AuroraMiddleware/qt5base-lts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Make drawing to and from RGBA8888 images faster

Browse Source 
After profiling drawing with RGBA8888 images most of the time appears
to be spend in converting to and from ARGB32PM.

This patch adds four small converters that are 3-4 times faster than the
generic converter.

Change-Id: I3c7498756f440ca3ea9c1417b26dd8e1953b9d06
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
This commit is contained in:
Allan Sandfeld Jensen 2013-11-13 14:07:53 +01:00 committed by The Qt Project
parent 5dd94b75e3
commit 34ff885bff
1 changed files with 38 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
src/gui/painting/qdrawhelper.cpp
View File

@ -118,6 +118,22 @@ static const uint *QT_FASTCALL convertARGB32ToARGB32PM(uint *buffer, const uint
return buffer;
}
static const uint *QT_FASTCALL convertRGBA8888PMToARGB32PM(uint *buffer, const uint *src, int count,
const QPixelLayout *, const QRgb *)
{
for (int i = 0; i < count; ++i)
buffer[i] = RGBA2ARGB(src[i]);
return buffer;
}
static const uint *QT_FASTCALL convertRGBA8888ToARGB32PM(uint *buffer, const uint *src, int count,
const QPixelLayout *, const QRgb *)
{
for (int i = 0; i < count; ++i)
buffer[i] = PREMUL(RGBA2ARGB(src[i]));
return buffer;
}
static const uint *QT_FASTCALL convertToRGB32(uint *buffer, const uint *src, int count,
const QPixelLayout *layout, const QRgb *)
{
@ -222,6 +238,22 @@ static const uint *QT_FASTCALL convertARGB32FromARGB32PM(uint *buffer, const uin
return buffer;
}
static const uint *QT_FASTCALL convertRGBA8888PMFromARGB32PM(uint *buffer, const uint *src, int count,
const QPixelLayout *, const QRgb *)
{
for (int i = 0; i < count; ++i)
buffer[i] = ARGB2RGBA(src[i]);
return buffer;
}
static const uint *QT_FASTCALL convertRGBA8888FromARGB32PM(uint *buffer, const uint *src, int count,
const QPixelLayout *, const QRgb *)
{
for (int i = 0; i < count; ++i)
buffer[i] = ARGB2RGBA(INV_PREMUL(src[i]));
return buffer;
}
static const uint *QT_FASTCALL convertFromARGB32PM(uint *buffer, const uint *src, int count,
const QPixelLayout *layout, const QRgb *)
{
@ -415,13 +447,13 @@ QPixelLayout qPixelLayouts[QImage::NImageFormats] = {
{ 4, 8, 4, 4, 4, 0, 0, 0, false, QPixelLayout::BPP16, convertToRGB32, convertFromARGB32PM }, // Format_RGB444
{ 4, 8, 4, 4, 4, 0, 4, 12, true, QPixelLayout::BPP16, convertToARGB32PM, convertFromARGB32PM }, // Format_ARGB4444_Premultiplied
#if Q_BYTE_ORDER == Q_BIG_ENDIAN
{ 8, 24, 8, 16, 8, 8, 0, 0, false, QPixelLayout::BPP32, convertToRGB32, convertRGBFromARGB32PM }, // Format_RGBX8888
{ 8, 24, 8, 16, 8, 8, 8, 0, false, QPixelLayout::BPP32, convertToARGB32PM, convertFromARGB32PM }, // Format_RGBA8888
{ 8, 24, 8, 16, 8, 8, 8, 0, true, QPixelLayout::BPP32, convertToARGB32PM, convertFromARGB32PM }, // Format_RGBA8888_Premultiplied
{ 8, 24, 8, 16, 8, 8, 0, 0, false, QPixelLayout::BPP32, convertRGBA8888PMToARGB32PM, convertRGBFromARGB32PM }, // Format_RGBX8888
{ 8, 24, 8, 16, 8, 8, 8, 0, false, QPixelLayout::BPP32, convertRGBA8888ToARGB32PM, convertRGBA8888FromARGB32PM }, // Format_RGBA8888
{ 8, 24, 8, 16, 8, 8, 8, 0, true, QPixelLayout::BPP32, convertRGBA8888PMToARGB32PM, convertRGBA8888PMFromARGB32PM }, // Format_RGBA8888_Premultiplied
#else
{ 8, 0, 8, 8, 8, 16, 0, 24, false, QPixelLayout::BPP32, convertToRGB32, convertRGBFromARGB32PM }, // Format_RGBX8888
{ 8, 0, 8, 8, 8, 16, 8, 24, false, QPixelLayout::BPP32, convertToARGB32PM, convertFromARGB32PM }, // Format_RGBA8888 (ABGR32)
{ 8, 0, 8, 8, 8, 16, 8, 24, true, QPixelLayout::BPP32, convertToARGB32PM, convertFromARGB32PM } // Format_RGBA8888_Premultiplied
{ 8, 0, 8, 8, 8, 16, 0, 24, false, QPixelLayout::BPP32, convertRGBA8888PMToARGB32PM, convertRGBFromARGB32PM }, // Format_RGBX8888
{ 8, 0, 8, 8, 8, 16, 8, 24, false, QPixelLayout::BPP32, convertRGBA8888ToARGB32PM, convertRGBA8888FromARGB32PM }, // Format_RGBA8888 (ABGR32)
{ 8, 0, 8, 8, 8, 16, 8, 24, true, QPixelLayout::BPP32, convertRGBA8888PMToARGB32PM, convertRGBA8888PMFromARGB32PM } // Format_RGBA8888_Premultiplied
#endif
};