1 /*
2 * Copyright (C) 2012 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 <GLES2/gl2.h>
18 #include <GLES2/gl2ext.h>
19
20 #include <ui/DisplayInfo.h>
21 #include <gui/SurfaceComposerClient.h>
22
23 #include "GLHelper.h"
24
25 namespace android {
26
GLHelper()27 GLHelper::GLHelper() :
28 mDisplay(EGL_NO_DISPLAY),
29 mContext(EGL_NO_CONTEXT),
30 mDummySurface(EGL_NO_SURFACE),
31 mConfig(0),
32 mShaderPrograms(nullptr),
33 mDitherTexture(0) {
34 }
35
~GLHelper()36 GLHelper::~GLHelper() {
37 }
38
setUp(const ShaderDesc * shaderDescs,size_t numShaders)39 bool GLHelper::setUp(const ShaderDesc* shaderDescs, size_t numShaders) {
40 bool result;
41
42 mDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
43 if (mDisplay == EGL_NO_DISPLAY) {
44 fprintf(stderr, "eglGetDisplay error: %#x\n", eglGetError());
45 return false;
46 }
47
48 EGLint majorVersion;
49 EGLint minorVersion;
50 result = eglInitialize(mDisplay, &majorVersion, &minorVersion);
51 if (result != EGL_TRUE) {
52 fprintf(stderr, "eglInitialize error: %#x\n", eglGetError());
53 return false;
54 }
55
56 EGLint numConfigs = 0;
57 EGLint configAttribs[] = {
58 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
59 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
60 EGL_RED_SIZE, 8,
61 EGL_GREEN_SIZE, 8,
62 EGL_BLUE_SIZE, 8,
63 EGL_ALPHA_SIZE, 8,
64 EGL_NONE
65 };
66 result = eglChooseConfig(mDisplay, configAttribs, &mConfig, 1,
67 &numConfigs);
68 if (result != EGL_TRUE) {
69 fprintf(stderr, "eglChooseConfig error: %#x\n", eglGetError());
70 return false;
71 }
72
73 EGLint contextAttribs[] = {
74 EGL_CONTEXT_CLIENT_VERSION, 2,
75 EGL_NONE
76 };
77 mContext = eglCreateContext(mDisplay, mConfig, EGL_NO_CONTEXT,
78 contextAttribs);
79 if (mContext == EGL_NO_CONTEXT) {
80 fprintf(stderr, "eglCreateContext error: %#x\n", eglGetError());
81 return false;
82 }
83
84 bool resultb = createNamedSurfaceTexture(0, 1, 1, &mDummyGLConsumer,
85 &mDummySurface);
86 if (!resultb) {
87 return false;
88 }
89
90 resultb = makeCurrent(mDummySurface);
91 if (!resultb) {
92 return false;
93 }
94
95 resultb = setUpShaders(shaderDescs, numShaders);
96 if (!resultb) {
97 return false;
98 }
99
100 return true;
101 }
102
tearDown()103 void GLHelper::tearDown() {
104 if (mShaderPrograms != nullptr) {
105 delete[] mShaderPrograms;
106 mShaderPrograms = nullptr;
107 }
108
109 if (mSurfaceComposerClient != nullptr) {
110 mSurfaceComposerClient->dispose();
111 mSurfaceComposerClient.clear();
112 }
113
114 if (mDisplay != EGL_NO_DISPLAY) {
115 eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE,
116 EGL_NO_CONTEXT);
117 }
118
119 if (mContext != EGL_NO_CONTEXT) {
120 eglDestroyContext(mDisplay, mContext);
121 }
122
123 if (mDummySurface != EGL_NO_SURFACE) {
124 eglDestroySurface(mDisplay, mDummySurface);
125 }
126
127 mDisplay = EGL_NO_DISPLAY;
128 mContext = EGL_NO_CONTEXT;
129 mDummySurface = EGL_NO_SURFACE;
130 mDummyGLConsumer.clear();
131 mConfig = 0;
132 }
133
makeCurrent(EGLSurface surface)134 bool GLHelper::makeCurrent(EGLSurface surface) {
135 EGLint result;
136
137 result = eglMakeCurrent(mDisplay, surface, surface, mContext);
138 if (result != EGL_TRUE) {
