147 lines
3.9 KiB
C++
147 lines
3.9 KiB
C++
/*
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* Copyright © 2010 Fredrik Höglund <fredrik@kde.org>
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* Copyright © 2018 Alex Nemeth <alex.nemeth329@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. if not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef BLURSHADER_H
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#define BLURSHADER_H
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#include <kwinglutils.h>
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#include <QVector2D>
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#include <QVector4D>
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class QMatrix4x4;
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namespace KWin
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{
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class BlurShader
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{
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public:
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BlurShader();
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virtual ~BlurShader();
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static BlurShader *create();
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bool isValid() const {
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return mValid;
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}
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virtual void setModelViewProjectionMatrix(const QMatrix4x4 &matrix) = 0;
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virtual void setOffset(float offset) = 0;
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virtual void setTargetTextureSize(QSize renderTextureSize) = 0;
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virtual void setNoiseTextureSize(QSize noiseTextureSize) = 0;
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virtual void setTexturePosition(QPoint texPos) = 0;
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virtual void setBlurRect(QRect blurRect, QSize screenSize) = 0;
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enum SampleType {
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DownSampleType,
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UpSampleType,
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CopySampleType,
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NoiseSampleType
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};
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virtual void bind(SampleType sampleType) = 0;
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virtual void unbind() = 0;
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protected:
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void setIsValid(bool value) {
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mValid = value;
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}
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virtual void init() = 0;
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virtual void reset() = 0;
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private:
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bool mValid;
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};
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// ----------------------------------------------------------------------------
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class GLSLBlurShader : public BlurShader
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{
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public:
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GLSLBlurShader();
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~GLSLBlurShader();
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void bind(SampleType sampleType) override final;
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void unbind() override final;
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void setModelViewProjectionMatrix(const QMatrix4x4 &matrix) override final;
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void setOffset(float offset) override final;
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void setTargetTextureSize(QSize renderTextureSize) override final;
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void setNoiseTextureSize(QSize noiseTextureSize) override final;
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void setTexturePosition(QPoint texPos) override final;
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void setBlurRect(QRect blurRect, QSize screenSize) override final;
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protected:
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void init() override final;
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void reset() override final;
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private:
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GLShader *m_shaderDownsample = nullptr;
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GLShader *m_shaderUpsample = nullptr;
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GLShader *m_shaderCopysample = nullptr;
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GLShader *m_shaderNoisesample = nullptr;
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int m_mvpMatrixLocationDownsample;
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int m_offsetLocationDownsample;
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int m_renderTextureSizeLocationDownsample;
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int m_halfpixelLocationDownsample;
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int m_mvpMatrixLocationUpsample;
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int m_offsetLocationUpsample;
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int m_renderTextureSizeLocationUpsample;
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int m_halfpixelLocationUpsample;
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int m_mvpMatrixLocationCopysample;
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int m_renderTextureSizeLocationCopysample;
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int m_blurRectLocationCopysample;
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int m_mvpMatrixLocationNoisesample;
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int m_offsetLocationNoisesample;
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int m_renderTextureSizeLocationNoisesample;
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int m_noiseTextureSizeLocationNoisesample;
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int m_texStartPosLocationNoisesample;
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int m_halfpixelLocationNoisesample;
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//Caching uniform values to aviod unnecessary setUniform calls
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int m_activeSampleType;
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float m_offsetDownsample;
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QMatrix4x4 m_matrixDownsample;
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float m_offsetUpsample;
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QMatrix4x4 m_matrixUpsample;
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QMatrix4x4 m_matrixCopysample;
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QRect m_blurRectCopysample;
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float m_offsetNoisesample;
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QVector2D m_noiseTextureSizeNoisesample;
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QMatrix4x4 m_matrixNoisesample;
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};
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} // namespace KWin
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#endif
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