diff options
author | Mansoor Chishtie <mchishtie@blackberry.com> | 2014-02-13 15:59:46 -0600 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-02-25 09:18:48 +0100 |
commit | e7793c99669f635ea4dab6d025a4db7a45bf718e (patch) | |
tree | 8e6fb1d4e5f42f89316b8ad6a07df952d8c05655 /src/core/stream_video_node.cpp | |
parent | c10ddd8930b06c5872499ca49213af9d9e3eb092 (diff) |
Video texture streaming support via external EGLImage textures
Created new StreamVideoNode & StreamVideoMaterial classes
for QSG renderer. These classes duplicate the logic of
chromium's direct renderer GLRenderer::DrawStreamVideoQuad.
Added support for new DrawQuad material in DelegatedFrameNode.
Added support for external textures in MailboxTexture.
Change-Id: If569b07dfef985f9833de7e64eeb3f952026bca4
Reviewed-by: Arvid Nilsson <anilsson@blackberry.com>
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
Diffstat (limited to 'src/core/stream_video_node.cpp')
-rw-r--r-- | src/core/stream_video_node.cpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/core/stream_video_node.cpp b/src/core/stream_video_node.cpp new file mode 100644 index 000000000..8f8723bd3 --- /dev/null +++ b/src/core/stream_video_node.cpp @@ -0,0 +1,138 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 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 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.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 { + static const char *names[] = { + "a_position", + "a_texCoord", + 0 + }; + return names; + } + +protected: + virtual const char *vertexShader() const { + // 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" + "varying mediump vec2 v_texCoord;\n" + "void main() {\n" + " gl_Position = matrix * a_position;\n" + " v_texCoord = a_texCoord;\n" + "}"; + return shader; + } + + virtual const char *fragmentShader() const { + // Keep in sync with cc::FragmentShaderOESImageExternal + static const char *shader = + "#extension GL_OES_EGL_image_external : require\n" + "varying mediump vec2 v_texCoord;\n" + "uniform samplerExternalOES s_texture;\n" + "void main() {\n" + " vec4 texColor = texture2D(s_texture, v_texCoord);\n" + " gl_FragColor = texColor;\n" + "}"; + return shader; + } + + virtual void initialize() { + m_id_matrix = program()->uniformLocation("matrix"); + m_id_sTexture = program()->uniformLocation("s_texture"); + } + + int m_id_matrix; + int m_id_sTexture; +}; + +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(); + + // TODO(mchishtie): handle state.opacity() when shader implements it + if (state.isMatrixDirty()) + program()->setUniformValue(m_id_matrix, state.combinedMatrix()); +} + +StreamVideoMaterial::StreamVideoMaterial(QSGTexture *texture) + : m_texture(texture) +{ +} + +QSGMaterialShader *StreamVideoMaterial::createShader() const +{ + return new StreamVideoMaterialShader; +} + +int StreamVideoMaterial::compare(const QSGMaterial *other) const +{ + const StreamVideoMaterial *m = static_cast<const StreamVideoMaterial *>(other); + return (m_texture->textureId() - m->m_texture->textureId()); +} + +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)); +} |