Layer.cpp revision 0e89e2b7bcb2c035e8cee77f93120e7c5617f8d2 
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        : state(kState_Uncached)
34        , caches(Caches::getInstance())
35        , renderState(renderState)
36        , texture(caches)
37        , type(layerType) {
38    // TODO: This is a violation of Android's typical ref counting, but it
39    // preserves the old inc/dec ref locations. This should be changed...
40    incStrong(0);
41    mesh = NULL;
42    meshElementCount = 0;
43    cacheable = true;
44    dirty = false;
45    renderTarget = GL_TEXTURE_2D;
46    texture.width = layerWidth;
47    texture.height = layerHeight;
48    colorFilter = NULL;
49    deferredUpdateScheduled = false;
50    renderer = NULL;
51    renderNode = NULL;
52    fbo = 0;
53    stencil = NULL;
54    debugDrawUpdate = false;
55    hasDrawnSinceUpdate = false;
56    forceFilter = false;
57    deferredList = NULL;
58    convexMask = NULL;
59    rendererLightPosDirty = true;
60    wasBuildLayered = false;
61    renderState.registerLayer(this);
62}
63
64Layer::~Layer() {
65    renderState.requireGLContext();
66    renderState.unregisterLayer(this);
67    SkSafeUnref(colorFilter);
68    removeFbo();
69    deleteTexture();
70
71    delete[] mesh;
72    delete deferredList;
73    delete renderer;
74}
75
76uint32_t Layer::computeIdealWidth(uint32_t layerWidth) {
77    return uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
78}
79
80uint32_t Layer::computeIdealHeight(uint32_t layerHeight) {
81    return uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
82}
83
84void Layer::requireRenderer() {
85    if (!renderer) {
86        renderer = new LayerRenderer(renderState, this);
87        renderer->initProperties();
88    }
89}
90
91void Layer::updateLightPosFromRenderer(const OpenGLRenderer& rootRenderer) {
92    if (renderer && rendererLightPosDirty) {
93        // re-init renderer's light position, based upon last cached location in window
94        Vector3 lightPos = rootRenderer.getLightCenter();
95        cachedInvTransformInWindow.mapPoint3d(lightPos);
96        renderer->initLight(lightPos, rootRenderer.getLightRadius(),
97                rootRenderer.getAmbientShadowAlpha(), rootRenderer.getSpotShadowAlpha());
98        rendererLightPosDirty = false;
99    }
100}
101
102bool Layer::resize(const uint32_t width, const uint32_t height) {
103    uint32_t desiredWidth = computeIdealWidth(width);
104    uint32_t desiredHeight = computeIdealWidth(height);
105
106    if (desiredWidth <= getWidth() && desiredHeight <= getHeight()) {
107        return true;
108    }
109
110    ATRACE_NAME("resizeLayer");
111
112    const uint32_t maxTextureSize = caches.maxTextureSize;
113    if (desiredWidth > maxTextureSize || desiredHeight > maxTextureSize) {
114        ALOGW("Layer exceeds max. dimensions supported by the GPU (%dx%d, max=%dx%d)",
115                desiredWidth, desiredHeight, maxTextureSize, maxTextureSize);
116        return false;
117    }
118
119    uint32_t oldWidth = getWidth();
120    uint32_t oldHeight = getHeight();
121
122    setSize(desiredWidth, desiredHeight);
123
124    if (fbo) {
125        caches.activeTexture(0);
126        bindTexture();
127        allocateTexture();
128
129        if (glGetError() != GL_NO_ERROR) {
130            setSize(oldWidth, oldHeight);
131            return false;
132        }
133    }
134
135    if (stencil) {
136        stencil->bind();
137        stencil->resize(desiredWidth, desiredHeight);
138
139        if (glGetError() != GL_NO_ERROR) {
140            setSize(oldWidth, oldHeight);
141            return false;
142        }
143    }
144
145    return true;
146}
147
148void Layer::removeFbo(bool flush) {
149    if (stencil) {
150        GLuint previousFbo = renderState.getFramebuffer();
151        renderState.bindFramebuffer(fbo);
152        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
153        renderState.bindFramebuffer(previousFbo);
154
155        caches.renderBufferCache.put(stencil);
156        stencil = NULL;
157    }
158
159    if (fbo) {
