thirdparty/scummvm
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TinyGL: Support for different color modes, first part.

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This commit is contained in:
Giulio Camuffo 2012-01-16 17:12:14 +01:00
parent d35a890f46
commit 158a19df31
24 changed files with 521 additions and 272 deletions
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27
graphics/tinygl/image_util.cpp
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@ -3,29 +3,6 @@
namespace TinyGL {
// image conversion
void gl_convertRGB_to_5R6G5B8A(unsigned short *pixmap, unsigned char *rgba, int xsize, int ysize) {
int i, n;
unsigned char *p, *p2;
p = rgba;
n = xsize * ysize;
p2 = (unsigned char *)pixmap;
for (i = 0; i < n; i++) {
unsigned short pixel = ((p[0] & 0xF8) << 8) | ((p[1] & 0xFC) << 3) | (p[2] >> 3);
#ifdef SCUMM_BIG_ENDIAN
p2[3 * i + 0] = pixel >> 8;
p2[3 * i + 1] = pixel & 0xff;
#else
p2[3 * i + 0] = pixel & 0xff;
p2[3 * i + 1] = pixel >> 8;
#endif
p2[3 * i + 2] = p[3];
p += 4;
}
}
// linear interpolation with xf, yf normalized to 2^16
#define INTERP_NORM_BITS 16
@ -35,7 +12,7 @@ static inline int interpolate(int v00, int v01, int v10, int xf, int yf) {
return v00 + (((v01 - v00) * xf + (v10 - v00) * yf) >> INTERP_NORM_BITS);
}
// TODO: more accurate resampling
// TODO: more accurate resampling
void gl_resizeImage(unsigned char *dest, int xsize_dest, int ysize_dest,
unsigned char *src, int xsize_src, int ysize_src) {
@ -46,7 +23,7 @@ void gl_resizeImage(unsigned char *dest, int xsize_dest, int ysize_dest,
pix = dest;
pix_src = src;
x1inc = (float)(xsize_src - 1) / (float)(xsize_dest - 1);
y1inc = (float)(ysize_src - 1) / (float)(ysize_dest - 1);