1 /*
2 * Copyright (C) 2011 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 #define LOG_TAG "OpenGLRenderer"
18
19 #include <ui/Rect.h>
20
21 #include "LayerCache.h"
22 #include "LayerRenderer.h"
23 #include "Matrix.h"
24 #include "Properties.h"
25 #include "Rect.h"
26
27 namespace android {
28 namespace uirenderer {
29
30 ///////////////////////////////////////////////////////////////////////////////
31 // Rendering
32 ///////////////////////////////////////////////////////////////////////////////
33
LayerRenderer(Layer * layer)34 LayerRenderer::LayerRenderer(Layer* layer): mLayer(layer) {
35 }
36
~LayerRenderer()37 LayerRenderer::~LayerRenderer() {
38 }
39
prepareDirty(float left,float top,float right,float bottom,bool opaque)40 int LayerRenderer::prepareDirty(float left, float top, float right, float bottom, bool opaque) {
41 LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->getFbo());
42
43 glBindFramebuffer(GL_FRAMEBUFFER, mLayer->getFbo());
44
45 const float width = mLayer->layer.getWidth();
46 const float height = mLayer->layer.getHeight();
47
48 #if RENDER_LAYERS_AS_REGIONS
49 Rect dirty(left, top, right, bottom);
50 if (dirty.isEmpty() || (dirty.left <= 0 && dirty.top <= 0 &&
51 dirty.right >= width && dirty.bottom >= height)) {
52 mLayer->region.clear();
53 dirty.set(0.0f, 0.0f, width, height);
54 } else {
55 dirty.intersect(0.0f, 0.0f, width, height);
56 android::Rect r(dirty.left, dirty.top, dirty.right, dirty.bottom);
57 mLayer->region.subtractSelf(r);
58 }
59
60 return OpenGLRenderer::prepareDirty(dirty.left, dirty.top, dirty.right, dirty.bottom, opaque);
61 #else
62 return OpenGLRenderer::prepareDirty(0.0f, 0.0f, width, height, opaque);
63 #endif
64 }
65
finish()66 void LayerRenderer::finish() {
67 OpenGLRenderer::finish();
68
69 generateMesh();
70
71 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->getFbo());
72
73 // No need to unbind our FBO, this will be taken care of by the caller
74 // who will invoke OpenGLRenderer::resume()
75 }
76
getTargetFbo()77 GLint LayerRenderer::getTargetFbo() {
78 return mLayer->getFbo();
79 }
80
81 ///////////////////////////////////////////////////////////////////////////////
82 // Dirty region tracking
83 ///////////////////////////////////////////////////////////////////////////////
84
hasLayer()85 bool LayerRenderer::hasLayer() {
86 return true;
87 }
88
getRegion()89 Region* LayerRenderer::getRegion() {
90 #if RENDER_LAYERS_AS_REGIONS
91 if (getSnapshot()->flags & Snapshot::kFlagFboTarget) {
92 return OpenGLRenderer::getRegion();
93 }
94 return &mLayer->region;
95 #else
96 return OpenGLRenderer::getRegion();
97 #endif
98 }
99
100 // TODO: This implementation is flawed and can generate T-junctions
101 // in the mesh, which will in turn produce cracks when the
102 // mesh is rotated/skewed. The easiest way to fix this would
103 // be, for each row, to add new vertices shared with the previous
104 // row when the two rows share an edge.
105 // In practice, T-junctions do not appear often so this has yet
106 // to be fixed.
