static GF_Err gdip_get_font_info(GF_FontReader *dr, char **font_name, s32 *em_size, s32 *ascent, s32 *descent, s32 *underline, s32 *line_spacing, s32 *max_advance_h, s32 *max_advance_v)
{
UINT16 val, em;
FontPriv *ctx = (FontPriv *)dr->udta;
*font_name = NULL;
*em_size = *ascent = *descent = *line_spacing = *max_advance_h = *max_advance_v = 0;
if (!ctx->font) return GF_BAD_PARAM;
GdipGetEmHeight(ctx->font, ctx->font_style, &em);
*em_size = (s32) em;
GdipGetCellAscent(ctx->font, ctx->font_style, &val);
ctx->ascent = (Float) val;
*ascent = (s32) val;
GdipGetCellDescent(ctx->font, ctx->font_style, &val);
*descent = (s32) val; *descent *= -1;
ctx->descent = -1 * (Float) val;
*underline = *descent / 2;
GdipGetLineSpacing(ctx->font, ctx->font_style, &val);
*line_spacing = (s32) val;
*max_advance_v = *ascent - *descent;
unsigned short test_str[4];
Fixed w, h, w2;
ctx->em_size = (Float) *em_size;
test_str[0] = (unsigned short) '_';
test_str[1] = (unsigned short) '\0';
gdip_get_text_size(dr, test_str, &w, &h);
ctx->underscore_width = FIX2FLT(w);
test_str[0] = (unsigned short) '_';
test_str[1] = (unsigned short) ' ';
test_str[2] = (unsigned short) '_';
test_str[3] = (unsigned short) '\0';
gdip_get_text_size(dr, test_str, &w2, &h);
ctx->whitespace_width = FIX2FLT(w2 - 2*w);
*max_advance_h = (s32) MAX(ctx->underscore_width, ctx->whitespace_width);
return GF_OK;
}
static M4Err gdip_set_font_size(FontRaster *dr, Float pixel_size)
{
unsigned short test_str[4];
FontPriv *ctx = (FontPriv *)dr->priv;
if (!ctx->font) return M4BadParam;
ctx->font_size = pixel_size;
/*GDI+ won't return begin/end whitespace info through GetBoundingRect, so compute a default value for space...*/
ctx->whitespace_width = 0;
Float w, h, w2;
test_str[0] = (unsigned short) '_';
test_str[1] = (unsigned short) '\0';
gdip_get_text_size(dr, test_str, &w, &h);
ctx->underscore_width = w;
test_str[0] = (unsigned short) '_';
test_str[1] = (unsigned short) ' ';
test_str[2] = (unsigned short) '_';
test_str[3] = (unsigned short) '\0';
gdip_get_text_size(dr, test_str, &w2, &h);
ctx->whitespace_width = w2 - 2*w;
return M4OK;
}