| /* |
| * 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_HWUI_LAYER_H |
| #define ANDROID_HWUI_LAYER_H |
| |
| #include <sys/types.h> |
| |
| #include <GLES2/gl2.h> |
| |
| #include <ui/Region.h> |
| |
| #include <SkXfermode.h> |
| |
| #include "Rect.h" |
| #include "SkiaColorFilter.h" |
| #include "Vertex.h" |
| |
| namespace android { |
| namespace uirenderer { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Layers |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * A layer has dimensions and is backed by an OpenGL texture or FBO. |
| */ |
| struct Layer { |
| Layer(const uint32_t layerWidth, const uint32_t layerHeight): |
| width(layerWidth), height(layerHeight) { |
| mesh = NULL; |
| meshIndices = NULL; |
| meshElementCount = 0; |
| isCacheable = true; |
| isTextureLayer = false; |
| } |
| |
| ~Layer() { |
| if (mesh) delete mesh; |
| if (meshIndices) delete meshIndices; |
| } |
| |
| /** |
| * Sets this layer's region to a rectangle. Computes the appropriate |
| * texture coordinates. |
| */ |
| void setRegionAsRect() { |
| const android::Rect& bounds = region.getBounds(); |
| regionRect.set(bounds.leftTop().x, bounds.leftTop().y, |
| bounds.rightBottom().x, bounds.rightBottom().y); |
| |
| const float texX = 1.0f / float(width); |
| const float texY = 1.0f / float(height); |
| const float height = layer.getHeight(); |
| texCoords.set( |
| regionRect.left * texX, (height - regionRect.top) * texY, |
| regionRect.right * texX, (height - regionRect.bottom) * texY); |
| } |
| |
| /** |
| * Bounds of the layer. |
| */ |
| Rect layer; |
| /** |
| * Texture coordinates of the layer. |
| */ |
| Rect texCoords; |
| |
| /** |
| * Name of the FBO used to render the layer. If the name is 0 |
| * this layer is not backed by an FBO, but a simple texture. |
| */ |
| GLuint fbo; |
| |
| /** |
| * Opacity of the layer. |
| */ |
| int alpha; |
| /** |
| * Blending mode of the layer. |
| */ |
| SkXfermode::Mode mode; |
| /** |
| * Indicates whether this layer should be blended. |
| */ |
| bool blend; |
| |
| /** |
| * Indicates whether this layer has been used already. |
| */ |
| bool empty; |
| |
| /** |
| * Name of the texture used to render the layer. |
| */ |
| GLuint texture; |
| /** |
| * Width of the layer texture. |
| */ |
| uint32_t width; |
| /** |
| * Height of the layer texture. |
| */ |
| uint32_t height; |
| |
| /** |
| * Dirty region indicating what parts of the layer |
| * have been drawn. |
| */ |
| Region region; |
| /** |
| * If the region is a rectangle, coordinates of the |
| * region are stored here. |
| */ |
| Rect regionRect; |
| |
| /** |
| * Color filter used to draw this layer. Optional. |
| */ |
| SkiaColorFilter* colorFilter; |
| |
| /** |
| * If the layer can be rendered as a mesh, this is non-null. |
| */ |
| TextureVertex* mesh; |
| uint16_t* meshIndices; |
| GLsizei meshElementCount; |
| |
| /** |
| * If set to true (by default), the layer can be reused. |
| */ |
| bool isCacheable; |
| |
| /** |
| * When set to true, this layer must be treated as a texture |
| * layer. |
| */ |
| bool isTextureLayer; |
| |
| /** |
| * Optional texture coordinates transform. |
| */ |
| mat4 texTransform; |
| }; // struct Layer |
| |
| }; // namespace uirenderer |
| }; // namespace android |
| |
| #endif // ANDROID_HWUI_LAYER_H |