diff options
Diffstat (limited to 'src/quick/scenegraph/coreapi/qsggeometry.cpp')
| -rw-r--r-- | src/quick/scenegraph/coreapi/qsggeometry.cpp | 170 |
1 files changed, 131 insertions, 39 deletions
diff --git a/src/quick/scenegraph/coreapi/qsggeometry.cpp b/src/quick/scenegraph/coreapi/qsggeometry.cpp index 5012f6a31b..b43a2bc2ba 100644 --- a/src/quick/scenegraph/coreapi/qsggeometry.cpp +++ b/src/quick/scenegraph/coreapi/qsggeometry.cpp @@ -39,10 +39,11 @@ #include "qsggeometry.h" #include "qsggeometry_p.h" - -#include <qopenglcontext.h> -#include <qopenglfunctions.h> -#include <private/qopenglextensions_p.h> +#ifndef QT_NO_OPENGL +# include <qopenglcontext.h> +# include <qopenglfunctions.h> +# include <private/qopenglextensions_p.h> +#endif #ifdef Q_OS_QNX #include <malloc.h> @@ -53,10 +54,21 @@ QT_BEGIN_NAMESPACE QSGGeometry::Attribute QSGGeometry::Attribute::create(int attributeIndex, int tupleSize, int primitiveType, bool isPrimitive) { - Attribute a = { attributeIndex, tupleSize, primitiveType, isPrimitive, 0 }; + Attribute a = { attributeIndex, tupleSize, primitiveType, isPrimitive, UnknownAttribute, 0 }; return a; } +QSGGeometry::Attribute QSGGeometry::Attribute::createWithAttributeType(int pos, int tupleSize, int primitiveType, AttributeType attributeType) +{ + Attribute a; + a.position = pos; + a.tupleSize = tupleSize; + a.type = primitiveType; + a.isVertexCoordinate = attributeType == PositionAttribute; + a.attributeType = attributeType; + a.reserved = 0; + return a; +} /*! Convenience function which returns attributes to be used for 2D solid @@ -66,7 +78,7 @@ QSGGeometry::Attribute QSGGeometry::Attribute::create(int attributeIndex, int tu const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_Point2D() { static Attribute data[] = { - QSGGeometry::Attribute::create(0, 2, GL_FLOAT, true) + Attribute::createWithAttributeType(0, 2, FloatType, PositionAttribute) }; static AttributeSet attrs = { 1, sizeof(float) * 2, data }; return attrs; @@ -79,8 +91,8 @@ const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_Point2D() const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_TexturedPoint2D() { static Attribute data[] = { - QSGGeometry::Attribute::create(0, 2, GL_FLOAT, true), - QSGGeometry::Attribute::create(1, 2, GL_FLOAT) + Attribute::createWithAttributeType(0, 2, FloatType, PositionAttribute), + Attribute::createWithAttributeType(1, 2, FloatType, TexCoordAttribute) }; static AttributeSet attrs = { 2, sizeof(float) * 4, data }; return attrs; @@ -93,8 +105,8 @@ const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_TexturedPoint2D( const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_ColoredPoint2D() { static Attribute data[] = { - QSGGeometry::Attribute::create(0, 2, GL_FLOAT, true), - QSGGeometry::Attribute::create(1, 4, GL_UNSIGNED_BYTE) + Attribute::createWithAttributeType(0, 2, FloatType, PositionAttribute), + Attribute::createWithAttributeType(1, 4, UnsignedByteType, ColorAttribute) }; static AttributeSet attrs = { 2, 2 * sizeof(float) + 4 * sizeof(char), data }; return attrs; @@ -122,12 +134,31 @@ const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_ColoredPoint2D() \fn QSGGeometry::Attribute QSGGeometry::Attribute::create(int pos, int tupleSize, int primitiveType, bool isPosition) Creates a new QSGGeometry::Attribute for attribute register \a pos with \a - tupleSize. The \a primitiveType can be any of the supported OpenGL types, - such as \c GL_FLOAT or \c GL_UNSIGNED_BYTE. + tupleSize. The \a primitiveType can be any of the supported types from + QSGGeometry::Type, such as QSGGeometry::FloatType or + QSGGeometry::UnsignedByteType. - If the attribute describes the position for the vertex, the \a isPosition hint - should be set to \c true. The scene graph renderer may use this information - to perform