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 <WindowSurface.h>
31#include <ui/GraphicBuffer.h>
32#include <EGLUtils.h>
33
34using namespace android;
35
36static 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
49static 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
61static 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
68static 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
75static 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
83GLuint 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
118GLuint 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
156GLuint gProgram;
157GLint gvPositionHandle;
158GLint gYuvTexSamplerHandle;
159
160bool 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
179int align(int x, int a) {
180    return (x + (a-1)) & (~(a-1));
181}
182
183const int yuvTexWidth = 608;
184const int yuvTexHeight = 480;
185const int yuvTexUsage = GraphicBuffer::USAGE_HW_TEXTURE |
186        GraphicBuffer::USAGE_SW_WRITE_RARELY;
187const int yuvTexFormat = HAL_PIXEL_FORMAT_YV12;
188const int yuvTexOffsetY = 0;
189const bool yuvTexSameUV = false;
190static sp<GraphicBuffer> yuvTexBuffer;
191static GLuint yuvTex;
192
193bool 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
253const GLfloat gTriangleVertices[] = {
254    -0.5f, 0.5f,
255    -0.5f, -0.5f,
256    0.5f, -0.5f,
257    0.5f, 0.5f,
258};
259
260void 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
283void 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
334int 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    WindowSurface windowSurface;
368    EGLNativeWindowType window = windowSurface.getSurface();
369    returnValue = EGLUtils::selectConfigForNativeWindow(dpy, s_configAttribs, window, &myConfig);
370    if (returnValue) {
371        printf("EGLUtils::selectConfigForNativeWindow() returned %d", returnValue);
372        return 1;
373    }
374
375    checkEglError("EGLUtils::selectConfigForNativeWindow");
376
377    printf("Chose this configuration:\n");
378    printEGLConfiguration(dpy, myConfig);
379
380    surface = eglCreateWindowSurface(dpy, myConfig, window, NULL);
381    checkEglError("eglCreateWindowSurface");
382    if (surface == EGL_NO_SURFACE) {
383        printf("gelCreateWindowSurface failed.\n");
384        return 1;
385    }
386
387    context = eglCreateContext(dpy, myConfig, EGL_NO_CONTEXT, context_attribs);
388    checkEglError("eglCreateContext");
389    if (context == EGL_NO_CONTEXT) {
390        printf("eglCreateContext failed\n");
391        return 1;
392    }
393    returnValue = eglMakeCurrent(dpy, surface, surface, context);
394    checkEglError("eglMakeCurrent", returnValue);
395    if (returnValue != EGL_TRUE) {
396        return 1;
397    }
398    eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
399    checkEglError("eglQuerySurface");
400    eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
401    checkEglError("eglQuerySurface");
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