path: root/src/opengl/gl2paintengineex/qglengineshadersource_p.h

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**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
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** This file is part of the QtOpenGL module of the Qt Toolkit.
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** GNU Lesser General Public License Usage
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
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//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//


#ifndef QGL_ENGINE_SHADER_SOURCE_H
#define QGL_ENGINE_SHADER_SOURCE_H

#include "qglengineshadermanager_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(OpenGL)


static const char* const qglslMainVertexShader = "\
    void setPosition();\
    void main(void)\
    {\
            setPosition();\
    }";

static const char* const qglslMainWithTexCoordsVertexShader = "\
    attribute lowp  vec2    textureCoordArray; \
    varying   lowp  vec2    textureCoords; \
    void setPosition();\
    void main(void) \
    {\
            setPosition();\
            textureCoords = textureCoordArray; \
    }";


static const char* const qglslPositionOnlyVertexShader = "\
    attribute highp vec4    vertexCoordsArray;\
    uniform   highp mat4    pmvMatrix;\
    uniform   highp float   depth;\
    void setPosition(void)\
    {\
            gl_Position = pmvMatrix * vertexCoordsArray;\
            gl_Position.z = depth;\
    }";

static const char* const qglslUntransformedPositionVertexShader = "\
    attribute highp vec4    vertexCoordsArray;\
    uniform   highp float   depth;\
    void setPosition(void)\
    {\
            gl_Position = vertexCoordsArray;\
            gl_Position.z = depth;\
    }";

// Pattern Brush - This assumes the texture size is 8x8 and thus, the inverted size is 0.125
static const char* const qglslPositionWithPatternBrushVertexShader = "\
    attribute highp   vec4  vertexCoordsArray; \
    uniform   highp   mat4  pmvMatrix; \
    uniform   mediump vec2  halfViewportSize; \
    uniform   mediump vec2  invertedTextureSize; \
    uniform   mediump mat3  brushTransform; \
    varying   mediump vec2  patternTexCoords; \
    uniform   highp   float depth;\
    void setPosition(void) { \
            gl_Position = pmvMatrix * vertexCoordsArray;\
            gl_Position.xy = gl_Position.xy / gl_Position.w; \
            gl_Position.z = depth;\
            mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
            mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
            mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
            gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
            gl_Position.w = invertedHTexCoordsZ; \
            patternTexCoords.xy = (hTexCoords.xy * 0.125) * invertedHTexCoordsZ; \
            patternTexCoords.y = -patternTexCoords.y; \
    }";

static const char* const qglslAffinePositionWithPatternBrushVertexShader
                 = qglslPositionWithPatternBrushVertexShader;

static const char* const qglslPatternBrushSrcFragmentShader = "\
    uniform         sampler2D brushTexture;\
    uniform lowp    vec4      patternColor; \
    varying mediump vec2      patternTexCoords;\
    lowp vec4 srcPixel() { \
        return patternColor * texture2D(brushTexture, patternTexCoords).r; \
    }\n";


// Linear Gradient Brush
static const char* const qglslPositionWithLinearGradientBrushVertexShader = "\
    attribute highp   vec4  vertexCoordsArray; \
    uniform   highp   mat4  pmvMatrix; \
    uniform   mediump vec2  halfViewportSize; \
    uniform   highp   vec3  linearData; \
    uniform   highp   mat3  brushTransform; \
    varying   mediump float index ; \
    uniform   highp   float depth;\
    void setPosition() { \
        gl_Position = pmvMatrix * vertexCoordsArray;\
        gl_Position.xy = gl_Position.xy / gl_Position.w; \
        gl_Position.z = depth;\
        mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
        mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
        mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
        gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
        gl_Position.w = invertedHTexCoordsZ; \
        index = (dot(linearData.xy, hTexCoords.xy) * linearData.z) * invertedHTexCoordsZ; \
    }";

static const char* const qglslAffinePositionWithLinearGradientBrushVertexShader
                 = qglslPositionWithLinearGradientBrushVertexShader;

static const char* const qglslLinearGradientBrushSrcFragmentShader = "\
    uniform         sampler2D   brushTexture; \
    varying mediump float       index; \
    lowp vec4 srcPixel() { \
        mediump vec2 val = vec2(index, 0.5); \
        return texture2D(brushTexture, val); \
    }\n";


