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/*
Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "TextureMapperShaderManager.h"
#if USE(ACCELERATED_COMPOSITING) && USE(TEXTURE_MAPPER)
#include "TextureMapperGL.h"
namespace WebCore {
#ifndef TEXMAP_OPENGL_ES_2
#define OES2_PRECISION_DEFINITIONS \
"#define lowp\n#define highp\n"
#define OES2_FRAGMENT_SHADER_DEFAULT_PRECISION
#else
#define OES2_PRECISION_DEFINITIONS
#define OES2_FRAGMENT_SHADER_DEFAULT_PRECISION \
"precision mediump float; \n"
#endif
#define VERTEX_SHADER(src...) OES2_PRECISION_DEFINITIONS#src
#define FRAGMENT_SHADER(src...) OES2_PRECISION_DEFINITIONS\
OES2_FRAGMENT_SHADER_DEFAULT_PRECISION\
#src
static const char* fragmentShaderSourceOpacityAndMask =
FRAGMENT_SHADER(
uniform sampler2D SourceTexture, MaskTexture;
uniform lowp float Opacity;
varying highp vec2 OutTexCoordSource, OutTexCoordMask;
void main(void)
{
lowp vec4 color = texture2D(SourceTexture, OutTexCoordSource);
lowp vec4 maskColor = texture2D(MaskTexture, OutTexCoordMask);
lowp float fragmentAlpha = Opacity * maskColor.a;
gl_FragColor = vec4(color.rgb * fragmentAlpha, color.a * fragmentAlpha);
}
);
static const char* vertexShaderSourceOpacityAndMask =
VERTEX_SHADER(
uniform mat4 InMatrix, InSourceMatrix, InMaskMatrix;
attribute vec4 InVertex;
varying highp vec2 OutTexCoordSource, OutTexCoordMask;
void main(void)
{
OutTexCoordSource = vec2(InSourceMatrix * InVertex);
OutTexCoordMask = vec2(InMaskMatrix * InVertex);
gl_Position = InMatrix * InVertex;
}
);
static const char* fragmentShaderSourceSimple =
FRAGMENT_SHADER(
uniform sampler2D SourceTexture;
uniform lowp float Opacity;
varying highp vec2 OutTexCoordSource;
void main(void)
{
lowp vec4 color = texture2D(SourceTexture, OutTexCoordSource);
gl_FragColor = vec4(color.rgb * Opacity, color.a * Opacity);
}
);
static const char* vertexShaderSourceSimple =
VERTEX_SHADER(
uniform mat4 InMatrix, InSourceMatrix;
attribute vec4 InVertex;
varying highp vec2 OutTexCoordSource;
void main(void)
{
OutTexCoordSource = vec2(InSourceMatrix * InVertex);
gl_Position = InMatrix * InVertex;
}
);
void TextureMapperShaderProgram::initializeProgram()
{
const char* vertexShaderSourceProgram = vertexShaderSource();
const char* fragmentShaderSourceProgram = fragmentShaderSource();
GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(vertexShader, 1, &vertexShaderSourceProgram, 0);
glShaderSource(fragmentShader, 1, &fragmentShaderSourceProgram, 0);
GLuint programID = glCreateProgram();
glCompileShader(vertexShader);
glCompileShader(fragmentShader);
glAttachShader(programID, vertexShader);
glAttachShader(programID, fragmentShader);
glLinkProgram(programID);
m_vertexAttrib = glGetAttribLocation(programID, "InVertex");
m_id = programID;
m_vertexShader = vertexShader;
m_fragmentShader = fragmentShader;
}
void TextureMapperShaderProgram::getUniformLocation(GLint &variable, const char* name)
{
variable = glGetUniformLocation(m_id, name);
ASSERT(variable >= 0);
}
TextureMapperShaderProgram::~TextureMapperShaderProgram()
{
GLuint programID = m_id;
if (!programID)
return;
glDetachShader(programID, m_vertexShader);
glDeleteShader(m_vertexShader);
glDetachShader(programID, m_fragmentShader);
glDeleteShader(m_fragmentShader);
glDeleteProgram(programID);
}
PassRefPtr<TextureMapperShaderProgramSimple> TextureMapperShaderProgramSimple::create()
{
return adoptRef(new TextureMapperShaderProgramSimple());
}
TextureMapperShaderProgramSimple::TextureMapperShaderProgramSimple()
{
initializeProgram();
getUniformLocation(m_sourceMatrixVariable, "InSourceMatrix");
getUniformLocation(m_matrixVariable, "InMatrix");
getUniformLocation(m_sourceTextureVariable, "SourceTexture");
getUniformLocation(m_opacityVariable, "Opacity");
}
const char* TextureMapperShaderProgramSimple::vertexShaderSource() const
{
return vertexShaderSourceSimple;
}
const char* TextureMapperShaderProgramSimple::fragmentShaderSource() const
{
return fragmentShaderSourceSimple;
}
void TextureMapperShaderProgramSimple::prepare(float opacity, const BitmapTexture* maskTexture)
{
glUniform1f(m_opacityVariable, opacity);
}
PassRefPtr<TextureMapperShaderProgramOpacityAndMask> TextureMapperShaderProgramOpacityAndMask::create()
{
return adoptRef(new TextureMapperShaderProgramOpacityAndMask());
}
TextureMapperShaderProgramOpacityAndMask::TextureMapperShaderProgramOpacityAndMask()
{
initializeProgram();
getUniformLocation(m_matrixVariable, "InMatrix");
getUniformLocation(m_sourceMatrixVariable, "InSourceMatrix");
getUniformLocation(m_maskMatrixVariable, "InMaskMatrix");
getUniformLocation(m_sourceTextureVariable, "SourceTexture");
getUniformLocation(m_maskTextureVariable, "MaskTexture");
getUniformLocation(m_opacityVariable, "Opacity");
}
const char* TextureMapperShaderProgramOpacityAndMask::vertexShaderSource() const
{
return vertexShaderSourceOpacityAndMask;
}
const char* TextureMapperShaderProgramOpacityAndMask::fragmentShaderSource() const
{
return fragmentShaderSourceOpacityAndMask;
}
void TextureMapperShaderProgramOpacityAndMask::prepare(float opacity, const BitmapTexture* maskTexture)
{
glUniform1f(m_opacityVariable, opacity);
if (!maskTexture || !maskTexture->isValid())
return;
const BitmapTextureGL* maskTextureGL = static_cast<const BitmapTextureGL*>(maskTexture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, maskTextureGL->id());
const GLfloat m4mask[] = {maskTextureGL->relativeSize().width(), 0, 0, 0,
0, maskTextureGL->relativeSize().height(), 0, 0,
0, 0, 1, 0,
0, 0, 0, 1};
glUniformMatrix4fv(m_maskMatrixVariable, 1, GL_FALSE, m4mask);
glUniform1i(m_maskTextureVariable, 1);
glActiveTexture(GL_TEXTURE0);
}
TextureMapperShaderManager::TextureMapperShaderManager()
{
ASSERT(initializeOpenGLShims());
}
TextureMapperShaderManager::~TextureMapperShaderManager()
{
m_textureMapperShaderProgramMap.clear();
}
};
#endif
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