value);
         }
     }
     printf("\n");
 }

 int main(int argc, char** argv) {
     EGLBoolean returnValue;
     EGLConfig myConfig = {0};

     EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 1, EGL_NONE };
     EGLint s_configAttribs[] = {
             EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
             EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT,
             EGL_NONE };
     EGLint majorVersion;
     EGLint minorVersion;
     EGLContext context;
     EGLSurface surface;
     EGLint w, h;

     EGLDisplay dpy;

     checkEglError("<init>");
     dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
     checkEglError("eglGetDisplay");
     if (dpy == EGL_NO_DISPLAY) {
         printf("eglGetDisplay returned EGL_NO_DISPLAY.\n");
         return 0;
     }

     returnValue = eglInitialize(dpy, &majorVersion, &minorVersion);
     checkEglError("eglInitialize", returnValue);
     fprintf(stderr, "EGL version %d.%d\n", majorVersion, minorVersion);
     if (returnValue != EGL_TRUE) {
         printf("eglInitialize failed\n");
         return 0;
     }

     WindowSurface windowSurface;
     EGLNativeWindowType window = windowSurface.getSurface();
     returnValue = EGLUtils::selectConfigForNativeWindow(dpy, s_configAttribs, window, &myConfig);
     if (returnValue) {
         printf("EGLUtils::selectConfigForNativeWindow() returned %d", returnValue);
         return 1;
     }

     checkEglError("EGLUtils::selectConfigForNativeWindow");

     printf("Chose this configuration:\n");
     printEGLConfiguration(dpy, myConfig);

     surface = eglCreateWindowSurface(dpy, myConfig, window, NULL);
     checkEglError("eglCreateWindowSurface");
     if (surface == EGL_NO_SURFACE) {
         printf("gelCreateWindowSurface failed.\n");
         return 1;
     }

     context = eglCreateContext(dpy, myConfig, EGL_NO_CONTEXT, context_attribs);
     checkEglError("eglCreateContext");
     if (context == EGL_NO_CONTEXT) {
         printf("eglCreateContext failed\n");
         return 1;
     }
     returnValue = eglMakeCurrent(dpy, surface, surface, context);
     checkEglError("eglMakeCurrent", returnValue);
     if (returnValue != EGL_TRUE) {
         return 1;
     }
     eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
     checkEglError("eglQuerySurface");
     eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
     checkEglError("eglQuerySurface");
     GLint dim = w < h ? w : h;

     fprintf(stderr, "Window dimensions: %d x %d\n", w, h);

     printGLString("Version", GL_VERSION);
     printGLString("Vendor", GL_VENDOR);
     printGLString("Renderer", GL_RENDERER);
     printGLString("Extensions", GL_EXTENSIONS);

     if(!setupYuvTexSurface(dpy, context)) {
         fprintf(stderr, "Could not set up texture surface.\n");
         return 1;
     }

     if(!setupGraphics(w, h)) {
         fprintf(stderr, "Could not set up graphics.\n");
         return 1;
     }

     for (;;) {
         static int dir = -1;

         renderFrame(w, h);
         eglSwapBuffers(dpy, surface);
         checkEglError("eglSwapBuffers");

         if (w <= 10 || h <= 10)
         {
             dir = -dir;
         }

         if (w >= 1300 || h >= 900)
         {
             dir = -dir;
         }


         w += dir;
         h += dir;
     }

     return 0;
 }
	/*
	* Copyright (C) 2010 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <stdlib.h>
	#include <stdio.h>
	#include <time.h>
	#include <sched.h>
	#include <sys/resource.h>

	#include <EGL/egl.h>
	#include <EGL/eglext.h>
	#include <GLES/gl.h>
	#include <GLES/glext.h>

