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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <stdlib.h>
     18 #include <stdio.h>
     19 #include <time.h>
     20 #include <sched.h>
     21 #include <sys/resource.h>
     22 
     23 #include <EGL/egl.h>
     24 #include <EGL/eglext.h>
     25 #include <GLES2/gl2.h>
     26 #include <GLES2/gl2ext.h>
     27 
     28 #include <utils/Timers.h>
     29 
     30 #include <ui/FramebufferNativeWindow.h>
     31 #include <ui/GraphicBuffer.h>
     32 #include "EGLUtils.h"
     33 
     34 using namespace android;
     35 
     36 static void printGLString(const char *name, GLenum s) {
     37     // fprintf(stderr, "printGLString %s, %d\n", name, s);
     38     const char *v = (const char *) glGetString(s);
     39     // int error = glGetError();
     40     // fprintf(stderr, "glGetError() = %d, result of glGetString = %x\n", error,
     41     //        (unsigned int) v);
     42     // if ((v < (const char*) 0) || (v > (const char*) 0x10000))
     43     //    fprintf(stderr, "GL %s = %s\n", name, v);
     44     // else
     45     //    fprintf(stderr, "GL %s = (null) 0x%08x\n", name, (unsigned int) v);
     46     fprintf(stderr, "GL %s = %s\n", name, v);
     47 }
     48 
     49 static void checkEglError(const char* op, EGLBoolean returnVal = EGL_TRUE) {
     50     if (returnVal != EGL_TRUE) {
     51         fprintf(stderr, "%s() returned %d\n", op, returnVal);
     52     }
     53 
     54     for (EGLint error = eglGetError(); error != EGL_SUCCESS; error
     55             = eglGetError()) {
     56         fprintf(stderr, "after %s() eglError %s (0x%x)\n", op, EGLUtils::strerror(error),
     57                 error);
     58     }
     59 }
     60 
     61 static void checkGlError(const char* op) {
     62     for (GLint error = glGetError(); error; error
     63             = glGetError()) {
     64         fprintf(stderr, "after %s() glError (0x%x)\n", op, error);
     65     }
     66 }
     67 
     68 static const char gVertexShader[] = "attribute vec4 vPosition;\n"
     69     "varying vec2 yuvTexCoords;\n"
     70     "void main() {\n"
     71     "  yuvTexCoords = vPosition.xy + vec2(0.5, 0.5);\n"
     72     "  gl_Position = vPosition;\n"
     73     "}\n";
     74 
     75 static const char gFragmentShader[] = "#extension GL_OES_EGL_image_external : require\n"
     76     "precision mediump float;\n"
     77     "uniform samplerExternalOES yuvTexSampler;\n"
     78     "varying vec2 yuvTexCoords;\n"
     79     "void main() {\n"
     80     "  gl_FragColor = texture2D(yuvTexSampler, yuvTexCoords);\n"
     81     "}\n";
     82 
     83 GLuint loadShader(GLenum shaderType, const char* pSource) {
     84     GLuint shader = glCreateShader(shaderType);
     85     if (shader) {
     86         glShaderSource(shader, 1, &pSource, NULL);
     87         glCompileShader(shader);
     88         GLint compiled = 0;
     89         glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
     90         if (!compiled) {
     91             GLint infoLen = 0;
     92             glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
     93             if (infoLen) {
     94                 char* buf = (char*) malloc(infoLen);
     95                 if (buf) {
     96                     glGetShaderInfoLog(shader, infoLen, NULL, buf);
     97                     fprintf(stderr, "Could not compile shader %d:\n%s\n",
     98                             shaderType, buf);
     99                     free(buf);
    100                 }
    101             } else {
    102                 fprintf(stderr, "Guessing at GL_INFO_LOG_LENGTH size\n");
    103                 char* buf = (char*) malloc(0x1000);
    104                 if (buf) {
    105                     glGetShaderInfoLog(shader, 0x1000, NULL, buf);
    106                     fprintf(stderr, "Could not compile shader %d:\n%s\n",
    107                             shaderType, buf);
    108                     free(buf);
    109                 }
    110             }
    111             glDeleteShader(shader);
    112             shader = 0;
    113         }
    114     }
    115     return shader;
    116 }
