// ----------------------------------------------------------------------------
void
text_buffer_add_wchar( text_buffer_t * self,
vec2 * pen, markup_t * markup,
wchar_t current, wchar_t previous )
{
size_t vcount = 0;
size_t icount = 0;
vertex_buffer_t * buffer = self->buffer;
texture_font_t * font = markup->font;
float gamma = markup->gamma;
// Maximum number of vertices is 20 (= 5x2 triangles) per glyph:
// - 2 triangles for background
// - 2 triangles for overline
// - 2 triangles for underline
// - 2 triangles for strikethrough
// - 2 triangles for glyph
glyph_vertex_t vertices[4*5];
GLuint indices[6*5];
texture_glyph_t *glyph;
texture_glyph_t *black;
float kerning = 0;
if( current == L'\n' )
{
pen->x = self->origin.x;
pen->y += self->line_descender;
self->line_descender = 0;
self->line_ascender = 0;
self->line_start = vector_size( self->buffer->items );
return;
}
if( markup->font->ascender > self->line_ascender )
{
float y = pen->y;
pen->y -= (markup->font->ascender - self->line_ascender);
text_buffer_move_last_line( self, (int)(y-pen->y) );
self->line_ascender = markup->font->ascender;
}
if( markup->font->descender < self->line_descender )
{
self->line_descender = markup->font->descender;
}
glyph = texture_font_get_glyph( font, current );
black = texture_font_get_glyph( font, -1 );
if( glyph == NULL )
{
return;
}
if( previous && markup->font->kerning )
{
kerning = texture_glyph_get_kerning( glyph, previous );
}
pen->x += kerning;
// Background
if( markup->background_color.alpha > 0 )
{
float r = markup->background_color.r;
float g = markup->background_color.g;
float b = markup->background_color.b;
float a = markup->background_color.a;
float x0 = ( pen->x -kerning );
float y0 = (int)( pen->y + font->descender );
float x1 = ( x0 + glyph->advance_x );
float y1 = (int)( y0 + font->height + font->linegap );
float s0 = black->s0;
float t0 = black->t0;
float s1 = black->s1;
float t1 = black->t1;
SET_GLYPH_VERTEX(vertices[vcount+0],
(int)x0,y0,0, s0,t0, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+1],
(int)x0,y1,0, s0,t1, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+2],
(int)x1,y1,0, s1,t1, r,g,b,a, x1-((int)x1), gamma );
SET_GLYPH_VERTEX(vertices[vcount+3],
(int)x1,y0,0, s1,t0, r,g,b,a, x1-((int)x1), gamma );
indices[icount + 0] = vcount+0;
indices[icount + 1] = vcount+1;
indices[icount + 2] = vcount+2;
indices[icount + 3] = vcount+0;
indices[icount + 4] = vcount+2;
indices[icount + 5] = vcount+3;
vcount += 4;
icount += 6;
}
// Underline
if( markup->underline )
{
float r = markup->underline_color.r;
float g = markup->underline_color.g;
float b = markup->underline_color.b;
float a = markup->underline_color.a;
float x0 = ( pen->x - kerning );
float y0 = (int)( pen->y + font->underline_position );
float x1 = ( x0 + glyph->advance_x );
float y1 = (int)( y0 + font->underline_thickness );
float s0 = black->s0;
float t0 = black->t0;
float s1 = black->s1;
float t1 = black->t1;
SET_GLYPH_VERTEX(vertices[vcount+0],
(int)x0,y0,0, s0,t0, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+1],
(int)x0,y1,0, s0,t1, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+2],
(int)x1,y1,0, s1,t1, r,g,b,a, x1-((int)x1), gamma );
SET_GLYPH_VERTEX(vertices[vcount+3],
(int)x1,y0,0, s1,t0, r,g,b,a, x1-((int)x1), gamma );
indices[icount + 0] = vcount+0;
indices[icount + 1] = vcount+1;
indices[icount + 2] = vcount+2;
indices[icount + 3] = vcount+0;
indices[icount + 4] = vcount+2;
indices[icount + 5] = vcount+3;
vcount += 4;
icount += 6;
}
// Overline
if( markup->overline )
{
float r = markup->overline_color.r;
float g = markup->overline_color.g;
float b = markup->overline_color.b;
float a = markup->overline_color.a;
