diff options
Diffstat (limited to 'src/declarative/scenegraph/coreapi/renderer.cpp')
| -rw-r--r-- | src/declarative/scenegraph/coreapi/renderer.cpp | 548 |
1 files changed, 0 insertions, 548 deletions
diff --git a/src/declarative/scenegraph/coreapi/renderer.cpp b/src/declarative/scenegraph/coreapi/renderer.cpp deleted file mode 100644 index a1da799ba5..0000000000 --- a/src/declarative/scenegraph/coreapi/renderer.cpp +++ /dev/null @@ -1,548 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** 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, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "renderer.h" -#include "node.h" -#include "material.h" -#include "nodeupdater_p.h" - -#include "adaptationlayer.h" - -#include <QGLShaderProgram> -#include <qglframebufferobject.h> -#include <QtGui/qapplication.h> - -#include <qdatetime.h> - -QT_BEGIN_NAMESPACE - -//#define RENDERER_DEBUG -//#define QT_GL_NO_SCISSOR_TEST - -// #define QSG_RENDERER_TIMING -#ifdef QSG_RENDERER_TIMING -static QTime frameTimer; -static int preprocessTime; -static int updatePassTime; -static int frameNumber = 0; -#endif - -void Bindable::clear() const -{ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); -} - -// Reactivate the color buffer after switching to the stencil. -void Bindable::reactivate() const -{ - glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); -} - -BindableFbo::BindableFbo(QGLContext *ctx, QGLFramebufferObject *fbo) : m_ctx(ctx), m_fbo(fbo) -{ -} - - -void BindableFbo::bind() const -{ - m_fbo->bind(); -} - -/*! - \class Renderer - \brief The renderer class is the abstract baseclass use for rendering the - QML scene graph. - - The renderer is not tied to any particular surface. It expects a context to - be current and will render into that surface according to how the device rect, - viewport rect and projection transformation are set up. - - Rendering is a sequence of steps initiated by calling renderScene(). This will - effectively draw the scene graph starting at the root node. The Node::preprocess() - function will be called for all the nodes in the graph, followed by an update - pass which updates all matrices, opacity, clip states and similar in the graph. - Because the update pass is called after preprocess, it is safe to modify the graph - during preprocess. To run a custom update pass over the graph, install a custom - NodeUpdater using setNodeUpdater(). Once all the graphs dirty states are updated, - the virtual render() function is called. - - The render() function is implemented by Renderer subclasses to render the graph - in the most optimal way for a given hardware. - - The renderer can make use of stencil, depth and color buffers in addition to the - scissor rect. - - \internal - */ - - -Renderer::Renderer() - : QObject() - , m_clear_color(Qt::transparent) - , m_root_node(0) - , m_node_updater(0) - , m_changed_emitted(false) - , m_mirrored(false) - , m_is_rendering(false) - , m_bindable(0) -{ - Q_ASSERT(QGLContext::currentContext()); - initializeGLFunctions(); -} - - -Renderer::~Renderer() -{ - setRootNode(0); - delete m_node_updater; -} - - -/*! - Returns the node updater that this renderer uses to update states in the - scene graph. - - If no updater is specified a default one is constructed. - */ - -NodeUpdater *Renderer::nodeUpdater() const -{ - if (!m_node_updater) - const_cast<Renderer *>(this)->m_node_updater = new