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qsgimagenode.cpp

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1 /**************************************************************************** -

2 ** -

4 ** Contact: https://www.qt.io/licensing/ -

5 ** -

6 ** This file is part of the QtQuick module of the Qt Toolkit. -

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8 ** $QT_BEGIN_LICENSE:LGPL$ -

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17 ** GNU Lesser General Public License Usage -

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21 ** packaging of this file. Please review the following information to -

22 ** ensure the GNU Lesser General Public License version 3 requirements -

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25 ** GNU General Public License Usage -

26 ** Alternatively, this file may be used under the terms of the GNU -

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36 ** $QT_END_LICENSE$ -

37 ** -

38 ****************************************************************************/ -

39 -

40 #include "qsgimagenode.h" -

41 -

42 QT_BEGIN_NAMESPACE -

43 -

44 /*! -

45 \class QSGImageNode -

46 \brief The QSGImageNode class is provided for convenience to easily draw -

47 textured content using the QML scene graph. -

48 -

49 \inmodule QtQuick -

50 \since 5.8 -

51 -

52 \warning The image node class must have a texture before being -

53 added to the scene graph to be rendered. -

54 */ -

55 -

56 /*! -

57 \fn void QSGImageNode::setRect(const QRectF &rect) -

58 -

59 Sets the target rect of this image node to \a rect. -

60 */ -

61 -

62 /*! -

63 \fn void QSGImageNode::setRect(qreal x, qreal y, qreal w, qreal h) -

64 \overload -

65 -

66 Sets the rectangle of this image node to begin at (\a x, \a y) and have -

67 width \a w and height \a h. -

68 */ -

69 -

70 /*! -

71 \fn QRectF QSGImageNode::rect() const -

72 -

73 Returns the target rect of this image node. -

74 */ -

75 -

76 /*! -

77 \fn void QSGImageNode::setSourceRect(const QRectF &rect) -

78 -

79 Sets the source rect of this image node to \a rect. -

80 */ -

81 -

82 /*! -

83 \fn void QSGImageNode::setSourceRect(qreal x, qreal y, qreal w, qreal h) -

84 \overload -

85 -

86 Sets the rectangle of this image node to show its texture from (\a x, \a y) and -

87 have width \a w and height \a h relatively to the QSGTexture::textureSize. -

88 */ -

89 -

90 /*! -

91 \fn QRectF QSGImageNode::sourceRect() const -

92 -

93 Returns the source rect of this image node. -

94 */ -

95 -

96 /*! -

97 \fn void QSGImageNode::setTexture(QSGTexture *texture) -

98 -

99 Sets the texture of this image node to \a texture. -

100 -

101 Use setOwnsTexture() to set whether the node should take -

102 ownership of the texture. By default, the node does not -

103 take ownership. -

104 -

105 \warning An image node must have a texture before being added to the -

106 scenegraph to be rendered. -

107 */ -

108 -

109 /*! -

110 \fn QSGTexture *QSGImageNode::texture() const -

111 -

112 Returns the texture for this image node. -

113 */ -

114 -

115 /*! -

116 \fn void QSGImageNode::setFiltering(QSGTexture::Filtering filtering) -

117 -

118 Sets the filtering to be used for this image node to \a filtering. -

119 -

120 For smooth scaling, use QSGTexture::Linear. For normal scaling, use -

121 QSGTexture::Nearest. -

122 */ -

123 -

124 /*! -

125 \fn QSGTexture::Filtering QSGImageNode::filtering() const -

126 -

127 Returns the filtering for this image node. -

128 */ -

129 -

130 /*! -

131 \fn void QSGImageNode::setMipmapFiltering(QSGTexture::Filtering filtering) -

132 -

133 Sets the mipmap filtering to be used for this image node to \a filtering. -

134 -

135 For smooth scaling between mip maps, use QSGTexture::Linear. -

136 For normal scaling, use QSGTexture::Nearest. -

137 */ -

138 -

139 /*! -

140 \fn QSGTexture::Filtering QSGImageNode::mipmapFiltering() const -

141 -

142 Returns the mipmap filtering for this image node. -

143 */ -

144 -

145 /*! -

146 \enum QSGImageNode::TextureCoordinatesTransformFlag -

147 -

148 The TextureCoordinatesTransformFlag enum is used to specify the mode used -

149 to generate texture coordinates for a textured quad. -

150 -

151 \value NoTransform Texture coordinates are oriented with window coordinates -

