Layer.cpp revision 49bc4acfadf9c5b1e520217278ccb38010d38c89 
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, const uint32_t layerWidth, const 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    mesh = nullptr;
50    meshElementCount = 0;
51    cacheable = true;
52    dirty = false;
53    renderTarget = GL_TEXTURE_2D;
54    texture.width = layerWidth;
55    texture.height = layerHeight;
56    colorFilter = nullptr;
57    deferredUpdateScheduled = false;
58    renderNode = nullptr;
59    fbo = 0;
60    stencil = nullptr;
61    debugDrawUpdate = false;
62    hasDrawnSinceUpdate = false;
63    forceFilter = false;
64    convexMask = nullptr;
65    rendererLightPosDirty = true;
66    wasBuildLayered = false;
67    renderState.registerLayer(this);
68}
69
70Layer::~Layer() {
71    renderState.unregisterLayer(this);
72    SkSafeUnref(colorFilter);
73
74    if (stencil || fbo || texture.id) {
75        renderState.requireGLContext();
76        removeFbo();
77        deleteTexture();
78    }
79
80    delete[] mesh;
81}
82
83void Layer::onGlContextLost() {
84    removeFbo();
85    deleteTexture();
86}
87
88uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
89    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
90}
91
92uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
93    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
94}
95
96void Layer::requireRenderer() {
97    if (!renderer) {
98        renderer.reset(new LayerRenderer(renderState, this));
99        renderer->initProperties();
100    }
101}
102
103void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
104    if (renderer && rendererLightPosDirty) {
105        // re-init renderer's light position, based upon last cached location in window
106        Vector3 lightPos = rootRenderer.getLightCenter();
107        cachedInvTransformInWindow.mapPoint3d(lightPos);
108        renderer->initLight(lightPos, rootRenderer.getLightRadius(),
109                rootRenderer.getAmbientShadowAlpha(), rootRenderer.getSpotShadowAlpha());
110        rendererLightPosDirty = false;
111    }
112}
113
114bool Layer::resize(const uint32_t width, const uint32_t height) {
115    uint32_t desiredWidth = computeIdealWidth(width);
116    uint32_t desiredHeight = computeIdealWidth(height);
117
118    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
119        return true;
120    }
121
122    ATRACE_NAME("resizeLayer");
123
124    const uint32_t maxTextureSize = caches.maxTextureSize;
125    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
126        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
127                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
128        return false;
129    }
130
131    uint32_t oldWidth = getWidth();
132    uint32_t oldHeight = getHeight();
133
134    setSize(desiredWidth, desiredHeight);
135
136    if (fbo) {
137        caches.activeTexture(0);
138        bindTexture();
139        allocateTexture();
140
141        if (glGetError() != GL_NO_ERROR) {
142            setSize(oldWidth, oldHeight);
143            return false;
144        }
145    }
146
147    if (stencil) {
148        stencil->bind();
149        stencil->resize(desiredWidth, desiredHeight);
150
151        if (glGetError() != GL_NO_ERROR) {
152            setSize(oldWidth, oldHeight);
153            return false;
154        }
155    }
156
157    return true;
158}
159
160void Layer::removeFbo(bool flush) {
161    if (stencil) {
162        GLuint previousFbo = renderState.getFramebuffer();
163        renderState.bindFramebuffer(fbo);
164        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
165        renderState.bindFramebuffer(previousFbo);
166
167        caches.renderBufferCache.put(stencil);
168        stencil = nullptr;
169    }
170
171    if (fbo) {
172        if (flush) LayerRenderer::flushLayer(renderState, this);
173        // If put fails the cache will delete the FBO
174        caches.fboCache.put(fbo);
175        fbo = 0;
176    }
177}
178
179void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
180    requireRenderer();
181    this->renderNode = renderNode;
182    const Rect r(left, top, right, bottom);
183    dirtyRect.unionWith(r);
184    deferredUpdateScheduled = true;
185}
186
187void Layer::setPaint(const SkPaint* paint) {
188    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
189    setColorFilter((paint) ? paint->getColorFilter() : nullptr);
190}
191
192void Layer::setColorFilter(SkColorFilter* filter) {
193    SkRefCnt_SafeAssign(colorFilter, filter);
194}
195
196void Layer::bindTexture() const {
197    if (texture.id) {
198        caches.bindTexture(renderTarget, texture.id);
199    }
200}
201
202void Layer::bindStencilRenderBuffer() const {
203    if (stencil) {
204        stencil->bind();
205    }
206}
207
208void Layer::generateTexture() {
209    if (!texture.id) {
210        glGenTextures(1, &texture.id);
211    }
212}
213
214void Layer::deleteTexture() {
215    if (texture.id) {
216        texture.deleteTexture();
217        texture.id = 0;
218    }
219}
220
221void Layer::clearTexture() {
222    caches.unbindTexture(texture.id);
223    texture.id = 0;
224}
225
226void Layer::allocateTexture() {
227#if DEBUG_LAYERS
228    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
229#endif
230    if (texture.id) {
231        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
232        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
233                GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
234    }
235}
236
237void Layer::defer(const OpenGLRenderer& rootRenderer) {
238    ATRACE_LAYER_WORK("Optimize");
239
240    updateLightPosFromRenderer(rootRenderer);
241    const float width = layer.getWidth();
242    const float height = layer.getHeight();
243
244    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
245            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
246        dirtyRect.set(0, 0, width, height);
247    }
248
249    deferredList.reset(new DeferredDisplayList(dirtyRect));
250
251    DeferStateStruct deferredState(*deferredList, *renderer,
252            RenderNode::kReplayFlag_ClipChildren);
253
254    renderer->setViewport(width, height);
255    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
256            dirtyRect.right, dirtyRect.bottom, !isBlend());
257
258    renderNode->computeOrdering();
259    renderNode->defer(deferredState, 0);
260
261    deferredUpdateScheduled = false;
262}
263
264void Layer::cancelDefer() {
265    renderNode = nullptr;
266    deferredUpdateScheduled = false;
267    deferredList.release();
268}
269
270void Layer::flush() {
271    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
272    if (deferredList && renderer) {
273        ATRACE_LAYER_WORK("Issue");
274        renderer->startMark((renderNode.get() != nullptr) ? renderNode->getName() : "Layer");
275
276        renderer->setViewport(layer.getWidth(), layer.getHeight());
277        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
278                !isBlend());
279
280        deferredList->flush(*renderer, dirtyRect);
281
282        renderer->finish();
283
284        dirtyRect.setEmpty();
285        renderNode = nullptr;
286
287        renderer->endMark();
288    }
289}
290
291void Layer::render(const OpenGLRenderer& rootRenderer) {
292    ATRACE_LAYER_WORK("Direct-Issue");
293
294    updateLightPosFromRenderer(rootRenderer);
295    renderer->setViewport(layer.getWidth(), layer.getHeight());
296    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
297            !isBlend());
298
299    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
300
301    renderer->finish();
302
303    dirtyRect.setEmpty();
304
305    deferredUpdateScheduled = false;
306    renderNode = nullptr;
307}
308
309void Layer::postDecStrong() {
310    renderState.postDecStrong(this);
311}
312
313}; // namespace uirenderer
314}; // namespace android
315