Layer.cpp revision 8a226d24b8b2fde4c855d0051cb7bfc5b5813c36 
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(Type layerType, RenderState& renderState, const uint32_t layerWidth, const uint32_t layerHeight)
33        : caches(Caches::getInstance())
34        , renderState(renderState)
35        , texture(caches)
36        , type(layerType) {
37    mesh = NULL;
38    meshElementCount = 0;
39    cacheable = true;
40    dirty = 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    rendererLightPosDirty = true;
57    wasBuildLayered = false;
58    if (!isTextureLayer()) {
59        // track only non-texture layer lifecycles in renderstate,
60        // because texture layers are destroyed via finalizer
61        renderState.registerLayer(this);
62    }
63}
64
65Layer::~Layer() {
66    if (!isTextureLayer()) {
67        renderState.unregisterLayer(this);
68    }
69    SkSafeUnref(colorFilter);
70    removeFbo();
71    deleteTexture();
72
73    delete[] mesh;
74    delete deferredList;
75    delete renderer;
76}
77
78uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
79    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
80}
81
82uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
83    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
84}
85
86void Layer::requireRenderer() {
87    if (!renderer) {
88        renderer = new LayerRenderer(renderState, this);
89        renderer->initProperties();
90    }
91}
92
93void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
94    if (renderer && rendererLightPosDirty) {
95        // re-init renderer's light position, based upon last cached location in window
96        Vector3 lightPos = rootRenderer.getLightCenter();
97        cachedInvTransformInWindow.mapPoint3d(lightPos);
98        renderer->initLight(lightPos, rootRenderer.getLightRadius(),
99                rootRenderer.getAmbientShadowAlpha(), rootRenderer.getSpotShadowAlpha());
100        rendererLightPosDirty = false;
101    }
102}
103
104bool Layer::resize(const uint32_t width, const uint32_t height) {
105    uint32_t desiredWidth = computeIdealWidth(width);
106    uint32_t desiredHeight = computeIdealWidth(height);
107
108    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
109        return true;
110    }
111
112    ATRACE_NAME("resizeLayer");
113
114    const uint32_t maxTextureSize = caches.maxTextureSize;
115    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
116        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
117                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
118        return false;
119    }
120
121    uint32_t oldWidth = getWidth();
122    uint32_t oldHeight = getHeight();
123
124    setSize(desiredWidth, desiredHeight);
125
126    if (fbo) {
127        caches.activeTexture(0);
128        bindTexture();
129        allocateTexture();
130
131        if (glGetError() != GL_NO_ERROR) {
132            setSize(oldWidth, oldHeight);
133            return false;
134        }
135    }
136
137    if (stencil) {
138        stencil->bind();
139        stencil->resize(desiredWidth, desiredHeight);
140
141        if (glGetError() != GL_NO_ERROR) {
142            setSize(oldWidth, oldHeight);
143            return false;
144        }
145    }
146
147    return true;
148}
149
150void Layer::removeFbo(bool flush) {
151    if (stencil) {
152        GLuint previousFbo = renderState.getFramebuffer();
153        renderState.bindFramebuffer(fbo);
154        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
155        renderState.bindFramebuffer(previousFbo);
156
157        caches.renderBufferCache.put(stencil);
158        stencil = NULL;
159    }
160
161    if (fbo) {
162        if (flush) LayerRenderer::flushLayer(renderState, this);
163        // If put fails the cache will delete the FBO
164        caches.fboCache.put(fbo);
165        fbo = 0;
166    }
167}
168
169void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
170    requireRenderer();
171    this->renderNode = renderNode;
172    const Rect r(left, top, right, bottom);
173    dirtyRect.unionWith(r);
174    deferredUpdateScheduled = true;
175}
176
177void Layer::setPaint(const SkPaint* paint) {
178    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
179    setColorFilter((paint) ? paint->getColorFilter() : NULL);
180}
181
182void Layer::setColorFilter(SkColorFilter* filter) {
183    SkRefCnt_SafeAssign(colorFilter, filter);
184}
185
186void Layer::bindTexture() const {
187    if (texture.id) {
188        caches.bindTexture(renderTarget, texture.id);
189    }
190}
191
192void Layer::bindStencilRenderBuffer() const {
193    if (stencil) {
194        stencil->bind();
195    }
196}
197
198void Layer::generateTexture() {
199    if (!texture.id) {
200        glGenTextures(1, &texture.id);
201    }
202}
203
204void Layer::deleteTexture() {
205    if (texture.id) {
206        texture.deleteTexture();
207        texture.id = 0;
208    }
209}
210
211void Layer::clearTexture() {
212    caches.unbindTexture(texture.id);
213    texture.id = 0;
214}
215
216void Layer::allocateTexture() {
217#if DEBUG_LAYERS
218    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
219#endif
220    if (texture.id) {
221        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
222        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
223                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
224    }
225}
226
227void Layer::defer(const OpenGLRenderer& rootRenderer) {
228    updateLightPosFromRenderer(rootRenderer);
229    const float width = layer.getWidth();
230    const float height = layer.getHeight();
231
232    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
233            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
234        dirtyRect.set(0, 0, width, height);
235    }
236
237    delete deferredList;
238    deferredList = new DeferredDisplayList(dirtyRect);
239
240    DeferStateStruct deferredState(*deferredList, *renderer,
241            RenderNode::kReplayFlag_ClipChildren);
242
243    renderer->setViewport(width, height);
244    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
245            dirtyRect.right, dirtyRect.bottom, !isBlend());
246
247    renderNode->computeOrdering();
248    renderNode->defer(deferredState, 0);
249
250    deferredUpdateScheduled = false;
251}
252
253void Layer::cancelDefer() {
254    renderNode = NULL;
255    deferredUpdateScheduled = false;
256    if (deferredList) {
257        delete deferredList;
258        deferredList = NULL;
259    }
260}
261
262void Layer::flush() {
263    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
264    if (deferredList && renderer) {
265        renderer->setViewport(layer.getWidth(), layer.getHeight());
266        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
267                !isBlend());
268
269        deferredList->flush(*renderer, dirtyRect);
270
271        renderer->finish();
272
273        dirtyRect.setEmpty();
274        renderNode = NULL;
275    }
276}
277
278void Layer::render(const OpenGLRenderer& rootRenderer) {
279    updateLightPosFromRenderer(rootRenderer);
280    renderer->setViewport(layer.getWidth(), layer.getHeight());
281    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
282            !isBlend());
283
284    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
285
286    renderer->finish();
287
288    dirtyRect.setEmpty();
289
290    deferredUpdateScheduled = false;
291    renderNode = NULL;
292}
293
294}; // namespace uirenderer
295}; // namespace android
296