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make Draw_SubPic do transparent pics

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This commit is contained in:
Bill Currie 2002-07-25 04:30:50 +00:00
parent de22355371
commit 51b189f56a
1 changed files with 34 additions and 6 deletions
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40
libs/video/renderer/sw/draw.c
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@ -372,8 +372,8 @@ void
Draw_SubPic (int x, int y, qpic_t *pic, int srcx, int srcy, int width,
int height)
{
byte *dest, *source;
int v;
byte *dest, *source, tbyte;
int u, v;
if ((x < 0) ||
(x + width > vid.width) || (y < 0) || (y + height > vid.height)) {
@ -384,10 +384,38 @@ Draw_SubPic (int x, int y, qpic_t *pic, int srcx, int srcy, int width,
dest = vid.buffer + y * vid.rowbytes + x;
for (v = 0; v < height; v++) {
memcpy (dest, source, width);
dest += vid.rowbytes;
source += pic->width;
if (width & 7) { // general
for (v = 0; v < height; v++) {
for (u = 0; u < width; u++)
if ((tbyte = source[u]) != TRANSPARENT_COLOR)
dest[u] = tbyte;
dest += vid.rowbytes;
source += pic->width;
}
} else { // unwound
for (v = 0; v < height; v++) {
for (u = 0; u < width; u += 8) {
if ((tbyte = source[u]) != TRANSPARENT_COLOR)
dest[u] = tbyte;
if ((tbyte = source[u + 1]) != TRANSPARENT_COLOR)
dest[u + 1] = tbyte;
if ((tbyte = source[u + 2]) != TRANSPARENT_COLOR)
dest[u + 2] = tbyte;
if ((tbyte = source[u + 3]) != TRANSPARENT_COLOR)
dest[u + 3] = tbyte;
if ((tbyte = source[u + 4]) != TRANSPARENT_COLOR)
dest[u + 4] = tbyte;
if ((tbyte = source[u + 5]) != TRANSPARENT_COLOR)
dest[u + 5] = tbyte;
if ((tbyte = source[u + 6]) != TRANSPARENT_COLOR)
dest[u + 6] = tbyte;
if ((tbyte = source[u + 7]) != TRANSPARENT_COLOR)
dest[u + 7] = tbyte;
}
dest += vid.rowbytes;
source += pic->width;
}
}
}