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