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try fixing lua drawing alpha blending stuff

This commit is contained in:
zeromus 2011-07-01 04:01:20 +00:00
parent b5487e4acd
commit 5975decb3d
1 changed files with 2 additions and 2 deletions
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4
src/lua-engine.cpp
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@ -3430,7 +3430,7 @@ static int gui_gdscreenshot(lua_State *L) {
for (int y=0; y < height; y++) { for (int y=0; y < height; y++) {
for (int x=0; x < width; x++) { for (int x=0; x < width; x++) {
uint8 index = XBuf[(y+8)*256 + x]; uint8 index = XBuf[(y)*256 + x];
// Write A,R,G,B (alpha=0 for us): // Write A,R,G,B (alpha=0 for us):
*ptr = 0; *ptr = 0;
@ -5399,7 +5399,7 @@ void FCEU_LuaGui(uint8 *XBuf) {
else { else {
// alpha-blending // alpha-blending
uint8 scr_red, scr_green, scr_blue; uint8 scr_red, scr_green, scr_blue;
FCEUD_GetPalette(XBuf[(y+8)*256+x], &scr_red, &scr_green, &scr_blue); FCEUD_GetPalette(XBuf[(y)*256+x], &scr_red, &scr_green, &scr_blue);
r = (((int) gui_red - scr_red) * gui_alpha / 255 + scr_red) & 255; r = (((int) gui_red - scr_red) * gui_alpha / 255 + scr_red) & 255;
g = (((int) gui_green - scr_green) * gui_alpha / 255 + scr_green) & 255; g = (((int) gui_green - scr_green) * gui_alpha / 255 + scr_green) & 255;
b = (((int) gui_blue - scr_blue) * gui_alpha / 255 + scr_blue) & 255; b = (((int) gui_blue - scr_blue) * gui_alpha / 255 + scr_blue) & 255;