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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_UI_LAYER_H
#define ANDROID_UI_LAYER_H
#include <sys/types.h>
#include <GLES2/gl2.h>
#include <SkXfermode.h>
#include "Rect.h"
namespace android {
namespace uirenderer {
/**
* Dimensions of a layer.
*/
struct LayerSize {
LayerSize(): width(0), height(0), id(0) { }
LayerSize(const uint32_t width, const uint32_t height): width(width), height(height), id(0) { }
LayerSize(const LayerSize& size): width(size.width), height(size.height), id(size.id) { }
uint32_t width;
uint32_t height;
// Incremental id used by the layer cache to store multiple
// LayerSize with the same dimensions
uint32_t id;
bool operator<(const LayerSize& rhs) const {
if (id != 0 && rhs.id != 0) {
return id < rhs.id;
}
if (width == rhs.width) {
return height < rhs.height;
}
return width < rhs.width;
}
bool operator==(const LayerSize& rhs) const {
return width == rhs.width && height == rhs.height;
}
}; // struct LayerSize
/**
* A layer has dimensions and is backed by an OpenGL texture.
*/
struct Layer {
/**
* Coordinates of the layer corresponding to this snapshot.
* Only set when the flag kFlagIsLayer is set.
*/
Rect layer;
/**
* Name of the texture used to render the layer.
* Only set when the flag kFlagIsLayer is set.
*/
GLuint texture;
/**
* Name of the FBO used to render the layer.
* Only set when the flag kFlagIsLayer is set.
*/
GLuint fbo;
/**
* Opacity of the layer.
* Only set when the flag kFlagIsLayer is set.
*/
float alpha;
/**
* Blending mode of the layer.
* Only set when the flag kFlagIsLayer is set.
*/
SkXfermode::Mode mode;
/**
* Indicates whether this layer should be blended.
*/
bool blend;
}; // struct Layer
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_UI_LAYER_H
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