duc_graph *duc_graph_new_opengl(duc *duc, double font_scale)
{
duc_graph *g = duc_graph_new(duc);
g->backend = &duc_graph_backend_opengl;
struct opengl_backend_data *bd;
bd = duc_malloc(sizeof *bd);
g->backend_data = bd;
bd->sp = shaders();
bd->loc_pos = glGetAttribLocation(bd->sp, "pos_in");
bd->loc_texture = glGetAttribLocation(bd->sp, "tex_in");
bd->loc_color = glGetAttribLocation(bd->sp, "color_in");
bd->loc_sampler = glGetUniformLocation(bd->sp, "Texture");
bd->loc_matrix = glGetUniformLocation(bd->sp, "matrix");
bd->font_scale = font_scale / STB_SOMEFONT_LINE_SPACING;
unsigned char fontpixels[STB_SOMEFONT_BITMAP_HEIGHT][STB_SOMEFONT_BITMAP_WIDTH];
STB_SOMEFONT_CREATE(bd->fontdata, fontpixels, STB_SOMEFONT_BITMAP_HEIGHT);
glGenTextures(1, &bd->font_texid);
glBindTexture(GL_TEXTURE_2D, bd->font_texid);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, STB_SOMEFONT_BITMAP_WIDTH, STB_SOMEFONT_BITMAP_HEIGHT, 0, GL_ALPHA, GL_UNSIGNED_BYTE, fontpixels );
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glGenerateMipmap(GL_TEXTURE_2D);
return g;
}
duc_graph *duc_graph_new_cairo(duc *duc, cairo_t *cr)
{
duc_graph *g = duc_graph_new(duc);
g->backend = &duc_graph_backend_cairo;
struct cairo_backend_data *bd;
bd = duc_malloc(sizeof *bd);
g->backend_data = bd;
bd->cr = cr;
return g;
}
duc_graph *duc_graph_new_cairo_file(duc *duc, duc_graph_file_format fmt, FILE *fout)
{
duc_graph *g = duc_graph_new(duc);
g->backend = &duc_graph_backend_file;
struct cairo_backend_data *bd;
bd = duc_malloc(sizeof *bd);
g->backend_data = bd;
bd->fmt = fmt;
bd->fout = fout;
return g;
}
duc_graph *duc_graph_new_html(duc *duc, FILE *fout, int write_body)
{
duc_graph *g = duc_graph_new(duc);
g->backend = &duc_graph_backend_html;
struct html_backend_data *bd;
bd = duc_malloc(sizeof *bd);
g->backend_data = bd;
bd->fout = fout;
bd->write_body = write_body;
return g;
}
