Long live Qt 4.5!

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diff --git a/src/opengl/gl2paintengineex/glgc_shader_source.h b/src/opengl/gl2paintengineex/glgc_shader_source.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** 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
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef GLGC_SHADER_SOURCE_H
+#define GLGC_SHADER_SOURCE_H
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(OpenGL)
+
+static const char* qglslImageVertexShader = "\
+    attribute highp vec4    inputVertex; \
+    attribute lowp  vec2    textureCoord; \
+    uniform   highp mat4    pmvMatrix; \
+    varying   lowp  vec2    fragTextureCoord; \
+    void main(void) \
+    {\
+            gl_Position = pmvMatrix * inputVertex;\
+            fragTextureCoord = textureCoord; \
+    }";
+
+static const char* qglslImageFragmentShader = "\
+    varying lowp vec2      fragTextureCoord;\
+    uniform      sampler2D textureSampler;\
+    uniform lowp float     opacity; \
+    void main(void) \
+    {\
+        gl_FragColor = texture2D(textureSampler, fragTextureCoord) * opacity; \
+    }";
+
+static const char* qglslTextFragmentShader = "\
+    varying lowp    vec2      fragTextureCoord;\
+    uniform mediump vec4      fragmentColor;\
+    uniform         sampler2D textureSampler;\
+    void main(void) \
+    {\
+        highp vec4 tex = texture2D(textureSampler, fragTextureCoord); \
+        tex = fragmentColor * tex.r; \
+        gl_FragColor = tex; \
+    }";
+
+static const char* qglslDefaultVertexShader = "\
+    attribute highp vec4    inputVertex;\
+    uniform   highp mat4    pmvMatrix;\
+    void main(void)\
+    {\
+            gl_Position = pmvMatrix * inputVertex;\
+    }";
+
+static const char* qglslSimpleFragmentShader = "\
+    void main (void)\
+    {\
+            gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);\
+    }";
+
+
+/**** FRAGMENT SHADER MAIN FUNCTIONS ****/
+// NOTE: Currently, the engine assumes brushes return colors already in pre-multiplied
+//       format. However, this may change if we add support for non-premultiplied 
+
+static const char* qglslNoOpacityFragmentShaderMain = "\n\
+    mediump vec4 brush();\
+    void main (void)\
+    {\
+            gl_FragColor = brush();\
+    }\n";
+
+static const char* qglslFragmentShaderMain = "\n\
+    mediump vec4    brush();\
+    uniform lowp    float   opacity; \
+    void main (void)\
+    {\
+        gl_FragColor = brush() * opacity;\
+    }\n";
+
+
+
+/**** BRUSH SHADERS ****/
+
+// This should never actually be used
+static const char* qglslNoBrushFragmentShader = "\n\
+    mediump vec4 brush() { \
+        discard; \
+        return vec4(1.0, 0.8, 0.8, 1.0);\
+    }\n";
+
+// Solid Fill Brush
+static const char* qglslSolidBrushFragmentShader = "\n\
+    uniform mediump vec4 fragmentColor; \
+    mediump vec4 brush() { \
+        return fragmentColor;\
+    }\n";
+
+// Texture Brush
+static const char* qglslTextureBrushVertexShader = "\
+    attribute highp   vec4  inputVertex; \
+    uniform   highp   mat4  pmvMatrix; \
+    uniform   mediump vec2  halfViewportSize; \
+    uniform   mediump vec2  invertedTextureSize; \
+    uniform   mediump mat3  brushTransform; \
+    varying   mediump vec2  texCoords; \
+    void main(void) { \
+            gl_Position = pmvMatrix * inputVertex;\
+            gl_Position.xy = gl_Position.xy / gl_Position.w; \
+            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; \
+            texCoords.xy = (hTexCoords.xy * invertedTextureSize) * gl_Position.w; \
+            texCoords.y = -texCoords.y; \
+    }";
+
+static const char* qglslTextureBrushFragmentShader = "\n\
+    varying mediump vec2      texCoords;\
+    uniform         sampler2D brushTexture;\
+    mediump vec4 brush() { \
