dave/openttd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Change: Support custom transparency remaps with 32bpp blitters.

Browse Source 
This closes a 15 year old TODO...
This commit is contained in:
Peter Nelson
2023-12-22 16:01:33 +00:00
committed by Peter Nelson
parent 0bc22dd310
commit 9ce1626bb4
10 changed files with 114 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/blitter/40bpp_anim.cpp
View File

@@ -11,6 +11,7 @@
#include "../zoom_func.h"
#include "../settings_type.h"
#include "../video/video_driver.hpp"
#include "../palette_func.h"
#include "40bpp_anim.hpp"
#include "common.hpp"
@@ -234,10 +235,6 @@ inline void Blitter_40bppAnim::Draw(const Blitter::BlitterParams *bp, ZoomLevel
break;
case BM_TRANSPARENT:
/* TODO -- We make an assumption here that the remap in fact is transparency, not some colour.
* This is never a problem with the code we produce, but newgrfs can make it fail... or at least:
* we produce a result the newgrf maker didn't expect ;) */
/* Make the current colour a bit more black, so it looks like this image is transparent */
src_n += n;
if (src_px->a == 255) {
@@ -263,6 +260,28 @@ inline void Blitter_40bppAnim::Draw(const Blitter::BlitterParams *bp, ZoomLevel
}
break;
case BM_TRANSPARENT_REMAP:
/* Apply custom transparency remap. */
src_n += n;
if (src_px->a != 0) {
src_px += n;
do {
if (*anim != 0) {
*anim = bp->remap[*anim];
} else {
*dst = this->LookupColourInPalette(bp->remap[GetNearestColourIndex(*dst)]);
*anim = 0;
}
anim++;
dst++;
} while (--n != 0);
} else {
dst += n;
anim += n;
src_px += n;
}
break;
default:
if (src_px->a == 255) {
do {
@@ -323,6 +342,7 @@ void Blitter_40bppAnim::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomL
case BM_NORMAL: Draw<BM_NORMAL> (bp, zoom); return;
case BM_COLOUR_REMAP: Draw<BM_COLOUR_REMAP>(bp, zoom); return;
case BM_TRANSPARENT: Draw<BM_TRANSPARENT> (bp, zoom); return;
case BM_TRANSPARENT_REMAP: Draw<BM_TRANSPARENT_REMAP>(bp, zoom); return;
case BM_CRASH_REMAP: Draw<BM_CRASH_REMAP> (bp, zoom); return;
case BM_BLACK_REMAP: Draw<BM_BLACK_REMAP> (bp, zoom); return;
}