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 <private/hwui/DrawGlInfo.h>
22
23 #include "LayerCache.h"
24 #include "LayerRenderer.h"
25 #include "Matrix.h"
26 #include "Properties.h"
27 #include "Rect.h"
28
29 namespace android {
30 namespace uirenderer {
31
32 ///////////////////////////////////////////////////////////////////////////////
33 // Rendering
34 ///////////////////////////////////////////////////////////////////////////////
35
LayerRenderer(Layer * layer)36 LayerRenderer::LayerRenderer(Layer* layer): mLayer(layer) {
37 }
38
~LayerRenderer()39 LayerRenderer::~LayerRenderer() {
40 }
41
setViewport(int width,int height)42 void LayerRenderer::setViewport(int width, int height) {
43 initViewport(width, height);
44 }
45
prepareDirty(float left,float top,float right,float bottom,bool opaque)46 status_t LayerRenderer::prepareDirty(float left, float top, float right, float bottom,
47 bool opaque) {
48 LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->getFbo());
49
50 glBindFramebuffer(GL_FRAMEBUFFER, mLayer->getFbo());
51
52 const float width = mLayer->layer.getWidth();
53 const float height = mLayer->layer.getHeight();
54
55 Rect dirty(left, top, right, bottom);
56 if (dirty.isEmpty() || (dirty.left <= 0 && dirty.top <= 0 &&
57 dirty.right >= width && dirty.bottom >= height)) {
58 mLayer->region.clear();
59 dirty.set(0.0f, 0.0f, width, height);
60 } else {
61 dirty.intersect(0.0f, 0.0f, width, height);
62 android::Rect r(dirty.left, dirty.top, dirty.right, dirty.bottom);
63 mLayer->region.subtractSelf(r);
64 }
65
66 return OpenGLRenderer::prepareDirty(dirty.left, dirty.top, dirty.right, dirty.bottom, opaque);
67 }
68
clear(float left,float top,float right,float bottom,bool opaque)69 status_t LayerRenderer::clear(float left, float top, float right, float bottom, bool opaque) {
70 if (mLayer->isDirty()) {
71 getCaches().disableScissor();
72 glClear(GL_COLOR_BUFFER_BIT);
73
74 getCaches().resetScissor();
75 mLayer->setDirty(false);
76
77 return DrawGlInfo::kStatusDone;
78 }
79
80 return OpenGLRenderer::clear(left, top, right, bottom, opaque);
81 }
82
finish()83 void LayerRenderer::finish() {
84 OpenGLRenderer::finish();
85
86 generateMesh();
87
88 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->getFbo());
89
90 // No need to unbind our FBO, this will be taken care of by the caller
91 // who will invoke OpenGLRenderer::resume()
92 }
93
getTargetFbo()94 GLint LayerRenderer::getTargetFbo() {
95 return mLayer->getFbo();
96 }
97
suppressErrorChecks()98 bool LayerRenderer::suppressErrorChecks() {
99 return true;
100 }
101
102 ///////////////////////////////////////////////////////////////////////////////
103 // Dirty region tracking
104 ///////////////////////////////////////////////////////////////////////////////
105
hasLayer()106 bool LayerRenderer::hasLayer() {
107 return true;
108 }
109
getRegion()110 Region* LayerRenderer::getRegion() {
111 if (getSnapshot()->flags & Snapshot::kFlagFboTarget) {
112 return OpenGLRenderer::getRegion();
113 }
114 return &mLayer->region;
115 }
116
117 // TODO: This implementation is flawed and can generate T-junctions
118 // in the mesh, which will in turn produce cracks when the
119 // mesh is rotated/skewed. The easiest way to fix this would
120 // be, for each row, to add new vertices shared with the previous
121 // row when the two rows share an edge.
