fz_pixmap *
fz_render_stroked_glyph_pixmap(fz_context *ctx, fz_font *font, int gid, fz_matrix *trm, const fz_matrix *ctm, const fz_stroke_state *stroke, const fz_irect *scissor)
{
if (font->ft_face)
{
fz_matrix subpix_trm;
unsigned char qe, qf;
if (stroke->dash_len > 0)
return NULL;
(void)fz_subpixel_adjust(ctx, trm, &subpix_trm, &qe, &qf);
return fz_render_ft_stroked_glyph_pixmap(ctx, font, gid, &subpix_trm, ctm, stroke);
}
return fz_render_glyph_pixmap(ctx, font, gid, trm, scissor);
}
static struct glyph *lookup_glyph(fz_font *font, int gid, float *xp, float *yp)
{
fz_matrix trm, subpix_trm;
unsigned char subx, suby;
fz_pixmap *pixmap;
struct key key;
unsigned int pos;
int w, h;
/* match fitz's glyph cache quantization */
fz_scale(&trm, g_font_size, -g_font_size);
trm.e = *xp;
trm.f = *yp;
fz_subpixel_adjust(ctx, &trm, &subpix_trm, &subx, &suby);
*xp = trm.e;
*yp = trm.f;
/*
* Look it up in the table
*/
memset(&key, 0, sizeof key);
key.font = font;
key.gid = gid;
key.subx = subx;
key.suby = suby;
pos = lookup_table(&key);
if (g_table[pos].key.font)
return &g_table[pos].glyph;
/*
* Render the bitmap
*/
glEnd();
pixmap = fz_render_glyph_pixmap(ctx, font, gid, &subpix_trm, NULL);
w = pixmap->w;
h = pixmap->h;
/*
* Find an empty slot in the texture
*/
if (g_table_load == (MAXGLYPHS * 3) / 4)
{
puts("font cache table full, clearing cache");
clear_font_cache();
pos = lookup_table(&key);
}
if (h + PADDING > g_cache_h || w + PADDING > g_cache_w)
return NULL;
if (g_cache_row_x + w + PADDING > g_cache_w)
{
g_cache_row_y += g_cache_row_h + PADDING;
g_cache_row_x = PADDING;
g_cache_row_h = 0;
}
if (g_cache_row_y + h + PADDING > g_cache_h)
{
puts("font cache texture full, clearing cache");
clear_font_cache();
pos = lookup_table(&key);
}
/*
* Copy bitmap into texture
*/
memcpy(&g_table[pos].key, &key, sizeof(struct key));
g_table[pos].glyph.w = pixmap->w;
g_table[pos].glyph.h = pixmap->h;
g_table[pos].glyph.lsb = pixmap->x;
g_table[pos].glyph.top = -pixmap->y;
g_table[pos].glyph.s = g_cache_row_x;
g_table[pos].glyph.t = g_cache_row_y;
g_table_load ++;
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glPixelStorei(GL_UNPACK_ROW_LENGTH, pixmap->w);
glTexSubImage2D(GL_TEXTURE_2D, 0, g_cache_row_x, g_cache_row_y, w, h,
GL_ALPHA, GL_UNSIGNED_BYTE, pixmap->samples);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
fz_drop_pixmap(ctx, pixmap);
glBegin(GL_QUADS);
g_cache_row_x += w + PADDING;
if (g_cache_row_h < h + PADDING)
g_cache_row_h = h + PADDING;
return &g_table[pos].glyph;
}