	#include <utils/Timers.h>

	#include <WindowSurface.h>
	#include <ui/GraphicBuffer.h>
	#include <EGLUtils.h>

	using namespace android;

	static void printGLString(const char *name, GLenum s) {
	// fprintf(stderr, "printGLString %s, %d\n", name, s);
	const char v = (const char ) glGetString(s);
	// int error = glGetError();
	// fprintf(stderr, "glGetError() = %d, result of glGetString = %x\n", error,
	// (unsigned int) v);
	// if ((v < (const char) 0) \|\| (v > (const char) 0x10000))
	// fprintf(stderr, "GL %s = %s\n", name, v);
	// else
	// fprintf(stderr, "GL %s = (null) 0x%08x\n", name, (unsigned int) v);
	fprintf(stderr, "GL %s = %s\n", name, v);
	}

	static void checkEglError(const char* op, EGLBoolean returnVal = EGL_TRUE) {
	if (returnVal != EGL_TRUE) {
	fprintf(stderr, "%s() returned %d\n", op, returnVal);
	}

	for (EGLint error = eglGetError(); error != EGL_SUCCESS; error
	= eglGetError()) {
	fprintf(stderr, "after %s() eglError %s (0x%x)\n", op, EGLUtils::strerror(error),
	error);
	}
	}

	static void checkGlError(const char* op) {
	for (GLint error = glGetError(); error; error
	= glGetError()) {
	fprintf(stderr, "after %s() glError (0x%x)\n", op, error);
	}
	}

	bool setupGraphics(int w, int h) {
	glViewport(0, 0, w, h);
	checkGlError("glViewport");
	return true;
	}

	int align(int x, int a) {
	return (x + (a-1)) & (~(a-1));
	}

	const int yuvTexWidth = 600;
	const int yuvTexHeight = 480;
	const int yuvTexUsage = GraphicBuffer::USAGE_HW_TEXTURE \|
	GraphicBuffer::USAGE_SW_WRITE_RARELY;
	const int yuvTexFormat = HAL_PIXEL_FORMAT_YV12;
	const int yuvTexOffsetY = 0;
	const int yuvTexStrideY = (yuvTexWidth + 0xf) & ~0xf;
	const int yuvTexOffsetV = yuvTexStrideY * yuvTexHeight;
	const int yuvTexStrideV = (yuvTexStrideY/2 + 0xf) & ~0xf;
	const int yuvTexOffsetU = yuvTexOffsetV + yuvTexStrideV * yuvTexHeight/2;
	const int yuvTexStrideU = yuvTexStrideV;
	const bool yuvTexSameUV = false;
	static sp<GraphicBuffer> yuvTexBuffer;
	static GLuint yuvTex;

	bool setupYuvTexSurface(EGLDisplay dpy, EGLContext context) {
	int blockWidth = yuvTexWidth > 16 ? yuvTexWidth / 16 : 1;
	int blockHeight = yuvTexHeight > 16 ? yuvTexHeight / 16 : 1;
	yuvTexBuffer = new GraphicBuffer(yuvTexWidth, yuvTexHeight, yuvTexFormat,
	yuvTexUsage);
	char* buf = NULL;
	status_t err = yuvTexBuffer->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&buf));
	if (err != 0) {
	fprintf(stderr, "yuvTexBuffer->lock(...) failed: %d\n", err);
	return false;
	}
	for (int x = 0; x < yuvTexWidth; x++) {
	for (int y = 0; y < yuvTexHeight; y++) {
	int parityX = (x / blockWidth) & 1;
	int parityY = (y / blockHeight) & 1;
	unsigned char intensity = (parityX ^ parityY) ? 63 : 191;
	buf[yuvTexOffsetY + (y * yuvTexStrideY) + x] = intensity;
	if (x < yuvTexWidth / 2 && y < yuvTexHeight / 2) {
	buf[yuvTexOffsetU + (y * yuvTexStrideU) + x] = intensity;
	if (yuvTexSameUV) {
	buf[yuvTexOffsetV + (y * yuvTexStrideV) + x] = intensity;
	} else if (x < yuvTexWidth / 4 && y < yuvTexHeight / 4) {
	buf[yuvTexOffsetV + (y2 yuvTexStrideV) + x*2 + 0] =
	buf[yuvTexOffsetV + (y2 yuvTexStrideV) + x*2 + 1] =
	buf[yuvTexOffsetV + ((y2+1) yuvTexStrideV) + x*2 + 0] =
	buf[yuvTexOffsetV + ((y2+1) yuvTexStrideV) + x*2 + 1] = intensity;
	}
	}
	}
	}

	err = yuvTexBuffer->unlock();
	if (err != 0) {
	fprintf(stderr, "yuvTexBuffer->unlock() failed: %d\n", err);
	return false;
	}