float x0 = ( pen->x -kerning );
float y0 = (int)( pen->y + (int)font->ascender );
float x1 = ( x0 + glyph->advance_x );
float y1 = (int)( y0 + (int)font->underline_thickness );
float s0 = black->s0;
float t0 = black->t0;
float s1 = black->s1;
float t1 = black->t1;
SET_GLYPH_VERTEX(vertices[vcount+0],
(int)x0,y0,0, s0,t0, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+1],
(int)x0,y1,0, s0,t1, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+2],
(int)x1,y1,0, s1,t1, r,g,b,a, x1-((int)x1), gamma );
SET_GLYPH_VERTEX(vertices[vcount+3],
(int)x1,y0,0, s1,t0, r,g,b,a, x1-((int)x1), gamma );
indices[icount + 0] = vcount+0;
indices[icount + 1] = vcount+1;
indices[icount + 2] = vcount+2;
indices[icount + 3] = vcount+0;
indices[icount + 4] = vcount+2;
indices[icount + 5] = vcount+3;
vcount += 4;
icount += 6;
}
/* Strikethrough */
if( markup->strikethrough )
{
float r = markup->strikethrough_color.r;
float g = markup->strikethrough_color.g;
float b = markup->strikethrough_color.b;
float a = markup->strikethrough_color.a;
float x0 = ( pen->x -kerning );
float y0 = (int)( pen->y + (int)font->ascender*.33);
float x1 = ( x0 + glyph->advance_x );
float y1 = (int)( y0 + (int)font->underline_thickness );
float s0 = black->s0;
float t0 = black->t0;
float s1 = black->s1;
float t1 = black->t1;
SET_GLYPH_VERTEX(vertices[vcount+0],
(int)x0,y0,0, s0,t0, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+1],
(int)x0,y1,0, s0,t1, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+2],
(int)x1,y1,0, s1,t1, r,g,b,a, x1-((int)x1), gamma );
SET_GLYPH_VERTEX(vertices[vcount+3],
(int)x1,y0,0, s1,t0, r,g,b,a, x1-((int)x1), gamma );
indices[icount + 0] = vcount+0;
indices[icount + 1] = vcount+1;
indices[icount + 2] = vcount+2;
indices[icount + 3] = vcount+0;
indices[icount + 4] = vcount+2;
indices[icount + 5] = vcount+3;
vcount += 4;
icount += 6;
}
{
// Actual glyph
float r = markup->foreground_color.red;
float g = markup->foreground_color.green;
float b = markup->foreground_color.blue;
float a = markup->foreground_color.alpha;
float x0 = ( pen->x + glyph->offset_x );
float y0 = (int)( pen->y + glyph->offset_y );
float x1 = ( x0 + glyph->width );
float y1 = (int)( y0 - glyph->height );
float s0 = glyph->s0;
float t0 = glyph->t0;
float s1 = glyph->s1;
float t1 = glyph->t1;
SET_GLYPH_VERTEX(vertices[vcount+0],
(int)x0,y0,0, s0,t0, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+1],
(int)x0,y1,0, s0,t1, r,g,b,a, x0-((int)x0), gamma );
SET_GLYPH_VERTEX(vertices[vcount+2],
(int)x1,y1,0, s1,t1, r,g,b,a, x1-((int)x1), gamma );
SET_GLYPH_VERTEX(vertices[vcount+3],
(int)x1,y0,0, s1,t0, r,g,b,a, x1-((int)x1), gamma );
indices[icount + 0] = vcount+0;
indices[icount + 1] = vcount+1;
indices[icount + 2] = vcount+2;
indices[icount + 3] = vcount+0;
indices[icount + 4] = vcount+2;
indices[icount + 5] = vcount+3;
vcount += 4;
icount += 6;
vertex_buffer_push_back( buffer, vertices, vcount, indices, icount );
pen->x += glyph->advance_x * (1.0 + markup->spacing);
}
}
int xpl_text_buffer_add_wchar(xpl_text_buffer_t *self, xvec2 *pen, xpl_markup_t *markup, wchar_t current, wchar_t previous) {
assert(self);
assert(pen);
assert(markup);
assert(current);
// indices moved forward by this because all share the same vbo
size_t voffset = self->vertex_count;
size_t vcount = 0;
size_t icount = 0;
xpl_font_t *font = markup->font;
float gamma = markup->gamma;
// Maximum number of vertices is 20 (= 5x2 triangles) per glyph:
// - 2 triangles for background
// - 2 triangles for overline
// - 2 triangles for underline
// - 2 triangles for strikethrough
// - 2 triangles for glyph
glyph_vertex_t vertices[4 * 5];
GLushort indices[6 * 5]; // two shared vertices per triangle
