/* faster version of blf_font_draw, ascii only for view dimensions */
void blf_font_draw_ascii(FontBLF *font, const char *str, size_t len)
{
unsigned char c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0, pen_y = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
blf_font_ensure_ascii_table(font);
while ((c = *(str++)) && len--) {
BLI_assert(c < 128);
if ((g = glyph_ascii_table[c]) == NULL)
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
/* do not return this loop if clipped, we want every character tested */
blf_glyph_render(font, g, (float)pen_x, (float)pen_y);
pen_x += g->advance_i;
g_prev = g;
}
}
/* use fixed column width, but an utf8 character may occupy multiple columns */
int blf_font_draw_mono(FontBLF *font, const char *str, size_t len, int cwidth)
{
unsigned int c;
GlyphBLF *g;
int col, columns = 0;
int pen_x = 0, pen_y = 0;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
blf_font_ensure_ascii_table(font);
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
/* do not return this loop if clipped, we want every character tested */
blf_glyph_render(font, g, (float)pen_x, (float)pen_y);
col = BLI_wcwidth((wchar_t)c);
if (col < 0)
col = 1;
columns += col;
pen_x += cwidth * col;
}
return columns;
}
void blf_font_draw(FontBLF *font, const char *str, size_t len)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0, pen_y = 0;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
blf_font_ensure_ascii_table(font);
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
/* do not return this loop if clipped, we want every character tested */
blf_glyph_render(font, g, (float)pen_x, (float)pen_y);
pen_x += g->advance_i;
g_prev = g;
}
}
static void blf_font_boundbox_ex(
FontBLF *font, const char *str, size_t len, rctf *box, struct ResultBLF *r_info,
int pen_y)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
rctf gbox;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
box->xmin = 32000.0f;
box->xmax = -32000.0f;
box->ymin = 32000.0f;
box->ymax = -32000.0f;
blf_font_ensure_ascii_table(font);
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
gbox.xmin = (float)pen_x;
gbox.xmax = (float)pen_x + g->advance;
gbox.ymin = g->box.ymin + (float)pen_y;
gbox.ymax = g->box.ymax + (float)pen_y;
if (gbox.xmin < box->xmin) box->xmin = gbox.xmin;
if (gbox.ymin < box->ymin) box->ymin = gbox.ymin;
if (gbox.xmax > box->xmax) box->xmax = gbox.xmax;
if (gbox.ymax > box->ymax) box->ymax = gbox.ymax;
pen_x += g->advance_i;
g_prev = g;
}
if (box->xmin > box->xmax) {
box->xmin = 0.0f;
box->ymin = 0.0f;
box->xmax = 0.0f;
box->ymax = 0.0f;
}
if (r_info) {
r_info->lines = 1;
r_info->width = pen_x;
}
}
void blf_font_boundbox(FontBLF *font, const char *str, rctf *box)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0, pen_y = 0;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
rctf gbox;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
box->xmin = 32000.0f;
box->xmax = -32000.0f;
box->ymin = 32000.0f;
box->ymax = -32000.0f;
blf_font_ensure_ascii_table(font);
while (str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (c == BLI_UTF8_ERR)
break;
if (g == NULL)
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
gbox.xmin = pen_x;
