Layer.cpp revision a7090e0cfd7c719a6d4c03aae34f5db98754cbdd 
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#define LOG_TAG "OpenGLRenderer"
18
19#include <utils/Log.h>
20
21#include "Caches.h"
22#include "DeferredDisplayList.h"
23#include "Layer.h"
24#include "LayerRenderer.h"
25#include "OpenGLRenderer.h"
26#include "RenderNode.h"
27
28namespace android {
29namespace uirenderer {
30
31Layer::Layer(const uint32_t layerWidth, const uint32_t layerHeight):
32        caches(Caches::getInstance()), texture(caches) {
33    mesh = NULL;
34    meshElementCount = 0;
35    cacheable = true;
36    dirty = false;
37    textureLayer = false;
38    renderTarget = GL_TEXTURE_2D;
39    texture.width = layerWidth;
40    texture.height = layerHeight;
41    colorFilter = NULL;
42    deferredUpdateScheduled = false;
43    renderer = NULL;
44    renderNode = NULL;
45    fbo = 0;
46    stencil = NULL;
47    debugDrawUpdate = false;
48    hasDrawnSinceUpdate = false;
49    forceFilter = false;
50    deferredList = NULL;
51    convexMask = NULL;
52    caches.resourceCache.incrementRefcount(this);
53}
54
55Layer::~Layer() {
56    SkSafeUnref(colorFilter);
57    removeFbo();
58    deleteTexture();
59
60    delete[] mesh;
61    delete deferredList;
62    delete renderer;
63}
64
65uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
66    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
67}
68
69uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
70    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
71}
72
73void Layer::requireRenderer() {
74    if (!renderer) {
75        renderer = new LayerRenderer(this);
76        renderer->initProperties();
77    }
78}
79
80bool Layer::resize(const uint32_t width, const uint32_t height) {
81    uint32_t desiredWidth = computeIdealWidth(width);
82    uint32_t desiredHeight = computeIdealWidth(height);
83
84    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
85        return true;
86    }
87
88    const uint32_t maxTextureSize = caches.maxTextureSize;
89    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
90        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
91                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
92        return false;
93    }
94
95    uint32_t oldWidth = getWidth();
96    uint32_t oldHeight = getHeight();
97
98    setSize(desiredWidth, desiredHeight);
99
100    if (fbo) {
101        caches.activeTexture(0);
102        bindTexture();
103        allocateTexture();
104
105        if (glGetError() != GL_NO_ERROR) {
106            setSize(oldWidth, oldHeight);
107            return false;
108        }
109    }
110
111    if (stencil) {
112        stencil->bind();
113        stencil->resize(desiredWidth, desiredHeight);
114
115        if (glGetError() != GL_NO_ERROR) {
116            setSize(oldWidth, oldHeight);
117            return false;
118        }
119    }
120
121    return true;
122}
123
124void Layer::removeFbo(bool flush) {
125    if (stencil) {
126        GLuint previousFbo;
127        glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo);
128        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo);
129        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
130        if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo);
131
132        caches.renderBufferCache.put(stencil);
133        stencil = NULL;
134    }
135
136    if (fbo) {
137        if (flush) LayerRenderer::flushLayer(this);
138        // If put fails the cache will delete the FBO
139        caches.fboCache.put(fbo);
140        fbo = 0;
141    }
142}
143
144void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
145    requireRenderer();
146    this->renderNode = renderNode;
147    const Rect r(left, top, right, bottom);
148    dirtyRect.unionWith(r);
149    deferredUpdateScheduled = true;
150}
151
152void Layer::setPaint(const SkPaint* paint) {
153    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
154    setColorFilter((paint) ? paint->getColorFilter() : NULL);
155}
156
157void Layer::setColorFilter(SkColorFilter* filter) {
158    SkRefCnt_SafeAssign(colorFilter, filter);
159}
160
161void Layer::bindTexture() const {
162    if (texture.id) {
163        caches.bindTexture(renderTarget, texture.id);
164    }
165}
166
167void Layer::bindStencilRenderBuffer() const {
168    if (stencil) {
169        stencil->bind();
170    }
171}
172
173void Layer::generateTexture() {
174    if (!texture.id) {
175        glGenTextures(1, &texture.id);
176    }
177}
178
179void Layer::deleteTexture() {
180    if (texture.id) {
181        texture.deleteTexture();
182        texture.id = 0;
183    }
184}
185
186void Layer::clearTexture() {
187    caches.unbindTexture(texture.id);
188    texture.id = 0;
189}
190
191void Layer::allocateTexture() {
192#if DEBUG_LAYERS
193    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
194#endif
195    if (texture.id) {
196        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
197        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
198                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
199    }
200}
201
202void Layer::defer() {
203    const float width = layer.getWidth();
204    const float height = layer.getHeight();
205
206    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
207            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
208        dirtyRect.set(0, 0, width, height);
209    }
210
211    delete deferredList;
212    deferredList = new DeferredDisplayList(dirtyRect);
213
214    DeferStateStruct deferredState(*deferredList, *renderer,
215            RenderNode::kReplayFlag_ClipChildren);
216
217    renderer->setViewport(width, height);
218    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
219            dirtyRect.right, dirtyRect.bottom, !isBlend());
220
221    renderNode->computeOrdering();
222    renderNode->defer(deferredState, 0);
223
224    deferredUpdateScheduled = false;
225}
226
227void Layer::cancelDefer() {
228    renderNode = NULL;
229    deferredUpdateScheduled = false;
230    if (deferredList) {
231        delete deferredList;
232        deferredList = NULL;
233    }
234}
235
236void Layer::flush() {
237    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
238    if (deferredList && renderer) {
239        renderer->setViewport(layer.getWidth(), layer.getHeight());
240        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
241                !isBlend());
242
243        deferredList->flush(*renderer, dirtyRect);
244
245        renderer->finish();
246
247        dirtyRect.setEmpty();
248        renderNode = NULL;
249    }
250}
251
252void Layer::render() {
253    renderer->setViewport(layer.getWidth(), layer.getHeight());
254    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
255            !isBlend());
256
257    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
258
259    renderer->finish();
260
261    dirtyRect.setEmpty();
262
263    deferredUpdateScheduled = false;
264    renderNode = NULL;
265}
266
267}; // namespace uirenderer
268}; // namespace android
269