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edit_image(): add removal of transparency with white and black

This commit is contained in:
stefan schippers 2024-03-18 10:54:10 +01:00
parent cfccb64026
commit 197379989a
2 changed files with 17 additions and 0 deletions
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15
src/draw.c
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@ -3886,6 +3886,8 @@ cairo_status_t png_writer(void *in_closure, const unsigned char *in_data, unsign
* 4: set black to transparent * 4: set black to transparent
* 8: set transparent to white * 8: set transparent to white
* 16: set transparent to black * 16: set transparent to black
* 32: blend with white, remove alpha
* 64: blend with black, remove alpha
* 256: write back into `image_data` attribute * 256: write back into `image_data` attribute
*/ */
int edit_image(int what, xRect *r) int edit_image(int what, xRect *r)
@ -3962,6 +3964,19 @@ int edit_image(int what, xRect *r)
if(a == 0) {r = g = b = 0x00; a = 0xff;} if(a == 0) {r = g = b = 0x00; a = 0xff;}
} }
/* remove alpha, blend with white */
if(what & 32) {
r += (unsigned char)(0xff - a);
g += (unsigned char)(0xff - a);
b += (unsigned char)(0xff - a);
a = (unsigned char)0xff;
}
/* remove alpha, blend with black */
if(what & 64) {
a = (unsigned char)0xff;
}
/* write result back */ /* write result back */
ptr[3] = a; ptr[3] = a;
ptr[2] = r; ptr[2] = r;

2
src/scheduler.c
View File

@ -2063,6 +2063,8 @@ int xschem(ClientData clientdata, Tcl_Interp *interp, int argc, const char * arg
if(!strcmp(argv[i], "black_transp")) what |= 4; if(!strcmp(argv[i], "black_transp")) what |= 4;
if(!strcmp(argv[i], "transp_white")) what |= 8; if(!strcmp(argv[i], "transp_white")) what |= 8;
if(!strcmp(argv[i], "transp_black")) what |= 16; if(!strcmp(argv[i], "transp_black")) what |= 16;
if(!strcmp(argv[i], "blend_white")) what |= 32;
if(!strcmp(argv[i], "blend_black")) what |= 64;
if(!strcmp(argv[i], "write_back")) what |= 256; if(!strcmp(argv[i], "write_back")) what |= 256;
} }
if(what) { if(what) {