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Diffstat (limited to 'src/core/compositor/stream_video_node.cpp')
| -rw-r--r-- | src/core/compositor/stream_video_node.cpp | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/core/compositor/stream_video_node.cpp b/src/core/compositor/stream_video_node.cpp new file mode 100644 index 000000000..29922f866 --- /dev/null +++ b/src/core/compositor/stream_video_node.cpp @@ -0,0 +1,169 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://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 https://www.qt.io/terms-conditions. For further +** information use the contact form at https://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.LGPL3 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-3.0.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 (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "stream_video_node.h" + +#include <QtQuick/qsgtexture.h> + +namespace QtWebEngineCore { + +class StreamVideoMaterialShader : public QSGMaterialShader +{ +public: + StreamVideoMaterialShader(TextureTarget target) : m_target(target) { } + virtual void updateState(const RenderState &state, QSGMaterial *newMaterial, QSGMaterial *oldMaterial); + + char const *const *attributeNames() const override { + static const char *names[] = { + "a_position", + "a_texCoord", + 0 + }; + return names; + } + +protected: + const char *vertexShader() const override { + // Keep in sync with cc::VertexShaderVideoTransform + static 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; + } + + const char *fragmentShader() const override { + // Keep in sync with cc::FragmentShaderRGBATexAlpha + static const char *shaderExternal = + "#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" + "}"; + static const char *shader2DRect = + "#extension GL_ARB_texture_rectangle : require\n" + "varying mediump vec2 v_texCoord;\n" + "uniform sampler2DRect s_texture;\n" + "uniform lowp float alpha;\n" + "void main() {\n" + " lowp vec4 texColor = texture2DRect(s_texture, v_texCoord);\n" + " gl_FragColor = texColor * alpha;\n" + "}"; + if (m_target == ExternalTarget) + return shaderExternal; + else + return shader2DRect; + } + + 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; + TextureTarget m_target; +}; + +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, TextureTarget target) + : m_texture(texture) + , m_target(target) +{ +} + +QSGMaterialShader *StreamVideoMaterial::createShader() const +{ + return new StreamVideoMaterialShader(m_target); +} + +StreamVideoNode::StreamVideoNode(QSGTexture *texture, bool flip, TextureTarget target) + : m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4) + , m_flip(flip) +{ + setGeometry(&m_geometry); + setFlag(QSGNode::OwnsMaterial); + m_material = new StreamVideoMaterial(texture, target); + setMaterial(m_material); +} + +void StreamVideoNode::setRect(const QRectF &rect) +{ + if (m_flip) + QSGGeometry::updateTexturedRectGeometry(geometry(), rect, QRectF(0, 1, 1, -1)); + else + QSGGeometry::updateTexturedRectGeometry(geometry(), rect, QRectF(0, 0, 1, 1)); +} + +void StreamVideoNode::setTextureMatrix(const QMatrix4x4 &matrix) +{ + m_material->m_texMatrix = matrix; +} + +} // namespace |