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Cleanup: replace macros with inline functions for font drawing 

Also assert blf_font_ensure_ascii_kerning has been called in
blf_kerning_step_fast.
This commit is contained in:
Campbell Barton 2021-08-16 13:44:02 +10:00
parent eb278f5e12
commit 6aebbe6a0a
1 changed files with 75 additions and 61 deletions
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136
source/blender/blenfont/intern/blf_font.c
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@ -329,23 +329,29 @@ static void blf_font_ensure_ascii_kerning(FontBLF *font,
* characters.
*/
#define BLF_UTF8_NEXT_FAST(_font, _gc, _g, _str, _i, _c) \
if (((_c) = (_str)[_i]) < GLYPH_ASCII_TABLE_SIZE) { \
if ((_g = (_gc->glyph_ascii_table)[_c]) == NULL) { \
_g = blf_glyph_add(_font, _gc, FT_Get_Char_Index((_font)->face, _c), _c); \
_gc->glyph_ascii_table[_c] = _g; \
} \
_i++; \
} \
else if ((_c = BLI_str_utf8_as_unicode_step(_str, &(_i))) != BLI_UTF8_ERR) { \
if ((_g = blf_glyph_search(_gc, _c)) == NULL) { \
_g = blf_glyph_add(_font, _gc, FT_Get_Char_Index((_font)->face, _c), _c); \
} \
} \
else { \
_g = NULL; \
} \
(void)0
BLI_INLINE GlyphBLF *blf_utf8_next_fast(
FontBLF *font, GlyphCacheBLF *gc, const char *str, size_t *i_p, uint *r_c)
{
GlyphBLF *g;
if ((*r_c = str[*i_p]) < GLYPH_ASCII_TABLE_SIZE) {
g = (gc->glyph_ascii_table)[*r_c];
if (UNLIKELY(g == NULL)) {
g = blf_glyph_add(font, gc, FT_Get_Char_Index(font->face, *r_c), *r_c);
gc->glyph_ascii_table[*r_c] = g;
}
(*i_p)++;
}
else if ((*r_c = BLI_str_utf8_as_unicode_step(str, i_p)) != BLI_UTF8_ERR) {
g = blf_glyph_search(gc, *r_c);
if (UNLIKELY(g == NULL)) {
g = blf_glyph_add(font, gc, FT_Get_Char_Index(font->face, *r_c), *r_c);
}
}
else {
g = NULL;
}
return g;
}
#define BLF_KERNING_VARS(_font, _has_kerning, _kern_mode) \
const bool _has_kerning = FT_HAS_KERNING((_font)->face); \
@ -353,33 +359,40 @@ static void blf_font_ensure_ascii_kerning(FontBLF *font,
FT_KERNING_UNFITTED : \
FT_KERNING_DEFAULT;
/* NOTE: `blf_font_ensure_ascii_kerning(font, gc, kern_mode);` must be called before this macro. */
BLI_INLINE void blf_kerning_step_fast(FontBLF *font,
const FT_UInt kern_mode,
const GlyphBLF *g_prev,
const GlyphBLF *g,
const uint c_prev,
const uint c,
int *pen_x_p)
{
/* `blf_font_ensure_ascii_kerning(font, gc, kern_mode);` must be called before this function. */
BLI_assert((font->kerning_mode == kern_mode) && (font->kerning_cache != NULL));
#define BLF_KERNING_STEP_FAST(_font, _kern_mode, _g_prev, _g, _c_prev, _c, _pen_x) \
{ \
if (_g_prev) { \
FT_Vector _delta; \
if (_c_prev < KERNING_CACHE_TABLE_SIZE && _c < GLYPH_ASCII_TABLE_SIZE) { \
_pen_x += (_font)->kerning_cache->table[_c][_c_prev]; \
} \
else if (FT_Get_Kerning((_font)->face, (_g_prev)->idx, (_g)->idx, _kern_mode, &(_delta)) == \
0) { \
_pen_x += (int)_delta.x >> 6; \
} \
} \
} \
(void)0
if (g_prev != NULL) {
if ((c_prev < KERNING_CACHE_TABLE_SIZE) && (c < GLYPH_ASCII_TABLE_SIZE)) {
