frodovdr/vdr
1
0
Fork 0
mirror of https://github.com/vdr-projects/vdr.git synced 2025-03-01 10:50:46 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fixed upscaling cBitmaps with anti-aliasing

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

5
osd.c
View File

@@ -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;