static void gl_raster_font_render_message(
gl_raster_t *font, const char *msg, GLfloat scale,
const GLfloat color[4], GLfloat pos_x, GLfloat pos_y,
unsigned text_align)
{
int x, y, delta_x, delta_y;
float inv_tex_size_x, inv_tex_size_y, inv_win_width, inv_win_height;
unsigned i, msg_len_full, msg_len;
GLfloat font_tex_coords[2 * 6 * MAX_MSG_LEN_CHUNK];
GLfloat font_vertex[2 * 6 * MAX_MSG_LEN_CHUNK];
GLfloat font_color[4 * 6 * MAX_MSG_LEN_CHUNK];
GLfloat font_lut_tex_coord[2 * 6 * MAX_MSG_LEN_CHUNK];
struct gl_coords coords;
gl_t *gl = font ? font->gl : NULL;
if (!gl)
return;
msg_len_full = strlen(msg);
msg_len = min(msg_len_full, MAX_MSG_LEN_CHUNK);
x = roundf(pos_x * gl->vp.width);
y = roundf(pos_y * gl->vp.height);
delta_x = 0;
delta_y = 0;
switch (text_align)
{
case TEXT_ALIGN_RIGHT:
x -= gl_get_message_width(font, msg, scale);
break;
case TEXT_ALIGN_CENTER:
x -= gl_get_message_width(font, msg, scale) / 2.0;
break;
}
inv_tex_size_x = 1.0f / font->tex_width;
inv_tex_size_y = 1.0f / font->tex_height;
inv_win_width = 1.0f / font->gl->vp.width;
inv_win_height = 1.0f / font->gl->vp.height;
while (msg_len_full)
{
for (i = 0; i < msg_len; i++)
{
int off_x, off_y, tex_x, tex_y, width, height;
const struct font_glyph *glyph =
font->font_driver->get_glyph(font->font_data, (uint8_t)msg[i]);
if (!glyph) /* Do something smarter here ... */
glyph = font->font_driver->get_glyph(font->font_data, '?');
if (!glyph)
continue;
off_x = glyph->draw_offset_x;
off_y = glyph->draw_offset_y;
tex_x = glyph->atlas_offset_x;
tex_y = glyph->atlas_offset_y;
width = glyph->width;
height = glyph->height;
gl_raster_font_emit(0, 0, 1); /* Bottom-left */
gl_raster_font_emit(1, 1, 1); /* Bottom-right */
gl_raster_font_emit(2, 0, 0); /* Top-left */
gl_raster_font_emit(3, 1, 0); /* Top-right */
gl_raster_font_emit(4, 0, 0); /* Top-left */
gl_raster_font_emit(5, 1, 1); /* Bottom-right */
delta_x += glyph->advance_x;
delta_y -= glyph->advance_y;
}
coords.tex_coord = font_tex_coords;
coords.vertex = font_vertex;
coords.color = font_color;
coords.vertices = 6 * msg_len;
coords.lut_tex_coord = font_lut_tex_coord;
if (font->block)
gl_coord_array_add(&font->block->carr, &coords, coords.vertices);
else
gl_raster_font_draw_vertices(gl, &coords);
msg_len_full -= msg_len;
msg += msg_len;
msg_len = min(msg_len_full, MAX_MSG_LEN_CHUNK);
}
}
static void gl_raster_font_render_line(
gl_raster_t *font, const char *msg, unsigned msg_len,
GLfloat scale, const GLfloat color[4], GLfloat pos_x,
GLfloat pos_y, unsigned text_align)
{
int x, y, delta_x, delta_y;
unsigned i;
struct video_coords coords;
float inv_tex_size_x, inv_tex_size_y, inv_win_width, inv_win_height;
GLfloat font_tex_coords[2 * 6 * MAX_MSG_LEN_CHUNK];
GLfloat font_vertex[2 * 6 * MAX_MSG_LEN_CHUNK];
GLfloat font_color[4 * 6 * MAX_MSG_LEN_CHUNK];
GLfloat font_lut_tex_coord[2 * 6 * MAX_MSG_LEN_CHUNK];
gl_t *gl = font ? font->gl : NULL;
const char* msg_end = msg + msg_len;
if (!gl)
return;
x = roundf(pos_x * gl->vp.width);
y = roundf(pos_y * gl->vp.height);
delta_x = 0;
delta_y = 0;
switch (text_align)
{
case TEXT_ALIGN_RIGHT:
x -= gl_get_message_width(font, msg, msg_len, scale);
break;
case TEXT_ALIGN_CENTER:
x -= gl_get_message_width(font, msg, msg_len, scale) / 2.0;
break;
}
inv_tex_size_x = 1.0f / font->tex_width;
inv_tex_size_y = 1.0f / font->tex_height;
inv_win_width = 1.0f / font->gl->vp.width;
inv_win_height = 1.0f / font->gl->vp.height;
while (msg < msg_end)
{
i = 0;
while ((i < MAX_MSG_LEN_CHUNK) && (msg < msg_end))
{
int off_x, off_y, tex_x, tex_y, width, height;
unsigned code = utf8_walk(&msg);
const struct font_glyph *glyph = font->font_driver->get_glyph(
font->font_data, code);
if (!glyph) /* Do something smarter here ... */
glyph = font->font_driver->get_glyph(font->font_data, '?');
if (!glyph)
continue;
off_x = glyph->draw_offset_x;
off_y = glyph->draw_offset_y;
tex_x = glyph->atlas_offset_x;
tex_y = glyph->atlas_offset_y;
width = glyph->width;
height = glyph->height;
gl_raster_font_emit(0, 0, 1); /* Bottom-left */
gl_raster_font_emit(1, 1, 1); /* Bottom-right */
gl_raster_font_emit(2, 0, 0); /* Top-left */
gl_raster_font_emit(3, 1, 0); /* Top-right */
gl_raster_font_emit(4, 0, 0); /* Top-left */
gl_raster_font_emit(5, 1, 1); /* Bottom-right */
i++;
delta_x += glyph->advance_x;
delta_y -= glyph->advance_y;
}
coords.tex_coord = font_tex_coords;
coords.vertex = font_vertex;
coords.color = font_color;
coords.vertices = i * 6;
coords.lut_tex_coord = font_lut_tex_coord;
if (font->block)
video_coord_array_append(&font->block->carr, &coords, coords.vertices);
else
gl_raster_font_draw_vertices(font, &coords);
}
}