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Diffstat (limited to 'examples/quick/scenegraph/rendernode/openglrenderer.cpp')
| -rw-r--r-- | examples/quick/scenegraph/rendernode/openglrenderer.cpp | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/examples/quick/scenegraph/rendernode/openglrenderer.cpp b/examples/quick/scenegraph/rendernode/openglrenderer.cpp deleted file mode 100644 index a4e619bea9..0000000000 --- a/examples/quick/scenegraph/rendernode/openglrenderer.cpp +++ /dev/null @@ -1,200 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2017 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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. -** -** BSD License Usage -** Alternatively, you may use this file under the terms of the BSD license -** as follows: -** -** "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 The Qt Company Ltd 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "openglrenderer.h" -#include <QQuickItem> - -#if QT_CONFIG(opengl) - -#include <QOpenGLShaderProgram> -#include <QOpenGLBuffer> -#include <QOpenGLFunctions> - -//! [1] -OpenGLRenderNode::~OpenGLRenderNode() -{ - releaseResources(); -} - -void OpenGLRenderNode::releaseResources() -{ - delete m_program; - m_program = nullptr; - delete m_vbo; - m_vbo = nullptr; -} -//! [1] - -void OpenGLRenderNode::init() -{ - m_program = new QOpenGLShaderProgram; - - static const char *vertexShaderSource = - "attribute highp vec4 posAttr;\n" - "attribute lowp vec4 colAttr;\n" - "varying lowp vec4 col;\n" - "uniform highp mat4 matrix;\n" - "void main() {\n" - " col = colAttr;\n" - " gl_Position = matrix * posAttr;\n" - "}\n"; - - static const char *fragmentShaderSource = - "varying lowp vec4 col;\n" - "uniform lowp float opacity;\n" - "void main() {\n" - " gl_FragColor = col * opacity;\n" - "}\n"; - - m_program->addCacheableShaderFromSourceCode(QOpenGLShader::Vertex, vertexShaderSource); - m_program->addCacheableShaderFromSourceCode(QOpenGLShader::Fragment, fragmentShaderSource); - m_program->bindAttributeLocation("posAttr", 0); - m_program->bindAttributeLocation("colAttr", 1); - m_program->link(); - - m_matrixUniform = m_program->uniformLocation("matrix"); - m_opacityUniform = m_program->uniformLocation("opacity"); - - const int VERTEX_SIZE = 6 * sizeof(GLfloat); - - static GLfloat colors[] = { - 1.0f, 0.0f, 0.0f, - 0.0f, 1.0f, 0.0f, - 0.0f, 0.0f, 1.0f - }; - - m_vbo = new QOpenGLBuffer; - m_vbo->create(); - m_vbo->bind(); - m_vbo->allocate(VERTEX_SIZE + sizeof(colors)); - m_vbo->write(VERTEX_SIZE, colors, sizeof(colors)); - m_vbo->release(); -} - -//! [2] -void OpenGLRenderNode::render(const RenderState *state) -{ - if (!m_program) - init(); - - QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions(); - m_program->bind(); - m_program->setUniformValue(m_matrixUniform, *state->projectionMatrix() * *matrix()); - m_program->setUniformValue(m_opacityUniform, float(inheritedOpacity())); -//! [2] - - m_vbo->bind(); - -//! [5] - QPointF p0(m_width - 1, m_height - 1); - QPointF p1(0, 0); - QPointF p2(0, m_height - 1); - - GLfloat vertices[6] = { GLfloat(p0.x()), GLfloat(p0.y()), - GLfloat(p1.x()), GLfloat(p1.y()), - GLfloat(p2.x()), GLfloat(p2.y()) }; - m_vbo->write(0, vertices, sizeof(vertices)); -//! [5] - - m_program->setAttributeBuffer(0, GL_FLOAT, 0, 2); - m_program->setAttributeBuffer(1, GL_FLOAT, sizeof(vertices), 3); - m_program->enableAttributeArray(0); - m_program->enableAttributeArray(1); - - // We are prepared both for the legacy (direct OpenGL) and the modern - // (abstracted by RHI) OpenGL scenegraph. So set all the states that are - // important to us. - - //! [3] - f->glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); - - f->glEnable(GL_BLEND); - f->glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); - - // Clip support. - if (state->scissorEnabled()) { - f->glEnable(GL_SCISSOR_TEST); - const QRect r = state->scissorRect(); // already bottom-up - f->glScissor(r.x(), r.y(), r.width(), r.height()); - } - if (state->stencilEnabled()) { - f->glEnable(GL_STENCIL_TEST); - f->glStencilFunc(GL_EQUAL, state->stencilValue(), 0xFF); - f->glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); - } - - f->glDrawArrays(GL_TRIANGLES, 0, 3); - //! [3] -} - -//! [4] -QSGRenderNode::StateFlags OpenGLRenderNode::changedStates() const -{ - return BlendState | ScissorState | StencilState; -} - -QSGRenderNode::RenderingFlags OpenGLRenderNode::flags() const -{ - return BoundedRectRendering | DepthAwareRendering; -} - -QRectF OpenGLRenderNode::rect() const -{ - return QRect(0, 0, m_width, m_height); -} -//! [4] - -void OpenGLRenderNode::sync(QQuickItem *item) -{ - m_width = item->width(); - m_height = item->height(); -} - -#endif // opengl |