generateMesh()107 void LayerRenderer::generateMesh() {
108 #if RENDER_LAYERS_AS_REGIONS
109 if (mLayer->region.isRect() || mLayer->region.isEmpty()) {
110 if (mLayer->mesh) {
111 delete mLayer->mesh;
112 delete mLayer->meshIndices;
113
114 mLayer->mesh = NULL;
115 mLayer->meshIndices = NULL;
116 mLayer->meshElementCount = 0;
117 }
118
119 mLayer->setRegionAsRect();
120 return;
121 }
122
123 size_t count;
124 const android::Rect* rects = mLayer->region.getArray(&count);
125
126 GLsizei elementCount = count * 6;
127
128 if (mLayer->mesh && mLayer->meshElementCount < elementCount) {
129 delete mLayer->mesh;
130 delete mLayer->meshIndices;
131
132 mLayer->mesh = NULL;
133 mLayer->meshIndices = NULL;
134 }
135
136 bool rebuildIndices = false;
137 if (!mLayer->mesh) {
138 mLayer->mesh = new TextureVertex[count * 4];
139 mLayer->meshIndices = new uint16_t[elementCount];
140 rebuildIndices = true;
141 }
142 mLayer->meshElementCount = elementCount;
143
144 const float texX = 1.0f / float(mLayer->getWidth());
145 const float texY = 1.0f / float(mLayer->getHeight());
146 const float height = mLayer->layer.getHeight();
147
148 TextureVertex* mesh = mLayer->mesh;
149 uint16_t* indices = mLayer->meshIndices;
150
151 for (size_t i = 0; i < count; i++) {
152 const android::Rect* r = &rects[i];
153
154 const float u1 = r->left * texX;
155 const float v1 = (height - r->top) * texY;
156 const float u2 = r->right * texX;
157 const float v2 = (height - r->bottom) * texY;
158
159 TextureVertex::set(mesh++, r->left, r->top, u1, v1);
160 TextureVertex::set(mesh++, r->right, r->top, u2, v1);
161 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2);
162 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2);
163
164 if (rebuildIndices) {
165 uint16_t quad = i * 4;
166 int index = i * 6;
167 indices[index ] = quad; // top-left
168 indices[index + 1] = quad + 1; // top-right
169 indices[index + 2] = quad + 2; // bottom-left
170 indices[index + 3] = quad + 2; // bottom-left
171 indices[index + 4] = quad + 1; // top-right
172 indices[index + 5] = quad + 3; // bottom-right
173 }
174 }
175 #endif
176 }
177
178 ///////////////////////////////////////////////////////////////////////////////
179 // Layers management
180 ///////////////////////////////////////////////////////////////////////////////
181
createLayer(uint32_t width,uint32_t height,bool isOpaque)182 Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) {
183 LAYER_RENDERER_LOGD("Requesting new render layer %dx%d", width, height);
184
185 Caches& caches = Caches::getInstance();
186 GLuint fbo = caches.fboCache.get();
187 if (!fbo) {
188 ALOGW("Could not obtain an FBO");
189 return NULL;
190 }
191
192 caches.activeTexture(0);
193 Layer* layer = caches.layerCache.get(width, height);
194 if (!layer) {
195 ALOGW("Could not obtain a layer");
196 return NULL;
197 }
198
199 layer->setFbo(fbo);
200 layer->layer.set(0.0f, 0.0f, width, height);
201 layer->texCoords.set(0.0f, height / float(layer->getHeight()),
202 width / float(layer->getWidth()), 0.0f);
203 layer->setAlpha(255, SkXfermode::kSrcOver_Mode);
204 layer->setBlend(!isOpaque);
205 layer->setColorFilter(NULL);
206 layer->region.clear();
207
208 GLuint previousFbo;
209 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
210
211 glBindFramebuffer(GL_FRAMEBUFFER, layer->getFbo());
212 layer->bindTexture();
213
214 // Initialize the texture if needed
215 if (layer->isEmpty()) {
216 layer->setEmpty(false);
217 layer->allocateTexture(GL_RGBA, GL_UNSIGNED_BYTE);
218
219 if (glGetError() != GL_NO_ERROR) {
220 ALOGD("Could not allocate texture for layer (fbo=%d %dx%d)",
221 fbo, width, height);
222
223 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
224 caches.fboCache.put(fbo);
225
226 layer->deleteTexture();
227 delete layer;
