5b3b35296e
This optimization is currently disabled until Launcher is modified to take advantage of it. The optimization can be enabled by turning on RENDER_LAYERS_AS_REGIONS in the OpenGLRenderer.h file. Change-Id: I2fdf59d0f4dc690a3d7f712173ab8db3848b27b1
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HWUI_LINE_H
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#define ANDROID_HWUI_LINE_H
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#include <GLES2/gl2.h>
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#include <cmath>
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#include <sys/types.h>
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#include "Patch.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Globals
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///////////////////////////////////////////////////////////////////////////////
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// Alpha8 texture used to perform texture anti-aliasing
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static const uint8_t gLineTexture[] = {
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0, 0, 0, 0, 0,
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0, 255, 255, 255, 0,
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0, 255, 255, 255, 0,
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0, 255, 255, 255, 0,
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0, 0, 0, 0, 0
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};
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static const GLsizei gLineTextureWidth = 5;
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static const GLsizei gLineTextureHeight = 5;
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static const float gLineAABias = 1.0f;
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///////////////////////////////////////////////////////////////////////////////
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// Line
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///////////////////////////////////////////////////////////////////////////////
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class Line {
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public:
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Line(): mXDivsCount(2), mYDivsCount(2) {
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mPatch = new Patch(mXDivsCount, mYDivsCount);
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mXDivs = new int32_t[mXDivsCount];
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mYDivs = new int32_t[mYDivsCount];
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mXDivs[0] = mYDivs[0] = 2;
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mXDivs[1] = mYDivs[1] = 3;
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glGenTextures(1, &mTexture);
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glBindTexture(GL_TEXTURE_2D, mTexture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, gLineTextureWidth, gLineTextureHeight, 0,
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GL_ALPHA, GL_UNSIGNED_BYTE, gLineTexture);
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}
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~Line() {
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delete mPatch;
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delete[] mXDivs;
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delete[] mYDivs;
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glDeleteTextures(1, &mTexture);
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}
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inline float getLength(float x1, float y1, float x2, float y2) {
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return sqrtf((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
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}
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void update(float x1, float y1, float x2, float y2, float lineWidth, float& tx, float& ty) {
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const float length = getLength(x1, y1, x2, y2);
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const float half = lineWidth * 0.5f;
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mPatch->updateVertices(gLineTextureWidth, gLineTextureHeight,
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-gLineAABias, -half - gLineAABias, length + gLineAABias, half + gLineAABias,
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mXDivs, mYDivs, mXDivsCount, mYDivsCount);
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tx = -gLineAABias;
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ty = lineWidth <= 1.0f ? -gLineAABias : -half - gLineAABias;
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}
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inline GLuint getMeshBuffer() const {
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return mPatch->meshBuffer;
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}
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inline GLsizei getElementsCount() const {
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return mPatch->verticesCount;
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}
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inline GLuint getTexture() const {
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return mTexture;
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}
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private:
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uint32_t mXDivsCount;
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uint32_t mYDivsCount;
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int32_t* mXDivs;
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int32_t* mYDivs;
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Patch* mPatch;
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GLuint mTexture;
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}; // class Line
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}; // namespace uirenderer
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}; // namespace android
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#endif // ANDROID_HWUI_LINE_H
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