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quadblitter: finish qtrans_check() #989

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nick black 2020-09-04 23:53:42 -04:00 committed by Nick Black
parent e2238676a0
commit dbaf823c0f
1 changed files with 16 additions and 5 deletions
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21
src/lib/blit.c
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@ -275,12 +275,17 @@ quadrant_solver(uint32_t tl, uint32_t tr, uint32_t bl, uint32_t br,
// of priority -- if even one quadrant is transparent, we will have a // of priority -- if even one quadrant is transparent, we will have a
// transparent background, and lerp the rest together for foreground. we thus // transparent background, and lerp the rest together for foreground. we thus
// have a 16-way conditional tree in which each EGC must show up exactly once. // have a 16-way conditional tree in which each EGC must show up exactly once.
static const char* static inline const char*
qtrans_check(cell* c, bool bgr, bool blendcolors, qtrans_check(cell* c, bool bgr, bool blendcolors,
const unsigned char* rgbbase_tl, const unsigned char* rgbbase_tr, const unsigned char* rgbbase_tl, const unsigned char* rgbbase_tr,
const unsigned char* rgbbase_bl, const unsigned char* rgbbase_br){ const unsigned char* rgbbase_bl, const unsigned char* rgbbase_br){
const int rpos = bgr ? 2 : 0; const int rpos = bgr ? 2 : 0;
const int bpos = bgr ? 0 : 2; const int bpos = bgr ? 0 : 2;
uint32_t tl = 0, tr = 0, bl = 0, br = 0;
channel_set_rgb(&tl, rgbbase_tl[rpos], rgbbase_tl[1], rgbbase_tl[bpos]);
channel_set_rgb(&tr, rgbbase_tr[rpos], rgbbase_tr[1], rgbbase_tr[bpos]);
channel_set_rgb(&bl, rgbbase_bl[rpos], rgbbase_bl[1], rgbbase_bl[bpos]);
channel_set_rgb(&br, rgbbase_br[rpos], rgbbase_br[1], rgbbase_br[bpos]);
const char* egc = NULL; const char* egc = NULL;
if(ffmpeg_trans_p(bgr, rgbbase_tl[3])){ if(ffmpeg_trans_p(bgr, rgbbase_tl[3])){
// top left is transparent // top left is transparent
@ -301,7 +306,7 @@ qtrans_check(cell* c, bool bgr, bool blendcolors,
cell_set_fg_rgb(c, rgbbase_bl[rpos], rgbbase_bl[1], rgbbase_bl[bpos]); cell_set_fg_rgb(c, rgbbase_bl[rpos], rgbbase_bl[1], rgbbase_bl[bpos]);
egc = "▖"; egc = "▖";
}else{ }else{
// FIXME lerp for bottom cell_set_fchannel(c, lerp(bl, br));
egc = "▄"; egc = "▄";
} }
} }
@ -311,12 +316,14 @@ qtrans_check(cell* c, bool bgr, bool blendcolors,
cell_set_fg_rgb(c, rgbbase_tr[rpos], rgbbase_tr[1], rgbbase_tr[bpos]); cell_set_fg_rgb(c, rgbbase_tr[rpos], rgbbase_tr[1], rgbbase_tr[bpos]);
egc = "▝"; egc = "▝";
}else{ }else{
cell_set_fchannel(c, lerp(tr, br));
egc = "▐"; egc = "▐";
} }
}else if(ffmpeg_trans_p(bgr, rgbbase_br[3])){ // only br is transparent }else if(ffmpeg_trans_p(bgr, rgbbase_br[3])){ // only br is transparent
// FIXME lerp other two cell_set_fchannel(c, lerp(tr, bl));
egc = "▞"; egc = "▞";
}else{ }else{
cell_set_fchannel(c, trilerp(tr, bl, br));
egc = "▟"; egc = "▟";
} }
} }
@ -327,22 +334,26 @@ qtrans_check(cell* c, bool bgr, bool blendcolors,
cell_set_fg_rgb(c, rgbbase_tl[rpos], rgbbase_tl[1], rgbbase_tl[bpos]); cell_set_fg_rgb(c, rgbbase_tl[rpos], rgbbase_tl[1], rgbbase_tl[bpos]);
egc = "▘"; egc = "▘";
}else{ }else{
cell_set_fchannel(c, lerp(tl, br));
egc = "▚"; egc = "▚";
} }
}else if(ffmpeg_trans_p(bgr, rgbbase_br[3])){ }else if(ffmpeg_trans_p(bgr, rgbbase_br[3])){
cell_set_fchannel(c, lerp(tl, bl));
egc = "▌"; egc = "▌";
}else{ }else{
cell_set_fchannel(c, trilerp(tl, bl, br));
egc = "▙"; egc = "▙";
} }
}else if(ffmpeg_trans_p(bgr, rgbbase_bl[3])){ }else if(ffmpeg_trans_p(bgr, rgbbase_bl[3])){
if(ffmpeg_trans_p(bgr, rgbbase_br[3])){ // entire bottom is transparent if(ffmpeg_trans_p(bgr, rgbbase_br[3])){ // entire bottom is transparent
cell_set_fchannel(c, lerp(tl, tr));
egc = "▀"; egc = "▀";
}else{ // only bl is transparent }else{ // only bl is transparent
// FIXME lerp other three cell_set_fchannel(c, trilerp(tl, tr, br));
egc = "▜"; egc = "▜";
} }
}else if(ffmpeg_trans_p(bgr, rgbbase_br[3])){ // only br is transparent }else if(ffmpeg_trans_p(bgr, rgbbase_br[3])){ // only br is transparent
// FIXME lerp other three cell_set_fchannel(c, trilerp(tl, tr, bl));
egc = "▛"; egc = "▛";
}else{ }else{
return NULL; // no transparency return NULL; // no transparency