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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "stream_video_node.h"
#include <QtQuick/qsgtexture.h>
class StreamVideoMaterialShader : public QSGMaterialShader
{
public:
virtual void updateState(const RenderState &state, QSGMaterial *newMaterial, QSGMaterial *oldMaterial);
virtual char const *const *attributeNames() const Q_DECL_OVERRIDE {
static const char *names[] = {
"a_position",
"a_texCoord",
0
};
return names;
}
protected:
virtual const char *vertexShader() const Q_DECL_OVERRIDE {
// Keep in sync with cc::VertexShaderVideoTransform
const char *shader =
"attribute highp vec4 a_position;\n"
"attribute mediump vec2 a_texCoord;\n"
"uniform highp mat4 matrix;\n"
"uniform highp mat4 texMatrix;\n"
"varying mediump vec2 v_texCoord;\n"
"void main() {\n"
" gl_Position = matrix * a_position;\n"
" v_texCoord = vec4(texMatrix * vec4(a_texCoord.x, 1.0 - a_texCoord.y, 0.0, 1.0)).xy;\n"
"}";
return shader;
}
virtual const char *fragmentShader() const Q_DECL_OVERRIDE {
// Keep in sync with cc::FragmentShaderRGBATexAlpha
static const char *shader =
"#extension GL_OES_EGL_image_external : require\n"
"varying mediump vec2 v_texCoord;\n"
"uniform samplerExternalOES s_texture;\n"
"uniform lowp float alpha;\n"
"void main() {\n"
" lowp vec4 texColor = texture2D(s_texture, v_texCoord);\n"
" gl_FragColor = texColor * alpha;\n"
"}";
return shader;
}
virtual void initialize() {
m_id_matrix = program()->uniformLocation("matrix");
m_id_sTexture = program()->uniformLocation("s_texture");
m_id_texMatrix = program()->uniformLocation("texMatrix");
m_id_opacity = program()->uniformLocation("alpha");
}
int m_id_matrix;
int m_id_texMatrix;
int m_id_sTexture;
int m_id_opacity;
};
void StreamVideoMaterialShader::updateState(const RenderState &state, QSGMaterial *newMaterial, QSGMaterial *oldMaterial)
{
Q_UNUSED(oldMaterial);
StreamVideoMaterial *mat = static_cast<StreamVideoMaterial *>(newMaterial);
program()->setUniformValue(m_id_sTexture, 0);
mat->m_texture->bind();
if (state.isOpacityDirty())
program()->setUniformValue(m_id_opacity, state.opacity());
if (state.isMatrixDirty())
program()->setUniformValue(m_id_matrix, state.combinedMatrix());
program()->setUniformValue(m_id_texMatrix, mat->m_texMatrix);
}
StreamVideoMaterial::StreamVideoMaterial(QSGTexture *texture)
: m_texture(texture)
{
}
QSGMaterialShader *StreamVideoMaterial::createShader() const
{
return new StreamVideoMaterialShader;
}
StreamVideoNode::StreamVideoNode(QSGTexture *texture)
: m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4)
{
setGeometry(&m_geometry);
setFlag(QSGNode::OwnsMaterial);
m_material = new StreamVideoMaterial(texture);
setMaterial(m_material);
}
void StreamVideoNode::setRect(const QRectF &rect)
{
QSGGeometry::updateTexturedRectGeometry(geometry(), rect, QRectF(0, 0, 1, 1));
}
void StreamVideoNode::setTextureMatrix(const QMatrix4x4 &matrix)
{
m_material->m_texMatrix = matrix;
}
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