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/*
* Copyright (c) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "Shader.h"
#include "AffineTransform.h"
#include "GraphicsContext3D.h"
#include <wtf/text/CString.h>
namespace WebCore {
// static
void Shader::affineTo3x3(const AffineTransform& transform, float mat[9])
{
mat[0] = transform.a();
mat[1] = transform.b();
mat[2] = 0.0f;
mat[3] = transform.c();
mat[4] = transform.d();
mat[5] = 0.0f;
mat[6] = transform.e();
mat[7] = transform.f();
mat[8] = 1.0f;
}
// static
unsigned Shader::loadShader(GraphicsContext3D* context, unsigned type, const char* shaderSource)
{
unsigned shader = context->createShader(type);
if (!shader)
return 0;
String shaderSourceStr(shaderSource);
context->shaderSource(shader, shaderSourceStr);
context->compileShader(shader);
int compileStatus;
context->getShaderiv(shader, GraphicsContext3D::COMPILE_STATUS, &compileStatus);
if (!compileStatus) {
String infoLog = context->getShaderInfoLog(shader);
LOG_ERROR("%s", infoLog.utf8().data());
context->deleteShader(shader);
return 0;
}
return shader;
}
// static
unsigned Shader::loadProgram(GraphicsContext3D* context, const char* vertexShaderSource, const char* fragmentShaderSource)
{
unsigned vertexShader = loadShader(context, GraphicsContext3D::VERTEX_SHADER, vertexShaderSource);
if (!vertexShader)
return 0;
unsigned fragmentShader = loadShader(context, GraphicsContext3D::FRAGMENT_SHADER, fragmentShaderSource);
if (!fragmentShader)
return 0;
unsigned program = context->createProgram();
if (!program)
return 0;
context->attachShader(program, vertexShader);
context->attachShader(program, fragmentShader);
context->linkProgram(program);
int linkStatus;
context->getProgramiv(program, GraphicsContext3D::LINK_STATUS, &linkStatus);
if (!linkStatus)
context->deleteProgram(program);
context->deleteShader(vertexShader);
context->deleteShader(fragmentShader);
return program;
}
Shader::Shader(GraphicsContext3D* context, unsigned program)
: m_context(context)
, m_program(program)
{
}
Shader::~Shader()
{
m_context->deleteProgram(m_program);
}
}
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