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Fixed issues if one got into high codepoint ranges.

This commit is contained in:
Adam Harrison 2021-10-01 23:56:36 -04:00
parent 531cd3bedb
commit c5f60a7865
1 changed files with 14 additions and 19 deletions
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33
src/renderer.c
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@ -111,6 +111,7 @@ void font_load_glyphset(RenFont* font, int idx) {
unsigned int byte_width = font->subpixel ? 3 : 1;
for (int j = 0, pen_x = 0; j < bitmaps_cached; ++j) {
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);
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))
@ -121,6 +122,8 @@ void font_load_glyphset(RenFont* font, int idx) {
pen_x += glyph_width;
font->max_height = slot->bitmap.rows > font->max_height ? slot->bitmap.rows : font->max_height;
}
if (pen_x == 0)
continue;
set->surface = check_alloc(SDL_CreateRGBSurface(0, pen_x, font->max_height, font->subpixel ? 24 : 8, 0, 0, 0, 0));
unsigned char* pixels = set->surface->pixels;
for (int i = 0; i < 256; ++i) {
@ -137,11 +140,10 @@ void font_load_glyphset(RenFont* font, int idx) {
memcpy(&pixels[target_offset], &slot->bitmap.buffer[source_offset], slot->bitmap.width);
}
}
font->sets[j][idx] = set;
}
}
static GlyphSet* font_get_glyphset(RenFont* font, int codepoint, int subpixel_idx) {
static GlyphSet* font_get_glyphset(RenFont* font, unsigned int codepoint, int subpixel_idx) {
int idx = (codepoint >> 8) % MAX_GLYPHSET;
if (!font->sets[subpixel_idx][idx])
font_load_glyphset(font, idx);
@ -164,8 +166,7 @@ RenFont* ren_font_load(const char* path, float size, bool subpixel, unsigned cha
font->subpixel = subpixel;
font->hinting = hinting;
font->style = style;
GlyphSet* set = font_get_glyphset(font, ' ', 0);
font->space_advance = (int)set->metrics[' '].xadvance;
font->space_advance = (int)font_get_glyphset(font, ' ', 0)->metrics[' '].xadvance;
font->tab_advance = font->space_advance * 2;
return font;
failure:
@ -206,8 +207,8 @@ float ren_font_get_width(RenFont *font, const char *text) {
while (text < end) {
unsigned int codepoint;
text = utf8_to_codepoint(text, &codepoint);
float advance = font_get_glyphset(font, codepoint, 0)->metrics[codepoint % 256].xadvance;
width += advance ? advance : font->space_advance;
GlyphMetric* metric = &font_get_glyphset(font, codepoint, 0)->metrics[codepoint % 256];
width += metric->xadvance ? metric->xadvance : font->space_advance;
}
const int surface_scale = renwin_surface_scale(&window_renderer);
return width / surface_scale;
@ -237,10 +238,10 @@ float ren_draw_text(RenFont *font, const char *text, float x, int y, RenColor co
int bitmap_index = font->subpixel ? (int)(fmod(pen_x, 1.0) * SUBPIXEL_BITMAPS_CACHED) : 0;
GlyphSet* set = font_get_glyphset(font, codepoint, bitmap_index);
GlyphMetric* metric = &set->metrics[codepoint % 256];
unsigned char* source_pixels = set->surface->pixels;
int start_x = floor(pen_x) + metric->bitmap_left, end_x = metric->x1 - metric->x0 + pen_x;
int glyph_end = metric->x1, glyph_start = metric->x0;
if (color.a > 0 && end_x >= clip.x && start_x < clip_end_x) {
if (set->surface && color.a > 0 && end_x >= clip.x && start_x < clip_end_x) {
unsigned char* source_pixels = set->surface->pixels;
for (int line = metric->y0; line < metric->y1; ++line) {
int target_y = line + y - metric->y0 - metric->bitmap_top + font->size * surface_scale;
if (target_y < clip.y)
@ -291,16 +292,6 @@ static inline RenColor blend_pixel(RenColor dst, RenColor src) {
return dst;
}
#define rect_draw_loop(expr) \
for (int j = y1; j < y2; j++) { \
for (int i = x1; i < x2; i++) { \
*d = expr; \
d++; \
} \
d += dr; \
}
void ren_draw_rect(RenRect rect, RenColor color) {
if (color.a == 0) { return; }
@ -329,7 +320,11 @@ void ren_draw_rect(RenRect rect, RenColor color) {
SDL_Rect rect = { x1, y1, x2 - x1, y2 - y1 };
SDL_FillRect(surface, &rect, SDL_MapRGBA(surface->format, color.r, color.g, color.b, color.a));
} else {
rect_draw_loop(blend_pixel(*d, color));
for (int j = y1; j < y2; j++) {
for (int i = x1; i < x2; i++, d++)
*d = blend_pixel(*d, color);
d += dr;
}
}
}