gbox.xmax = pen_x + g->advance;
gbox.ymin = g->box.ymin + pen_y;
gbox.ymax = g->box.ymax + pen_y;
if (gbox.xmin < box->xmin) box->xmin = gbox.xmin;
if (gbox.ymin < box->ymin) box->ymin = gbox.ymin;
if (gbox.xmax > box->xmax) box->xmax = gbox.xmax;
if (gbox.ymax > box->ymax) box->ymax = gbox.ymax;
pen_x += g->advance;
g_prev = g;
}
if (box->xmin > box->xmax) {
box->xmin = 0.0f;
box->ymin = 0.0f;
box->xmax = 0.0f;
box->ymax = 0.0f;
}
}
size_t blf_font_width_to_strlen(FontBLF *font, const char *str, size_t len, float width, float *r_width)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0;
size_t i = 0, i_prev;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
const int width_i = (int)width + 1;
int width_new;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
blf_font_ensure_ascii_table(font);
while ((void)(i_prev = i),
(void)(width_new = pen_x),
((i < len) && str[i]))
{
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
pen_x += g->advance_i;
if (width_i < pen_x) {
break;
}
g_prev = g;
}
if (r_width) {
*r_width = (float)width_new;
}
return i_prev;
}
size_t blf_font_width_to_rstrlen(FontBLF *font, const char *str, size_t len, float width, float *r_width)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0;
size_t i = 0, i_prev;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
const int width_i = (int)width + 1;
int width_new;
bool is_malloc;
int (*width_accum)[2];
int width_accum_ofs = 0;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
/* skip allocs in simple cases */
len = BLI_strnlen(str, len);
if (width_i <= 1 || len == 0) {
if (r_width) {
*r_width = 0.0f;
}
return len;
}
if (len < 2048) {
width_accum = BLI_array_alloca(width_accum, len);
is_malloc = false;
}
else {
width_accum = MEM_mallocN(sizeof(*width_accum) * len, __func__);
is_malloc = true;
}
blf_font_ensure_ascii_table(font);
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
pen_x += g->advance_i;
width_accum[width_accum_ofs][0] = (int)i;
width_accum[width_accum_ofs][1] = pen_x;
width_accum_ofs++;
g_prev = g;
}
if (pen_x > width_i && width_accum_ofs != 0) {
const int min_x = pen_x - width_i;
/* search backwards */
width_new = pen_x;
while (width_accum_ofs-- > 0) {
if (min_x > width_accum[width_accum_ofs][1]) {
break;
}
}
width_accum_ofs++;
width_new = pen_x - width_accum[width_accum_ofs][1];
i_prev = (size_t)width_accum[width_accum_ofs][0];
}
else {
width_new = pen_x;
i_prev = 0;
}
if (is_malloc) {
MEM_freeN(width_accum);
}
if (r_width) {
*r_width = (float)width_new;
}
return i_prev;
}
/* Sanity checks are done by BLF_draw_buffer() */
void blf_font_buffer(FontBLF *font, const char *str)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = (int)font->pos[0], pen_y = 0;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
/* buffer specific vars */
FontBufInfoBLF *buf_info = &font->buf_info;
float b_col_float[4];
const unsigned char b_col_char[4] = {
(unsigned char)(buf_info->col[0] * 255),
(unsigned char)(buf_info->col[1] * 255),
(unsigned char)(buf_info->col[2] * 255),
(unsigned char)(buf_info->col[3] * 255)};
unsigned char *cbuf;
int chx, chy;
int y, x;
float a, *fbuf;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
blf_font_ensure_ascii_table(font);