228
229 return NULL;
230 }
231 }
232
233 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
234 layer->getTexture(), 0);
235
236 glDisable(GL_SCISSOR_TEST);
237 glClear(GL_COLOR_BUFFER_BIT);
238 glEnable(GL_SCISSOR_TEST);
239
240 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
241
242 return layer;
243 }
244
resizeLayer(Layer * layer,uint32_t width,uint32_t height)245 bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) {
246 if (layer) {
247 LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->getFbo(), width, height);
248
249 if (Caches::getInstance().layerCache.resize(layer, width, height)) {
250 layer->layer.set(0.0f, 0.0f, width, height);
251 layer->texCoords.set(0.0f, height / float(layer->getHeight()),
252 width / float(layer->getWidth()), 0.0f);
253 } else {
254 layer->deleteTexture();
255 delete layer;
256 return false;
257 }
258 }
259
260 return true;
261 }
262
createTextureLayer(bool isOpaque)263 Layer* LayerRenderer::createTextureLayer(bool isOpaque) {
264 LAYER_RENDERER_LOGD("Creating new texture layer");
265
266 Layer* layer = new Layer(0, 0);
267 layer->setCacheable(false);
268 layer->setTextureLayer(true);
269 layer->setBlend(!isOpaque);
270 layer->setEmpty(true);
271 layer->setFbo(0);
272 layer->setAlpha(255, SkXfermode::kSrcOver_Mode);
273 layer->layer.set(0.0f, 0.0f, 0.0f, 0.0f);
274 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f);
275 layer->region.clear();
276 layer->setRenderTarget(GL_NONE); // see ::updateTextureLayer()
277
278 Caches::getInstance().activeTexture(0);
279 layer->generateTexture();
280
281 return layer;
282 }
283
updateTextureLayer(Layer * layer,uint32_t width,uint32_t height,bool isOpaque,GLenum renderTarget,float * transform)284 void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height,
285 bool isOpaque, GLenum renderTarget, float* transform) {
286 if (layer) {
287 layer->setBlend(!isOpaque);
288 layer->setSize(width, height);
289 layer->layer.set(0.0f, 0.0f, width, height);
290 layer->region.set(width, height);
291 layer->regionRect.set(0.0f, 0.0f, width, height);
292 layer->getTexTransform().load(transform);
293
294 if (renderTarget != layer->getRenderTarget()) {
295 layer->setRenderTarget(renderTarget);
296 layer->bindTexture();
297 layer->setFilter(GL_NEAREST, false, true);
298 layer->setWrap(GL_CLAMP_TO_EDGE, false, true);
299 }
300 }
301 }
302
destroyLayer(Layer * layer)303 void LayerRenderer::destroyLayer(Layer* layer) {
304 if (layer) {
305 LAYER_RENDERER_LOGD("Recycling layer, %dx%d fbo = %d",
306 layer->getWidth(), layer->getHeight(), layer->getFbo());
307
308 GLuint fbo = layer->getFbo();
309 if (fbo) {
310 flushLayer(layer);
311 Caches::getInstance().fboCache.put(fbo);
312 layer->setFbo(0);
313 }
314
315 if (!Caches::getInstance().layerCache.put(layer)) {
316 LAYER_RENDERER_LOGD(" Destroyed!");
317 layer->deleteTexture();
318 delete layer;
319 } else {
320 LAYER_RENDERER_LOGD(" Cached!");
321 #if DEBUG_LAYER_RENDERER
322 Caches::getInstance().layerCache.dump();
323 #endif
324 layer->region.clear();
325 }
326 }
327 }
328
destroyLayerDeferred(Layer * layer)329 void LayerRenderer::destroyLayerDeferred(Layer* layer) {
330 if (layer) {
331 LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->getFbo());
332
333 Caches::getInstance().deleteLayerDeferred(layer);
334 }
335 }
336
flushLayer(Layer * layer)337 void LayerRenderer::flushLayer(Layer* layer) {
338 #ifdef GL_EXT_discard_framebuffer
339 GLuint fbo = layer->getFbo();
340 if (layer && fbo) {
341 // If possible, discard any enqueud operations on deferred
342 // rendering architectures
343 if (Caches::getInstance().extensions.hasDiscardFramebuffer()) {
344 GLuint previousFbo;
345 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
346
347 GLenum attachments = GL_COLOR_ATTACHMENT0;
