notgne2/tuxpaint-pencil-sharpener
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Got hq4x to semi-usable state.

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This commit is contained in:
William Kendrick 2003-12-21 01:01:50 +00:00
parent 8dee572c9d
commit 8ab8165e6b
4 changed files with 20 additions and 18 deletions
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2
src/hq4x.c
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@ -178,9 +178,9 @@ void hq4x_32(SDL_Surface * src, SDL_Surface * dest,
int prevline, nextline;
Uint16 w[10];
Uint8 a;
Uint32 YUV1, YUV2;
int pattern;
int flag;
Uint32 YUV1, YUV2;
/*

10
src/hqxx.c
View file

@ -181,7 +181,9 @@ void InitLUTs(Uint32 * RGBtoYUV)
Y = (r + g + b) >> 2;
u = 128 + ((r - b) >> 2);
v = 128 + ((-r + 2 * g - b) >> 3);
RGBtoYUV[(i << 11) + (j << 5) + k] = (Y << 16) + (u << 8) + v;
RGBtoYUV[(i << 11) + (j << 5) + k] = (((Y & 0xF8) << 8) |
((u & 0xFE) << 3) |
(v >> 3));
}
}
}
@ -208,11 +210,15 @@ inline void Interp2(SDL_Surface * dest, int x, int y, Uint16 c1, Uint16 c2, Uint
{
Uint32 c;
/* FIXME? */
// c = (c1 * 2 + c2 + c3) >> 2;
c = ((((c1 & 0x07E0) * 2 + (c2 & 0x07E0) + (c3 & 0x07E0)) & (0x07E0 << 2)) +
(((c1 & 0xF81F) * 2 + (c2 & 0xF81F) + (c3 & 0xF81F)) & (0xF81F << 2)))
>> 2;
hqxx_putpixel(dest, x, y, c, alpha);
}
@ -246,7 +252,7 @@ inline void Interp4(SDL_Surface * dest, int x, int y, Uint16 c1, Uint16 c2, Uint
c = ((((c1 & 0x07E0) * 2 +
((c2 & 0x07E0) +
(c3 & 0x07E0)) * 7) & 0x07E00) +
(c3 & 0x07E0)) * 7) & 0x7E00) +
(((c1 & 0xF81F) * 2 +
((c2 & 0xF81F) +
(c3 & 0xF81F)) * 7) & 0xF81F0)) >> 4;

22
src/hqxx.h
View file

@ -27,21 +27,17 @@
#include "SDL.h"
#define Ymask 0x00FF0000
#define Umask 0x0000FF00
#define Vmask 0x000000FF
#define Ymask 0xF800
#define Umask 0x07E0
#define Vmask 0x001F
//#define Ymask 0xF800
//#define Umask 0x07E0
//#define Vmask 0x001F
//trY in 32 = 0x00300000
//trU in 32 = 0x00000700
//trV in 32 = 0x00000006
#define trY 0x00300000
#define trU 0x00000700
#define trV 0x00000006
//#define trY 0x3000
//#define trU 0x00C0
//#define trV 0x0006
#define trY 0x3000
#define trU 0x00C0
#define trV 0x0006
Uint16 hqxx_getpixel(SDL_Surface * surface, int x, int y, Uint8 * alpha);

4
src/tuxpaint.c
View file

@ -38,7 +38,7 @@
/* #define USE_HWSURFACE */
/* #define USE_HQ4X */
#define USE_HQ4X
/* Disable fancy cursors in fullscreen mode, to avoid SDL bug: */
@ -3007,7 +3007,7 @@ void stamp_draw(int x, int y)
/* Shrink or grow it! */
#ifdef HQ4X
#ifdef USE_HQ4X
if (state_stamps[cur_stamp]->size == 400)
{
/* Use high quality 4x filter! */