122 // In practice, T-junctions do not appear often so this has yet
123 // to be fixed.
generateMesh()124 void LayerRenderer::generateMesh() {
125 if (mLayer->region.isRect() || mLayer->region.isEmpty()) {
126 if (mLayer->mesh) {
127 delete mLayer->mesh;
128 delete mLayer->meshIndices;
129
130 mLayer->mesh = NULL;
131 mLayer->meshIndices = NULL;
132 mLayer->meshElementCount = 0;
133 }
134
135 mLayer->setRegionAsRect();
136 return;
137 }
138
139 size_t count;
140 const android::Rect* rects = mLayer->region.getArray(&count);
141
142 GLsizei elementCount = count * 6;
143
144 if (mLayer->mesh && mLayer->meshElementCount < elementCount) {
145 delete mLayer->mesh;
146 delete mLayer->meshIndices;
147
148 mLayer->mesh = NULL;
149 mLayer->meshIndices = NULL;
150 }
151
152 bool rebuildIndices = false;
153 if (!mLayer->mesh) {
154 mLayer->mesh = new TextureVertex[count * 4];
155 mLayer->meshIndices = new uint16_t[elementCount];
156 rebuildIndices = true;
157 }
158 mLayer->meshElementCount = elementCount;
159
160 const float texX = 1.0f / float(mLayer->getWidth());
161 const float texY = 1.0f / float(mLayer->getHeight());
162 const float height = mLayer->layer.getHeight();
163
164 TextureVertex* mesh = mLayer->mesh;
165 uint16_t* indices = mLayer->meshIndices;
166
167 for (size_t i = 0; i < count; i++) {
168 const android::Rect* r = &rects[i];
169
170 const float u1 = r->left * texX;
171 const float v1 = (height - r->top) * texY;
172 const float u2 = r->right * texX;
173 const float v2 = (height - r->bottom) * texY;
174
175 TextureVertex::set(mesh++, r->left, r->top, u1, v1);
176 TextureVertex::set(mesh++, r->right, r->top, u2, v1);
177 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2);
178 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2);
179
180 if (rebuildIndices) {
181 uint16_t quad = i * 4;
182 int index = i * 6;
183 indices[index ] = quad; // top-left
184 indices[index + 1] = quad + 1; // top-right
185 indices[index + 2] = quad + 2; // bottom-left
186 indices[index + 3] = quad + 2; // bottom-left
187 indices[index + 4] = quad + 1; // top-right
188 indices[index + 5] = quad + 3; // bottom-right
189 }
190 }
191 }
192
193 ///////////////////////////////////////////////////////////////////////////////
194 // Layers management
195 ///////////////////////////////////////////////////////////////////////////////
196
createLayer(uint32_t width,uint32_t height,bool isOpaque)197 Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) {
198 LAYER_RENDERER_LOGD("Requesting new render layer %dx%d", width, height);
199
200 Caches& caches = Caches::getInstance();
201 GLuint fbo = caches.fboCache.get();
202 if (!fbo) {
203 ALOGW("Could not obtain an FBO");
204 return NULL;
205 }
206
207 caches.activeTexture(0);
208 Layer* layer = caches.layerCache.get(width, height);
209 if (!layer) {
210 ALOGW("Could not obtain a layer");
211 return NULL;
212 }
213
214 layer->setFbo(fbo);
215 layer->layer.set(0.0f, 0.0f, width, height);
216 layer->texCoords.set(0.0f, height / float(layer->getHeight()),
217 width / float(layer->getWidth()), 0.0f);
218 layer->setAlpha(255, SkXfermode::kSrcOver_Mode);
219 layer->setBlend(!isOpaque);
220 layer->setColorFilter(NULL);
221 layer->setDirty(true);
222 layer->region.clear();
223
224 GLuint previousFbo;
225 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
226
227 glBindFramebuffer(GL_FRAMEBUFFER, layer->getFbo());
228 layer->bindTexture();
229
230 // Initialize the texture if needed
231 if (layer->isEmpty()) {
232 layer->setEmpty(false);
233 layer->allocateTexture(GL_RGBA, GL_UNSIGNED_BYTE);
234
235 if (glGetError() != GL_NO_ERROR) {
236 ALOGD("Could not allocate texture for layer (fbo=%d %dx%d)",
237 fbo, width, height);
238
239 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
240
241 Caches::getInstance().resourceCache.decrementRefcount(layer);