152 i.e. with origin at top-left. -

153 -

154 \value MirrorHorizontally Texture coordinates are inverted in the horizontal axis with -

155 respect to window coordinates -

156 -

157 \value MirrorVertically Texture coordinates are inverted in the vertical axis with -

158 respect to window coordinates -

159 */ -

160 -

161 /*! -

162 \fn void QSGImageNode::setTextureCoordinatesTransform(TextureCoordinatesTransformMode mode) -

163 -

164 Sets the method used to generate texture coordinates to \a mode. This can -

165 be used to obtain correct orientation of the texture. This is commonly -

166 needed when using a third-party OpenGL library to render to texture as -

167 OpenGL has an inverted y-axis relative to Qt Quick. -

168 */ -

169 -

170 /*! -

171 \fn QSGImageNode::TextureCoordinatesTransformMode QSGImageNode::textureCoordinatesTransform() const -

172 -

173 Returns the mode used to generate texture coordinates for this node. -

174 */ -

175 -

176 /*! -

177 \fn void QSGImageNode::setOwnsTexture(bool owns) -

178 -

179 Sets whether the node takes ownership of the texture to \a owns. -

180 -

181 By default, the node does not take ownership of the texture. -

182 */ -

183 -

184 /*! -

185 \fn bool QSGImageNode::ownsTexture() const -

186 -

187 \return \c true if the node takes ownership of the texture; otherwise \c false. -

188 */ -

189 -

190 /*! -

191 Updates the geometry \a g with the \a texture, the coordinates -

192 in \a rect, and the texture coordinates from \a sourceRect. -

193 -

194 \a g is assumed to be a triangle strip of four vertices of type -

195 QSGGeometry::TexturedPoint2D. -

196 -

197 \a texCoordMode is used for normalizing the \a sourceRect. -

198 */ -

199 void QSGImageNode::rebuildGeometry(QSGGeometry *g, -

200 QSGTexture *texture, -

201 const QRectF &rect, -

202 QRectF sourceRect, -

203 TextureCoordinatesTransformMode texCoordMode) -

204 { -

205

if (!texture)

!texture	Description
TRUE	never evaluated
FALSE	never evaluated

206

return;

never executed: return;

207 -

208

if (!sourceRect.width() || !sourceRect.height()) {

!sourceRect.width()	Description
TRUE	never evaluated
FALSE	never evaluated

!sourceRect.height()	Description
TRUE	never evaluated
FALSE	never evaluated

209 QSize ts = texture->textureSize(); -

210 sourceRect = QRectF(0, 0, ts.width(), ts.height()); -

211

}

never executed: end of block

212 -

213 // Maybe transform the texture coordinates -

214

if (texCoordMode.testFlag(QSGImageNode::MirrorHorizontally)) {

texCoordMode.t...rHorizontally)	Description
TRUE	never evaluated
FALSE	never evaluated

215 float tmp = sourceRect.left(); -

216 sourceRect.setLeft(sourceRect.right()); -

217 sourceRect.setRight(tmp); -

218

}

never executed: end of block

219

if (texCoordMode.testFlag(QSGImageNode::MirrorVertically)) {

texCoordMode.t...rorVertically)	Description
TRUE	never evaluated
FALSE	never evaluated

220 float tmp = sourceRect.top(); -

221 sourceRect.setTop(sourceRect.bottom()); -

222 sourceRect.setBottom(tmp); -

223

}

never executed: end of block

224 -

225 QSGGeometry::updateTexturedRectGeometry(g, rect, texture->convertToNormalizedSourceRect(sourceRect)); -

226

}

never executed: end of block

227 -

228 QT_END_NAMESPACE -

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