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      1 /*
      2  * Copyright (C) 2017 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 #include "GlLayer.h"
     18 
     19 #include "Caches.h"
     20 #include "RenderNode.h"
     21 #include "renderstate/RenderState.h"
     22 #include "utils/TraceUtils.h"
     23 
     24 #include <utils/Log.h>
     25 
     26 #define ATRACE_LAYER_WORK(label)                                                       \
     27     ATRACE_FORMAT("%s HW Layer DisplayList %s %ux%u", label,                           \
     28                   (renderNode.get() != NULL) ? renderNode->getName() : "", getWidth(), \
     29                   getHeight())
     30 
     31 namespace android {
     32 namespace uirenderer {
     33 
     34 GlLayer::GlLayer(RenderState& renderState, uint32_t layerWidth, uint32_t layerHeight,
     35                  sk_sp<SkColorFilter> colorFilter, int alpha, SkBlendMode mode, bool blend)
     36         : Layer(renderState, Api::OpenGL, colorFilter, alpha, mode)
     37         , caches(Caches::getInstance())
     38         , texture(caches) {
     39     texture.mWidth = layerWidth;
     40     texture.mHeight = layerHeight;
     41     texture.blend = blend;
     42 }
     43 
     44 GlLayer::~GlLayer() {
     45     // There's a rare possibility that Caches could have been destroyed already
     46     // since this method is queued up as a task.
     47     // Since this is a reset method, treat this as non-fatal.
     48     if (caches.isInitialized() && texture.mId) {
     49         texture.deleteTexture();
     50     }
     51 }
     52 
     53 void GlLayer::onGlContextLost() {
     54     texture.deleteTexture();
     55 }
     56 
     57 void GlLayer::setRenderTarget(GLenum renderTarget) {
     58     if (renderTarget != getRenderTarget()) {
     59         // new render target: bind with new target, and update filter/wrap
     60         texture.mTarget = renderTarget;
     61         if (texture.mId) {
     62             caches.textureState().bindTexture(texture.target(), texture.mId);
     63         }
     64         texture.setFilter(GL_NEAREST, false, true);
     65         texture.setWrap(GL_CLAMP_TO_EDGE, false, true);
     66     }
     67 }
     68 
     69 void GlLayer::generateTexture() {
     70     if (!texture.mId) {
     71         glGenTextures(1, &texture.mId);
     72     }
     73 }
     74 
     75 };  // namespace uirenderer
     76 };  // namespace android
     77