242
243 return NULL;
244 }
245 }
246
247 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
248 layer->getTexture(), 0);
249
250 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
251
252 return layer;
253 }
254
resizeLayer(Layer * layer,uint32_t width,uint32_t height)255 bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) {
256 if (layer) {
257 LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->getFbo(), width, height);
258
259 if (Caches::getInstance().layerCache.resize(layer, width, height)) {
260 layer->layer.set(0.0f, 0.0f, width, height);
261 layer->texCoords.set(0.0f, height / float(layer->getHeight()),
262 width / float(layer->getWidth()), 0.0f);
263 } else {
264 Caches::getInstance().resourceCache.decrementRefcount(layer);
265 return false;
266 }
267 }
268
269 return true;
270 }
271
createTextureLayer(bool isOpaque)272 Layer* LayerRenderer::createTextureLayer(bool isOpaque) {
273 LAYER_RENDERER_LOGD("Creating new texture layer");
274
275 Layer* layer = new Layer(0, 0);
276 layer->setCacheable(false);
277 layer->setTextureLayer(true);
278 layer->setBlend(!isOpaque);
279 layer->setEmpty(true);
280 layer->setFbo(0);
281 layer->setAlpha(255, SkXfermode::kSrcOver_Mode);
282 layer->layer.set(0.0f, 0.0f, 0.0f, 0.0f);
283 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f);
284 layer->region.clear();
285 layer->setRenderTarget(GL_NONE); // see ::updateTextureLayer()
286
287 Caches::getInstance().activeTexture(0);
288 layer->generateTexture();
289
290 return layer;
291 }
292
updateTextureLayer(Layer * layer,uint32_t width,uint32_t height,bool isOpaque,GLenum renderTarget,float * transform)293 void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height,
294 bool isOpaque, GLenum renderTarget, float* transform) {
295 if (layer) {
296 layer->setBlend(!isOpaque);
297 layer->setSize(width, height);
298 layer->layer.set(0.0f, 0.0f, width, height);
299 layer->region.set(width, height);
300 layer->regionRect.set(0.0f, 0.0f, width, height);
301 layer->getTexTransform().load(transform);
302
303 if (renderTarget != layer->getRenderTarget()) {
304 layer->setRenderTarget(renderTarget);
305 layer->bindTexture();
306 layer->setFilter(GL_NEAREST, false, true);
307 layer->setWrap(GL_CLAMP_TO_EDGE, false, true);
308 }
309 }
310 }
311
destroyLayer(Layer * layer)312 void LayerRenderer::destroyLayer(Layer* layer) {
313 if (layer) {
314 LAYER_RENDERER_LOGD("Recycling layer, %dx%d fbo = %d",
315 layer->getWidth(), layer->getHeight(), layer->getFbo());
316
317 if (!Caches::getInstance().layerCache.put(layer)) {
318 LAYER_RENDERER_LOGD(" Destroyed!");
319 Caches::getInstance().resourceCache.decrementRefcount(layer);
320 } else {
321 LAYER_RENDERER_LOGD(" Cached!");
322 #if DEBUG_LAYER_RENDERER
323 Caches::getInstance().layerCache.dump();
324 #endif
325 layer->removeFbo();
326 layer->region.clear();
327 }
328 }
329 }
330
destroyLayerDeferred(Layer * layer)331 void LayerRenderer::destroyLayerDeferred(Layer* layer) {
332 if (layer) {
333 LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->getFbo());
334
335 Caches::getInstance().deleteLayerDeferred(layer);
336 }
337 }
338
flushLayer(Layer * layer)339 void LayerRenderer::flushLayer(Layer* layer) {
340 #ifdef GL_EXT_discard_framebuffer
341 GLuint fbo = layer->getFbo();
342 if (layer && fbo) {
343 // If possible, discard any enqueud operations on deferred
344 // rendering architectures
345 if (Caches::getInstance().extensions.hasDiscardFramebuffer()) {
346 GLuint previousFbo;
347 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
348 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
349
350 const GLenum attachments[] = { GL_COLOR_ATTACHMENT0 };
351 glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, attachments);
352
353 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
354 }
355 }
