GlLayer.cpp revision 3e9999bd866fac71c72e6b484a9836c87c328a08 
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", \
28            label, \
29            (renderNode.get() != NULL) ? renderNode->getName() : "", \
30            getWidth(), getHeight())
31
32namespace android {
33namespace uirenderer {
34
35GlLayer::GlLayer(RenderState& renderState, uint32_t layerWidth, uint32_t layerHeight,
36        SkColorFilter* colorFilter, int alpha, SkBlendMode mode, bool blend)
37        : Layer(renderState, Api::OpenGL, colorFilter, alpha, mode)
38        , caches(Caches::getInstance())
39        , texture(caches) {
40    texture.mWidth = layerWidth;
41    texture.mHeight = layerHeight;
42    texture.blend = blend;
43}
44
45GlLayer::~GlLayer() {
46    if (texture.mId) {
47        texture.deleteTexture();
48    }
49}
50
51void GlLayer::onGlContextLost() {
52    texture.deleteTexture();
53}
54
55void GlLayer::bindTexture() const {
56    if (texture.mId) {
57        caches.textureState().bindTexture(texture.target(), texture.mId);
58    }
59}
60
61void GlLayer::generateTexture() {
62    if (!texture.mId) {
63        glGenTextures(1, &texture.mId);
64    }
65}
66
67void GlLayer::clearTexture() {
68    // There's a rare possibility that Caches could have been destroyed already
69    // since this method is queued up as a task.
70    // Since this is a reset method, treat this as non-fatal.
71    if (caches.isInitialized()) {
72        caches.textureState().unbindTexture(texture.mId);
73    }
74    texture.mId = 0;
75}
76
77}; // namespace uirenderer
78}; // namespace android
79