mirror of
https://github.com/dborth/vbagx.git
synced 2024-11-29 14:04:16 +01:00
151 lines
4.1 KiB
C++
151 lines
4.1 KiB
C++
// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
|
|
// Copyright (C) 1999-2003 Forgotten
|
|
// Copyright (C) 2004 Forgotten and the VBA development team
|
|
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2, or(at your option)
|
|
// any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software Foundation,
|
|
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
#include "System.h"
|
|
|
|
extern int RGB_LOW_BITS_MASK;
|
|
|
|
void Pixelate(u8 *srcPtr, u32 srcPitch, u8 *deltaPtr,
|
|
u8 *dstPtr, u32 dstPitch, int width, int height)
|
|
{
|
|
u8 *nextLine, *finish;
|
|
u32 colorMask = ~(RGB_LOW_BITS_MASK | (RGB_LOW_BITS_MASK << 16));
|
|
|
|
nextLine = dstPtr + dstPitch;
|
|
|
|
do {
|
|
u32 *bP = (u32 *) srcPtr;
|
|
u32 *xP = (u32 *) deltaPtr;
|
|
u32 *dP = (u32 *) dstPtr;
|
|
u32 *nL = (u32 *) nextLine;
|
|
u32 currentPixel;
|
|
u32 nextPixel;
|
|
u32 currentDelta;
|
|
u32 nextDelta;
|
|
|
|
finish = (u8 *) bP + ((width+2) << 1);
|
|
nextPixel = *bP++;
|
|
nextDelta = *xP++;
|
|
|
|
do {
|
|
currentPixel = nextPixel;
|
|
currentDelta = nextDelta;
|
|
nextPixel = *bP++;
|
|
nextDelta = *xP++;
|
|
|
|
if ((nextPixel != nextDelta) || (currentPixel != currentDelta)) {
|
|
u32 colorA, colorB, product;
|
|
|
|
*(xP - 2) = currentPixel;
|
|
#ifdef WORDS_BIGENDIAN
|
|
colorA = currentPixel >> 16;
|
|
colorB = currentPixel & 0xffff;
|
|
#else
|
|
colorA = currentPixel & 0xffff;
|
|
colorB = currentPixel >> 16;
|
|
#endif
|
|
product = (((colorA & colorMask) >> 1) & colorMask) >> 1;
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
*(nL) = (product << 16) | (product);
|
|
*(dP) = (colorA << 16) | product;
|
|
#else
|
|
*(nL) = product | (product << 16);
|
|
*(dP) = colorA | (product << 16);
|
|
#endif
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
colorA = nextPixel >> 16;
|
|
#else
|
|
colorA = nextPixel & 0xffff;
|
|
#endif
|
|
product = (((colorB & colorMask) >> 1) & colorMask) >> 1;
|
|
#ifdef WORDS_BIGENDIAN
|
|
*(nL + 1) = (product << 16) | (product);
|
|
*(dP + 1) = (colorB << 16) | (product);
|
|
#else
|
|
*(nL + 1) = (product) | (product << 16);
|
|
*(dP + 1) = (colorB) | (product << 16);
|
|
#endif
|
|
}
|
|
|
|
dP += 2;
|
|
nL += 2;
|
|
} while ((u8 *) bP < finish);
|
|
|
|
deltaPtr += srcPitch;
|
|
srcPtr += srcPitch;
|
|
dstPtr += dstPitch << 1;
|
|
nextLine += dstPitch << 1;
|
|
}
|
|
while (--height);
|
|
}
|
|
|
|
void Pixelate32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
|
|
u8 *dstPtr, u32 dstPitch, int width, int height)
|
|
{
|
|
u8 *nextLine, *finish;
|
|
u32 colorMask = ~RGB_LOW_BITS_MASK;
|
|
|
|
nextLine = dstPtr + dstPitch;
|
|
|
|
do {
|
|
u32 *bP = (u32 *) srcPtr;
|
|
// u32 *xP = (u32 *) deltaPtr;
|
|
u32 *dP = (u32 *) dstPtr;
|
|
u32 *nL = (u32 *) nextLine;
|
|
u32 currentPixel;
|
|
u32 nextPixel;
|
|
|
|
finish = (u8 *) bP + ((width+1) << 2);
|
|
nextPixel = *bP++;
|
|
|
|
do {
|
|
currentPixel = nextPixel;
|
|
nextPixel = *bP++;
|
|
|
|
u32 colorA, colorB, product;
|
|
|
|
colorA = currentPixel;
|
|
colorB = nextPixel;
|
|
|
|
product = (((colorA & colorMask) >> 1) & colorMask) >> 1;
|
|
*(nL) = product;
|
|
*(nL+1) = product;
|
|
*(dP) = colorA;
|
|
*(dP+1) = product;
|
|
|
|
nextPixel = *bP++;
|
|
colorA = nextPixel;
|
|
product = (((colorB & colorMask) >> 1) & colorMask) >> 1;
|
|
*(nL + 2) = product;
|
|
*(nL + 3) = product;
|
|
*(dP + 2) = colorB;
|
|
*(dP + 3) = product;
|
|
|
|
dP += 4;
|
|
nL += 4;
|
|
} while ((u8 *) bP < finish);
|
|
|
|
srcPtr += srcPitch;
|
|
dstPtr += dstPitch << 1;
|
|
nextLine += dstPitch << 1;
|
|
}
|
|
while (--height);
|
|
}
|