if (current == L'\n') {
pen->x = self->pen_origin.x;
if (previous == L'\n') {
// No line descender for this line, so make something up
pen->y -= markup->font->height * 1.1f;
} else {
pen->y -= self->line_descender + markup->font->height;
}
self->line_descender = 0.0f;
self->line_ascender = 0.0f;
self->line_start = self->vertex_count;
return FALSE;
}
if (markup->font->ascender > self->line_ascender) {
float y = pen->y;
pen->y -= markup->font->ascender - self->line_ascender;
text_buffer_move_last_line(self, (int)(y - pen->y));
self->line_ascender = markup->font->ascender;
}
if (markup->font->descender < self->line_descender) {
self->line_descender = xmin(markup->font->descender, self->line_descender);
}
xpl_glyph_t *glyph = xpl_font_get_glyph(font, current);
if (! glyph) {
LOG_WARN("Glyph %c not found", current);
return FALSE;
}
xpl_glyph_t *empty = xpl_font_get_glyph(font, -1);
float kerning = 0.0f;
if (previous > 0) {
kerning = xpl_font_glyph_get_kerning(glyph, previous);
pen->x += kerning;
}
if (markup->background_color.alpha > 0) {
float r = markup->background_color.r;
float g = markup->background_color.g;
float b = markup->background_color.b;
float a = markup->background_color.a;
float x0 = pen->x - kerning;
float y0 = (float)(int)(pen->y + font->descender);
float x1 = x0 + glyph->advance_x;
float y1 = (float)(int)(y0 + font->height + font->linegap);
float s0 = empty->tex_s0;
float t0 = empty->tex_t0;
float s1 = empty->tex_s1;
float t1 = empty->tex_t1;
SET_GLYPH_VERTEX(vertices[vcount + 0], (int)x0, y0, 0, s0, t0, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 1], (int)x0, y1, 0, s0, t1, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 2], (int)x1, y1, 0, s1, t1, r, g, b, a, x1 - ((int)x1), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 3], (int)x1, y0, 0, s1, t0, r, g, b, a, x1 - ((int)x1), gamma);
indices[icount + 0] = voffset + vcount + 0;
indices[icount + 1] = voffset + vcount + 1;
indices[icount + 2] = voffset + vcount + 2;
indices[icount + 3] = voffset + vcount + 0;
indices[icount + 4] = voffset + vcount + 2;
indices[icount + 5] = voffset + vcount + 3;
vcount += 4;
icount += 6;
}
if (markup->underline) {
float r = markup->underline_color.r;
float g = markup->underline_color.g;
float b = markup->underline_color.b;
float a = markup->underline_color.a;
float x0 = pen->x - kerning;
float y0 = (float)(int)(pen->y + font->underscore_position);
float x1 = x0 + glyph->advance_x;
float y1 = (float)(int)(y0 + font->underscore_thickness);
float s0 = empty->tex_s0;
float t0 = empty->tex_t0;
float s1 = empty->tex_s1;
float t1 = empty->tex_t1;
SET_GLYPH_VERTEX(vertices[vcount + 0], (int)x0, y0, 0, s0, t0, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 1], (int)x0, y1, 0, s0, t1, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 2], (int)x1, y1, 0, s1, t1, r, g, b, a, x1 - ((int)x1), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 3], (int)x1, y0, 0, s1, t0, r, g, b, a, x1 - ((int)x1), gamma);
indices[icount + 0] = voffset + vcount + 0;
indices[icount + 1] = voffset + vcount + 1;
indices[icount + 2] = voffset + vcount + 2;
indices[icount + 3] = voffset + vcount + 0;
indices[icount + 4] = voffset + vcount + 2;
indices[icount + 5] = voffset + vcount + 3;
vcount += 4;
icount += 6;
}
if (markup->overline) {
float r = markup->overline_color.r;
float g = markup->overline_color.g;
float b = markup->overline_color.b;
float a = markup->overline_color.a;
float x0 = pen->x - kerning;
float y0 = (float)(int)(pen->y + (int)font->ascender);
float x1 = x0 + glyph->advance_x;
float y1 = (float)(int)(y0 + (int)font->underscore_thickness);
float s0 = empty->tex_s0;
