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#177 fix for blitter with negative coords

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This commit is contained in:
FunkyFr3sh 2022-09-27 22:45:13 +02:00
parent a0d28a0e6e
commit 228063839a
1 changed files with 18 additions and 4 deletions
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22
src/ddsurface.c
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@ -91,10 +91,24 @@ HRESULT dds_Blt(
} }
if (dst_rect.left < 0) if (dst_rect.left < 0)
{
src_rect.left += abs(dst_rect.left);
if (src_rect.left > src_rect.right)
src_rect.left = src_rect.right;
dst_rect.left = 0; dst_rect.left = 0;
}
if (dst_rect.top < 0) if (dst_rect.top < 0)
{
src_rect.top += abs(dst_rect.top);
if (src_rect.top > src_rect.bottom)
src_rect.top = src_rect.bottom;
dst_rect.top = 0; dst_rect.top = 0;
}
if (dst_rect.right > This->width) if (dst_rect.right > This->width)
dst_rect.right = This->width; dst_rect.right = This->width;
@ -213,14 +227,14 @@ HRESULT dds_Blt(
color_key.dwColorSpaceHighValue = color_key.dwColorSpaceLowValue; color_key.dwColorSpaceHighValue = color_key.dwColorSpaceLowValue;
} }
if (src_w == dst_w && src_h == dst_h && !mirror_left_right && !mirror_up_down) if (!is_stretch_blt && !mirror_left_right && !mirror_up_down)
{ {
blt_colorkey( blt_colorkey(
dst_buf, dst_buf,
dst_x, dst_x,
dst_y, dst_y,
dst_w, min(dst_w, src_w),
dst_h, min(dst_h, src_h),
This->l_pitch, This->l_pitch,
src_buf, src_buf,
src_x, src_x,
@ -252,7 +266,7 @@ HRESULT dds_Blt(
This->bpp); This->bpp);
} }
} }
else if (is_stretch_blt) else if (is_stretch_blt && (src_w != dst_w || src_h != dst_h))
{ {
blt_stretch( blt_stretch(
dst_buf, dst_buf,