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Added in support for font groupings.

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This commit is contained in:
Adam Harrison
2021-10-12 23:24:52 -04:00
parent 3e2b0f28c8
commit f2488fdd8d
6 changed files with 115 additions and 54 deletions
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src/renderer.c
+44 -22
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@@ -29,7 +29,7 @@ static void* check_alloc(void *ptr) {
/************************* Fonts *************************/
typedef struct {
unsigned short x0, x1, y0, y1;
unsigned short x0, x1, y0, y1, loaded;
short bitmap_left, bitmap_top;
float xadvance;
} GlyphMetric;
@@ -113,12 +113,12 @@ void font_load_glyphset(RenFont* font, int idx) {
GlyphSet* set = check_alloc(calloc(1, sizeof(GlyphSet)));
font->sets[j][idx] = set;
for (int i = 0; i < 256; ++i) {
int glyph_index = FT_Get_Char_Index( font->face, i + idx * MAX_GLYPHSET);
int glyph_index = FT_Get_Char_Index(font->face, i + idx * MAX_GLYPHSET);
if (!glyph_index || FT_Load_Glyph(font->face, glyph_index, load_option | FT_LOAD_BITMAP_METRICS_ONLY) || font_set_style(&font->face->glyph->outline, j * (64 / SUBPIXEL_BITMAPS_CACHED), font->style) || FT_Render_Glyph(font->face->glyph, render_option))
continue;
FT_GlyphSlot slot = font->face->glyph;
int glyph_width = slot->bitmap.width / byte_width;
set->metrics[i] = (GlyphMetric){ pen_x, pen_x + glyph_width, 0, slot->bitmap.rows, slot->bitmap_left, slot->bitmap_top, (slot->advance.x + slot->lsb_delta - slot->rsb_delta) / 64.0f};
set->metrics[i] = (GlyphMetric){ pen_x, pen_x + glyph_width, 0, slot->bitmap.rows, true, slot->bitmap_left, slot->bitmap_top, (slot->advance.x + slot->lsb_delta - slot->rsb_delta) / 64.0f};
pen_x += glyph_width;
font->max_height = slot->bitmap.rows > font->max_height ? slot->bitmap.rows : font->max_height;
}
@@ -192,39 +192,49 @@ void ren_font_free(RenFont* font) {
free(font);
}
void ren_font_set_tab_size(RenFont *font, int n) {
for (int i = 0; i < (font->subpixel ? SUBPIXEL_BITMAPS_CACHED : 1); ++i)
font_get_glyphset(font, '\t', i)->metrics['\t'].xadvance = font->space_advance * n;
void ren_font_group_set_tab_size(RenFont **fonts, int n) {
for (int j = 0; j < FONT_FALLBACK_MAX && fonts[j]; ++j) {
for (int i = 0; i < (fonts[j]->subpixel ? SUBPIXEL_BITMAPS_CACHED : 1); ++i)
font_get_glyphset(fonts[j], '\t', i)->metrics['\t'].xadvance = fonts[j]->space_advance * n;
}
}
int ren_font_get_tab_size(RenFont *font) {
return font_get_glyphset(font, '\t', 0)->metrics['\t'].xadvance / font->space_advance;
int ren_font_group_get_tab_size(RenFont **fonts) {
return font_get_glyphset(fonts[0], '\t', 0)->metrics['\t'].xadvance / fonts[0]->space_advance;
}
float ren_font_get_width(RenFont *font, const char *text) {
float ren_font_group_get_width(RenFont **fonts, const char *text) {
float width = 0;
const char* end = text + strlen(text);
GlyphMetric* metric;
while (text < end) {
unsigned int codepoint;
text = utf8_to_codepoint(text, &codepoint);
GlyphMetric* metric = &font_get_glyphset(font, codepoint, 0)->metrics[codepoint % 256];
width += metric->xadvance ? metric->xadvance : font->space_advance;
