diff options
| author | Allan Sandfeld Jensen <allan.jensen@digia.com> | 2014-01-29 11:41:31 +0100 |
|---|---|---|
| committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-02-10 12:49:06 +0100 |
| commit | a7b8ef08415b8056661c3db5950842ee546891b9 (patch) | |
| tree | f010dbec1421980535be48705b51b7c62d079a16 /src/gui/image/qimage.cpp | |
| parent | 143d591aab7a2d244913e9d13f079de05eb7a65c (diff) | |
Export optimized premultiply and unpremultiply methods
This patch optimizes the unpremultiply method further by using a
lookup table to avoid any divisions at all.
The opportunity is taken to export both premultiply and unpremultiply
since they are commonly used methods relevant to the exported QRgb type
that can be both premultiplied and unpremultipled ARGB.
[ChangeLog][QtGui][QColor] Exported highly optimized methods for
premultiply and unpremultiply of QRgb values.
Change-Id: I658bcf57b0bc73c34c1765b64617d43b63ae820b
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
Diffstat (limited to 'src/gui/image/qimage.cpp')
| -rw-r--r-- | src/gui/image/qimage.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index f549a04dfb..48c262ae7a 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -1719,7 +1719,7 @@ void QImage::fill(const QColor &color) if (d->depth == 32) { uint pixel = color.rgba(); if (d->format == QImage::Format_ARGB32_Premultiplied || d->format == QImage::Format_RGBA8888_Premultiplied) - pixel = PREMUL(pixel); + pixel = qPremultiply(pixel); fill((uint) pixel); } else if (d->format == QImage::Format_RGB16) { @@ -2204,17 +2204,17 @@ void QImage::setPixel(int x, int y, uint index_or_rgb) case Format_RGB32: //make sure alpha is 255, we depend on it in qdrawhelper for cases // when image is set as a texture pattern on a qbrush - ((uint *)s)[x] = uint(255 << 24) | index_or_rgb; + ((uint *)s)[x] = 0xff000000 | index_or_rgb; return; case Format_ARGB32: case Format_ARGB32_Premultiplied: ((uint *)s)[x] = index_or_rgb; return; case Format_RGB16: - ((quint16 *)s)[x] = qConvertRgb32To16(INV_PREMUL(index_or_rgb)); + ((quint16 *)s)[x] = qConvertRgb32To16(qUnpremultiply(index_or_rgb)); return; case Format_RGBX8888: - ((uint *)s)[x] = ARGB2RGBA(index_or_rgb | 0xff000000); + ((uint *)s)[x] = ARGB2RGBA(0xff000000 | index_or_rgb); return; case Format_RGBA8888: case Format_RGBA8888_Premultiplied: |