*pen_x_p += font->kerning_cache->table[c][c_prev];
}
else {
FT_Vector delta;
if (FT_Get_Kerning(font->face, g_prev->idx, g->idx, kern_mode, &delta) == 0) {
*pen_x_p += (int)delta.x >> 6;
}
}
}
}
#define BLF_KERNING_STEP(_font, _kern_mode, _g_prev, _g, _delta, _pen_x) \
{ \
if (_g_prev) { \
_delta.x = _delta.y = 0; \
if (FT_Get_Kerning((_font)->face, (_g_prev)->idx, (_g)->idx, _kern_mode, &(_delta)) == 0) { \
_pen_x += (int)_delta.x >> 6; \
} \
} \
} \
(void)0
BLI_INLINE void blf_kerning_step(
FontBLF *font, const FT_UInt kern_mode, const GlyphBLF *g_prev, const GlyphBLF *g, int *pen_x)
{
if (g_prev != NULL) {
FT_Vector delta;
if (FT_Get_Kerning(font->face, g_prev->idx, g->idx, kern_mode, &delta) == 0) {
*pen_x += (int)delta.x >> 6;
}
}
}
static void blf_font_draw_ex(FontBLF *font,
GlyphCacheBLF *gc,
@ -405,7 +418,7 @@ static void blf_font_draw_ex(FontBLF *font,
blf_batch_draw_begin(font);
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, gc, g, str, i, c);
g = blf_utf8_next_fast(font, gc, str, &i, &c);
if (UNLIKELY(c == BLI_UTF8_ERR)) {
break;
@ -414,7 +427,7 @@ static void blf_font_draw_ex(FontBLF *font,
continue;
}
if (has_kerning) {
BLF_KERNING_STEP_FAST(font, kern_mode, g_prev, g, c_prev, c, pen_x);
blf_kerning_step_fast(font, kern_mode, g_prev, g, c_prev, c, &pen_x);
}
/* do not return this loop if clipped, we want every character tested */
@ -457,14 +470,16 @@ static void blf_font_draw_ascii_ex(
while ((c = *(str++)) && len--) {
BLI_assert(c < GLYPH_ASCII_TABLE_SIZE);
if ((g = gc->glyph_ascii_table[c]) == NULL) {
g = gc->glyph_ascii_table[c];
if (UNLIKELY(g == NULL)) {
g = blf_glyph_add(font, gc, FT_Get_Char_Index((font)->face, c), c);
if ((gc->glyph_ascii_table[c] = g) == NULL) {
gc->glyph_ascii_table[c] = g;
if (UNLIKELY(g == NULL)) {
continue;
}
}
if (has_kerning) {
BLF_KERNING_STEP_FAST(font, kern_mode, g_prev, g, c_prev, c, pen_x);
blf_kerning_step_fast(font, kern_mode, g_prev, g, c_prev, c, &pen_x);
}
/* do not return this loop if clipped, we want every character tested */
@ -504,7 +519,7 @@ int blf_font_draw_mono(FontBLF *font, const char *str, size_t len, int cwidth)
blf_batch_draw_begin(font);
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, gc, g, str, i, c);
g = blf_utf8_next_fast(font, gc, str, &i, &c);
if (UNLIKELY(c == BLI_UTF8_ERR)) {
break;
@ -559,7 +574,7 @@ static void blf_font_draw_buffer_ex(FontBLF *font,
/* another buffer specific call for color conversion */
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, gc, g, str, i, c);
g = blf_utf8_next_fast(font, gc, str, &i, &c);
if (UNLIKELY(c == BLI_UTF8_ERR)) {
break;
@ -568,7 +583,7 @@ static void blf_font_draw_buffer_ex(FontBLF *font,
continue;
}
if (has_kerning) {
BLF_KERNING_STEP_FAST(font, kern_mode, g_prev, g, c_prev, c, pen_x);
blf_kerning_step_fast(font, kern_mode, g_prev, g, c_prev, c, &pen_x);
}
chx = pen_x + ((int)g->pos[0]);
@ -699,7 +714,7 @@ static bool blf_font_width_to_strlen_glyph_process(FontBLF *font,