// Conical Gradient Brush
static const char* const qglslPositionWithConicalGradientBrushVertexShader = "\
    attribute highp   vec4  vertexCoordsArray;\
    uniform   highp   mat4  pmvMatrix;\
    uniform   mediump vec2  halfViewportSize; \
    uniform   highp   mat3  brushTransform; \
    varying   highp   vec2  A; \
    uniform   highp   float depth;\
    void setPosition(void)\
    {\
        gl_Position = pmvMatrix * vertexCoordsArray;\
        gl_Position.xy = gl_Position.xy / gl_Position.w; \
        gl_Position.z = depth; \
        mediump vec2  viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
        mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
        mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
        gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
        gl_Position.w = invertedHTexCoordsZ; \
        A = hTexCoords.xy * invertedHTexCoordsZ; \
    }";

static const char* const qglslAffinePositionWithConicalGradientBrushVertexShader
                 = qglslPositionWithConicalGradientBrushVertexShader;

static const char* const qglslConicalGradientBrushSrcFragmentShader = "\n\
    #define INVERSE_2PI 0.1591549430918953358 \n\
    uniform         sampler2D   brushTexture; \n\
    uniform mediump float       angle; \
    varying highp   vec2        A; \
    lowp vec4 srcPixel() { \
        highp float t; \
        if (abs(A.y) == abs(A.x)) \
            t = (atan(-A.y + 0.002, A.x) + angle) * INVERSE_2PI; \
        else \
            t = (atan(-A.y, A.x) + angle) * INVERSE_2PI; \
        return texture2D(brushTexture, vec2(t - floor(t), 0.5)); \
    }";


// Radial Gradient Brush
static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\
    attribute highp   vec4 vertexCoordsArray;\
    uniform   highp   mat4 pmvMatrix;\
    uniform   mediump vec2 halfViewportSize; \
    uniform   highp   mat3 brushTransform; \
    uniform   highp   vec2 fmp; \
    varying   highp   float b; \
    varying   highp   vec2  A; \
    uniform   highp   float depth;\
    void setPosition(void) \
    {\
        gl_Position = pmvMatrix * vertexCoordsArray;\
        gl_Position.xy = gl_Position.xy / gl_Position.w; \
        gl_Position.z = depth; \
        mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
        mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
        mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
        gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
        gl_Position.w = invertedHTexCoordsZ; \
        A = hTexCoords.xy * invertedHTexCoordsZ; \
        b = 2.0 * dot(A, fmp); \
    }";

static const char* const qglslAffinePositionWithRadialGradientBrushVertexShader
                 = qglslPositionWithRadialGradientBrushVertexShader;

static const char* const qglslRadialGradientBrushSrcFragmentShader = "\
    uniform         sampler2D   brushTexture; \
    uniform highp   float       fmp2_m_radius2; \
    uniform highp   float       inverse_2_fmp2_m_radius2; \
    varying highp   float       b; \
    varying highp   vec2        A; \
    lowp vec4 srcPixel() { \
        highp float c = -dot(A, A); \
        highp vec2 val = vec2((-b + sqrt(b*b - 4.0*fmp2_m_radius2*c)) * inverse_2_fmp2_m_radius2, 0.5); \
        return texture2D(brushTexture, val); \
    }";


// Texture Brush
static const char* const qglslPositionWithTextureBrushVertexShader = "\
    attribute highp   vec4  vertexCoordsArray; \
    uniform   highp   mat4  pmvMatrix; \
    uniform   mediump vec2  halfViewportSize; \
    uniform   mediump vec2  invertedTextureSize; \
    uniform   mediump mat3  brushTransform; \
    varying   mediump vec2  brushTextureCoords; \
    uniform   highp   float depth;\
    void setPosition(void) { \
            gl_Position = pmvMatrix * vertexCoordsArray;\
            gl_Position.xy = gl_Position.xy / gl_Position.w; \
            gl_Position.z = depth; \
            mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \
            mediump vec3 hTexCoords = brushTransform * vec3(viewportCoords, 1); \
            mediump float invertedHTexCoordsZ = 1.0 / hTexCoords.z; \
            gl_Position.xy = gl_Position.xy * invertedHTexCoordsZ; \
            gl_Position.w = invertedHTexCoordsZ; \
            brushTextureCoords.xy = (hTexCoords.xy * invertedTextureSize) * gl_Position.w; \
            brushTextureCoords.y = -brushTextureCoords.y; \
    }";

static const char* const qglslAffinePositionWithTextureBrushVertexShader
                 = qglslPositionWithTextureBrushVertexShader;

static const char* const qglslTextureBrushSrcFragmentShader = "\
    varying mediump vec2      brushTextureCoords; \
    uniform         sampler2D brushTexture; \
    lowp vec4 srcPixel() { \
        return texture2D(brushTexture, brushTextureCoords); \
    }";


