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Finish up Core Text based rendering

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Kovid Goyal
2017-01-11 14:13:37 +05:30
parent 8e7250eb7a
commit 426f960b23
3 changed files with 33 additions and 10 deletions
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9
kitty/core_text.m
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@@ -133,13 +133,13 @@ cell_size(Face *self) {
if (w > width) width = w;
}
}
return Py_BuildValue("I", width + 2); // + 2 for antialiasing which needs pixels on either side
return Py_BuildValue("I", width);
#undef count
}
static PyObject*
render_char(Face *self, PyObject *args) {
#define render_char_doc ""
#define render_char_doc "Render the specified character into the specified buffer. Combining unicode chars should be handled automatically (I hope)"
char *s;
unsigned int width, height;
PyObject *pbuf;
@@ -168,10 +168,11 @@ render_char(Face *self, PyObject *args) {
CGContextSetTextDrawingMode(ctx, kCGTextFill);
CGGlyph glyph = glyphs[0];
if (glyph) {
CGRect rect = CTFontGetBoundingRectsForGlyphs(font, kCTFontOrientationHorizontal, glyphs, 0, 1);
// 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 pos_x = -rect.origin.x + 1, pos_y = height - rect.origin.y - rect.size.height;
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);
CTFontDrawGlyphs(font, &glyph, &CGPointZero, 1, ctx);
}