    117 
    118 GLuint createProgram(const char* pVertexSource, const char* pFragmentSource) {
    119     GLuint vertexShader = loadShader(GL_VERTEX_SHADER, pVertexSource);
    120     if (!vertexShader) {
    121         return 0;
    122     }
    123 
    124     GLuint pixelShader = loadShader(GL_FRAGMENT_SHADER, pFragmentSource);
    125     if (!pixelShader) {
    126         return 0;
    127     }
    128 
    129     GLuint program = glCreateProgram();
    130     if (program) {
    131         glAttachShader(program, vertexShader);
    132         checkGlError("glAttachShader");
    133         glAttachShader(program, pixelShader);
    134         checkGlError("glAttachShader");
    135         glLinkProgram(program);
    136         GLint linkStatus = GL_FALSE;
    137         glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
    138         if (linkStatus != GL_TRUE) {
    139             GLint bufLength = 0;
    140             glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
    141             if (bufLength) {
    142                 char* buf = (char*) malloc(bufLength);
    143                 if (buf) {
    144                     glGetProgramInfoLog(program, bufLength, NULL, buf);
    145                     fprintf(stderr, "Could not link program:\n%s\n", buf);
    146                     free(buf);
    147                 }
    148             }
    149             glDeleteProgram(program);
    150             program = 0;
    151         }
    152     }
    153     return program;
    154 }
    155 
    156 GLuint gProgram;
    157 GLint gvPositionHandle;
    158 GLint gYuvTexSamplerHandle;
    159 
    160 bool setupGraphics(int w, int h) {
    161     gProgram = createProgram(gVertexShader, gFragmentShader);
    162     if (!gProgram) {
    163         return false;
    164     }
    165     gvPositionHandle = glGetAttribLocation(gProgram, "vPosition");
    166     checkGlError("glGetAttribLocation");
    167     fprintf(stderr, "glGetAttribLocation(\"vPosition\") = %d\n",
    168             gvPositionHandle);
    169     gYuvTexSamplerHandle = glGetUniformLocation(gProgram, "yuvTexSampler");
    170     checkGlError("glGetUniformLocation");
    171     fprintf(stderr, "glGetUniformLocation(\"yuvTexSampler\") = %d\n",
    172             gYuvTexSamplerHandle);
    173 
    174     glViewport(0, 0, w, h);
    175     checkGlError("glViewport");
    176     return true;
    177 }
    178 
    179 int align(int x, int a) {
    180     return (x + (a-1)) & (~(a-1));
    181 }
    182 
    183 const int yuvTexWidth = 608;
    184 const int yuvTexHeight = 480;
    185 const int yuvTexUsage = GraphicBuffer::USAGE_HW_TEXTURE |
    186         GraphicBuffer::USAGE_SW_WRITE_RARELY;
    187 const int yuvTexFormat = HAL_PIXEL_FORMAT_YV12;
    188 const int yuvTexOffsetY = 0;
    189 const bool yuvTexSameUV = false;
    190 static sp<GraphicBuffer> yuvTexBuffer;
    191 static GLuint yuvTex;
    192 
    193 bool setupYuvTexSurface(EGLDisplay dpy, EGLContext context) {
    194     int blockWidth = yuvTexWidth > 16 ? yuvTexWidth / 16 : 1;
    195     int blockHeight = yuvTexHeight > 16 ? yuvTexHeight / 16 : 1;
    196     yuvTexBuffer = new GraphicBuffer(yuvTexWidth, yuvTexHeight, yuvTexFormat,
    197             yuvTexUsage);
    198     int yuvTexStrideY = yuvTexBuffer->getStride();
    199     int yuvTexOffsetV = yuvTexStrideY * yuvTexHeight;
    200     int yuvTexStrideV = (yuvTexStrideY/2 + 0xf) & ~0xf;
    201     int yuvTexOffsetU = yuvTexOffsetV + yuvTexStrideV * yuvTexHeight/2;
    202     int yuvTexStrideU = yuvTexStrideV;
    203     char* buf = NULL;
    204     status_t err = yuvTexBuffer->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&buf));
    205     if (err != 0) {
    206         fprintf(stderr, "yuvTexBuffer->lock(...) failed: %d\n", err);
    207         return false;
    208     }
    209     for (int x = 0; x < yuvTexWidth; x++) {
    210         for (int y = 0; y < yuvTexHeight; y++) {
    211             int parityX = (x / blockWidth) & 1;
    212             int parityY = (y / blockHeight) & 1;
    213             unsigned char intensity = (parityX ^ parityY) ? 63 : 191;
