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Code Issues Releases Wiki Activity

Fixed upscaling cBitmaps with anti-aliasing

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This commit is contained in:
Klaus Schmidinger 2012-02-22 17:15:31 +01:00
parent a949b9c7d2
commit a3d37dfc71
3 changed files with 6 additions and 2 deletions
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1
CONTRIBUTORS
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@ -1133,6 +1133,7 @@ Rolf Ahrenberg <rahrenbe@cc.hut.fi>
for improving handling subtitles of BBC channels
for fixing handling subtitle color palettes on channels where subtitles appear
"word by word"
for reporting a problem with color palettes in subtitles
Ralf Klueber <ralf.klueber@vodafone.com>
for reporting a bug in cutting a recording if there is only a single editing mark

2
HISTORY
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@ -6906,3 +6906,5 @@ Video Disk Recorder Revision History
- Updated the Finnish OSD texts (thanks to Rolf Ahrenberg).
- Fixed handling subtitle color palettes on channels where subtitles appear
"word by word" (thanks to Rolf Ahrenberg).
- Fixed upscaling cBitmaps with anti-aliasing (thanks to Rolf Ahrenberg for reporting
a problem with color palettes in subtitles).

5
osd.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: osd.c 2.23 2011/08/15 09:27:39 kls Exp $
* $Id: osd.c 2.24 2012/02/22 16:13:04 kls Exp $
*/
#include "osd.h"
@ -812,11 +812,11 @@ cBitmap *cBitmap::Scaled(double FactorX, double FactorY, bool AntiAlias)
// Fixed point scaling code based on www.inversereality.org/files/bitmapscaling.pdf
// by deltener@mindtremors.com
cBitmap *b = new cBitmap(int(round(Width() * FactorX)), int(round(Height() * FactorY)), Bpp(), X0(), Y0());
b->Replace(*this); // copy palette
int RatioX = (Width() << 16) / b->Width();
int RatioY = (Height() << 16) / b->Height();
if (!AntiAlias || FactorX <= 1.0 && FactorY <= 1.0) {
// Downscaling - no anti-aliasing:
b->Replace(*this); // copy palette
tIndex *DestRow = b->bitmap;
int SourceY = 0;
for (int y = 0; y < b->Height(); y++) {
@ -834,6 +834,7 @@ cBitmap *cBitmap::Scaled(double FactorX, double FactorY, bool AntiAlias)
else {
// Upscaling - anti-aliasing:
b->SetBpp(8);
b->Replace(*this); // copy palette (must be done *after* SetBpp()!)
int SourceY = 0;
for (int y = 0; y < b->Height() - 1; y++) {
int SourceX = 0;