int RenderBatchTriangle::set_batcher_active(const CanvasPtr &canvas)
{
if (use_glyph_program != false)
{
static_cast<CanvasImpl*>(canvas.get())->batcher.flush();
use_glyph_program = false;
}
if (position == 0 || position + 6 > max_vertices)
static_cast<CanvasImpl*>(canvas.get())->batcher.flush();
static_cast<CanvasImpl*>(canvas.get())->set_batcher(this);
return RenderBatchTriangle::max_textures;
}
int RenderBatchTriangle::set_batcher_active(const CanvasPtr &canvas, int num_vertices)
{
if (use_glyph_program != false)
{
static_cast<CanvasImpl*>(canvas.get())->batcher.flush();
use_glyph_program = false;
}
if (position + num_vertices > max_vertices)
static_cast<CanvasImpl*>(canvas.get())->batcher.flush();
if (num_vertices > max_vertices)
throw Exception("Too many vertices for RenderBatchTriangle");
static_cast<CanvasImpl*>(canvas.get())->set_batcher(this);
return RenderBatchTriangle::max_textures;
}
int RenderBatchTriangle::set_batcher_active(const CanvasPtr &canvas, const Texture2DPtr &texture, bool glyph_program, const Colorf &new_constant_color)
{
if (use_glyph_program != glyph_program || constant_color != new_constant_color)
{
static_cast<CanvasImpl*>(canvas.get())->batcher.flush();
use_glyph_program = glyph_program;
constant_color = new_constant_color;
}
int texindex = -1;
for (int i = 0; i < num_current_textures; i++)
{
if (current_textures[i] == texture)
{
texindex = i;
break;
}
}
if (texindex == -1 && num_current_textures < max_textures)
{
texindex = num_current_textures;
current_textures[num_current_textures++] = texture;
tex_sizes[texindex] = Sizef((float)current_textures[texindex]->width(), (float)current_textures[texindex]->height());
}
if (position == 0 || position + 6 > max_vertices || texindex == -1)
{
static_cast<CanvasImpl*>(canvas.get())->batcher.flush();
texindex = 0;
current_textures[texindex] = texture;
num_current_textures = 1;
tex_sizes[texindex] = Sizef((float)current_textures[texindex]->width(), (float)current_textures[texindex]->height());
}
static_cast<CanvasImpl*>(canvas.get())->set_batcher(this);
return texindex;
}
void Font_DrawFlat::draw_text(const CanvasPtr &canvas, const Pointf &position, const std::string &text, const Colorf &color, float line_spacing)
{
float offset_x = 0;
float offset_y = 0;
UTF8_Reader reader(text.data(), text.length());
RenderBatchTriangle *batcher = static_cast<CanvasImpl*>(canvas.get())->batcher.get_triangle_batcher();
while (!reader.is_end())
{
unsigned int glyph = reader.character();
reader.next();
if (glyph == '\n')
{
offset_x = 0;
offset_y += line_spacing;
continue;
}
Font_TextureGlyph *gptr = glyph_cache->get_glyph(canvas, font_engine, glyph);
if (gptr)
{
if (gptr->texture)
{
float xp = offset_x + position.x + gptr->offset.x;
float yp = offset_y + position.y + gptr->offset.y;
Pointf pos = canvas->grid_fit(Pointf(xp, yp));
Rectf dest_size(pos, gptr->size);
batcher->draw_image(canvas, gptr->geometry, dest_size, color, gptr->texture);
}
offset_x += gptr->metrics.advance.width;
offset_y += gptr->metrics.advance.height;
}
}
}