	EGLClientBuffer clientBuffer = (EGLClientBuffer)yuvTexBuffer->getNativeBuffer();
	EGLImageKHR img = eglCreateImageKHR(dpy, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
	clientBuffer, 0);
	checkEglError("eglCreateImageKHR");
	if (img == EGL_NO_IMAGE_KHR) {
	return false;
	}

	glGenTextures(1, &yuvTex);
	checkGlError("glGenTextures");
	glBindTexture(GL_TEXTURE_EXTERNAL_OES, yuvTex);
	checkGlError("glBindTexture");
	glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)img);
	checkGlError("glEGLImageTargetTexture2DOES");
	glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	checkGlError("glTexParameteri");
	glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	checkGlError("glTexParameteri");
	glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
	checkGlError("glTexEnvx");

	GLint crop[4] = { 0, 0, yuvTexWidth, yuvTexHeight };
	glTexParameteriv(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_CROP_RECT_OES, crop);
	checkGlError("glTexParameteriv");

	return true;
	}

	void renderFrame(int w, int h) {
	glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
	checkGlError("glClearColor");
	glClear( GL_DEPTH_BUFFER_BIT \| GL_COLOR_BUFFER_BIT);
	checkGlError("glClear");

	glBindTexture(GL_TEXTURE_EXTERNAL_OES, yuvTex);
	checkGlError("glBindTexture");
	glEnable(GL_TEXTURE_EXTERNAL_OES);
	checkGlError("glEnable");

	glDrawTexiOES(0, 0, 0, w, h);
	checkGlError("glDrawTexiOES");
	}

	void printEGLConfiguration(EGLDisplay dpy, EGLConfig config) {

	#define X(VAL) {VAL, #VAL}
	struct {EGLint attribute; const char* name;} names[] = {
	X(EGL_BUFFER_SIZE),
	X(EGL_ALPHA_SIZE),
	X(EGL_BLUE_SIZE),
	X(EGL_GREEN_SIZE),
	X(EGL_RED_SIZE),
	X(EGL_DEPTH_SIZE),
	X(EGL_STENCIL_SIZE),
	X(EGL_CONFIG_CAVEAT),
	X(EGL_CONFIG_ID),
	X(EGL_LEVEL),
	X(EGL_MAX_PBUFFER_HEIGHT),
	X(EGL_MAX_PBUFFER_PIXELS),
	X(EGL_MAX_PBUFFER_WIDTH),
	X(EGL_NATIVE_RENDERABLE),
	X(EGL_NATIVE_VISUAL_ID),
	X(EGL_NATIVE_VISUAL_TYPE),
	X(EGL_SAMPLES),
	X(EGL_SAMPLE_BUFFERS),
	X(EGL_SURFACE_TYPE),
	X(EGL_TRANSPARENT_TYPE),
	X(EGL_TRANSPARENT_RED_VALUE),
	X(EGL_TRANSPARENT_GREEN_VALUE),
	X(EGL_TRANSPARENT_BLUE_VALUE),
	X(EGL_BIND_TO_TEXTURE_RGB),
	X(EGL_BIND_TO_TEXTURE_RGBA),
	X(EGL_MIN_SWAP_INTERVAL),
	X(EGL_MAX_SWAP_INTERVAL),
	X(EGL_LUMINANCE_SIZE),
	X(EGL_ALPHA_MASK_SIZE),
	X(EGL_COLOR_BUFFER_TYPE),
	X(EGL_RENDERABLE_TYPE),
	X(EGL_CONFORMANT),
	};
	#undef X