/* another buffer specific call for color conversion */
if (buf_info->display) {
copy_v4_v4(b_col_float, buf_info->col);
IMB_colormanagement_display_to_scene_linear_v3(b_col_float, buf_info->display);
}
else {
srgb_to_linearrgb_v4(b_col_float, buf_info->col);
}
while (str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
chx = pen_x + ((int)g->pos_x);
chy = (int)font->pos[1] + g->height;
if (g->pitch < 0) {
pen_y = (int)font->pos[1] + (g->height - (int)g->pos_y);
}
else {
pen_y = (int)font->pos[1] - (g->height - (int)g->pos_y);
}
if ((chx + g->width) >= 0 && chx < buf_info->w && (pen_y + g->height) >= 0 && pen_y < buf_info->h) {
/* don't draw beyond the buffer bounds */
int width_clip = g->width;
int height_clip = g->height;
int yb_start = g->pitch < 0 ? 0 : g->height - 1;
if (width_clip + chx > buf_info->w)
width_clip -= chx + width_clip - buf_info->w;
if (height_clip + pen_y > buf_info->h)
height_clip -= pen_y + height_clip - buf_info->h;
/* drawing below the image? */
if (pen_y < 0) {
yb_start += (g->pitch < 0) ? -pen_y : pen_y;
height_clip += pen_y;
pen_y = 0;
}
if (buf_info->fbuf) {
int yb = yb_start;
for (y = ((chy >= 0) ? 0 : -chy); y < height_clip; y++) {
for (x = ((chx >= 0) ? 0 : -chx); x < width_clip; x++) {
a = *(g->bitmap + x + (yb * g->pitch)) / 255.0f;
if (a > 0.0f) {
float alphatest;
fbuf = buf_info->fbuf + buf_info->ch * ((chx + x) + ((pen_y + y) * buf_info->w));
if (a >= 1.0f) {
fbuf[0] = b_col_float[0];
fbuf[1] = b_col_float[1];
fbuf[2] = b_col_float[2];
fbuf[3] = (alphatest = (fbuf[3] + (b_col_float[3]))) < 1.0f ? alphatest : 1.0f;
}
else {
fbuf[0] = (b_col_float[0] * a) + (fbuf[0] * (1.0f - a));
fbuf[1] = (b_col_float[1] * a) + (fbuf[1] * (1.0f - a));
fbuf[2] = (b_col_float[2] * a) + (fbuf[2] * (1.0f - a));
fbuf[3] = (alphatest = (fbuf[3] + (b_col_float[3] * a))) < 1.0f ? alphatest : 1.0f;
}
}
}
if (g->pitch < 0)
yb++;
else
yb--;
}
}
if (buf_info->cbuf) {
int yb = yb_start;
for (y = 0; y < height_clip; y++) {
for (x = 0; x < width_clip; x++) {
a = *(g->bitmap + x + (yb * g->pitch)) / 255.0f;
if (a > 0.0f) {
int alphatest;
cbuf = buf_info->cbuf + buf_info->ch * ((chx + x) + ((pen_y + y) * buf_info->w));
if (a >= 1.0f) {
cbuf[0] = b_col_char[0];
cbuf[1] = b_col_char[1];
cbuf[2] = b_col_char[2];
alphatest = (int)cbuf[3] + (int)b_col_char[3];
if (alphatest < 255) {
cbuf[3] = (unsigned char)(alphatest);
}
else {
cbuf[3] = 255;
}
}
else {
cbuf[0] = (unsigned char)((b_col_char[0] * a) + (cbuf[0] * (1.0f - a)));
cbuf[1] = (unsigned char)((b_col_char[1] * a) + (cbuf[1] * (1.0f - a)));
cbuf[2] = (unsigned char)((b_col_char[2] * a) + (cbuf[2] * (1.0f - a)));
alphatest = ((int)cbuf[3] + (int)((b_col_float[3] * a) * 255.0f));
if (alphatest < 255) {
cbuf[3] = (unsigned char)(alphatest);
}
else {
cbuf[3] = 255;
}
}
}
}
if (g->pitch < 0)
yb++;
else
yb--;
}
}
}
pen_x += g->advance_i;
g_prev = g;
}
}
/**
* Generic function to add word-wrap support for other existing functions.
*
* Wraps on spaces and respects newlines.
* Intentionally ignores non-unix newlines, tabs and more advanced text formatting.
*
* \note If we want rich text - we better have a higher level API to handle that
* (color, bold, switching fonts... etc).