160        if (flush) LayerRenderer::flushLayer(renderState, this);
161        // If put fails the cache will delete the FBO
162        caches.fboCache.put(fbo);
163        fbo = 0;
164    }
165}
166
167void Layer::updateDeferred(RenderNode* renderNode, int left, int top, int right, int bottom) {
168    requireRenderer();
169    this->renderNode = renderNode;
170    const Rect r(left, top, right, bottom);
171    dirtyRect.unionWith(r);
172    deferredUpdateScheduled = true;
173}
174
175void Layer::setPaint(const SkPaint* paint) {
176    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
177    setColorFilter((paint) ? paint->getColorFilter() : NULL);
178}
179
180void Layer::setColorFilter(SkColorFilter* filter) {
181    SkRefCnt_SafeAssign(colorFilter, filter);
182}
183
184void Layer::bindTexture() const {
185    if (texture.id) {
186        caches.bindTexture(renderTarget, texture.id);
187    }
188}
189
190void Layer::bindStencilRenderBuffer() const {
191    if (stencil) {
192        stencil->bind();
193    }
194}
195
196void Layer::generateTexture() {
197    if (!texture.id) {
198        glGenTextures(1, &texture.id);
199    }
200}
201
202void Layer::deleteTexture() {
203    if (texture.id) {
204        texture.deleteTexture();
205        texture.id = 0;
206    }
207}
208
209void Layer::clearTexture() {
210    caches.unbindTexture(texture.id);
211    texture.id = 0;
212}
213
214void Layer::allocateTexture() {
215#if DEBUG_LAYERS
216    ALOGD("  Allocate layer: %dx%d", getWidth(), getHeight());
217#endif
218    if (texture.id) {
219        glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
220        glTexImage2D(renderTarget, 0, GL_RGBA, getWidth(), getHeight(), 0,
221                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
222    }
223}
224
225void Layer::defer(const OpenGLRenderer& rootRenderer) {
226    updateLightPosFromRenderer(rootRenderer);
227    const float width = layer.getWidth();
228    const float height = layer.getHeight();
229
230    if (dirtyRect.isEmpty() || (dirtyRect.left <= 0 && dirtyRect.top <= 0 &&
231            dirtyRect.right >= width && dirtyRect.bottom >= height)) {
232        dirtyRect.set(0, 0, width, height);
233    }
234
235    delete deferredList;
236    deferredList = new DeferredDisplayList(dirtyRect);
237
238    DeferStateStruct deferredState(*deferredList, *renderer,
239            RenderNode::kReplayFlag_ClipChildren);
240
241    renderer->setViewport(width, height);
242    renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
243            dirtyRect.right, dirtyRect.bottom, !isBlend());
244
245    renderNode->computeOrdering();
246    renderNode->defer(deferredState, 0);
247
248    deferredUpdateScheduled = false;
249}
250
251void Layer::cancelDefer() {
252    renderNode = NULL;
253    deferredUpdateScheduled = false;
254    if (deferredList) {
255        delete deferredList;
256        deferredList = NULL;
257    }
258}
259
260void Layer::flush() {
261    // renderer is checked as layer may be destroyed/put in layer cache with flush scheduled
262    if (deferredList && renderer) {
263        renderer->setViewport(layer.getWidth(), layer.getHeight());
264        renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
265                !isBlend());
266
267        deferredList->flush(*renderer, dirtyRect);
268
269        renderer->finish();
270
271        dirtyRect.setEmpty();
272        renderNode = NULL;
273    }
274}
275
276void Layer::render(const OpenGLRenderer& rootRenderer) {
277    updateLightPosFromRenderer(rootRenderer);
278    renderer->setViewport(layer.getWidth(), layer.getHeight());
279    renderer->prepareDirty(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom,
280            !isBlend());
281
282    renderer->drawRenderNode(renderNode.get(), dirtyRect, RenderNode::kReplayFlag_ClipChildren);
283
284    renderer->finish();
285
286    dirtyRect.setEmpty();
287
288    deferredUpdateScheduled = false;
289    renderNode = NULL;
290}
291
292void Layer::postDecStrong() {
293    renderState.postDecStrong(this);
294}
295
296}; // namespace uirenderer
297}; // namespace android
298