    214             buf[yuvTexOffsetY + (y * yuvTexStrideY) + x] = intensity;
    215             if (x < yuvTexWidth / 2 && y < yuvTexHeight / 2) {
    216                 buf[yuvTexOffsetU + (y * yuvTexStrideU) + x] = intensity;
    217                 if (yuvTexSameUV) {
    218                     buf[yuvTexOffsetV + (y * yuvTexStrideV) + x] = intensity;
    219                 } else if (x < yuvTexWidth / 4 && y < yuvTexHeight / 4) {
    220                     buf[yuvTexOffsetV + (y*2 * yuvTexStrideV) + x*2 + 0] =
    221                     buf[yuvTexOffsetV + (y*2 * yuvTexStrideV) + x*2 + 1] =
    222                     buf[yuvTexOffsetV + ((y*2+1) * yuvTexStrideV) + x*2 + 0] =
    223                     buf[yuvTexOffsetV + ((y*2+1) * yuvTexStrideV) + x*2 + 1] = intensity;
    224                 }
    225             }
    226         }
    227     }
    228 
    229     err = yuvTexBuffer->unlock();
    230     if (err != 0) {
    231         fprintf(stderr, "yuvTexBuffer->unlock() failed: %d\n", err);
    232         return false;
    233     }
    234 
    235     EGLClientBuffer clientBuffer = (EGLClientBuffer)yuvTexBuffer->getNativeBuffer();
    236     EGLImageKHR img = eglCreateImageKHR(dpy, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
    237             clientBuffer, 0);
    238     checkEglError("eglCreateImageKHR");
    239     if (img == EGL_NO_IMAGE_KHR) {
    240         return false;
    241     }
    242 
    243     glGenTextures(1, &yuvTex);
    244     checkGlError("glGenTextures");
    245     glBindTexture(GL_TEXTURE_EXTERNAL_OES, yuvTex);
    246     checkGlError("glBindTexture");
    247     glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)img);
    248     checkGlError("glEGLImageTargetTexture2DOES");
    249 
    250     return true;
    251 }
    252 
    253 const GLfloat gTriangleVertices[] = {
    254     -0.5f, 0.5f,
    255     -0.5f, -0.5f,
    256     0.5f, -0.5f,
    257     0.5f, 0.5f,
    258 };
    259 
    260 void renderFrame() {
    261     glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
    262     checkGlError("glClearColor");
    263     glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
    264     checkGlError("glClear");
    265 
    266     glUseProgram(gProgram);
    267     checkGlError("glUseProgram");
    268 
    269     glVertexAttribPointer(gvPositionHandle, 2, GL_FLOAT, GL_FALSE, 0, gTriangleVertices);
    270     checkGlError("glVertexAttribPointer");
    271     glEnableVertexAttribArray(gvPositionHandle);
    272     checkGlError("glEnableVertexAttribArray");
    273 
    274     glUniform1i(gYuvTexSamplerHandle, 0);
    275     checkGlError("glUniform1i");
    276     glBindTexture(GL_TEXTURE_EXTERNAL_OES, yuvTex);
    277     checkGlError("glBindTexture");
    278 
    279     glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
    280     checkGlError("glDrawArrays");
    281 }
    282 
    283 void printEGLConfiguration(EGLDisplay dpy, EGLConfig config) {
    284 
    285 #define X(VAL) {VAL, #VAL}
    286     struct {EGLint attribute; const char* name;} names[] = {
    287     X(EGL_BUFFER_SIZE),
    288     X(EGL_ALPHA_SIZE),
    289     X(EGL_BLUE_SIZE),
    290     X(EGL_GREEN_SIZE),
    291     X(EGL_RED_SIZE),
    292     X(EGL_DEPTH_SIZE),
    293     X(EGL_STENCIL_SIZE),
    294     X(EGL_CONFIG_CAVEAT),
    295     X(EGL_CONFIG_ID),
    296     X(EGL_LEVEL),
    297     X(EGL_MAX_PBUFFER_HEIGHT),
    298     X(EGL_MAX_PBUFFER_PIXELS),
    299     X(EGL_MAX_PBUFFER_WIDTH),
    300     X(EGL_NATIVE_RENDERABLE),
    301     X(EGL_NATIVE_VISUAL_ID),
    302     X(EGL_NATIVE_VISUAL_TYPE),
    303     X(EGL_SAMPLES),
    304     X(EGL_SAMPLE_BUFFERS),
    305     X(EGL_SURFACE_TYPE),
    306     X(EGL_TRANSPARENT_TYPE),
    307     X(EGL_TRANSPARENT_RED_VALUE),
    308     X(EGL_TRANSPARENT_GREEN_VALUE),
    309     X(EGL_TRANSPARENT_BLUE_VALUE),
    310     X(EGL_BIND_TO_TEXTURE_RGB),
    311     X(EGL_BIND_TO_TEXTURE_RGBA),
    312     X(EGL_MIN_SWAP_INTERVAL),
    313     X(EGL_MAX_SWAP_INTERVAL),
    314     X(EGL_LUMINANCE_SIZE),
    315     X(EGL_ALPHA_MASK_SIZE),
    316     X(EGL_COLOR_BUFFER_TYPE),
    317     X(EGL_RENDERABLE_TYPE),
    318     X(EGL_CONFORMANT),