NodeUpdater(); - return m_node_updater; -} - - -/*! - Sets the node updater that this renderer uses to update states in the - scene graph. - - This will delete and override any existing node updater - */ -void Renderer::setNodeUpdater(NodeUpdater *updater) -{ - if (m_node_updater) - delete m_node_updater; - m_node_updater = updater; -} - - -void Renderer::setRootNode(RootNode *node) -{ - if (m_root_node == node) - return; - if (m_root_node) { - m_root_node->m_renderers.removeOne(this); - nodeChanged(m_root_node, Node::DirtyNodeRemoved); - } - m_root_node = node; - if (m_root_node) { - Q_ASSERT(!m_root_node->m_renderers.contains(this)); - m_root_node->m_renderers << this; - nodeChanged(m_root_node, Node::DirtyNodeAdded); - } -} - - -void Renderer::renderScene() -{ - class B : public Bindable - { - public: - B() : m_ctx(const_cast<QGLContext *>(QGLContext::currentContext())) { } - void bind() const { QGLFramebufferObject::bindDefault(); } - private: - QGLContext *m_ctx; - } b; - renderScene(b); -} - -void Renderer::renderScene(const Bindable &bindable) -{ - if (!m_root_node) - return; - - m_is_rendering = true; -#ifdef QSG_RENDERER_TIMING - frameTimer.start(); -#endif - - m_bindable = &bindable; - preprocess(); - - bindable.bind(); -#ifdef QSG_RENDERER_TIMING - int bindTime = frameTimer.elapsed(); -#endif - - render(); -#ifdef QSG_RENDERER_TIMING - int renderTime = frameTimer.elapsed(); -#endif - - glDisable(GL_SCISSOR_TEST); - m_is_rendering = false; - m_changed_emitted = false; - m_bindable = 0; - -#ifdef QSG_RENDERER_TIMING - printf("Frame #%d: Breakdown of frametime: preprocess=%d, updates=%d, binding=%d, render=%d, total=%d\n", - ++frameNumber, - preprocessTime, - updatePassTime - preprocessTime, - bindTime - updatePassTime, - renderTime - bindTime, - renderTime); -#endif -} - -void Renderer::setProjectMatrixToDeviceRect() -{ - setProjectMatrixToRect(m_device_rect); -} - -void Renderer::setProjectMatrixToRect(const QRectF &rect) -{ - QMatrix4x4 matrix; - matrix.ortho(rect.x(), - rect.x() + rect.width(), - rect.y() + rect.height(), - rect.y(), - qreal(0.01), - -1); - setProjectMatrix(matrix); -} - -void Renderer::setProjectMatrix(const QMatrix4x4 &matrix) -{ - m_projection_matrix = matrix; - // Mirrored relative to the usual Qt coordinate system with origin in the top left corner. - m_mirrored = matrix(0, 0) * matrix(1, 1) - matrix(0, 1) * matrix(1, 0) > 0; -} - -void Renderer::setClearColor(const QColor &color) -{ - m_clear_color = color; -} - -void Renderer::setTexture(int unit, const QSGTextureRef &texture) -{ - if (unit < 0) - return; - - // Select the texture unit and bind the texture. - glActiveTexture(GL_TEXTURE0 + unit); - if (texture.isNull()) { - glBindTexture(GL_TEXTURE_2D, 0); - } else { - glBindTexture(GL_TEXTURE_2D, texture->textureId()); - } - - if (unit != 0) - glActiveTexture(GL_TEXTURE0); -} - -AbstractMaterialShader *Renderer::prepareMaterial(AbstractMaterial *material) -{ - AbstractMaterialType *type = material->type(); - AbstractMaterialShader *shader = m_materials.value(type); - if (shader) - return shader; - - shader = material->createShader(); - m_materials[type] = shader; - return shader; -} - -void Renderer::nodeChanged(Node *node, Node::DirtyFlags flags) -{ - Q_UNUSED(node); - Q_UNUSED(flags); - - if (flags & Node::DirtyNodeAdded) - addNodesToPreprocess(node); - if (flags & Node::DirtyNodeRemoved) - removeNodesToPreprocess(node); - - if (!m_changed_emitted && !m_is_rendering) { - // Premature overoptimization to avoid excessive signal emissions - m_changed_emitted = true; - emit sceneGraphChanged(); - } -} - -void Renderer::materialChanged(GeometryNode *, AbstractMaterial *, AbstractMaterial *) -{ -} - -void Renderer::preprocess() -{ - Q_ASSERT(m_root_node); - - for (QSet<Node *>::const_iterator it = m_nodes_to_preprocess.constBegin(); - it != m_nodes_to_preprocess.constEnd(); ++it) { - Node *n = *it; - if (!nodeUpdater()->isNodeBlocked(n, m_root_node)) { - n->preprocess(); - } - } - -#ifdef QSG_RENDERER_TIMING - preprocessTime = frameTimer.elapsed(); -#endif - - nodeUpdater()->updateStates(m_root_node); - -#ifdef QSG_RENDERER_TIMING - updatePassTime = frameTimer.elapsed(); -#endif - -} - -void Renderer::addNodesToPreprocess(Node *node) -{ - for (int i = 0; i < node->childCount(); ++i) - addNodesToPreprocess(node->childAtIndex(i)); - if (node->flags() & Node::UsePreprocess) - m_nodes_to_preprocess.insert(node); -} - -void Renderer::removeNodesToPreprocess(Node *node) -{ - for (int i = 0; i < node->childCount(); ++i) - removeNodesToPreprocess(node->childAtIndex(i)); - if (node->flags() & Node::UsePreprocess) - m_nodes_to_preprocess.remove(node); -} - - -/*! - Convenience function to set up the stencil buffer for clipping based on \a clip. - - If the clip is a pixel aligned rectangle, this function will use glScissor instead - of stencil. - */ - -Renderer::ClipType Renderer::updateStencilClip(const ClipNode *clip) -{ - if (!clip) { - glDisable(GL_STENCIL_TEST); - glDisable(GL_SCISSOR_TEST); - return NoClip; - } - - bool stencilEnabled = false; - bool scissorEnabled = false; - - glDisable(GL_SCISSOR_TEST); - - int clipDepth = 0; - QRect clipRect; - while (clip) { - QMatrix4x4 matrix = m_projectionMatrix.top(); - if (clip->matrix()) - matrix *= *clip->matrix(); - - const QMatrix4x4 &m = matrix; - - // TODO: Check for multisampling and pixel grid alignment. - bool canUseScissor = clip->isRectangular() - && qFuzzyIsNull(m(0, 1)) && qFuzzyIsNull(m(0, 2)) - && qFuzzyIsNull(m(1, 0)) && qFuzzyIsNull(m(1, 2)); - - if (canUseScissor) { - QRectF bbox = clip->clipRect(); - qreal invW = 1 / m(3, 3); - qreal fx1 = (bbox.left() * m(0, 0) + m(0, 3)) * invW; - qreal fy1 = (bbox.bottom() * m(1, 1) + m(1, 3)) * invW; - qreal fx2 = (bbox.right() * m(0, 0) + m(0, 3)) * invW; - qreal fy2 = (bbox.top() * m(1, 1) + m(1, 3)) * invW; - - GLint ix1 = qRound((fx1 + 1) * m_device_rect.width() * qreal(0.5)); - GLint iy1 = qRound((fy1 + 1) * m_device_rect.height() * qreal(0.5)); - GLint ix2 = qRound((fx2 + 1) * m_device_rect.width() * qreal(0.5)); - GLint iy2 = qRound((fy2 + 1) * m_device_rect.height() * qreal(0.5)); - - if (!scissorEnabled) { - clipRect = QRect(ix1, iy1, ix2 - ix1, iy2 - iy1); - glEnable(GL_SCISSOR_TEST); - scissorEnabled = true; - } else { - clipRect &= QRect(ix1, iy1, ix2 - ix1, iy2 - iy1); - } - - clipRect = clipRect.normalized(); - glScissor(clipRect.x(), clipRect.y(), clipRect.width(), clipRect.height()); - } else { - if (!stencilEnabled) { - if (!m_clip_program.isLinked()) { - m_clip_program.addShaderFromSourceCode(QGLShader::Vertex, - "attribute highp vec4 vCoord; \n" - "uniform highp mat4 matrix; \n" - "void main() { \n" - " gl_Position = matrix * vCoord; \n" - "}"); - m_clip_program.addShaderFromSourceCode(QGLShader::Fragment, - "void main() { \n" - " gl_FragColor = vec4(0.81, 0.83, 0.12, 1.0); \n" // Trolltech green ftw! - "}"); - m_clip_program.bindAttributeLocation("vCoord", 0); - m_clip_program.link(); - m_clip_matrix_id = m_clip_program.uniformLocation("matrix"); - } - - glStencilMask(0xff); // write mask - glClearStencil(0); - glClear(GL_STENCIL_BUFFER_BIT); - glEnable(GL_STENCIL_TEST); - glDisable(GL_DEPTH_TEST); - glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); - glDepthMask(GL_FALSE); - - m_clip_program.bind(); - m_clip_program.enableAttributeArray(0); - - stencilEnabled = true; - } - - glStencilFunc(GL_EQUAL, clipDepth, 0xff); // stencil test, ref, test mask - glStencilOp(GL_KEEP, GL_KEEP, GL_INCR); // stencil fail, z fail, z pass - - const QSGGeometry *geometry = clip->geometry(); - Q_ASSERT(geometry->attributeCount() > 0); - const QSGGeometry::Attribute *a = geometry->attributes(); - - glVertexAttribPointer(0, a->tupleSize, a->type, GL_FALSE, geometry->stride(), geometry->vertexData()); - - m_clip_program.setUniformValue(m_clip_matrix_id, m); - draw(clip); - - ++clipDepth; - } - - clip = clip->clipList(); - } - - if (stencilEnabled) { - m_clip_program.disableAttributeArray(0); - glEnable(GL_DEPTH_TEST); - glStencilFunc(GL_EQUAL, clipDepth, 0xff); // stencil test, ref, test mask - glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); // stencil fail, z fail, z pass - glStencilMask(0); // write mask - bindable()->reactivate(); - //glDepthMask(GL_TRUE); // must be reset correctly by caller. - } else { - glDisable(GL_STENCIL_TEST); - } - - if (!scissorEnabled) - glDisable(GL_SCISSOR_TEST); - - return stencilEnabled ? StencilClip : ScissorClip; -} - - -/*! - Issues the GL draw call for \a geometryNode. - - The function assumes that attributes have been bound and set up prior - to making this call. - - \internal - */ - -void Renderer::draw(const BasicGeometryNode *node) -{ - const QSGGeometry *g = node->geometry(); - if (g->indexCount()) { - glDrawElements(g->drawingMode(), g->indexCount(), g->indexType(), g->indexData()); - } else { - glDrawArrays(g->drawingMode(), 0, g->vertexCount()); - } -} - - -static inline int size_of_type(GLenum type) -{ - static int sizes[] = { - sizeof(char), - sizeof(unsigned char), - sizeof(short), - sizeof(unsigned short), - sizeof(int), - sizeof(unsigned int), - sizeof(float), - 2, - 3, - 4, - sizeof(double) - }; - return sizes[type - GL_BYTE]; -} - -/*! - Convenience function to set up and bind the vertex data in \a g to the - required attribute positions defined in \a material. - - \internal - */ - -void Renderer::bindGeometry(AbstractMaterialShader *material, const QSGGeometry *g) -{ - char const *const *attrNames = material->attributeNames(); - int offset = 0; - for (int j = 0; attrNames[j]; ++j) { - if (!*attrNames[j]) - continue; - Q_ASSERT_X(j < g->attributeCount(), "Renderer::bindGeometry()", "Geometry lacks attribute required by material"); - const QSGGeometry::Attribute &a = g->attributes()[j]; - Q_ASSERT_X(j == a.position, "Renderer::bindGeometry()", "Geometry does not have continous attribute positions"); -#if defined(QT_OPENGL_ES_2) - GLboolean normalize = a.type != GL_FLOAT; -#else - GLboolean normalize = a.type != GL_FLOAT && a.type != GL_DOUBLE; -#endif - glVertexAttribPointer(a.position, a.tupleSize, a.type, normalize, g->stride(), (char *) g->vertexData() + offset); - offset += a.tupleSize * size_of_type(a.type); - } -} - -QT_END_NAMESPACE |