Layer.cpp revision 3b20251a355c88193c439f928a84ae69483fb488 
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 "RenderState.h"
24#include "Layer.h"
25#include "LayerRenderer.h"
26#include "OpenGLRenderer.h"
27#include "RenderNode.h"
28
29namespace android {
30namespace uirenderer {
31
32Layer::Layer(RenderState& renderState, const uint32_t layerWidth, const uint32_t layerHeight)
33        : caches(Caches::getInstance())
34        , renderState(renderState)
35        , texture(caches) {
36    mesh = NULL;
37    meshElementCount = 0;
38    cacheable = true;
39    dirty = false;
40    textureLayer = false;
41    renderTarget = GL_TEXTURE_2D;
42    texture.width = layerWidth;
43    texture.height = layerHeight;
44    colorFilter = NULL;
45    deferredUpdateScheduled = false;
46    renderer = NULL;
47    renderNode = NULL;
48    fbo = 0;
49    stencil = NULL;
50    debugDrawUpdate = false;
51    hasDrawnSinceUpdate = false;
52    forceFilter = false;
53    deferredList = NULL;
54    convexMask = NULL;
55    caches.resourceCache.incrementRefcount(this);
56}
57
58Layer::~Layer() {
59    SkSafeUnref(colorFilter);
60    removeFbo();
61    deleteTexture();
62
63    delete[] mesh;
64    delete deferredList;
65    delete renderer;
66}
67
68uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
69    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
70}
71
72uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
73    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
74}
75
76void Layer::requireRenderer() {
77    if (!renderer) {
78        renderer = new LayerRenderer(renderState, this);
79        renderer->initProperties();
80    }
81}
82
83bool Layer::resize(const uint32_t width, const uint32_t height) {
84    uint32_t desiredWidth = computeIdealWidth(width);
85    uint32_t desiredHeight = computeIdealWidth(height);
86
87    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
88        return true;
89    }
90
91    const uint32_t maxTextureSize = caches.maxTextureSize;
92    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
93        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
94                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
95        return false;
96    }
97
98    uint32_t oldWidth = getWidth();
99    uint32_t oldHeight = getHeight();
100
101    setSize(desiredWidth, desiredHeight);
102
103    if (fbo) {
104        caches.activeTexture(0);
105        bindTexture();
106        allocateTexture();
107
108        if (glGetError() != GL_NO_ERROR) {
109            setSize(oldWidth, oldHeight);
110            return false;
111        }
112    }
113
114    if (stencil) {
115        stencil->bind();
116        stencil->resize(desiredWidth, desiredHeight);
117
118        if (glGetError() != GL_NO_ERROR) {
119            setSize(oldWidth, oldHeight);
120            return false;
121        }
122    }
123
124    return true;
125}
126
127void Layer::removeFbo(bool flush) {
128    if (stencil) {
129        GLuint previousFbo = renderState.getFramebuffer();
130        renderState.bindFramebuffer(fbo);
131        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
132        renderState.bindFramebuffer(previousFbo);
133
134        caches.renderBufferCache.put(stencil);
135        stencil = NULL;
136    }
137
138    if (fbo) {
139        if (flush) LayerRenderer::flushLayer(renderState, this);
140        // If put fails the cache will delete the FBO
141        caches.fboCache.put(fbo);
142        fbo = 0;
143    }
144}
145
146void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
147    requireRenderer();
148    this->renderNode = renderNode;
149    const Rect r(left, top, right, bottom);
150    dirtyRect.unionWith(r);
151    deferredUpdateScheduled = true;
152}
153
154void Layer::setPaint(const SkPaint* paint) {
155    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
156    setColorFilter((paint) ? paint->getColorFilter() : NULL);
157}
158
159void Layer::setColorFilter(SkColorFilter* filter) {
160    SkRefCnt_SafeAssign(colorFilter, filter);
161}
162
163void Layer::bindTexture() const {
164    if (texture.id) {
165        caches.bindTexture(renderTarget, texture.id);
166    }
167}
168
169void Layer::bindStencilRenderBuffer() const {
170    if (stencil) {
171        stencil->bind();
172    }
173}
174
175void Layer::generateTexture() {
176    if (!texture.id) {
177        glGenTextures(1, &texture.id);
178    }
179}
180
181void Layer::deleteTexture() {
182    if (texture.id) {
183        texture.deleteTexture();
184        texture.id = 0;
185    }
186}
187
188void Layer::clearTexture() {
189    caches.unbindTexture(texture.id);
190    texture.id = 0;
191}
192
193void Layer::allocateTexture() {
194#if DEBUG_LAYERS
195    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
196#endif
197    if (texture.id) {
198        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
199        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
200                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
201    }
202}
203
204void Layer::defer() {
205    const float width = layer.getWidth();
206    const float height = layer.getHeight();
207
208    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
209            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
210        dirtyRect.set(0, 0, width, height);
211    }
212
213    delete deferredList;
214    deferredList = new DeferredDisplayList(dirtyRect);
215
216    DeferStateStruct deferredState(*deferredList, *renderer,
217            RenderNode::kReplayFlag_ClipChildren);
218
219    renderer->setViewport(width, height);
220    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
221            dirtyRect.right, dirtyRect.bottom, !isBlend());
222
223    renderNode->computeOrdering();
224    renderNode->defer(deferredState, 0);
225
226    deferredUpdateScheduled = false;
227}
228
229void Layer::cancelDefer() {
230    renderNode = NULL;
231    deferredUpdateScheduled = false;
232    if (deferredList) {
233        delete deferredList;
234        deferredList = NULL;
235    }
236}
237
238void Layer::flush() {
239    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
240    if (deferredList && renderer) {
241        renderer->setViewport(layer.getWidth(), layer.getHeight());
242        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
243                !isBlend());
244
245        deferredList->flush(*renderer, dirtyRect);
246
247        renderer->finish();
248
249        dirtyRect.setEmpty();
250        renderNode = NULL;
251    }
252}
253
254void Layer::render() {
255    renderer->setViewport(layer.getWidth(), layer.getHeight());
256    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
257            !isBlend());
258
259    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
260
261    renderer->finish();
262
263    dirtyRect.setEmpty();
264
265    deferredUpdateScheduled = false;
266    renderNode = NULL;
267}
268
269}; // namespace uirenderer
270}; // namespace android
271