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kwin/blur: Add support for GLSL 1.40

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This commit is contained in:
Fredrik Höglund 2013-03-13 18:29:02 +01:00
parent eff09c2b6f
commit c652c8e1a8
1 changed files with 29 additions and 7 deletions
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36
effects/blur/blurshader.cpp
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@ -247,19 +247,34 @@ void GLSLBlurShader::init()
offsets << vec4;
}
#ifdef KWIN_HAVE_OPENGLES
const bool glsl_140 = false;
#else
const bool glsl_140 = GLPlatform::instance()->glslVersion() >= kVersionNumber(1, 40);
#endif
QByteArray vertexSource;
QByteArray fragmentSource;
const QByteArray attribute = glsl_140 ? "in" : "attribute";
const QByteArray varying_in = glsl_140 ? "noperspective in" : "varying";
const QByteArray varying_out = glsl_140 ? "noperspective out" : "varying";
const QByteArray texture2D = glsl_140 ? "texture" : "texture2D";
const QByteArray fragColor = glsl_140 ? "fragColor" : "gl_FragColor";
// Vertex shader
// ===================================================================
QTextStream stream(&vertexSource);
if (glsl_140)
stream << "#version 140\n\n";
stream << "uniform mat4 u_modelViewProjectionMatrix;\n";
stream << "uniform mat4 u_textureMatrix;\n";
stream << "uniform vec2 pixelSize;\n\n";
stream << "attribute vec4 vertex;\n";
stream << "attribute vec4 texCoord;\n\n";
stream << "varying vec4 samplePos[" << std::ceil(size / 2.0) << "];\n";
stream << attribute << " vec4 vertex;\n";
stream << attribute << " vec4 texCoord;\n\n";
stream << varying_out << " vec4 samplePos[" << std::ceil(size / 2.0) << "];\n";
stream << "\n";
stream << "void main(void)\n";
stream << "{\n";
@ -279,19 +294,26 @@ void GLSLBlurShader::init()
// ===================================================================
QTextStream stream2(&fragmentSource);
if (glsl_140)
stream2 << "#version 140\n\n";
stream2 << "uniform sampler2D texUnit;\n";
stream2 << "varying vec4 samplePos[" << std::ceil(size / 2.0) << "];\n\n";
stream2 << varying_in << " vec4 samplePos[" << std::ceil(size / 2.0) << "];\n\n";
for (int i = 0; i <= center; i++)
stream2 << "const float kernel" << i << " = " << kernel[i].g << ";\n";
stream2 << "\n";
if (glsl_140)
stream2 << "out vec4 fragColor;\n\n";
stream2 << "void main(void)\n";
stream2 << "{\n";
stream2 << " vec4 sum = texture2D(texUnit, samplePos[0].st) * kernel0;\n";
stream2 << " vec4 sum = " << texture2D << "(texUnit, samplePos[0].st) * kernel0;\n";
for (int i = 1, j = -center + 1; i < size; i++, j++)
stream2 << " sum = sum + texture2D(texUnit, samplePos[" << i / 2
stream2 << " sum = sum + " << texture2D << "(texUnit, samplePos[" << i / 2
<< ((i % 2) ? "].pq)" : "].st)") << " * kernel" << center - qAbs(j) << ";\n";
stream2 << " gl_FragColor = sum;\n";
stream2 << " " << fragColor << " = sum;\n";
stream2 << "}\n";
stream2.flush();