| 1 |
#include <cstdlib> |
| 2 |
#include <cstring> |
| 3 |
|
| 4 |
#include <algorithm> |
| 5 |
|
| 6 |
#include "opengl.h" |
| 7 |
#include "material.h" |
| 8 |
#include "view.h" |
| 9 |
#include "util.h" |
| 10 |
|
| 11 |
GLuint |
| 12 |
texture::load_texture (SDL_Surface * surface, GLfloat * tex2oord) |
| 13 |
{ |
| 14 |
GLuint name; |
| 15 |
SDL_Surface *image; |
| 16 |
SDL_Rect area; |
| 17 |
Uint32 saved_flags; |
| 18 |
Uint8 saved_alpha; |
| 19 |
|
| 20 |
/* Use the surface width and height expanded to powers of 2 */ |
| 21 |
tex2oord[0] = 0.F; /* Min X */ |
| 22 |
tex2oord[1] = 0.F; /* Min Y */ |
| 23 |
tex2oord[2] = 1.F; /* Max X */ |
| 24 |
tex2oord[3] = 1.F; /* Max Y */ |
| 25 |
|
| 26 |
image = SDL_CreateRGBSurface (SDL_SWSURFACE, surface->w, surface->h, 32, |
| 27 |
#if SDL_BYTEORDER == SDL_LIL_ENDIAN /* OpenGL RGBA masks */ |
| 28 |
0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 |
| 29 |
#else |
| 30 |
0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF |
| 31 |
#endif |
| 32 |
); |
| 33 |
|
| 34 |
if (image == NULL) |
| 35 |
return 0; |
| 36 |
|
| 37 |
/* Save the alpha blending attributes */ |
| 38 |
saved_flags = surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK); |
| 39 |
saved_alpha = surface->format->alpha; |
| 40 |
if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA) |
| 41 |
SDL_SetAlpha (surface, 0, 0); |
| 42 |
|
| 43 |
/* Copy the surface into the GL texture image */ |
| 44 |
area.x = 0; |
| 45 |
area.y = 0; |
| 46 |
area.w = surface->w; |
| 47 |
area.h = surface->h; |
| 48 |
SDL_BlitSurface (surface, &area, image, &area); |
| 49 |
|
| 50 |
/* Restore the alpha blending attributes */ |
| 51 |
if ((saved_flags & SDL_SRCALPHA) == SDL_SRCALPHA) |
| 52 |
SDL_SetAlpha (surface, saved_flags, saved_alpha); |
| 53 |
|
| 54 |
/* Create an OpenGL texture for the image */ |
| 55 |
glGenTextures (1, &name); |
| 56 |
glBindTexture (GL_TEXTURE_2D, name); |
| 57 |
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 58 |
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); |
| 59 |
glTexParameteri (GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE); |
| 60 |
glTexImage2D (GL_TEXTURE_2D, |
| 61 |
0, |
| 62 |
GL_RGBA, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels); |
| 63 |
SDL_FreeSurface (image); /* No longer needed */ |
| 64 |
|
| 65 |
return name; |
| 66 |
} |
| 67 |
|
| 68 |
material::~material () |
| 69 |
{ |
| 70 |
} |
| 71 |
|
| 72 |
void material::enable (view &ctx) |
| 73 |
{ |
| 74 |
pass_data::matmap_t &matmap = ctx.pass->matmap; |
| 75 |
|
| 76 |
pass_data::matmap_t::iterator i = matmap.find (this); |
| 77 |
|
| 78 |
if (i == matmap.end ()) |
| 79 |
{ |
| 80 |
string vsh_src, fsh_src; |
| 81 |
|
| 82 |
shader::shader_builder::start (); |
| 83 |
|
| 84 |
if (ctx.pass->l) |
| 85 |
ctx.pass->l->vsh (); |
| 86 |
|
| 87 |
vsh (ctx); |
| 88 |
|
| 89 |
// compute logarithmic depth - see the frustum matrix in view.C |
| 90 |
{ |
| 91 |
using namespace shader::compile; |
| 92 |
|
| 93 |
temp_1f lz; |
| 94 |
|
| 95 |