    319    };
    320 #undef X
    321 
    322     for (size_t j = 0; j < sizeof(names) / sizeof(names[0]); j++) {
    323         EGLint value = -1;
    324         EGLint returnVal = eglGetConfigAttrib(dpy, config, names[j].attribute, &value);
    325         EGLint error = eglGetError();
    326         if (returnVal && error == EGL_SUCCESS) {
    327             printf(" %s: ", names[j].name);
    328             printf("%d (0x%x)", value, value);
    329         }
    330     }
    331     printf("\n");
    332 }
    333 
    334 int main(int argc, char** argv) {
    335     EGLBoolean returnValue;
    336     EGLConfig myConfig = {0};
    337 
    338     EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
    339     EGLint s_configAttribs[] = {
    340             EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
    341             EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
    342             EGL_NONE };
    343     EGLint majorVersion;
    344     EGLint minorVersion;
    345     EGLContext context;
    346     EGLSurface surface;
    347     EGLint w, h;
    348 
    349     EGLDisplay dpy;
    350 
    351     checkEglError("<init>");
    352     dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
    353     checkEglError("eglGetDisplay");
    354     if (dpy == EGL_NO_DISPLAY) {
    355         printf("eglGetDisplay returned EGL_NO_DISPLAY.\n");
    356         return 0;
    357     }
    358 
    359     returnValue = eglInitialize(dpy, &majorVersion, &minorVersion);
    360     checkEglError("eglInitialize", returnValue);
    361     fprintf(stderr, "EGL version %d.%d\n", majorVersion, minorVersion);
    362     if (returnValue != EGL_TRUE) {
    363         printf("eglInitialize failed\n");
    364         return 0;
    365     }
    366 
    367     EGLNativeWindowType window = android_createDisplaySurface();
    368     returnValue = EGLUtils::selectConfigForNativeWindow(dpy, s_configAttribs, window, &myConfig);
    369     if (returnValue) {
    370         printf("EGLUtils::selectConfigForNativeWindow() returned %d", returnValue);
    371         return 1;
    372     }
    373 
    374     checkEglError("EGLUtils::selectConfigForNativeWindow");
    375 
    376     printf("Chose this configuration:\n");
    377     printEGLConfiguration(dpy, myConfig);
    378 
    379     surface = eglCreateWindowSurface(dpy, myConfig, window, NULL);
    380     checkEglError("eglCreateWindowSurface");
    381     if (surface == EGL_NO_SURFACE) {
    382         printf("gelCreateWindowSurface failed.\n");
    383         return 1;
    384     }
    385 
    386     context = eglCreateContext(dpy, myConfig, EGL_NO_CONTEXT, context_attribs);
    387     checkEglError("eglCreateContext");
    388     if (context == EGL_NO_CONTEXT) {
    389         printf("eglCreateContext failed\n");
    390         return 1;
    391     }
    392     returnValue = eglMakeCurrent(dpy, surface, surface, context);
    393     checkEglError("eglMakeCurrent", returnValue);
    394     if (returnValue != EGL_TRUE) {
    395         return 1;
    396     }
    397     eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
    398     checkEglError("eglQuerySurface");
    399     eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
    400     checkEglError("eglQuerySurface");
    401     GLint dim = w < h ? w : h;
    402 
    403     fprintf(stderr, "Window dimensions: %d x %d\n", w, h);
    404 
    405     printGLString("Version", GL_VERSION);
    406     printGLString("Vendor", GL_VENDOR);
    407     printGLString("Renderer", GL_RENDERER);
    408     printGLString("Extensions", GL_EXTENSIONS);
    409 
    410     if(!setupYuvTexSurface(dpy, context)) {
    411         fprintf(stderr, "Could not set up texture surface.\n");
    412         return 1;
    413     }
    414 
    415     if(!setupGraphics(w, h)) {
    416         fprintf(stderr, "Could not set up graphics.\n");
    417         return 1;
    418     }
    419 
    420     for (;;) {
    421         renderFrame();
    422         eglSwapBuffers(dpy, surface);
    423         checkEglError("eglSwapBuffers");
    424     }
    425 
    426     return 0;
    427 }
    428