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support mirror blt with DDBLT_KEYSRC

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This commit is contained in:
FunkyFr3sh 2021-05-10 23:40:42 +02:00
parent 3e9c38dade
commit 1923e2bb0c
1 changed files with 48 additions and 28 deletions
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76
src/ddsurface.c
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@ -162,43 +162,65 @@ HRESULT dds_Blt(IDirectDrawSurfaceImpl *This, LPRECT lpDestRect, LPDIRECTDRAWSUR
(dwFlags & DDBLT_KEYSRCOVERRIDE) ? (dwFlags & DDBLT_KEYSRCOVERRIDE) ?
lpDDBltFx->ddckSrcColorkey.dwColorSpaceHighValue : src_surface->color_key.dwColorSpaceHighValue; lpDDBltFx->ddckSrcColorkey.dwColorSpaceHighValue : src_surface->color_key.dwColorSpaceHighValue;
BOOL got_fx = (dwFlags & DDBLT_DDFX) && lpDDBltFx;
BOOL mirror_left_right = got_fx && (lpDDBltFx->dwDDFX & DDBLTFX_MIRRORLEFTRIGHT);
BOOL mirror_up_down = got_fx && (lpDDBltFx->dwDDFX & DDBLTFX_MIRRORUPDOWN);
float scale_w = (float)src_w / dst_w; float scale_w = (float)src_w / dst_w;
float scale_h = (float)src_h / dst_h; float scale_h = (float)src_h / dst_h;
if (This->bpp == 8) if (This->bpp == 8)
{ {
int y1, x1; for (int y = 0; y < dst_h; y++)
for (y1 = 0; y1 < dst_h; y1++)
{ {
int ydst = This->width * (y1 + dst_y); int scaled_y = (int)(y * scale_h);
int ysrc = src_surface->width * ((int)(y1 * scale_h) + src_y);
for (x1 = 0; x1 < dst_w; x1++) if (mirror_up_down)
scaled_y = src_h - 1 - scaled_y;
int rc_src_y = src_surface->width * (scaled_y + src_y);
int rc_dst_y = This->width * (y + dst_y);
for (int x = 0; x < dst_w; x++)
{ {
unsigned char c = ((unsigned char*)src_buf)[(int)(x1 * scale_w) + src_x + ysrc]; int scaled_x = (int)(x * scale_w);
if (mirror_left_right)
scaled_x = src_w - 1 - scaled_x;
unsigned char c = ((unsigned char*)src_buf)[scaled_x + src_x + rc_src_y];
if (c < color_key.dwColorSpaceLowValue || c > color_key.dwColorSpaceHighValue) if (c < color_key.dwColorSpaceLowValue || c > color_key.dwColorSpaceHighValue)
{ {
((unsigned char*)dst_buf)[x1 + dst_x + ydst] = c; ((unsigned char*)dst_buf)[x + dst_x + rc_dst_y] = c;
} }
} }
} }
} }
else if (This->bpp == 16) else if (This->bpp == 16)
{ {
int y1, x1; for (int y = 0; y < dst_h; y++)
for (y1 = 0; y1 < dst_h; y1++)
{ {
int ydst = This->width * (y1 + dst_y); int scaled_y = (int)(y * scale_h);
int ysrc = src_surface->width * ((int)(y1 * scale_h) + src_y);
for (x1 = 0; x1 < dst_w; x1++) if (mirror_up_down)
scaled_y = src_h - 1 - scaled_y;
int rc_src_y = src_surface->width * (scaled_y + src_y);
int rc_dst_y = This->width * (y + dst_y);
for (int x = 0; x < dst_w; x++)
{ {
unsigned short c = ((unsigned short*)src_buf)[(int)(x1 * scale_w) + src_x + ysrc]; int scaled_x = (int)(x * scale_w);
if (mirror_left_right)
scaled_x = src_w - 1 - scaled_x;
unsigned short c = ((unsigned short*)src_buf)[scaled_x + src_x + rc_src_y];
if (c < color_key.dwColorSpaceLowValue || c > color_key.dwColorSpaceHighValue) if (c < color_key.dwColorSpaceLowValue || c > color_key.dwColorSpaceHighValue)
{ {
((unsigned short*)dst_buf)[x1 + dst_x + ydst] = c; ((unsigned short*)dst_buf)[x + dst_x + rc_dst_y] = c;
} }
} }
} }
@ -508,38 +530,36 @@ HRESULT dds_BltFast(IDirectDrawSurfaceImpl *This, DWORD dst_x, DWORD dst_y, LPDI
{ {
if (This->bpp == 8) if (This->bpp == 8)
{ {
int y1, x1; for (int y = 0; y < dst_h; y++)
for (y1 = 0; y1 < dst_h; y1++)
{ {
int ydst = This->width * (y1 + dst_y); int rc_dst_y = This->width * (y + dst_y);
int ysrc = src_surface->width * (y1 + src_y); int rc_src_y = src_surface->width * (y + src_y);
for (x1 = 0; x1 < dst_w; x1++) for (int x = 0; x < dst_w; x++)
{ {
unsigned char c = ((unsigned char *)src_buf)[x1 + src_x + ysrc]; unsigned char c = ((unsigned char *)src_buf)[x + src_x + rc_src_y];
if (c < src_surface->color_key.dwColorSpaceLowValue || c > src_surface->color_key.dwColorSpaceHighValue) if (c < src_surface->color_key.dwColorSpaceLowValue || c > src_surface->color_key.dwColorSpaceHighValue)
{ {
((unsigned char *)dst_buf)[x1 + dst_x + ydst] = c; ((unsigned char *)dst_buf)[x + dst_x + rc_dst_y] = c;
} }
} }
} }
} }
else if (This->bpp == 16) else if (This->bpp == 16)
{ {
int y1, x1; for (int y = 0; y < dst_h; y++)
for (y1 = 0; y1 < dst_h; y1++)
{ {
int ydst = This->width * (y1 + dst_y); int rc_dst_y = This->width * (y + dst_y);
int ysrc = src_surface->width * (y1 + src_y); int rc_src_y = src_surface->width * (y + src_y);
for (x1 = 0; x1 < dst_w; x1++) for (int x = 0; x < dst_w; x++)
{ {
unsigned short c = ((unsigned short *)src_buf)[x1 + src_x + ysrc]; unsigned short c = ((unsigned short *)src_buf)[x + src_x + rc_src_y];
if (c < src_surface->color_key.dwColorSpaceLowValue || c > src_surface->color_key.dwColorSpaceHighValue) if (c < src_surface->color_key.dwColorSpaceLowValue || c > src_surface->color_key.dwColorSpaceHighValue)
{ {
((unsigned short *)dst_buf)[x1 + dst_x + ydst] = c; ((unsigned short *)dst_buf)[x + dst_x + rc_dst_y] = c;
} }
} }
} }