float t0 = empty->tex_t0;
float s1 = empty->tex_s1;
float t1 = empty->tex_t1;
SET_GLYPH_VERTEX(vertices[vcount + 0], (int)x0, y0, 0, s0, t0, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 1], (int)x0, y1, 0, s0, t1, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 2], (int)x1, y1, 0, s1, t1, r, g, b, a, x1 - ((int)x1), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 3], (int)x1, y0, 0, s1, t0, r, g, b, a, x1 - ((int)x1), gamma);
indices[icount + 0] = voffset + vcount + 0;
indices[icount + 1] = voffset + vcount + 1;
indices[icount + 2] = voffset + vcount + 2;
indices[icount + 3] = voffset + vcount + 0;
indices[icount + 4] = voffset + vcount + 2;
indices[icount + 5] = voffset + vcount + 3;
vcount += 4;
icount += 6;
}
if (markup->strikethrough) {
float r = markup->strikethrough_color.r;
float g = markup->strikethrough_color.g;
float b = markup->strikethrough_color.b;
float a = markup->strikethrough_color.a;
float x0 = pen->x - kerning;
float y0 = (float)(int)(pen->y + (int)(0.33f * font->ascender));
float x1 = x0 + glyph->advance_x;
float y1 = (float)(int)(y0 + (int)font->underscore_thickness);
float s0 = empty->tex_s0;
float t0 = empty->tex_t0;
float s1 = empty->tex_s1;
float t1 = empty->tex_t1;
SET_GLYPH_VERTEX(vertices[vcount + 0], x0, y0, 0, s0, t0, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 1], x0, y1, 0, s0, t1, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 2], x1, y1, 0, s1, t1, r, g, b, a, x1 - ((int)x1), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 3], x1, y0, 0, s1, t0, r, g, b, a, x1 - ((int)x1), gamma);
indices[icount + 0] = voffset + vcount + 0;
indices[icount + 1] = voffset + vcount + 1;
indices[icount + 2] = voffset + vcount + 2;
indices[icount + 3] = voffset + vcount + 0;
indices[icount + 4] = voffset + vcount + 2;
indices[icount + 5] = voffset + vcount + 3;
vcount += 4;
icount += 6;
}
// HOOORAY, IT'S THE GLYPH!
// Watch, I'll never use strikeline or overthrough
{
float r = markup->foreground_color.r;
float g = markup->foreground_color.g;
float b = markup->foreground_color.b;
float a = markup->foreground_color.a;
float x0 = pen->x + glyph->offset_x;
float y0 = (float)(int)(pen->y + glyph->offset_y);
float x1 = x0 + glyph->width;
float y1 = (float)(int)(y0 - glyph->height);
float s0 = glyph->tex_s0;
float t0 = glyph->tex_t0;
float s1 = glyph->tex_s1;
float t1 = glyph->tex_t1;
SET_GLYPH_VERTEX(vertices[vcount + 0], x0, y0, 0, s0, t0, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 1], x0, y1, 0, s0, t1, r, g, b, a, x0 - ((int)x0), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 2], x1, y1, 0, s1, t1, r, g, b, a, x1 - ((int)x1), gamma);
SET_GLYPH_VERTEX(vertices[vcount + 3], x1, y0, 0, s1, t0, r, g, b, a, x1 - ((int)x1), gamma);
indices[icount + 0] = voffset + vcount + 0;
indices[icount + 1] = voffset + vcount + 1;
indices[icount + 2] = voffset + vcount + 2;
indices[icount + 3] = voffset + vcount + 0;
indices[icount + 4] = voffset + vcount + 2;
indices[icount + 5] = voffset + vcount + 3;
vcount += 4;
icount += 6;
LOG_TRACE("Adding character %lc: (%f,%f):(%f,%f)", current, x0, y0, x1, y1);
}
xpl_bo_append(self->vertices, vertices, vcount * sizeof (glyph_vertex_t));
xpl_bo_append(self->vao->index_bos[0], indices, icount * sizeof (GLushort));
# if 0
LOG_DEBUG("Index buffer content: ")
GLushort *val;
size_t elements = self->vao->index_bos[0]->client_data->length / sizeof (GLushort);
for (size_t i = 0; i < elements; i++) {
val = ((GLushort *)self->vao->index_bos[0]->client_data->content) + i;
LOG_DEBUG("%hu", *val);
}
# endif
self->vertex_count += vcount;
self->index_count += icount;
pen->x += glyph->advance_x * (1.0f + markup->spacing);
return TRUE;
}
