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| author | Gunnar Sletta <gunnar.sletta@jollamobile.com> | 2014-08-08 19:49:11 +0200 |
|---|---|---|
| committer | Gunnar Sletta <gunnar.sletta@jollamobile.com> | 2014-08-17 14:56:54 +0200 |
| commit | 0fadb710e5639dac9f17d6655eb9edeaadbcbc33 (patch) | |
| tree | 16774f087aa78596ba6e83418483a40528f2dd50 /src/quick/scenegraph/util/qsgvertexcolormaterial.cpp | |
| parent | 2f494803578475732dcffcd12fe5ba3b4b1c521b (diff) | |
Doc note about premultiplied alpha
Task-number: QTBUG-40677
Change-Id: I43b8cb4f3af8c62f67353197ffadf571a675eab7
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Diffstat (limited to 'src/quick/scenegraph/util/qsgvertexcolormaterial.cpp')
| -rw-r--r-- | src/quick/scenegraph/util/qsgvertexcolormaterial.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp b/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp index ef2455f702..42510e5c27 100644 --- a/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp +++ b/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp @@ -107,9 +107,12 @@ void QSGVertexColorMaterialShader::initialize() The geometry to be rendered with vertex color must have the following layout. Attribute position 0 must contain vertices. Attribute position 1 must contain colors, a tuple of 4 values with RGBA layout. Both floats in the range of 0 to 1 and unsigned bytes in - the range 0 to 255 are valid for the color values. The - QSGGeometry::defaultAttributes_ColoredPoint2D() constructs an attribute set - compatible with this material. + the range 0 to 255 are valid for the color values. + + \note The rendering pipeline expects pixels with premultiplied alpha. + + QSGGeometry::defaultAttributes_ColoredPoint2D() can be used to construct an attribute + set that is compatible with this material. The vertex color material respects both current opacity and current matrix when updating it's rendering state. |