*/
static void blf_font_wrap_apply(
FontBLF *font, const char *str, size_t len, struct ResultBLF *r_info,
void (*callback)(FontBLF *font, const char *str, size_t len, int pen_y, void *userdata),
void *userdata)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = 0, pen_y = 0;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
int lines = 0;
int pen_x_next = 0;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
struct WordWrapVars {
int wrap_width;
size_t start, last[2];
} wrap = {font->wrap_width != -1 ? font->wrap_width : INT_MAX, 0, {0, 0}};
blf_font_ensure_ascii_table(font);
// printf("%s wrapping (%d, %d) `%s`:\n", __func__, len, strlen(str), str);
while ((i < len) && str[i]) {
/* wrap vars */
size_t i_curr = i;
bool do_draw = false;
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
/**
* Implementation Detail (utf8).
*
* Take care with single byte offsets here,
* since this is utf8 we can't be sure a single byte is a single character.
*
* This is _only_ done when we know for sure the character is ascii (newline or a space).
*/
pen_x_next = pen_x + g->advance_i;
if (UNLIKELY((pen_x_next >= wrap.wrap_width) && (wrap.start != wrap.last[0]))) {
do_draw = true;
}
else if (UNLIKELY(((i < len) && str[i]) == 0)) {
/* need check here for trailing newline, else we draw it */
wrap.last[0] = i + ((g->c != '\n') ? 1 : 0);
wrap.last[1] = i;
do_draw = true;
}
else if (UNLIKELY(g->c == '\n')) {
wrap.last[0] = i_curr + 1;
wrap.last[1] = i;
do_draw = true;
}
else if (UNLIKELY(g->c != ' ' && (g_prev ? g_prev->c == ' ' : false))) {
wrap.last[0] = i_curr;
wrap.last[1] = i_curr;
}
if (UNLIKELY(do_draw)) {
// printf("(%03d..%03d) `%.*s`\n",
// wrap.start, wrap.last[0], (wrap.last[0] - wrap.start) - 1, &str[wrap.start]);
callback(font, &str[wrap.start], (wrap.last[0] - wrap.start) - 1, pen_y, userdata);
wrap.start = wrap.last[0];
i = wrap.last[1];
pen_x = 0;
pen_y -= font->glyph_cache->glyph_height_max;
g_prev = NULL;
lines += 1;
continue;
}
pen_x = pen_x_next;
g_prev = g;
}
// printf("done! lines: %d, width, %d\n", lines, pen_x_next);
if (r_info) {
r_info->lines = lines;
/* width of last line only (with wrapped lines) */
r_info->width = pen_x_next;
}
}
/* Sanity checks are done by BLF_draw_buffer() */
static void blf_font_draw_buffer_ex(
FontBLF *font, const char *str, size_t len, struct ResultBLF *r_info,
int pen_y)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = (int)font->pos[0];
int pen_y_basis = (int)font->pos[1] + pen_y;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
/* buffer specific vars */
FontBufInfoBLF *buf_info = &font->buf_info;
const float *b_col_float = buf_info->col_float;
const unsigned char *b_col_char = buf_info->col_char;
int chx, chy;
int y, x;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
blf_font_ensure_ascii_table(font);
/* another buffer specific call for color conversion */