optimizations. + If the attribute describes the position for the vertex, the \a isPosition + hint should be set to \c true. The scene graph renderer may use this + information to perform optimizations. + + \note Scene graph backends for APIs other than OpenGL may require an + accurate description of attributes' usage, and therefore it is recommended + to use createWithAttributeType() instead. + + Use the create function to construct the attribute, rather than an + initialization list, to ensure that all fields are initialized. + */ + +/*! + \fn QSGGeometry::Attribute QSGGeometry::Attribute::createWithAttributeType(int pos, int tupleSize, int primitiveType, AttributeType attributeType) + + Creates a new QSGGeometry::Attribute for attribute register \a pos with \a + tupleSize. The \a primitiveType can be any of the supported types from + QSGGeometry::Type, such as QSGGeometry::FloatType or + QSGGeometry::UnsignedByteType. + + \a attributeType describes the intended use of the attribute. Use the create function to construct the attribute, rather than an initialization list, to ensure that all fields are initialized. @@ -206,9 +237,9 @@ const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_ColoredPoint2D() The QSGGeometry class stores the geometry of the primitives rendered with the scene graph. It contains vertex data and optionally index data. The mode used to draw the geometry is - specified with setDrawingMode(), which maps directly to the OpenGL + specified with setDrawingMode(), which maps directly to the graphics API's drawing mode, such as \c GL_TRIANGLE_STRIP, \c GL_TRIANGLES, or - \c GL_POINTS. + \c GL_POINTS in case of OpenGL. Vertices can be as simple as points defined by x and y values or can be more complex where each vertex contains a normal, texture @@ -394,7 +425,7 @@ QSGGeometry::QSGGeometry(const QSGGeometry::AttributeSet &attributes, int vertexCount, int indexCount, int indexType) - : m_drawing_mode(GL_TRIANGLE_STRIP) + : m_drawing_mode(DrawTriangleStrip) , m_vertex_count(0) , m_index_count(0) , m_index_type(indexType) @@ -410,21 +441,20 @@ QSGGeometry::QSGGeometry(const QSGGeometry::AttributeSet &attributes, Q_UNUSED(m_reserved_bits); Q_ASSERT(m_attributes.count > 0); Q_ASSERT(m_attributes.stride > 0); - +#ifndef QT_NO_OPENGL Q_ASSERT_X(indexType != GL_UNSIGNED_INT || static_cast<QOpenGLExtensions *>(QOpenGLContext::currentContext()->functions()) ->hasOpenGLExtension(QOpenGLExtensions::ElementIndexUint), "QSGGeometry::QSGGeometry", "GL_UNSIGNED_INT is not supported, geometry will not render" ); - - if (indexType != GL_UNSIGNED_BYTE - && indexType != GL_UNSIGNED_SHORT - && indexType != GL_UNSIGNED_INT) { +#endif + if (indexType != UnsignedByteType + && indexType != UnsignedShortType + && indexType != UnsignedIntType) { qFatal("QSGGeometry: Unsupported index type, %x.\n", indexType); } - // Because allocate reads m_vertex_count, m_index_count and m_owns_data, these // need to be set before calling allocate... allocate(vertexCount, indexCount); @@ -516,23 +546,63 @@ const void *QSGGeometry::indexData() const } /*! + \enum QSGGeometry::DrawingMode + + The values correspond to OpenGL enum values like \c GL_POINTS, \c GL_LINES, + etc. QSGGeometry provies its own type in order to be able to provide the + same API with non-OpenGL backends as well. + + \value DrawPoints + \value DrawLines + \value DrawLineLoop + \value DrawLineStrip + \value DrawTriangles + \value DrawTriangleStrip + \value DrawTriangleFan + */ + +/*! + \enum QSGGeometry::Type + + The values correspond to OpenGL type constants like \c GL_BYTE, \c + GL_UNSIGNED_BYTE, etc. QSGGeometry provies its own type in order to be able + to provide the same API with non-OpenGL backends as well. + + \value ByteType + \value UnsignedByteType + \value ShortType + \value UnsignedShortType + \value