I think my codes did same work.
#SelectExpand
1void RocketSDLRenderInterfaceOpenGL::RenderGeometry(Rocket::Core::Vertex* vertices,
2 int num_vertices,
3 int* indices,
4 int num_indices,
5 const Rocket::Core::TextureHandle texture,
6 const Rocket::Core::Vector2f& translation) {
7 glPushMatrix();
8 glTranslatef(translation.x, translation.y, 0);
9
10 std::vector<Rocket::Core::Vector2f> Positions(num_vertices);
11 std::vector<Rocket::Core::Colourb> Colors(num_vertices);
12 std::vector<Rocket::Core::Vector2f> TexCoords(num_vertices);
13 float texw, texh;
14
15 SDL_Texture* sdl_texture = NULL;
16 if(texture) {
17 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
18 sdl_texture = (SDL_Texture *) texture;
19 SDL_GL_BindTexture(sdl_texture, &texw, &texh);
20 }
21
22 for(int i = 0; i < num_vertices; i++) {
23 Positions[i] = vertices[i].position;
24 Colors[i] = vertices[i].colour;
25 if (sdl_texture) {
26 TexCoords[i].x = vertices[i].tex_coord.x * texw;
27 TexCoords[i].y = vertices[i].tex_coord.y * texh;
28 }
29 else {
30 TexCoords[i] = vertices[i].tex_coord;
31 }
32 }
33
34 glEnableClientState(GL_VERTEX_ARRAY);
35 glEnableClientState(GL_COLOR_ARRAY);
36 glVertexPointer(2, GL_FLOAT, 0, &Positions[0]);
37 glColorPointer(4, GL_UNSIGNED_BYTE, 0, &Colors[0]);
38 glTexCoordPointer(2, GL_FLOAT, 0, &TexCoords[0]);
39
40 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
41 glEnable(GL_BLEND);
42 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
43 glDrawElements(GL_TRIANGLES, num_indices, GL_UNSIGNED_INT, indices);
44 glDisableClientState(GL_VERTEX_ARRAY);
45 glDisableClientState(GL_COLOR_ARRAY);
46
47
48 if (sdl_texture) {
49 SDL_GL_UnbindTexture(sdl_texture);
50 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
51 }
52
53 glColor4f(1.0, 1.0, 1.0, 1.0);
54 glPopMatrix();
55}