for (int i = 0; i < FONT_FALLBACK_MAX && fonts[i]; ++i) {
metric = &font_get_glyphset(fonts[i], codepoint, 0)->metrics[codepoint % 256];
if (metric->loaded || codepoint < 0xFF)
break;
}
if (!metric->loaded && codepoint > 0xFF)
metric = &font_get_glyphset(fonts[0], 0x25A1, 0)->metrics[0x25A1 % 256];
width += metric->xadvance ? metric->xadvance : fonts[0]->space_advance;
}
const int surface_scale = renwin_surface_scale(&window_renderer);
return width / surface_scale;
}
float ren_font_get_size(RenFont *font) {
return font->size;
float ren_font_group_get_size(RenFont **fonts) {
return fonts[0]->size;
}
int ren_font_get_height(RenFont *font) {
return font->size + 3;
int ren_font_group_get_height(RenFont **fonts) {
return fonts[0]->size + 3;
}
float ren_draw_text(RenFont *font, const char *text, float x, int y, RenColor color) {
float ren_draw_text(RenFont **fonts, const char *text, float x, int y, RenColor color) {
SDL_Surface *surface = renwin_get_surface(&window_renderer);
const RenRect clip = window_renderer.clip;
RenFont* font;
const int surface_scale = renwin_surface_scale(&window_renderer);
float pen_x = x * surface_scale;
y *= surface_scale;
@@ -235,9 +245,21 @@ float ren_draw_text(RenFont *font, const char *text, float x, int y, RenColor co
while (text < end) {
unsigned int codepoint, r, g, b;
text = utf8_to_codepoint(text, &codepoint);
int bitmap_index = font->subpixel ? (int)(fmod(pen_x, 1.0) * SUBPIXEL_BITMAPS_CACHED) : 0;
GlyphSet* set = font_get_glyphset(font, codepoint, bitmap_index + (bitmap_index < 0 ? SUBPIXEL_BITMAPS_CACHED : 0));
GlyphMetric* metric = &set->metrics[codepoint % 256];
GlyphSet* set; GlyphMetric* metric;
for (int i = 0; i < FONT_FALLBACK_MAX && fonts[i]; ++i) {
font = fonts[i];
int bitmap_index = font->subpixel ? (int)(fmod(pen_x, 1.0) * SUBPIXEL_BITMAPS_CACHED) : 0;
set = font_get_glyphset(font, codepoint, bitmap_index + (bitmap_index < 0 ? SUBPIXEL_BITMAPS_CACHED : 0));
metric = &set->metrics[codepoint % 256];
if (metric->loaded || codepoint < 0xFF)
break;
}
if (!metric->loaded && codepoint > 0xFF) {
codepoint = 0x25A1; font = fonts[0];
int bitmap_index = font->subpixel ? (int)(fmod(pen_x, 1.0) * SUBPIXEL_BITMAPS_CACHED) : 0;
set = font_get_glyphset(font, codepoint, bitmap_index + (bitmap_index < 0 ? SUBPIXEL_BITMAPS_CACHED : 0));
metric = &set->metrics[codepoint % 256];
}
int start_x = floor(pen_x) + metric->bitmap_left;
int end_x = (metric->x1 - metric->x0) + start_x;
int glyph_end = metric->x1, glyph_start = metric->x0;
@@ -282,10 +304,10 @@ float ren_draw_text(RenFont *font, const char *text, float x, int y, RenColor co
}
}
}
pen_x += metric->xadvance ? metric->xadvance : font->space_advance;
pen_x += metric->xadvance ? metric->xadvance : font->space_advance;
}
if (font->style & FONT_STYLE_UNDERLINE)
ren_draw_rect((RenRect){ x, y / surface_scale + ren_font_get_height(font) - 1, (pen_x - x) / surface_scale, 1 }, color);
if (fonts[0]->style & FONT_STYLE_UNDERLINE)
ren_draw_rect((RenRect){ x, y / surface_scale + ren_font_group_get_height(fonts) - 1, (pen_x - x) / surface_scale, 1 }, color);
return pen_x / surface_scale;
}