1 // SuperTuxKart - a fun racing game with go-kart
2 // Copyright (C) 2018 SuperTuxKart-Team
3 //
4 // This program is free software; you can redistribute it and/or
5 // modify it under the terms of the GNU General Public License
6 // as published by the Free Software Foundation; either version 3
7 // of the License, or (at your option) any later version.
8 //
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with this program; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17
18 #ifndef SERVER_ONLY
19
20 #include "graphics/stk_text_billboard.hpp"
21 #include "graphics/texture_shader.hpp"
22
23 #include <unordered_set>
24
25 namespace TextBillboardDrawer
26 {
27 // ----------------------------------------------------------------------------
28 std::unordered_map<video::ITexture*, std::vector<STKTextBillboard*> > g_tbs;
29 // ----------------------------------------------------------------------------
30 std::unordered_set<STKTextBillboard*> g_tbs_update;
31 // ============================================================================
32 /** A Shader to render text billboard.
33 */
34 class TBRenderer : public TextureShader<TBRenderer, 1>
35 {
36 public:
TBRenderer()37 TBRenderer()
38 {
39 loadProgram(PARTICLES_RENDERING,
40 GL_VERTEX_SHADER, "sp_pass.vert",
41 GL_FRAGMENT_SHADER, "sp_text_billboard.frag");
42 assignUniforms();
43 assignSamplerNames(0, "font_texture",
44 ST_TRILINEAR_ANISOTROPIC_FILTERED);
45 } // TBRenderer
46 }; // TBRenderer
47
48 // ============================================================================
addTextBillboard(STKTextBillboard * tb)49 void addTextBillboard(STKTextBillboard* tb)
50 {
51 g_tbs_update.insert(tb);
52 const auto& tex = tb->getAllTBTextures();
53 for (video::ITexture* t : tex)
54 {
55 g_tbs[t].push_back(tb);
56 }
57 } // addTextBillboard
58
59 // ----------------------------------------------------------------------------
drawAll()60 void drawAll()
61 {
62 if (g_tbs.empty())
63 {
64 return;
65 }
66 glEnable(GL_DEPTH_TEST);
67 glDepthMask(GL_TRUE);
68 glEnable(GL_CULL_FACE);
69 glDisable(GL_BLEND);
70 TBRenderer::getInstance()->use();
71 for (auto& p : g_tbs)
72 {
73 TBRenderer::getInstance()
74 ->setTextureUnits(p.first->getOpenGLTextureName());
75 for (auto* q : p.second)
76 {
77 q->draw(p.first);
78 }
79 }
80 } // drawAll
81
82 // ----------------------------------------------------------------------------
reset()83 void reset()
84 {
85 g_tbs.clear();
86 g_tbs_update.clear();
87 } // reset
88
89 // ----------------------------------------------------------------------------
updateAll()90 void updateAll()
91 {
92 for (STKTextBillboard* tb : g_tbs_update)
93 {
94 tb->updateGLInstanceData();
95 }
96 } // updateAll
97
98 }
99
100 #endif
101