+        return texture2D(brushTexture, texCoords); \
+    }\n";
+
+
+// Pattern Brush - This assumes the texture size is 8x8 and thus, the inverted size is 0.125
+static const char* qglslPatternBrushVertexShader = "\
+    attribute highp   vec4  inputVertex; \
+    uniform   highp   mat4  pmvMatrix; \
+    uniform   mediump vec2  halfViewportSize; \
+    uniform   mediump vec2  invertedTextureSize; \
+    uniform   mediump mat3  brushTransform; \
+    varying   mediump vec2  texCoords; \
+    void main(void) { \
+            gl_Position = pmvMatrix * inputVertex;\
+            gl_Position.xy = gl_Position.xy / gl_Position.w; \
+            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; \
+            texCoords.xy = (hTexCoords.xy * 0.125) * invertedHTexCoordsZ; \
+            texCoords.y = -texCoords.y; \
+    }";
+
+static const char* qglslPatternBrushFragmentShader = "\n\
+    uniform         sampler2D brushTexture;\
+    uniform lowp    vec4      patternColor; \
+    varying mediump vec2      texCoords;\
+    mediump vec4 brush() { \
+        return patternColor * texture2D(brushTexture, texCoords).r; \
+    }\n";
+
+
+// Linear Gradient Brush
+static const char* qglslLinearGradientBrushVertexShader = "\
+    attribute highp   vec4  inputVertex; \
+    uniform   highp   mat4  pmvMatrix; \
+    uniform   mediump vec2  halfViewportSize; \
+    uniform   highp   vec3  linearData; \
+    uniform   mediump mat3  brushTransform; \
+    varying   mediump float index ; \
+    void main() { \
+        gl_Position = pmvMatrix * inputVertex;\
+        gl_Position.xy = gl_Position.xy / gl_Position.w; \
+        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* qglslLinearGradientBrushFragmentShader = "\n\
+    uniform         sampler2D   brushTexture; \
+    varying mediump float       index; \
+    mediump vec4 brush() { \
+        mediump vec2 val = vec2(index, 0.5); \
+        return texture2D(brushTexture, val); \
+    }\n";
+
+
+static const char* qglslRadialGradientBrushVertexShader = "\
+    attribute highp   vec4 inputVertex;\
+    uniform   highp   mat4 pmvMatrix;\
+    uniform   mediump vec2 halfViewportSize; \
+    uniform   highp   mat3 brushTransform; \
+    uniform   highp   vec2 fmp; \
+    varying   highp   float b; \
+    varying   highp   vec2  A; \
+    void main(void) \
+    {\
+        gl_Position = pmvMatrix * inputVertex;\
+        gl_Position.xy = gl_Position.xy / gl_Position.w; \
+        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 * fmp * (A.x + A.y); \
+\
+    }";
+
+static const char* qglslRadialGradientBrushFragmentShader = "\n\
+    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; \
+\
+    mediump vec4 brush() { \
+        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); \
+    }\n";
+
+static const char* qglslConicalGradientBrushVertexShader = "\
+    attribute highp vec4    inputVertex;\
+    uniform   highp mat4    pmvMatrix;\
+    uniform   mediump vec2  halfViewportSize; \
+    uniform highp   mat3    brushTransform; \
+    varying highp   vec2    A; \
+    void main(void)\
+    {\
+        gl_Position = pmvMatrix * inputVertex;\
+        gl_Position.xy = gl_Position.xy / gl_Position.w; \
+        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* qglslConicalGradientBrushFragmentShader = "\n\
+    #define INVERSE_2PI 0.1591549430918953358 \n\
+    uniform         sampler2D   brushTexture; \
+    uniform mediump float       angle; \
+    varying highp   vec2        A; \
+    mediump vec4 brush() { \
+        if (abs(A.y) == abs(A.x)) \
+            A.y += 0.002; \
+        highp float t = (atan2(-A.y, A.x) + angle) * INVERSE_2PI; \
+        return texture2D(brushTexture, vec2(t - floor(t), 0.5)); \
+    }\n";
+
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // GLGC_SHADER_SOURCE_H