139 fprintf(stderr, "eglMakeCurrent error: %#x\n", eglGetError());
140 return false;
141 }
142
143 EGLint w, h;
144 eglQuerySurface(mDisplay, surface, EGL_WIDTH, &w);
145 eglQuerySurface(mDisplay, surface, EGL_HEIGHT, &h);
146 glViewport(0, 0, w, h);
147
148 return true;
149 }
150
createSurfaceTexture(uint32_t w,uint32_t h,sp<GLConsumer> * glConsumer,EGLSurface * surface,GLuint * name)151 bool GLHelper::createSurfaceTexture(uint32_t w, uint32_t h,
152 sp<GLConsumer>* glConsumer, EGLSurface* surface,
153 GLuint* name) {
154 if (!makeCurrent(mDummySurface)) {
155 return false;
156 }
157
158 *name = 0;
159 glGenTextures(1, name);
160 if (*name == 0) {
161 fprintf(stderr, "glGenTextures error: %#x\n", glGetError());
162 return false;
163 }
164
165 return createNamedSurfaceTexture(*name, w, h, glConsumer, surface);
166 }
167
destroySurface(EGLSurface * surface)168 void GLHelper::destroySurface(EGLSurface* surface) {
169 if (eglGetCurrentSurface(EGL_READ) == *surface ||
170 eglGetCurrentSurface(EGL_DRAW) == *surface) {
171 eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE,
172 EGL_NO_CONTEXT);
173 }
174 eglDestroySurface(mDisplay, *surface);
175 *surface = EGL_NO_SURFACE;
176 }
177
swapBuffers(EGLSurface surface)178 bool GLHelper::swapBuffers(EGLSurface surface) {
179 EGLint result;
180 result = eglSwapBuffers(mDisplay, surface);
181 if (result != EGL_TRUE) {
182 fprintf(stderr, "eglSwapBuffers error: %#x\n", eglGetError());
183 return false;
184 }
185 return true;
186 }
187
getShaderProgram(const char * name,GLuint * outPgm)188 bool GLHelper::getShaderProgram(const char* name, GLuint* outPgm) {
189 for (size_t i = 0; i < mNumShaders; i++) {
190 if (strcmp(mShaderDescs[i].name, name) == 0) {
191 *outPgm = mShaderPrograms[i];
192 return true;
193 }
194 }
195
196 fprintf(stderr, "unknown shader name: \"%s\"\n", name);
197
198 return false;
199 }
200
createNamedSurfaceTexture(GLuint name,uint32_t w,uint32_t h,sp<GLConsumer> * glConsumer,EGLSurface * surface)201 bool GLHelper::createNamedSurfaceTexture(GLuint name, uint32_t w, uint32_t h,
202 sp<GLConsumer>* glConsumer, EGLSurface* surface) {
203 sp<IGraphicBufferProducer> producer;
204 sp<IGraphicBufferConsumer> consumer;
205 BufferQueue::createBufferQueue(&producer, &consumer);
206 sp<GLConsumer> glc = new GLConsumer(consumer, name,
207 GL_TEXTURE_EXTERNAL_OES, false, true);
208 glc->setDefaultBufferSize(w, h);
209 producer->setMaxDequeuedBufferCount(2);
210 glc->setConsumerUsageBits(GRALLOC_USAGE_HW_COMPOSER);
211
212 sp<ANativeWindow> anw = new Surface(producer);
213 EGLSurface s = eglCreateWindowSurface(mDisplay, mConfig, anw.get(), nullptr);
214 if (s == EGL_NO_SURFACE) {
215 fprintf(stderr, "eglCreateWindowSurface error: %#x\n", eglGetError());
216 return false;
217 }
218
219 *glConsumer = glc;
220 *surface = s;
221 return true;
222 }
223
computeWindowScale(uint32_t w,uint32_t h,float * scale)224 bool GLHelper::computeWindowScale(uint32_t w, uint32_t h, float* scale) {
225 const sp<IBinder> dpy = mSurfaceComposerClient->getInternalDisplayToken();
226 if (dpy == nullptr) {
227 fprintf(stderr, "SurfaceComposer::getInternalDisplayToken failed.\n");
228 return false;
229 }
230
