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fix fpe in text drawing code

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IoIxD 2026-04-14 22:53:20 -07:00
commit 4ab846ad51
2 changed files with 12 additions and 18 deletions
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15
src/text/ft2.c
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@ -69,16 +69,13 @@ static int ft2_MwDrawText(MwWidget handle, MwFLFont ttf, MwPoint* point, const c
int ox = x + (ttf->face->glyph->metrics.horiBearingX / 64) + cx + ttf->face->glyph->bitmap_left;
int oy = y + (ttf->face->height * ttf->px / ttf->face->units_per_EM) - ttf->face->glyph->bitmap_top + cy + (ttf->face->descender * ttf->px / ttf->face->units_per_EM);
unsigned char* opx = &px[(oy * tw + ox) * 4];
if(opx[3] == 0) {
opx[0] = color->common.red;
opx[1] = color->common.green;
opx[2] = color->common.blue;
opx[3] = bmp->buffer[cy * bmp->pitch + cx];
opx[0] = color->common.red;
opx[1] = color->common.green;
opx[2] = color->common.blue;
/* overflow check */
if(opx[3] + bmp->buffer[cy * bmp->pitch + cx] < opx[3]) {
opx[3] = 255;
} else {
opx[0] = (opx[0] / color->common.red) / 255;
opx[1] = (opx[1] / color->common.green) / 255;
opx[2] = (opx[2] / color->common.blue) / 255;
opx[3] = bmp->buffer[cy * bmp->pitch + cx];
}
}

15
src/text/stbtt.c
View file

@ -52,16 +52,13 @@ static int stbtt_MwDrawText(MwWidget handle, MwFLFont ttf, MwPoint* point, const
int ox = x + ceil(lsb * ttf->scale) + cx;
int oy = y + ceil(ttf->ascent * ttf->scale) + y0 + cy;
unsigned char* opx = &px[(oy * tw + ox) * 4];
if(opx[3] == 0) {
opx[0] = color->common.red;
opx[1] = color->common.green;
opx[2] = color->common.blue;
opx[3] = out[cy * ow + cx];
opx[0] = color->common.red;
opx[1] = color->common.green;
opx[2] = color->common.blue;
/* overflow check */
if(opx[3] + out[cy * ow + cx] < opx[3]) {
opx[3] = 255;
} else {
opx[0] = (opx[0] / color->common.red) / 255;
opx[1] = (opx[1] / color->common.green) / 255;
opx[2] = (opx[2] / color->common.blue) / 255;
opx[3] = out[cy * ow + cx];
}
}