1/*
2 * Copyright (c) 2010, Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32
33#if ENABLE(ACCELERATED_2D_CANVAS)
34
35#include "SolidFillShader.h"
36
37#include "Color.h"
38#include "GraphicsContext3D.h"
39
40namespace WebCore {
41
42SolidFillShader::SolidFillShader(GraphicsContext3D* context, unsigned program)
43    : Shader(context, program)
44{
45    m_matrixLocation = context->getUniformLocation(program, "matrix");
46    m_colorLocation = context->getUniformLocation(program, "color");
47    m_positionLocation = context->getAttribLocation(program, "position");
48}
49
50PassOwnPtr<SolidFillShader> SolidFillShader::create(GraphicsContext3D* context)
51{
52    unsigned program = loadProgram(context,
53                                   generateVertex(Shader::TwoDimensional, Shader::SolidFill),
54                                   generateFragment(Shader::TwoDimensional, Shader::SolidFill, Shader::NotAntialiased));
55    if (!program)
56        return 0;
57    return new SolidFillShader(context, program);
58}
59
60void SolidFillShader::use(const AffineTransform& transform, const Color& color)
61{
62    m_context->useProgram(m_program);
63
64    float rgba[4];
65    color.getRGBA(rgba[0], rgba[1], rgba[2], rgba[3]);
66    m_context->uniform4f(m_colorLocation, rgba[0] * rgba[3], rgba[1] * rgba[3], rgba[2] * rgba[3], rgba[3]);
67
68    float matrix[9];
69    affineTo3x3(transform, matrix);
70    m_context->uniformMatrix3fv(m_matrixLocation, false /*transpose*/, matrix, 1 /*count*/);
71
72    m_context->vertexAttribPointer(m_positionLocation, 2, GraphicsContext3D::FLOAT, false, 0, 0);
73
74    m_context->enableVertexAttribArray(m_positionLocation);
75}
76
77}
78
79#endif
80