// TODO: negative z is not calculated in an acceptable way, clipping does horrible things(?) |
| 96 |
lz = z (vout.position); |
| 97 |
z (vout.position) = (ifelse ( |
| 98 |
lz < 0, |
| 99 |
lz, |
| 100 |
log (lz) * (2 / log (1e10)) |
| 101 |
) - 1) * w (vout.position); |
| 102 |
} |
| 103 |
|
| 104 |
vsh_src = shader::shader_builder::stop (); |
| 105 |
|
| 106 |
shader::shader_builder::start (); |
| 107 |
|
| 108 |
if (ctx.pass->l) |
| 109 |
{ |
| 110 |
ctx.pass->l->fsh (); |
| 111 |
|
| 112 |
fsh (ctx); |
| 113 |
} |
| 114 |
else |
| 115 |
shader::compile::fout.frag_color = shader::compile::float4 (1., 0., 1., 1.); |
| 116 |
|
| 117 |
fsh_src = shader::shader_builder::stop (); |
| 118 |
|
| 119 |
shader::program_object po = shader::get_program (vsh_src, fsh_src); |
| 120 |
matmap.insert (pass_data::matmap_t::value_type (this, po)); |
| 121 |
|
| 122 |
po->enable (); |
| 123 |
} |
| 124 |
else |
| 125 |
i->second->enable (); |
| 126 |
|
| 127 |
if (ctx.pass->l) |
| 128 |
ctx.pass->l->enable (); |
| 129 |
} |
| 130 |
|
| 131 |
void material::disable (view &ctx) |
| 132 |
{ |
| 133 |
} |
| 134 |
|
| 135 |
test_material::test_material () |
| 136 |
//: tex ("textures/osama.jpg"), texvar (tex.name) |
| 137 |
: tex ("textures/rockwall.jpg"), texvar (tex.name) |
| 138 |
, norm ("textures/rockwall_normal.jpg"), normvar (norm.name) |
| 139 |
{ |
| 140 |
} |
| 141 |
|
| 142 |
static shader::varying_3f normal; |
| 143 |
static shader::varying_2f texcoord; |
| 144 |
|
| 145 |
void test_material::vsh (view &ctx) |
| 146 |
{ |
| 147 |
using namespace shader::compile; |
| 148 |
|
| 149 |
std_vsh (); |
| 150 |
|
| 151 |
if (ctx.pass->l) |
| 152 |
{ |
| 153 |
texcoord = xy (vin.tex_coord[0]); |
| 154 |
normal = normal_matrix * vin.normal; |
| 155 |
} |
| 156 |
} |
| 157 |
|
| 158 |
void test_material::fsh (view &ctx) |
| 159 |
{ |
| 160 |
using namespace shader::compile; |
| 161 |
|
| 162 |
if (ctx.pass->l) |
| 163 |
{ |
| 164 |
temp_3f lc; |
| 165 |
temp_1f fac; |
| 166 |
|
| 167 |
temp_3f rot1, rot2, rot3; |
| 168 |
|
| 169 |
yxz (rot1) = (texture_2d (normvar, texcoord) * 2.F - 1.F); |
| 170 |
|
| 171 |
//rot1 = normal_matrix * rot1; |
| 172 |
|
| 173 |
rot2 = float3 (x(rot1), z(rot1), -y(rot1)); |
| 174 |
rot3 = float3 (y(rot1), -x(rot1), z(rot1)); |
| 175 |
|
| 176 |
normal = mat3 (rot1, rot2, rot3) * normal; |
| 177 |
|
| 178 |
fac = dot (normalize (normal), normalize (ctx.pass->l->sh_lightvec)); |
| 179 |
fac = max (pow (max (fac, 0.0), 6), 0.3); |
| 180 |
xyz (fout.frag_color) = (texture_2d (texvar, texcoord) + 0.2F) * fac |
| 181 |
* ctx.pass->l->sh_colour; |
| 182 |
//xyz (fout.frag_color) = lc * fac; |
| 183 |
} |
| 184 |
} |
| 185 |
|
| 186 |
void test_material::enable (view &ctx) |
| 187 |
{ |
| 188 |
material::enable (ctx); |
| 189 |
texvar->enable (); |
| 190 |
normvar->enable (); |
| 191 |
} |
| 192 |
|
| 193 |
void test_material::disable (view &ctx) |
| 194 |
{ |
| 195 |
normvar->disable (); |
| 196 |
texvar->disable (); |
| 197 |
material::disable (ctx); |
| 198 |
} |
| 199 |
|
| 200 |
test_material *testmat; |
| 201 |
|