356 #endif
357 }
358
copyLayer(Layer * layer,SkBitmap * bitmap)359 bool LayerRenderer::copyLayer(Layer* layer, SkBitmap* bitmap) {
360 Caches& caches = Caches::getInstance();
361 if (layer && bitmap->width() <= caches.maxTextureSize &&
362 bitmap->height() <= caches.maxTextureSize) {
363
364 GLuint fbo = caches.fboCache.get();
365 if (!fbo) {
366 ALOGW("Could not obtain an FBO");
367 return false;
368 }
369
370 SkAutoLockPixels alp(*bitmap);
371
372 GLuint texture;
373 GLuint previousFbo;
374 GLuint previousViewport[4];
375
376 GLenum format;
377 GLenum type;
378
379 GLenum error = GL_NO_ERROR;
380 bool status = false;
381
382 switch (bitmap->config()) {
383 case SkBitmap::kA8_Config:
384 format = GL_ALPHA;
385 type = GL_UNSIGNED_BYTE;
386 break;
387 case SkBitmap::kRGB_565_Config:
388 format = GL_RGB;
389 type = GL_UNSIGNED_SHORT_5_6_5;
390 break;
391 case SkBitmap::kARGB_4444_Config:
392 format = GL_RGBA;
393 type = GL_UNSIGNED_SHORT_4_4_4_4;
394 break;
395 case SkBitmap::kARGB_8888_Config:
396 default:
397 format = GL_RGBA;
398 type = GL_UNSIGNED_BYTE;
399 break;
400 }
401
402 float alpha = layer->getAlpha();
403 SkXfermode::Mode mode = layer->getMode();
404 GLuint previousLayerFbo = layer->getFbo();
405
406 layer->setAlpha(255, SkXfermode::kSrc_Mode);
407 layer->setFbo(fbo);
408
409 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
410 glGetIntegerv(GL_VIEWPORT, (GLint*) &previousViewport);
411 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
412
413 glGenTextures(1, &texture);
414 if ((error = glGetError()) != GL_NO_ERROR) goto error;
415
416 caches.activeTexture(0);
417 glBindTexture(GL_TEXTURE_2D, texture);
418
419 glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel());
420
421 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
422 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
423
424 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
425 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
426
427 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(),
428 0, format, type, NULL);
429 if ((error = glGetError()) != GL_NO_ERROR) goto error;
430
431 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
432 GL_TEXTURE_2D, texture, 0);
433 if ((error = glGetError()) != GL_NO_ERROR) goto error;
434
435 {
436 LayerRenderer renderer(layer);
437 renderer.setViewport(bitmap->width(), bitmap->height());
438 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f,
439 bitmap->width(), bitmap->height(), !layer->isBlend());
440
441 caches.disableScissor();
442 renderer.translate(0.0f, bitmap->height());
443 renderer.scale(1.0f, -1.0f);
444
445 mat4 texTransform(layer->getTexTransform());
446
447 mat4 invert;
448 invert.translate(0.0f, 1.0f, 0.0f);
449 invert.scale(1.0f, -1.0f, 1.0f);
450 layer->getTexTransform().multiply(invert);
451
452 if ((error = glGetError()) != GL_NO_ERROR) goto error;
453
454 {
455 Rect bounds;
456 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height());
457 renderer.drawTextureLayer(layer, bounds);
458
459 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format,
460 type, bitmap->getPixels());
461
462 if ((error = glGetError()) != GL_NO_ERROR) goto error;
463 }
464
465 layer->getTexTransform().load(texTransform);
466 status = true;
467 }
468
469 error:
470 #if DEBUG_OPENGL
471 if (error != GL_NO_ERROR) {
472 ALOGD("GL error while copying layer into bitmap = 0x%x", error);
473 }
474 #endif
475
476 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
477 layer->setAlpha(alpha, mode);
478 layer->setFbo(previousLayerFbo);
479 glDeleteTextures(1, &texture);
480 caches.fboCache.put(fbo);
481 glViewport(previousViewport[0], previousViewport[1],
482 previousViewport[2], previousViewport[3]);
483
484 return status;
485 }
486 return false;
487 }
488
489 }; // namespace uirenderer
490 }; // namespace android
491