while ((i < len) && str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (UNLIKELY(c == BLI_UTF8_ERR))
break;
if (UNLIKELY(g == NULL))
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
chx = pen_x + ((int)g->pos_x);
chy = pen_y_basis + g->height;
if (g->pitch < 0) {
pen_y = pen_y_basis + (g->height - (int)g->pos_y);
}
else {
pen_y = pen_y_basis - (g->height - (int)g->pos_y);
}
if ((chx + g->width) >= 0 && chx < buf_info->w && (pen_y + g->height) >= 0 && pen_y < buf_info->h) {
/* don't draw beyond the buffer bounds */
int width_clip = g->width;
int height_clip = g->height;
int yb_start = g->pitch < 0 ? 0 : g->height - 1;
if (width_clip + chx > buf_info->w)
width_clip -= chx + width_clip - buf_info->w;
if (height_clip + pen_y > buf_info->h)
height_clip -= pen_y + height_clip - buf_info->h;
/* drawing below the image? */
if (pen_y < 0) {
yb_start += (g->pitch < 0) ? -pen_y : pen_y;
height_clip += pen_y;
pen_y = 0;
}
if (buf_info->fbuf) {
int yb = yb_start;
for (y = ((chy >= 0) ? 0 : -chy); y < height_clip; y++) {
for (x = ((chx >= 0) ? 0 : -chx); x < width_clip; x++) {
const char a_byte = *(g->bitmap + x + (yb * g->pitch));
if (a_byte) {
const float a = (a_byte / 255.0f) * b_col_float[3];
const size_t buf_ofs = (
((size_t)(chx + x) + ((size_t)(pen_y + y) * (size_t)buf_info->w)) *
(size_t)buf_info->ch);
float *fbuf = buf_info->fbuf + buf_ofs;
if (a >= 1.0f) {
fbuf[0] = b_col_float[0];
fbuf[1] = b_col_float[1];
fbuf[2] = b_col_float[2];
fbuf[3] = 1.0f;
}
else {
fbuf[0] = (b_col_float[0] * a) + (fbuf[0] * (1.0f - a));
fbuf[1] = (b_col_float[1] * a) + (fbuf[1] * (1.0f - a));
fbuf[2] = (b_col_float[2] * a) + (fbuf[2] * (1.0f - a));
fbuf[3] = MIN2(fbuf[3] + a, 1.0f); /* clamp to 1.0 */
}
}
}
if (g->pitch < 0)
yb++;
else
yb--;
}
}
if (buf_info->cbuf) {
int yb = yb_start;
for (y = ((chy >= 0) ? 0 : -chy); y < height_clip; y++) {
for (x = ((chx >= 0) ? 0 : -chx); x < width_clip; x++) {
const char a_byte = *(g->bitmap + x + (yb * g->pitch));
if (a_byte) {
const float a = (a_byte / 255.0f) * b_col_float[3];
const size_t buf_ofs = (
((size_t)(chx + x) + ((size_t)(pen_y + y) * (size_t)buf_info->w)) *
(size_t)buf_info->ch);
unsigned char *cbuf = buf_info->cbuf + buf_ofs;
if (a >= 1.0f) {
cbuf[0] = b_col_char[0];
cbuf[1] = b_col_char[1];
cbuf[2] = b_col_char[2];
cbuf[3] = 255;
}
else {
cbuf[0] = (unsigned char)((b_col_char[0] * a) + (cbuf[0] * (1.0f - a)));
cbuf[1] = (unsigned char)((b_col_char[1] * a) + (cbuf[1] * (1.0f - a)));
cbuf[2] = (unsigned char)((b_col_char[2] * a) + (cbuf[2] * (1.0f - a)));
cbuf[3] = (unsigned char)MIN2((int)cbuf[3] + (int)(a * 255), 255); /* clamp to 255 */
}
}
}
if (g->pitch < 0)
yb++;
else
yb--;
}
}
}
pen_x += g->advance_i;
g_prev = g;
}
if (r_info) {
r_info->lines = 1;
r_info->width = pen_x;
}
}
/* Sanity checks are done by BLF_draw_buffer() */
void blf_font_buffer(FontBLF *font, const char *str)
{
unsigned int c;
GlyphBLF *g, *g_prev = NULL;
FT_Vector delta;
int pen_x = (int)font->pos[0], pen_y = 0;