// Solid Fill Brush
static const char* const qglslSolidBrushSrcFragmentShader = "\
    uniform lowp vec4 fragmentColor; \
    lowp vec4 srcPixel() { \
        return fragmentColor; \
    }";

static const char* const qglslImageSrcFragmentShader = "\
    varying highp vec2      textureCoords; \
    uniform       sampler2D imageTexture; \
    lowp vec4 srcPixel() { \
        return texture2D(imageTexture, textureCoords); \
    }";

static const char* const qglslNonPremultipliedImageSrcFragmentShader = "\
    varying highp vec2      textureCoords; \
    uniform       sampler2D imageTexture; \
    lowp vec4 srcPixel() { \
        lowp vec4 sample = texture2D(imageTexture, textureCoords); \
        sample.rgb = sample.rgb * sample.a; \
        return sample; \
    }";

static const char* const qglslShockingPinkSrcFragmentShader = "\
    lowp vec4 srcPixel() { \
        return vec4(0.98, 0.06, 0.75, 1.0); \
    }";


static const char* const qglslMainFragmentShader_CMO = "\
    uniform lowp float globalOpacity; \
    lowp vec4 srcPixel(); \
    lowp vec4 applyMask(lowp vec4); \
    lowp vec4 compose(lowp vec4); \
    void main() { \
        gl_FragColor = applyMask(compose(srcPixel()*globalOpacity))); \
    }";

static const char* const qglslMainFragmentShader_CM = "\
    lowp vec4 srcPixel(); \
    lowp vec4 applyMask(lowp vec4); \
    lowp vec4 compose(lowp vec4); \
    void main() { \
        gl_FragColor = applyMask(compose(srcPixel())); \
    }";

static const char* const qglslMainFragmentShader_MO = "\
    uniform lowp float globalOpacity; \
    lowp vec4 srcPixel(); \
    lowp vec4 applyMask(lowp vec4); \
    void main() { \
        gl_FragColor = applyMask(srcPixel()*globalOpacity); \
    }";

static const char* const qglslMainFragmentShader_M = "\
    lowp vec4 srcPixel(); \
    lowp vec4 applyMask(lowp vec4); \
    void main() { \
        gl_FragColor = applyMask(srcPixel()); \
    }";

static const char* const qglslMainFragmentShader_CO = "\
    uniform lowp float globalOpacity; \
    lowp vec4 srcPixel(); \
    lowp vec4 compose(lowp vec4); \
    void main() { \
        gl_FragColor = compose(srcPixel()*globalOpacity); \
    }";

static const char* const qglslMainFragmentShader_C = "\
    lowp vec4 srcPixel(); \
    lowp vec4 compose(lowp vec4); \
    void main() { \
        gl_FragColor = compose(srcPixel()); \
    }";

static const char* const qglslMainFragmentShader_O = "\
    uniform lowp float globalOpacity; \
    lowp vec4 srcPixel(); \
    void main() { \
        gl_FragColor = srcPixel()*globalOpacity; \
    }";

static const char* const qglslMainFragmentShader = "\
    lowp vec4 srcPixel(); \
    void main() { \
        gl_FragColor = srcPixel(); \
    }";

static const char* const qglslMaskFragmentShader = "\
    varying highp   vec2      textureCoords;\
    uniform         sampler2D maskTexture;\
    lowp vec4 applyMask(lowp vec4 src) \
    {\
        lowp vec4 mask = texture2D(maskTexture, textureCoords); \
        return src * mask.a; \
    }";

/*
    Left to implement:
        RgbMaskFragmentShader,
        RgbMaskWithGammaFragmentShader,

        MultiplyCompositionModeFragmentShader,
        ScreenCompositionModeFragmentShader,
        OverlayCompositionModeFragmentShader,
        DarkenCompositionModeFragmentShader,
        LightenCompositionModeFragmentShader,
        ColorDodgeCompositionModeFragmentShader,
        ColorBurnCompositionModeFragmentShader,
        HardLightCompositionModeFragmentShader,
        SoftLightCompositionModeFragmentShader,
        DifferenceCompositionModeFragmentShader,
        ExclusionCompositionModeFragmentShader,
*/

QT_END_NAMESPACE

QT_END_HEADER

#endif // GLGC_SHADER_SOURCE_H