From c7d4d7cd1db1b5418150b5a74a6bc478c2aa2850 Mon Sep 17 00:00:00 2001 From: Rachael Alexanderson Date: Mon, 19 Dec 2016 03:51:54 -0500 Subject: [PATCH] - fixed: Sometimes it helps to stay positive. Especially when deciding whether to add or subtract the background in the span drawers. --- src/r_draw_pal.cpp | 48 +++++++++++++++++++++++----------------------- 1 file changed, 24 insertions(+), 24 deletions(-) diff --git a/src/r_draw_pal.cpp b/src/r_draw_pal.cpp index 9f474911e..a1bddb16b 100644 --- a/src/r_draw_pal.cpp +++ b/src/r_draw_pal.cpp @@ -1994,9 +1994,9 @@ namespace swrenderer spot = ((xfrac >> (32 - 6 - 6))&(63 * 64)) + (yfrac >> (32 - 6)); uint32_t fg = colormap[source[spot]]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest++ = RGB256k.RGB[r][g][b]; xfrac += xstep; @@ -2013,9 +2013,9 @@ namespace swrenderer spot = ((xfrac >> xshift) & xmask) + (yfrac >> yshift); uint32_t fg = colormap[source[spot]]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest++ = RGB256k.RGB[r][g][b]; xfrac += xstep; @@ -2064,9 +2064,9 @@ namespace swrenderer { uint32_t fg = colormap[texdata]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest = RGB256k.RGB[r][g][b]; } dest++; @@ -2089,9 +2089,9 @@ namespace swrenderer { uint32_t fg = colormap[texdata]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest = RGB256k.RGB[r][g][b]; } dest++; @@ -2135,9 +2135,9 @@ namespace swrenderer spot = ((xfrac >> (32 - 6 - 6))&(63 * 64)) + (yfrac >> (32 - 6)); uint32_t fg = colormap[source[spot]]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest++ = RGB256k.RGB[r][g][b]; xfrac += xstep; @@ -2154,9 +2154,9 @@ namespace swrenderer spot = ((xfrac >> xshift) & xmask) + (yfrac >> yshift); uint32_t fg = colormap[source[spot]]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest++ = RGB256k.RGB[r][g][b]; xfrac += xstep; @@ -2204,9 +2204,9 @@ namespace swrenderer { uint32_t fg = colormap[texdata]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest = RGB256k.RGB[r][g][b]; } dest++; @@ -2229,9 +2229,9 @@ namespace swrenderer { uint32_t fg = colormap[texdata]; uint32_t bg = *dest; - int r = MAX((palette[fg].r * _srcalpha - palette[bg].r * _destalpha)>>18, 0); - int g = MAX((palette[fg].g * _srcalpha - palette[bg].g * _destalpha)>>18, 0); - int b = MAX((palette[fg].b * _srcalpha - palette[bg].b * _destalpha)>>18, 0); + int r = MAX((palette[fg].r * _srcalpha + palette[bg].r * _destalpha)>>18, 0); + int g = MAX((palette[fg].g * _srcalpha + palette[bg].g * _destalpha)>>18, 0); + int b = MAX((palette[fg].b * _srcalpha + palette[bg].b * _destalpha)>>18, 0); *dest = RGB256k.RGB[r][g][b]; } dest++;