	for (size_t j = 0; j < sizeof(names) / sizeof(names[0]); j++) {
	EGLint value = -1;
	EGLint returnVal = eglGetConfigAttrib(dpy, config, names[j].attribute, &value);
	EGLint error = eglGetError();
	if (returnVal && error == EGL_SUCCESS) {
	printf(" %s: ", names[j].name);
	printf("%d (0x%x)", value, value);
	}
	}
	printf("\n");
	}

	int main(int argc, char** argv) {
	EGLBoolean returnValue;
	EGLConfig myConfig = {0};

	EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 1, EGL_NONE };
	EGLint s_configAttribs[] = {
	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
	EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT,
	EGL_NONE };
	EGLint majorVersion;
	EGLint minorVersion;
	EGLContext context;
	EGLSurface surface;
	EGLint w, h;

	EGLDisplay dpy;

	checkEglError("<init>");
	dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
	checkEglError("eglGetDisplay");
	if (dpy == EGL_NO_DISPLAY) {
	printf("eglGetDisplay returned EGL_NO_DISPLAY.\n");
	return 0;
	}

	returnValue = eglInitialize(dpy, &majorVersion, &minorVersion);
	checkEglError("eglInitialize", returnValue);
	fprintf(stderr, "EGL version %d.%d\n", majorVersion, minorVersion);
	if (returnValue != EGL_TRUE) {
	printf("eglInitialize failed\n");
	return 0;
	}

	WindowSurface windowSurface;
	EGLNativeWindowType window = windowSurface.getSurface();
	returnValue = EGLUtils::selectConfigForNativeWindow(dpy, s_configAttribs, window, &myConfig);
	if (returnValue) {
	printf("EGLUtils::selectConfigForNativeWindow() returned %d", returnValue);
	return 1;
	}

	checkEglError("EGLUtils::selectConfigForNativeWindow");

	printf("Chose this configuration:\n");
	printEGLConfiguration(dpy, myConfig);

	surface = eglCreateWindowSurface(dpy, myConfig, window, NULL);
	checkEglError("eglCreateWindowSurface");
	if (surface == EGL_NO_SURFACE) {
	printf("gelCreateWindowSurface failed.\n");
	return 1;
	}

	context = eglCreateContext(dpy, myConfig, EGL_NO_CONTEXT, context_attribs);
	checkEglError("eglCreateContext");
	if (context == EGL_NO_CONTEXT) {
	printf("eglCreateContext failed\n");
	return 1;
	}
	returnValue = eglMakeCurrent(dpy, surface, surface, context);
	checkEglError("eglMakeCurrent", returnValue);
	if (returnValue != EGL_TRUE) {
	return 1;
	}
	eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
	checkEglError("eglQuerySurface");
	eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
	checkEglError("eglQuerySurface");
	GLint dim = w < h ? w : h;

	fprintf(stderr, "Window dimensions: %d x %d\n", w, h);

	printGLString("Version", GL_VERSION);
	printGLString("Vendor", GL_VENDOR);
	printGLString("Renderer", GL_RENDERER);
	printGLString("Extensions", GL_EXTENSIONS);

	if(!setupYuvTexSurface(dpy, context)) {
	fprintf(stderr, "Could not set up texture surface.\n");
	return 1;
	}

	if(!setupGraphics(w, h)) {
	fprintf(stderr, "Could not set up graphics.\n");
	return 1;
	}

	for (;;) {
	static int dir = -1;

	renderFrame(w, h);
	eglSwapBuffers(dpy, surface);
	checkEglError("eglSwapBuffers");

	if (w <= 10 \|\| h <= 10)
	{
	dir = -dir;
	}

	if (w >= 1300 \|\| h >= 900)
	{
	dir = -dir;
	}


	w += dir;
	h += dir;
	}

	return 0;
	}