size_t i = 0;
GlyphBLF **glyph_ascii_table = font->glyph_cache->glyph_ascii_table;
/* buffer specific vars*/
const unsigned char b_col_char[4] = {font->b_col[0] * 255,
font->b_col[1] * 255,
font->b_col[2] * 255,
font->b_col[3] * 255};
unsigned char *cbuf;
int chx, chy;
int y, x;
float a, *fbuf;
BLF_KERNING_VARS(font, has_kerning, kern_mode);
blf_font_ensure_ascii_table(font);
while (str[i]) {
BLF_UTF8_NEXT_FAST(font, g, str, i, c, glyph_ascii_table);
if (c == BLI_UTF8_ERR)
break;
if (g == NULL)
continue;
if (has_kerning)
BLF_KERNING_STEP(font, kern_mode, g_prev, g, delta, pen_x);
chx = pen_x + ((int)g->pos_x);
chy = (int)font->pos[1] + g->height;
if (g->pitch < 0) {
pen_y = (int)font->pos[1] + (g->height - (int)g->pos_y);
}
else {
pen_y = (int)font->pos[1] - (g->height - (int)g->pos_y);
}
if ((chx + g->width) >= 0 && chx < font->bw && (pen_y + g->height) >= 0 && pen_y < font->bh) {
/* don't draw beyond the buffer bounds */
int width_clip = g->width;
int height_clip = g->height;
int yb_start = g->pitch < 0 ? 0 : g->height - 1;
if (width_clip + chx > font->bw)
width_clip -= chx + width_clip - font->bw;
if (height_clip + pen_y > font->bh)
height_clip -= pen_y + height_clip - font->bh;
/* drawing below the image? */
if (pen_y < 0) {
yb_start += (g->pitch < 0) ? -pen_y : pen_y;
height_clip += pen_y;
pen_y = 0;
}
if (font->b_fbuf) {
int yb = yb_start;
for (y = ((chy >= 0) ? 0 : -chy); y < height_clip; y++) {
for (x = ((chx >= 0) ? 0 : -chx); x < width_clip; x++) {
a = *(g->bitmap + x + (yb * g->pitch)) / 255.0f;
if (a > 0.0f) {
float alphatest;
fbuf = font->b_fbuf + font->bch * ((chx + x) + ((pen_y + y) * font->bw));
if (a >= 1.0f) {
fbuf[0] = font->b_col[0];
fbuf[1] = font->b_col[1];
fbuf[2] = font->b_col[2];
fbuf[3] = (alphatest = (fbuf[3] + (font->b_col[3]))) < 1.0f ? alphatest : 1.0f;
}
else {
fbuf[0] = (font->b_col[0] * a) + (fbuf[0] * (1 - a));
fbuf[1] = (font->b_col[1] * a) + (fbuf[1] * (1 - a));
fbuf[2] = (font->b_col[2] * a) + (fbuf[2] * (1 - a));
fbuf[3] = (alphatest = (fbuf[3] + (font->b_col[3] * a))) < 1.0f ? alphatest : 1.0f;
}
}
}
if (g->pitch < 0)
yb++;
else
yb--;
}
}
if (font->b_cbuf) {
int yb = yb_start;
for (y = 0; y < height_clip; y++) {
for (x = 0; x < width_clip; x++) {
a = *(g->bitmap + x + (yb * g->pitch)) / 255.0f;
if (a > 0.0f) {
int alphatest;
cbuf = font->b_cbuf + font->bch * ((chx + x) + ((pen_y + y) * font->bw));
if (a >= 1.0f) {
cbuf[0] = b_col_char[0];
cbuf[1] = b_col_char[1];
cbuf[2] = b_col_char[2];
cbuf[3] = (alphatest = ((int)cbuf[3] + (int)b_col_char[3])) < 255 ? alphatest : 255;
}
else {
cbuf[0] = (b_col_char[0] * a) + (cbuf[0] * (1 - a));
cbuf[1] = (b_col_char[1] * a) + (cbuf[1] * (1 - a));
cbuf[2] = (b_col_char[2] * a) + (cbuf[2] * (1 - a));
cbuf[3] = (alphatest = ((int)cbuf[3] + (int)((font->b_col[3] * a) * 255.0f))) <
255 ? alphatest : 255;
}
}
}
if (g->pitch < 0)
yb++;
else
yb--;
}
}
}
pen_x += g->advance;
g_prev = g;
}
}
