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macOS: Fix wide characters having their right edges slightly truncated

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This commit is contained in:
Kovid Goyal 2017-08-24 12:46:41 +05:30
parent 678bd97e1f
commit ddcd4daede
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 7 additions and 9 deletions
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16
kitty/core_text.m
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@ -123,14 +123,13 @@ cell_size(Face *self) {
#define count (128 - 32)
unichar chars[count+1] = {0};
CGGlyph glyphs[count+1] = {0};
for (int i = 0; i < count; i++) chars[i] = 32 + i;
unsigned int width = 0, w, i;
for (i = 0; i < count; i++) chars[i] = 32 + i;
CTFontGetGlyphsForCharacters(self->font, chars, glyphs, count);
CGSize advances[1] = {0};
unsigned int width = 0, w;
for (int i = 0; i < count; i++) {
for (i = 0; i < count; i++) {
if (glyphs[i]) {
CTFontGetAdvancesForGlyphs(self->font, kCTFontOrientationHorizontal, glyphs+1, advances, 1);
w = (unsigned int)(ceilf(advances[0].width));
w = (unsigned int)(ceilf(
CTFontGetAdvancesForGlyphs(self->font, kCTFontOrientationHorizontal, glyphs+i, NULL, 1)));
if (w > width) width = w;
}
}
@ -177,9 +176,8 @@ render_char(Face *self, PyObject *args) {
// TODO: Scale the glyph if its bbox is larger than the image by using a non-identity transform
/* CGRect rect = CTFontGetBoundingRectsForGlyphs(font, kCTFontOrientationHorizontal, glyphs, 0, 1); */
CGContextSetTextMatrix(ctx, transform);
CGFloat leading = self->leading > 0 ? self->leading : 1; // Ensure at least one pixel of leading so that antialiasing works at the left edge
CGFloat pos_x = leading, pos_y = height - self->ascent;
CGContextSetTextPosition(ctx, pos_x, pos_y);
CGFloat pos_y = height - self->ascent;
CGContextSetTextPosition(ctx, 0, pos_y);
CTFontDrawGlyphs(font, &glyph, &CGPointZero, 1, ctx);
}