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Fix font's descender rounding to integer

This commit is contained in:
Francesco Abbate 2020-06-07 00:14:41 +02:00
parent 81289d651e
commit b978873a58
1 changed files with 3 additions and 5 deletions
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8
lib/font_renderer/font_renderer.cpp
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@ -160,13 +160,11 @@ int FontRendererBakeFontBitmap(FontRenderer *font_renderer, int font_height,
double ascender, descender; double ascender, descender;
renderer_alpha.get_font_vmetrics(ascender, descender); renderer_alpha.get_font_vmetrics(ascender, descender);
// FIXME: depending how we approximate ascender - descender could differ from font_height const int ascender_px = int(ascender * font_height);
const int ascender_px = int( ascender * font_height + 1.0); const int descender_px = ascender_px - font_height;
const int descender_px = -int(-descender * font_height + 1.0);
const int font_height_ext = ascender_px - descender_px;
const int pad_y = font_height / 10; const int pad_y = font_height / 10;
const int y_step = font_height_ext + 2 * pad_y; const int y_step = font_height + 2 * pad_y;
agg::lcd_distribution_lut& lcd_lut = font_renderer->lcd_distribution_lut(); agg::lcd_distribution_lut& lcd_lut = font_renderer->lcd_distribution_lut();
agg::rendering_buffer ren_buf((agg::int8u *) pixels, pixels_width * subpixel_scale, pixels_height, -pixels_width * subpixel_scale * pixel_size); agg::rendering_buffer ren_buf((agg::int8u *) pixels, pixels_width * subpixel_scale, pixels_height, -pixels_width * subpixel_scale * pixel_size);