IntType + \value UnsignedIntType + \value FloatType + */ + +/*! Sets the \a mode to be used for drawing this geometry. - The default value is \c GL_TRIANGLE_STRIP. + The default value is QSGGeometry::DrawTriangleStrip. + + \sa DrawingMode */ -void QSGGeometry::setDrawingMode(GLenum mode) +void QSGGeometry::setDrawingMode(unsigned int mode) { m_drawing_mode = mode; } /*! - Gets the current line or point width or to be used for this geometry. This property - only applies to line width when the drawingMode is \c GL_LINES, \c GL_LINE_STRIP, or - \c GL_LINE_LOOP. For desktop OpenGL, it also applies to point size when the drawingMode - is \c GL_POINTS. + Gets the current line or point width or to be used for this geometry. This + property only applies to line width when the drawingMode is DrawLines, + DarwLineStrip, or DrawLineLoop. For desktop OpenGL, it also applies to + point size when the drawingMode is DrawPoints. The default value is \c 1.0 + \note When not using OpenGL, support for point and line drawing may be + limited. For example, some APIs do not support point sprites and so setting + a size other than 1 is not possible. Some backends may be able implement + support via geometry shaders, but this is not guaranteed to be always + available. + \sa setLineWidth(), drawingMode() */ float QSGGeometry::lineWidth() const @@ -541,14 +611,15 @@ float QSGGeometry::lineWidth() const } /*! - Sets the line or point width to be used for this geometry to \a width. This property - only applies to line width when the drawingMode is \c GL_LINES, \c GL_LINE_STRIP, or - \c GL_LINE_LOOP. For Desktop OpenGL, it also applies to point size when the drawingMode - is \c GL_POINTS. + Sets the line or point width to be used for this geometry to \a width. This + property only applies to line width when the drawingMode is DrawLines, + DrawLineStrip, or DrawLineLoop. For Desktop OpenGL, it also applies to + point size when the drawingMode is DrawPoints. - \note How line width and point size are treated is implementation dependent: The application - should not rely on these, but rather create triangles or similar to draw areas. On OpenGL ES, - line width support is limited and point size is unsupported. + \note How line width and point size are treated is implementation + dependent: The application should not rely on these, but rather create + triangles or similar to draw areas. On OpenGL ES, line width support is + limited and point size is unsupported. \sa lineWidth(), drawingMode() */ @@ -601,8 +672,8 @@ void QSGGeometry::allocate(int vertexCount, int indexCount) m_index_data_offset = -1; m_owns_data = false; } else { - Q_ASSERT(m_index_type == GL_UNSIGNED_INT || m_index_type == GL_UNSIGNED_SHORT); - int indexByteSize = indexCount * (m_index_type == GL_UNSIGNED_SHORT ? sizeof(quint16) : sizeof(quint32)); + Q_ASSERT(m_index_type == UnsignedIntType || m_index_type == UnsignedShortType); + int indexByteSize = indexCount * (m_index_type == UnsignedShortType ? sizeof(quint16) : sizeof(quint32)); m_data = (void *) malloc(vertexByteSize + indexByteSize); m_index_data_offset = vertexByteSize; m_owns_data = true; @@ -674,6 +745,27 @@ void QSGGeometry::updateTexturedRectGeometry(QSGGeometry *g, const QRectF &rect, v[3].ty = textureRect.bottom(); } +/*! + Updates the geometry \a g with the coordinates in \a rect. + + The function assumes the geometry object contains a single triangle strip + of QSGGeometry::ColoredPoint2D vertices + */ +void QSGGeometry::updateColoredRectGeometry(QSGGeometry *g, const QRectF &rect) +{ + ColoredPoint2D *v = g->vertexDataAsColoredPoint2D(); + v[0].x = rect.left(); + v[0].y = rect.top(); + + v[1].x = rect.left(); + v[1].y = rect.bottom(); + + v[2].x = rect.right(); + v[2].y = rect.top(); + + v[3].x = rect.right(); + v[3].y = rect.bottom(); +} /*! |