diff options
Diffstat (limited to 'text.c')
| -rw-r--r-- | text.c | 31 |
1 files changed, 15 insertions, 16 deletions
@@ -21,7 +21,7 @@ typedef struct { typedef struct { char32_t c; - bool defined; + int glyph_index; u32 texture; stbtt_packedchar data; } CharInfo; @@ -62,7 +62,7 @@ const TextRenderState text_render_state_default = { .min_y = -FLT_MAX, .max_y = +FLT_MAX, .color = {1, 0, 1, 1}, .x_largest = -FLT_MAX, .y_largest = -FLT_MAX, - .prev_char = 0, + .prev_glyph = 0, }; static char text_err[200]; @@ -198,20 +198,18 @@ static Status text_load_char(Font *font, char32_t c, CharInfo *info) { glGetError(); // clear error memset(info, 0, sizeof *info); - if (c != UNICODE_BOX_CHARACTER && stbtt_FindGlyphIndex(&font->stb_info, (int)c) == 0) { + info->glyph_index = stbtt_FindGlyphIndex(&font->stb_info, (int)c); + if (c != UNICODE_BOX_CHARACTER && info->glyph_index == 0) { // this code point is not defined by the font // use the box character if (!text_load_char(font, UNICODE_BOX_CHARACTER, info)) return false; info->c = c; - info->defined = false; arr_add(font->char_info[bucket], *info); return true; } - - info->defined = true; - + if (!font->textures) { if (!font_new_texture(font)) return false; @@ -314,7 +312,7 @@ float text_font_char_height(Font *font) { float text_font_char_width(Font *font, char32_t c) { CharInfo info = {0}; if (text_load_char(font, c, &info)) { - if (!info.defined && font->fallback) + if (!info.glyph_index && font->fallback) return text_font_char_width(font->fallback, c); return info.data.xadvance; } else { @@ -353,7 +351,9 @@ void text_render(Font *font) { } void text_char_with_state(Font *font, TextRenderState *state, char32_t c) { -top: +top:; + CharInfo info = {0}; + if (c >= 0x40000 && c < 0xE0000){ // these Unicode code points are currently unassigned. replace them with a Unicode box. // (specifically, we don't want to use extra memory for pages which @@ -362,12 +362,10 @@ top: } if (c >= UNICODE_CODE_POINTS) c = UNICODE_BOX_CHARACTER; // code points this big should never appear in valid Unicode - CharInfo info = {0}; - if (!text_load_char(font, c, &info)) return; - if (!info.defined && font->fallback) { + if (!info.glyph_index && font->fallback) { text_char_with_state(font->fallback, state, c); return; } @@ -383,9 +381,10 @@ top: goto ret; } - if (!font->force_monospace && state->prev_char && state->prev_char != '\n') { + if (!font->force_monospace && state->prev_glyph && info.glyph_index) { // kerning - state->x += (float)stbtt_GetCodepointKernAdvance(&font->stb_info, (int)state->prev_char, (int)c) + state->x += (float)stbtt_GetGlyphKernAdvance(&font->stb_info, + (int)state->prev_glyph, (int)info.glyph_index) * stbtt_ScaleForPixelHeight(&font->stb_info, font->char_height); } @@ -461,7 +460,7 @@ top: state->x_largest = state->x; if (state->y > state->y_largest) state->y_largest = state->y; - state->prev_char = c; + state->prev_glyph = info.glyph_index; } void text_utf8_with_state(Font *font, TextRenderState *state, const char *str) { @@ -556,7 +555,7 @@ static void font_free_textures(Font *font) { } void text_state_break_kerning(TextRenderState *state) { - state->prev_char = 0; + state->prev_glyph = 0; } void text_font_change_size(Font *font, float new_size) { |