Layer.cpp revision e5c6584a402fb3b1fe0507e4e00e601bec8f1bbc 
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 "Layer.h"
20
21#include "Caches.h"
22#include "DeferredDisplayList.h"
23#include "LayerRenderer.h"
24#include "OpenGLRenderer.h"
25#include "RenderNode.h"
26#include "renderstate/RenderState.h"
27#include "utils/TraceUtils.h"
28
29#include <utils/Log.h>
30
31#define ATRACE_LAYER_WORK(label) \
32    ATRACE_FORMAT("%s HW Layer DisplayList %s %ux%u", \
33            label, \
34            (renderNode.get() != NULL) ? renderNode->getName() : "", \
35            getWidth(), getHeight())
36
37namespace android {
38namespace uirenderer {
39
40Layer::Layer(Type layerType, RenderState& renderState, uint32_t layerWidth, uint32_t layerHeight)
41        : state(kState_Uncached)
42        , caches(Caches::getInstance())
43        , renderState(renderState)
44        , texture(caches)
45        , type(layerType) {
46    // TODO: This is a violation of Android's typical ref counting, but it
47    // preserves the old inc/dec ref locations. This should be changed...
48    incStrong(nullptr);
49    renderTarget = GL_TEXTURE_2D;
50    texture.width = layerWidth;
51    texture.height = layerHeight;
52    renderState.registerLayer(this);
53}
54
55Layer::~Layer() {
56    renderState.unregisterLayer(this);
57    SkSafeUnref(colorFilter);
58
59    if (stencil || fbo || texture.id) {
60        renderState.requireGLContext();
61        removeFbo();
62        deleteTexture();
63    }
64
65    delete[] mesh;
66}
67
68void Layer::onGlContextLost() {
69    removeFbo();
70    deleteTexture();
71}
72
73uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
74    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
75}
76
77uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
78    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
79}
80
81void Layer::requireRenderer() {
82    if (!renderer) {
83        renderer.reset(new LayerRenderer(renderState, this));
84        renderer->initProperties();
85    }
86}
87
88void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
89    if (renderer && rendererLightPosDirty) {
90        // re-init renderer's light position, based upon last cached location in window
91        Vector3 lightPos = rootRenderer.getLightCenter();
92        cachedInvTransformInWindow.mapPoint3d(lightPos);
93        renderer->initLight(lightPos, rootRenderer.getLightRadius(),
94                rootRenderer.getAmbientShadowAlpha(), rootRenderer.getSpotShadowAlpha());
95        rendererLightPosDirty = false;
96    }
97}
98
99bool Layer::resize(const uint32_t width, const uint32_t height) {
100    uint32_t desiredWidth = computeIdealWidth(width);
101    uint32_t desiredHeight = computeIdealWidth(height);
102
103    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
104        return true;
105    }
106
107    ATRACE_NAME("resizeLayer");
108
109    const uint32_t maxTextureSize = caches.maxTextureSize;
110    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
111        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
112                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
113        return false;
114    }
115
116    uint32_t oldWidth = getWidth();
117    uint32_t oldHeight = getHeight();
118
119    setSize(desiredWidth, desiredHeight);
120
121    if (fbo) {
122        caches.textureState().activateTexture(0);
123        bindTexture();
124        allocateTexture();
125
126        if (glGetError() != GL_NO_ERROR) {
127            setSize(oldWidth, oldHeight);
128            return false;
129        }
130    }
131
132    if (stencil) {
133        stencil->bind();
134        stencil->resize(desiredWidth, desiredHeight);
135
136        if (glGetError() != GL_NO_ERROR) {
137            setSize(oldWidth, oldHeight);
138            return false;
139        }
140    }
141
142    return true;
143}
144
145void Layer::removeFbo(bool flush) {
146    if (stencil) {
147        GLuint previousFbo = renderState.getFramebuffer();
148        renderState.bindFramebuffer(fbo);
149        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
150        renderState.bindFramebuffer(previousFbo);
151
152        caches.renderBufferCache.put(stencil);
153        stencil = nullptr;
154    }
155
156    if (fbo) {
157        if (flush) LayerRenderer::flushLayer(renderState, this);
158        // If put fails the cache will delete the FBO
159        caches.fboCache.put(fbo);
160        fbo = 0;
161    }
162}
163
164void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
165    requireRenderer();
166    this->renderNode = renderNode;
167    const Rect r(left, top, right, bottom);
168    dirtyRect.unionWith(r);
169    deferredUpdateScheduled = true;
170}
171
172void Layer::setPaint(const SkPaint* paint) {
173    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
174    setColorFilter((paint) ? paint->getColorFilter() : nullptr);
175}
176
177void Layer::setColorFilter(SkColorFilter* filter) {
178    SkRefCnt_SafeAssign(colorFilter, filter);
179}
180
181void Layer::bindTexture() const {
182    if (texture.id) {
183        caches.textureState().bindTexture(renderTarget, texture.id);
184    }
185}
186
187void Layer::bindStencilRenderBuffer() const {
188    if (stencil) {
189        stencil->bind();
190    }
191}
192
193void Layer::generateTexture() {
194    if (!texture.id) {
195        glGenTextures(1, &texture.id);
196    }
197}
198
199void Layer::deleteTexture() {
200    if (texture.id) {
201        texture.deleteTexture();
202        texture.id = 0;
203    }
204}
205
206void Layer::clearTexture() {
207    caches.textureState().unbindTexture(texture.id);
208    texture.id = 0;
209}
210
211void Layer::allocateTexture() {
212#if DEBUG_LAYERS
213    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
214#endif
215    if (texture.id) {
216        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
217        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
218                GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
219    }
220}
221
222void Layer::defer(const OpenGLRenderer& rootRenderer) {
223    ATRACE_LAYER_WORK("Optimize");
224
225    updateLightPosFromRenderer(rootRenderer);
226    const float width = layer.getWidth();
227    const float height = layer.getHeight();
228
229    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
230            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
231        dirtyRect.set(0, 0, width, height);
232    }
233
234    deferredList.reset(new DeferredDisplayList(dirtyRect));
235
236    DeferStateStruct deferredState(*deferredList, *renderer,
237            RenderNode::kReplayFlag_ClipChildren);
238
239    renderer->setViewport(width, height);
240    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
241            dirtyRect.right, dirtyRect.bottom, !isBlend());
242
243    renderNode->computeOrdering();
244    renderNode->defer(deferredState, 0);
245
246    deferredUpdateScheduled = false;
247}
248
249void Layer::cancelDefer() {
250    renderNode = nullptr;
251    deferredUpdateScheduled = false;
252    deferredList.release();
253}
254
255void Layer::flush() {
256    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
257    if (deferredList && renderer) {
258        ATRACE_LAYER_WORK("Issue");
259        renderer->startMark((renderNode.get() != nullptr) ? renderNode->getName() : "Layer");
260
261        renderer->setViewport(layer.getWidth(), layer.getHeight());
262        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
263                !isBlend());
264
265        deferredList->flush(*renderer, dirtyRect);
266
267        renderer->finish();
268
269        dirtyRect.setEmpty();
270        renderNode = nullptr;
271
272        renderer->endMark();
273    }
274}
275
276void Layer::render(const OpenGLRenderer& rootRenderer) {
277    ATRACE_LAYER_WORK("Direct-Issue");
278
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 = nullptr;
292}
293
294void Layer::postDecStrong() {
295    renderState.postDecStrong(this);
296}
297
298}; // namespace uirenderer
299}; // namespace android
300