231 DisplayInfo info;
232 status_t err = mSurfaceComposerClient->getDisplayInfo(dpy, &info);
233 if (err != NO_ERROR) {
234 fprintf(stderr, "SurfaceComposer::getDisplayInfo failed: %#x\n", err);
235 return false;
236 }
237
238 float scaleX = float(info.w) / float(w);
239 float scaleY = float(info.h) / float(h);
240 *scale = scaleX < scaleY ? scaleX : scaleY;
241
242 return true;
243 }
244
createWindowSurface(uint32_t w,uint32_t h,sp<SurfaceControl> * surfaceControl,EGLSurface * surface)245 bool GLHelper::createWindowSurface(uint32_t w, uint32_t h,
246 sp<SurfaceControl>* surfaceControl, EGLSurface* surface) {
247 bool result;
248 status_t err;
249
250 if (mSurfaceComposerClient == nullptr) {
251 mSurfaceComposerClient = new SurfaceComposerClient;
252 }
253 err = mSurfaceComposerClient->initCheck();
254 if (err != NO_ERROR) {
255 fprintf(stderr, "SurfaceComposerClient::initCheck error: %#x\n", err);
256 return false;
257 }
258
259 sp<SurfaceControl> sc = mSurfaceComposerClient->createSurface(
260 String8("Benchmark"), w, h, PIXEL_FORMAT_RGBA_8888, 0);
261 if (sc == nullptr || !sc->isValid()) {
262 fprintf(stderr, "Failed to create SurfaceControl.\n");
263 return false;
264 }
265
266 float scale;
267 result = computeWindowScale(w, h, &scale);
268 if (!result) {
269 return false;
270 }
271
272 SurfaceComposerClient::Transaction{}.setLayer(sc, 0x7FFFFFFF)
273 .setMatrix(sc, scale, 0.0f, 0.0f, scale)
274 .show(sc)
275 .apply();
276
277 sp<ANativeWindow> anw = sc->getSurface();
278 EGLSurface s = eglCreateWindowSurface(mDisplay, mConfig, anw.get(), nullptr);
279 if (s == EGL_NO_SURFACE) {
280 fprintf(stderr, "eglCreateWindowSurface error: %#x\n", eglGetError());
281 return false;
282 }
283
284 *surfaceControl = sc;
285 *surface = s;
286 return true;
287 }
288
compileShader(GLenum shaderType,const char * src,GLuint * outShader)289 static bool compileShader(GLenum shaderType, const char* src,
290 GLuint* outShader) {
291 GLuint shader = glCreateShader(shaderType);
292 if (shader == 0) {
293 fprintf(stderr, "glCreateShader error: %#x\n", glGetError());
294 return false;
295 }
296
297 glShaderSource(shader, 1, &src, nullptr);
298 glCompileShader(shader);
299
300 GLint compiled = 0;
301 glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
302 if (!compiled) {
303 GLint infoLen = 0;
304 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
305 if (infoLen) {
306 char* buf = new char[infoLen];
307 if (buf) {
308 glGetShaderInfoLog(shader, infoLen, nullptr, buf);
309 fprintf(stderr, "Shader compile log:\n%s\n", buf);
310 delete[] buf;
311 }
312 }
313 glDeleteShader(shader);
314 return false;
315 }
316 *outShader = shader;
317 return true;
318 }
319
printShaderSource(const char * const * src)320 static void printShaderSource(const char* const* src) {
321 for (size_t i = 0; i < MAX_SHADER_LINES && src[i] != nullptr; i++) {
322 fprintf(stderr, "%3zu: %s\n", i+1, src[i]);
323 }
324 }
325
makeShaderString(const char * const * src)326 static const char* makeShaderString(const char* const* src) {
327 size_t len = 0;
328 for (size_t i = 0; i < MAX_SHADER_LINES && src[i] != nullptr; i++) {
329 // The +1 is for the '\n' that will be added.