return false; /* continue the calling loop. */
}
if (has_kerning) {
BLF_KERNING_STEP_FAST(font, kern_mode, g_prev, g, c_prev, c, *pen_x);
blf_kerning_step_fast(font, kern_mode, g_prev, g, c_prev, c, pen_x);
}
*pen_x += g->advance_i;
@ -726,7 +741,7 @@ size_t blf_font_width_to_strlen(
for (i_prev = i = 0, width_new = pen_x = 0, g_prev = NULL, c_prev = 0; (i < len) && str[i];
i_prev = i, width_new = pen_x, c_prev = c, g_prev = g) {
BLF_UTF8_NEXT_FAST(font, gc, g, str, i, c);
g = blf_utf8_next_fast(font, gc, str, &i, &c);
if (blf_font_width_to_strlen_glyph_process(
font, has_kerning, kern_mode, c_prev, c, g_prev, g, &pen_x, width_i)) {
@ -767,7 +782,7 @@ size_t blf_font_width_to_rstrlen(
i_prev = (size_t)((s_prev != NULL) ? s_prev - str : 0);
i_tmp = i;
BLF_UTF8_NEXT_FAST(font, gc, g, str, i_tmp, c);
g = blf_utf8_next_fast(font, gc, str, &i_tmp, &c);
for (width_new = pen_x = 0; (s != NULL);
i = i_prev, s = s_prev, c = c_prev, g = g_prev, g_prev = NULL, width_new = pen_x) {
s_prev = BLI_str_find_prev_char_utf8(str, s);
@ -775,7 +790,7 @@ size_t blf_font_width_to_rstrlen(
if (s_prev != NULL) {
i_tmp = i_prev;
BLF_UTF8_NEXT_FAST(font, gc, g_prev, str, i_tmp, c_prev);
g_prev = blf_utf8_next_fast(font, gc, str, &i_tmp, &c_prev);
BLI_assert(i_tmp == i);
}
@ -817,7 +832,7 @@ static void blf_font_boundbox_ex(FontBLF *font,
blf_font_ensure_ascii_kerning(font, gc, kern_mode);
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, gc, g, str, i, c);
g = blf_utf8_next_fast(font, gc, str, &i, &c);
if (UNLIKELY(c == BLI_UTF8_ERR)) {
break;
@ -826,7 +841,7 @@ static void blf_font_boundbox_ex(FontBLF *font,
continue;
}
if (has_kerning) {
BLF_KERNING_STEP_FAST(font, kern_mode, g_prev, g, c_prev, c, pen_x);
blf_kerning_step_fast(font, kern_mode, g_prev, g, c_prev, c, &pen_x);
}
gbox.xmin = (float)pen_x;
@ -900,7 +915,6 @@ static void blf_font_wrap_apply(FontBLF *font,
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0, pen_y = 0;
size_t i = 0;
int lines = 0;
@ -922,7 +936,7 @@ static void blf_font_wrap_apply(FontBLF *font,
size_t i_curr = i;
bool do_draw = false;
BLF_UTF8_NEXT_FAST(font, gc, g, str, i, c);
g = blf_utf8_next_fast(font, gc, str, &i, &c);
if (UNLIKELY(c == BLI_UTF8_ERR)) {
break;
@ -931,7 +945,7 @@ static void blf_font_wrap_apply(FontBLF *font,
continue;
}
if (has_kerning) {
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
blf_kerning_step(font, kern_mode, g_prev, g, &pen_x);
}
/**
@ -1168,7 +1182,7 @@ static void blf_font_boundbox_foreach_glyph_ex(FontBLF *font,
while ((i < len) && str[i]) {
i_curr = i;
BLF_UTF8_NEXT_FAST(font, gc, g, str, i, c);
g = blf_utf8_next_fast(font, gc, str, &i, &c);
if (UNLIKELY(c == BLI_UTF8_ERR)) {
break;
@ -1177,7 +1191,7 @@ static void blf_font_boundbox_foreach_glyph_ex(FontBLF *font,
continue;
}
if (has_kerning) {
BLF_KERNING_STEP_FAST(font, kern_mode, g_prev, g, c_prev, c, pen_x);
blf_kerning_step_fast(font, kern_mode, g_prev, g, c_prev, c, &pen_x);
}
gbox.xmin = pen_x;