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Dont move back glyph on overflow in infinite ligatures

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Kovid Goyal
2021-07-05 14:47:01 +05:30
parent 0af3f102aa
commit e07ba2c53d
1 changed files with 5 additions and 5 deletions
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10
kitty/freetype.c
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@@ -567,7 +567,7 @@ copy_color_bitmap(uint8_t *src, pixel* dest, Region *src_rect, Region *dest_rect
} }
static inline void static inline void
place_bitmap_in_canvas(pixel *cell, ProcessedBitmap *bm, size_t cell_width, size_t cell_height, float x_offset, float y_offset, size_t baseline) { place_bitmap_in_canvas(pixel *cell, ProcessedBitmap *bm, size_t cell_width, size_t cell_height, float x_offset, float y_offset, size_t baseline, unsigned int glyph_num) {
// We want the glyph to be positioned inside the cell based on the bearingX // We want the glyph to be positioned inside the cell based on the bearingX
// and bearingY values, making sure that it does not overflow the cell. // and bearingY values, making sure that it does not overflow the cell.
@@ -577,8 +577,8 @@ place_bitmap_in_canvas(pixel *cell, ProcessedBitmap *bm, size_t cell_width, size
int32_t xoff = (ssize_t)(x_offset + bm->bitmap_left); int32_t xoff = (ssize_t)(x_offset + bm->bitmap_left);
if (xoff < 0) src.left += -xoff; if (xoff < 0) src.left += -xoff;
else dest.left = xoff; else dest.left = xoff;
// Move the dest start column back if the width overflows because of it // Move the dest start column back if the width overflows because of it, but only if we are not in a very long/infinite ligature
if (dest.left > 0 && dest.left + bm->width > cell_width) { if (glyph_num < 4 && dest.left > 0 && dest.left + bm->width > cell_width) {
uint32_t extra = dest.left + bm->width - cell_width; uint32_t extra = dest.left + bm->width - cell_width;
dest.left = extra > dest.left ? 0 : dest.left - extra; dest.left = extra > dest.left ? 0 : dest.left - extra;
} }
@@ -630,7 +630,7 @@ render_glyphs_in_cells(PyObject *f, bool bold, bool italic, hb_glyph_info_t *inf
x_offset = x + (float)positions[i].x_offset / 64.0f; x_offset = x + (float)positions[i].x_offset / 64.0f;
y = (float)positions[i].y_offset / 64.0f; y = (float)positions[i].y_offset / 64.0f;
if ((*was_colored || self->face->glyph->metrics.width > 0) && bm.width > 0) { if ((*was_colored || self->face->glyph->metrics.width > 0) && bm.width > 0) {
place_bitmap_in_canvas(canvas, &bm, canvas_width, cell_height, x_offset, y, baseline); place_bitmap_in_canvas(canvas, &bm, canvas_width, cell_height, x_offset, y, baseline, i);
} }
x += (float)positions[i].x_advance / 64.0f; x += (float)positions[i].x_advance / 64.0f;
free_processed_bitmap(&bm); free_processed_bitmap(&bm);
@@ -683,7 +683,7 @@ render_simple_text_impl(PyObject *s, const char *text, unsigned int baseline) {
FT_Bitmap *bitmap = &self->face->glyph->bitmap; FT_Bitmap *bitmap = &self->face->glyph->bitmap;
pbm = EMPTY_PBM; pbm = EMPTY_PBM;
populate_processed_bitmap(self->face->glyph, bitmap, &pbm, false); populate_processed_bitmap(self->face->glyph, bitmap, &pbm, false);
place_bitmap_in_canvas(canvas, &pbm, canvas_width, canvas_height, pen_x, 0, baseline); place_bitmap_in_canvas(canvas, &pbm, canvas_width, canvas_height, pen_x, 0, baseline, n);
pen_x += self->face->glyph->advance.x >> 6; pen_x += self->face->glyph->advance.x >> 6;
} }
ans.width = pen_x; ans.height = canvas_height; ans.width = pen_x; ans.height = canvas_height;