348 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
349 glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, &attachments);
350
351 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
352 }
353 }
354 #endif
355 }
356
copyLayer(Layer * layer,SkBitmap * bitmap)357 bool LayerRenderer::copyLayer(Layer* layer, SkBitmap* bitmap) {
358 Caches& caches = Caches::getInstance();
359 if (layer && layer->isTextureLayer() && bitmap->width() <= caches.maxTextureSize &&
360 bitmap->height() <= caches.maxTextureSize) {
361
362 GLuint fbo = caches.fboCache.get();
363 if (!fbo) {
364 ALOGW("Could not obtain an FBO");
365 return false;
366 }
367
368 SkAutoLockPixels alp(*bitmap);
369
370 GLuint texture;
371 GLuint previousFbo;
372
373 GLenum format;
374 GLenum type;
375
376 GLenum error = GL_NO_ERROR;
377 bool status = false;
378
379 switch (bitmap->config()) {
380 case SkBitmap::kA8_Config:
381 format = GL_ALPHA;
382 type = GL_UNSIGNED_BYTE;
383 break;
384 case SkBitmap::kRGB_565_Config:
385 format = GL_RGB;
386 type = GL_UNSIGNED_SHORT_5_6_5;
387 break;
388 case SkBitmap::kARGB_4444_Config:
389 format = GL_RGBA;
390 type = GL_UNSIGNED_SHORT_4_4_4_4;
391 break;
392 case SkBitmap::kARGB_8888_Config:
393 default:
394 format = GL_RGBA;
395 type = GL_UNSIGNED_BYTE;
396 break;
397 }
398
399 float alpha = layer->getAlpha();
400 SkXfermode::Mode mode = layer->getMode();
401
402 layer->setAlpha(255, SkXfermode::kSrc_Mode);
403 layer->setFbo(fbo);
404
405 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
406 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
407
408 glGenTextures(1, &texture);
409 if ((error = glGetError()) != GL_NO_ERROR) goto error;
410
411 caches.activeTexture(0);
412 glBindTexture(GL_TEXTURE_2D, texture);
413
414 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
415 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
416
417 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
418 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
419
420 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(),
421 0, format, type, NULL);
422 if ((error = glGetError()) != GL_NO_ERROR) goto error;
423
424 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
425 GL_TEXTURE_2D, texture, 0);
426 if ((error = glGetError()) != GL_NO_ERROR) goto error;
427
428 {
429 LayerRenderer renderer(layer);
430 renderer.setViewport(bitmap->width(), bitmap->height());
431 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f,
432 bitmap->width(), bitmap->height(), !layer->isBlend());
433
434 glDisable(GL_SCISSOR_TEST);
435 renderer.translate(0.0f, bitmap->height());
436 renderer.scale(1.0f, -1.0f);
437
438 mat4 texTransform(layer->getTexTransform());
439
440 mat4 invert;
441 invert.translate(0.0f, 1.0f, 0.0f);
442 invert.scale(1.0f, -1.0f, 1.0f);
443 layer->getTexTransform().multiply(invert);
444
445 if ((error = glGetError()) != GL_NO_ERROR) goto error;
446
447 {
448 Rect bounds;
449 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height());
450 renderer.drawTextureLayer(layer, bounds);
451
452 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format,
453 type, bitmap->getPixels());
454
455 if ((error = glGetError()) != GL_NO_ERROR) goto error;
456 }
457
458 layer->getTexTransform().load(texTransform);
459 status = true;
460 }
461
462 error:
463 glEnable(GL_SCISSOR_TEST);
464
465 #if DEBUG_OPENGL
466 if (error != GL_NO_ERROR) {
467 ALOGD("GL error while copying layer into bitmap = 0x%x", error);
468 }
469 #endif
470
471 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
472 layer->setAlpha(alpha, mode);
473 layer->setFbo(0);
474 glDeleteTextures(1, &texture);
475 caches.fboCache.put(fbo);
476
477 return status;
478 }
479 return false;
480 }
481
482 }; // namespace uirenderer
483 }; // namespace android
484