diff options
author | Konstantin Ritt <ritt.ks@gmail.com> | 2015-11-08 11:44:57 +0400 |
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committer | Konstantin Ritt <ritt.ks@gmail.com> | 2015-11-13 20:43:27 +0000 |
commit | 26e66694fad4f3ec1afba2f2c1de3c66c6d3d7ac (patch) | |
tree | e859a7400ed310a85672195e8c8ba5647b836162 /src | |
parent | c1da13f6db756a9b23c46193304156c5e10f3bc1 (diff) |
QFontEngineFT: Minor optimization to convertGRAYToARGB()
Precalculate everything we can and use faster loop.
Make inlined as it is used just in a single place.
Change-Id: If3c33d60739eb4ce896020321442ae81edd1c13d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Diffstat (limited to 'src')
-rw-r--r-- | src/gui/text/qfontengine_ft.cpp | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp index 0d28785aa1..162f409acd 100644 --- a/src/gui/text/qfontengine_ft.cpp +++ b/src/gui/text/qfontengine_ft.cpp @@ -590,13 +590,16 @@ static void convertRGBToARGB_V(const uchar *src, uint *dst, int width, int heigh } } -static void convertGRAYToARGB(const uchar *src, uint *dst, int width, int height, int src_pitch) { - for (int y = 0; y < height; ++y) { - int readpos = (y * src_pitch); - int writepos = (y * width); - for (int x = 0; x < width; ++x) { - dst[writepos + x] = (0xFF << 24) + (src[readpos + x] << 16) + (src[readpos + x] << 8) + src[readpos + x]; +static inline void convertGRAYToARGB(const uchar *src, uint *dst, int width, int height, int src_pitch) +{ + while (height--) { + const uchar *p = src; + const uchar * const e = p + width; + while (p < e) { + uchar gray = *p++; + *dst++ = (0xFF << 24) | (gray << 16) | (gray << 8) | gray; } + src += src_pitch; } } |