void TexShader::use(const AffineTransform& transform, const AffineTransform& texTransform, int sampler, float alpha)
{
m_context->useProgram(m_program);
float matrix[9];
affineTo3x3(transform, matrix);
m_context->uniformMatrix3fv(m_matrixLocation, false /*transpose*/, matrix, 1 /*count*/);
float texMatrix[9];
affineTo3x3(texTransform, texMatrix);
m_context->uniformMatrix3fv(m_texMatrixLocation, false /*transpose*/, texMatrix, 1 /*count*/);
m_context->uniform1i(m_samplerLocation, sampler);
m_context->uniform1f(m_alphaLocation, alpha);
m_context->vertexAttribPointer(m_positionLocation, 2, GraphicsContext3D::FLOAT, false, 0, 0);
m_context->enableVertexAttribArray(m_positionLocation);
}
void ConvolutionShader::use(const AffineTransform& transform, const AffineTransform& texTransform, const float* kernel, int kernelWidth, float imageIncrement[2])
{
m_context->useProgram(m_program);
float matrix[9];
affineTo3x3(transform, matrix);
m_context->uniformMatrix3fv(m_matrixLocation, false /*transpose*/, matrix, 1 /*count*/);
float texMatrix[9];
affineTo3x3(texTransform, texMatrix);
m_context->uniformMatrix3fv(m_texMatrixLocation, false /*transpose*/, texMatrix, 1 /*count*/);
m_context->uniform2f(m_imageIncrementLocation, imageIncrement[0], imageIncrement[1]);
// For now, we always use texture unit 0. If that ever changes, we should
// expose this parameter to the caller.
m_context->uniform1i(m_imageLocation, 0);
if (kernelWidth > m_kernelWidth)
kernelWidth = m_kernelWidth;
m_context->uniform1fv(m_kernelLocation, const_cast<float*>(kernel), kernelWidth);
m_context->vertexAttribPointer(m_positionLocation, 2, GraphicsContext3D::FLOAT, false, 0, 0);
m_context->enableVertexAttribArray(m_positionLocation);
}
