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/cvs/libgender/material.C
Revision: 1.38
Committed: Fri Nov 5 04:08:23 2004 UTC (19 years, 7 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.37: +6 -0 lines
Log Message:
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File Contents

# User Rev Content
1 root 1.8 #include <cstdlib>
2     #include <cstring>
3    
4 root 1.9 #include <algorithm>
5    
6 root 1.13 #include "opengl.h"
7     #include "material.h"
8 root 1.18 #include "view.h"
9 root 1.13 #include "util.h"
10    
11 root 1.1 material::~material ()
12     {
13     }
14    
15 root 1.6 GLuint
16     texture::load_texture (SDL_Surface * surface, GLfloat * tex2oord)
17 root 1.3 {
18 root 1.15 GLuint name;
19 root 1.3 SDL_Surface *image;
20     SDL_Rect area;
21     Uint32 saved_flags;
22     Uint8 saved_alpha;
23    
24     /* Use the surface width and height expanded to powers of 2 */
25 root 1.19 tex2oord[0] = 0.F; /* Min X */
26     tex2oord[1] = 0.F; /* Min Y */
27     tex2oord[2] = 1.F; /* Max X */
28     tex2oord[3] = 1.F; /* Max Y */
29 root 1.3
30 root 1.19 image = SDL_CreateRGBSurface (SDL_SWSURFACE, surface->w, surface->h, 32,
31 root 1.3 #if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */
32     0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000
33     #else
34     0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF
35     #endif
36     );
37 root 1.6
38 root 1.3 if (image == NULL)
39 root 1.6 return 0;
40 root 1.3
41     /* Save the alpha blending attributes */
42     saved_flags = surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK);
43     saved_alpha = surface->format->alpha;
44     if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA)
45 root 1.6 SDL_SetAlpha (surface, 0, 0);
46 root 1.3
47     /* Copy the surface into the GL texture image */
48     area.x = 0;
49     area.y = 0;
50     area.w = surface->w;
51     area.h = surface->h;
52     SDL_BlitSurface (surface, &area, image, &area);
53    
54     /* Restore the alpha blending attributes */
55     if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA)
56 root 1.6 SDL_SetAlpha (surface, saved_flags, saved_alpha);
57 root 1.3
58     /* Create an OpenGL texture for the image */
59 root 1.15 glGenTextures (1, &name);
60     glBindTexture (GL_TEXTURE_2D, name);
61 root 1.6 glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
62     glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
63 root 1.15 glTexParameteri (GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
64 root 1.3 glTexImage2D (GL_TEXTURE_2D,
65     0,
66 root 1.19 GL_RGBA, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels);
67 root 1.3 SDL_FreeSurface (image); /* No longer needed */
68    
69 root 1.15 return name;
70     }
71    
72 root 1.32 void material::enable (view &ctx)
73     {
74     pass::matmap_t &matmap = ctx.pass_data->matmap;
75    
76     pass::matmap_t::iterator i = matmap.find (this);
77     shader::program_object *p;
78    
79     if (i == matmap.end ())
80     {
81     shader::program_object po;
82    
83     shader::shader_builder::start ();
84     vsh (ctx);
85    
86     if (ctx.pass_data->l)
87     ctx.pass_data->l->vsh ();
88    
89 root 1.38 {
90     using namespace shader::compile;
91    
92     z (vout.position) = log2 (z (vout.position) / w (vout.position)) * w (vout.position);
93     }
94    
95 root 1.32 po->vsh->compile (shader::shader_builder::stop ());
96    
97     shader::shader_builder::start ();
98 root 1.33 shader::compile::fout.frag_color = shader::compile::float4 (1., 1., 0., 1.);
99 root 1.32 fsh (ctx);
100     po->fsh->compile (shader::shader_builder::stop ());
101    
102     po->link ();
103    
104     matmap.insert (pass::matmap_t::value_type (this, po));
105    
106     p = &po;
107     }
108     else
109     p = &i->second;
110    
111     (*p)->enable ();
112     }
113    
114     void material::disable (view &ctx)
115     {
116     }
117    
118 root 1.15 test_material::test_material ()
119 root 1.23 //: tex ("textures/osama.jpg"), texvar (tex.name)
120 root 1.24 : tex ("textures/rockwall.jpg"), texvar (tex.name)
121 root 1.35 , norm ("textures/rockwall_normal.jpg"), normvar (norm.name)
122 root 1.15 {
123 root 1.32 }
124    
125     static shader::varying_3f normal, lightvec;
126     static shader::varying_2f texcoord;
127    
128     void test_material::vsh (view &ctx)
129     {
130 root 1.20 using namespace shader::compile;
131 root 1.15
132 root 1.32 std_vsh ();
133 root 1.15
134 root 1.32 if (ctx.pass_data->l)
135     {
136     texcoord = xy (vin.tex_coord[0]);
137     normal = normal_matrix * vin.normal;
138     lightvec = xyz (ctx.pass_data->l->lightpos - model_view_matrix * vin.vertex);
139     }
140     }
141    
142     void test_material::fsh (view &ctx)
143     {
144     using namespace shader::compile;
145 root 1.15
146 root 1.32 if (ctx.pass_data->l)
147     {
148     temp_3f lc;
149     temp_1f fac;
150    
151     lc = (*ctx.pass_data->l)();
152    
153 root 1.35 temp_3f rot1, rot2, rot3;
154    
155 root 1.37 yxz (rot1) = (texture_2d (normvar, texcoord) * 2.F - 1.F);
156    
157     //rot1 = normal_matrix * rot1;
158    
159 root 1.36 rot2 = float3 (x(rot1), z(rot1), -y(rot1));
160     rot3 = float3 (y(rot1), -x(rot1), z(rot1));
161 root 1.35
162     normal = mat3 (rot1, rot2, rot3) * normal;
163    
164 root 1.32 fac = dot (normalize (normal), normalize (lightvec));
165 root 1.37 fac = max (pow (max (fac, 0.0), 6), 0.3);
166 root 1.35 xyz (fout.frag_color) = (texture_2d (texvar, texcoord) + 0.2F) * lc * fac;
167 root 1.37 //xyz (fout.frag_color) = lc * fac;
168 root 1.32 }
169 root 1.3 }
170    
171 root 1.18 void test_material::enable (view &ctx)
172 root 1.15 {
173 root 1.32 material::enable (ctx);
174 root 1.15 texvar->enable ();
175 root 1.23 normvar->enable ();
176 root 1.15 }
177 root 1.3
178 root 1.18 void test_material::disable (view &ctx)
179 root 1.6 {
180 root 1.23 normvar->disable ();
181 root 1.15 texvar->disable ();
182 root 1.32 material::disable (ctx);
183 root 1.3 }
184 root 1.8
185 root 1.34 test_material *testmat;
186