SolidFillShader.cpp   [plain text]

/*
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#include "config.h"

#if ENABLE(ACCELERATED_2D_CANVAS)

#include "SolidFillShader.h"

#include "Color.h"
#include "GraphicsContext3D.h"

namespace WebCore {

SolidFillShader::SolidFillShader(GraphicsContext3D* context, unsigned program)
    : Shader(context, program)
{
    m_matrixLocation = context->getUniformLocation(program, "matrix");
    m_colorLocation = context->getUniformLocation(program, "color");
    m_positionLocation = context->getAttribLocation(program, "position");
}

PassOwnPtr<SolidFillShader> SolidFillShader::create(GraphicsContext3D* context)
{
    unsigned program = loadProgram(context,
                                   generateVertex(Shader::TwoDimensional, Shader::SolidFill),
                                   generateFragment(Shader::TwoDimensional, Shader::SolidFill, Shader::NotAntialiased));
    if (!program)
        return nullptr;
    return adoptPtr(new SolidFillShader(context, program));
}

void SolidFillShader::use(const AffineTransform& transform, const Color& color)
{
    m_context->useProgram(m_program);

    float rgba[4];
    color.getRGBA(rgba[0], rgba[1], rgba[2], rgba[3]);
    m_context->uniform4f(m_colorLocation, rgba[0] * rgba[3], rgba[1] * rgba[3], rgba[2] * rgba[3], rgba[3]);

    float matrix[9];
    affineTo3x3(transform, matrix);
    m_context->uniformMatrix3fv(m_matrixLocation, false /*transpose*/, matrix, 1 /*count*/);

    m_context->vertexAttribPointer(m_positionLocation, 2, GraphicsContext3D::FLOAT, false, 0, 0);

    m_context->enableVertexAttribArray(m_positionLocation);
}

}

#endif