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* Copyright (C) 2011 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
namespace android {
namespace uirenderer {
* Structure used by OpenGLRenderer::callDrawGLFunction() to pass and
* receive data from OpenGL functors.
struct DrawGlInfo {
// Input: current clip rect
int clipLeft;
int clipTop;
int clipRight;
int clipBottom;
// Input: current width/height of destination surface
int width;
int height;
// Input: is the render target an FBO
bool isLayer;
// Input: current transform matrix, in OpenGL format
float transform[16];
// Output: dirty region to redraw
float dirtyLeft;
float dirtyTop;
float dirtyRight;
float dirtyBottom;
* Values used as the "what" parameter of the functor.
enum Mode {
// Indicates that the functor is called to perform a draw
// Indicates the the functor is called only to perform
// processing and that no draw should be attempted
* Values used by OpenGL functors to tell the framework
* what to do next.
enum Status {
// The functor is done
kStatusDone = 0x0,
// The functor is requesting a redraw (the clip rect
// used by the redraw is specified by DrawGlInfo.)
// The rest of the UI might redraw too.
kStatusDraw = 0x1,
// The functor needs to be invoked again but will
// not redraw. Only the functor is invoked again
// (unless another functor requests a redraw.)
kStatusInvoke = 0x2,
// DisplayList actually issued GL drawing commands.
// This is used to signal the HardwareRenderer that the
// buffers should be flipped - otherwise, there were no
// changes to the buffer, so no need to flip. Some hardware
// has issues with stale buffer contents when no GL
// commands are issued.
kStatusDrew = 0x4
}; // struct DrawGlInfo
}; // namespace uirenderer
}; // namespace android