330 len += strlen(src[i]) + 1;
331 }
332
333 char* result = new char[len+1];
334 char* end = result;
335 for (size_t i = 0; i < MAX_SHADER_LINES && src[i] != nullptr; i++) {
336 strcpy(end, src[i]);
337 end += strlen(src[i]);
338 *end = '\n';
339 end++;
340 }
341 *end = '\0';
342
343 return result;
344 }
345
compileShaderLines(GLenum shaderType,const char * const * lines,GLuint * outShader)346 static bool compileShaderLines(GLenum shaderType, const char* const* lines,
347 GLuint* outShader) {
348 const char* src = makeShaderString(lines);
349 bool result = compileShader(shaderType, src, outShader);
350 if (!result) {
351 fprintf(stderr, "Shader source:\n");
352 printShaderSource(lines);
353 delete[] src;
354 return false;
355 }
356 delete[] src;
357
358 return true;
359 }
360
linkShaderProgram(GLuint vs,GLuint fs,GLuint * outPgm)361 static bool linkShaderProgram(GLuint vs, GLuint fs, GLuint* outPgm) {
362 GLuint program = glCreateProgram();
363 if (program == 0) {
364 fprintf(stderr, "glCreateProgram error: %#x\n", glGetError());
365 return false;
366 }
367
368 glAttachShader(program, vs);
369 glAttachShader(program, fs);
370 glLinkProgram(program);
371 GLint linkStatus = GL_FALSE;
372 glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
373 if (linkStatus != GL_TRUE) {
374 GLint bufLength = 0;
375 glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
376 if (bufLength) {
377 char* buf = new char[bufLength];
378 if (buf) {
379 glGetProgramInfoLog(program, bufLength, nullptr, buf);
380 fprintf(stderr, "Program link log:\n%s\n", buf);
381 delete[] buf;
382 }
383 }
384 glDeleteProgram(program);
385 program = 0;
386 }
387
388 *outPgm = program;
389 return program != 0;
390 }
391
setUpShaders(const ShaderDesc * shaderDescs,size_t numShaders)392 bool GLHelper::setUpShaders(const ShaderDesc* shaderDescs, size_t numShaders) {
393 mShaderPrograms = new GLuint[numShaders];
394 bool result = true;
395
396 for (size_t i = 0; i < numShaders && result; i++) {
397 GLuint vs, fs;
398
399 result = compileShaderLines(GL_VERTEX_SHADER,
400 shaderDescs[i].vertexShader, &vs);
401 if (!result) {
402 return false;
403 }
404
405 result = compileShaderLines(GL_FRAGMENT_SHADER,
406 shaderDescs[i].fragmentShader, &fs);
407 if (!result) {
408 glDeleteShader(vs);
409 return false;
410 }
411
412 result = linkShaderProgram(vs, fs, &mShaderPrograms[i]);
413 glDeleteShader(vs);
414 glDeleteShader(fs);
415 }
416
417 mNumShaders = numShaders;
418 mShaderDescs = shaderDescs;
419
420 return result;
421 }
422
getDitherTexture(GLuint * outTexName)423 bool GLHelper::getDitherTexture(GLuint* outTexName) {
424 if (mDitherTexture == 0) {
425 const uint8_t pattern[] = {
426 0, 8, 2, 10,
427 12, 4, 14, 6,
428 3, 11, 1, 9,
429 15, 7, 13, 5
430 };
431
432 glGenTextures(1, &mDitherTexture);
433 glBindTexture(GL_TEXTURE_2D, mDitherTexture);
434
435 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
436 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
437
438 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
439 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
440
441 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, DITHER_KERNEL_SIZE,
442 DITHER_KERNEL_SIZE, 0, GL_ALPHA, GL_UNSIGNED_BYTE, &pattern);
443 }
444
445 *outTexName = mDitherTexture;
446
447 return true;
448 }
449
450 }
451