| 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 |
material::~material () |
| 12 |
{ |
| 13 |
} |
| 14 |
|
| 15 |
GLuint |
| 16 |
texture::load_texture (SDL_Surface * surface, GLfloat * tex2oord) |
| 17 |
{ |
| 18 |
GLuint name; |
| 19 |
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 |
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 |
|
| 30 |
image = SDL_CreateRGBSurface (SDL_SWSURFACE, surface->w, surface->h, 32, |
| 31 |
#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 |
|
| 38 |
if (image == NULL) |
| 39 |
return 0; |
| 40 |
|
| 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 |
SDL_SetAlpha (surface, 0, 0); |
| 46 |
|
| 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 |
SDL_SetAlpha (surface, saved_flags, saved_alpha); |
| 57 |
|
| 58 |
/* Create an OpenGL texture for the image */ |
| 59 |
glGenTextures (1, &name); |
| 60 |
glBindTexture (GL_TEXTURE_2D, name); |
| 61 |
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 62 |
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); |
| 63 |
glTexParameteri (GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE); |
| 64 |
glTexImage2D (GL_TEXTURE_2D, |
| 65 |
0, |
| 66 |
GL_RGBA, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels); |
| 67 |
SDL_FreeSurface (image); /* No longer needed */ |
| 68 |
|
| 69 |
return name; |
| 70 |
} |
| 71 |
|
| 72 |
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 |
po->vsh->compile (shader::shader_builder::stop ()); |
| 90 |
|
| 91 |
shader::shader_builder::start (); |
| 92 |
shader::compile::fout.frag_color = shader::compile::float4 (1., 1., 0., 1.); |
| 93 |
fsh (ctx); |
| 94 |
po->fsh->compile (shader::shader_builder::stop ()); |
| 95 |
|
| 96 |
po->link (); |
| 97 |
|
| 98 |
matmap.insert (pass::matmap_t::value_type (this, po)); |
| 99 |
|
| 100 |
p = &po; |
| 101 |
} |
| 102 |
else |
| 103 |
p = &i->second; |
| 104 |
|
| 105 |
(*p)->enable (); |
| 106 |
} |
| 107 |
|
| 108 |
void material::disable (view &ctx) |
| 109 |
{ |
| 110 |
} |
| 111 |
|
| 112 |
test_material::test_material () |
| 113 |
//: tex ("textures/osama.jpg"), texvar (tex.name) |
| 114 |
: tex ("textures/rockwall.jpg"), texvar (tex.name) |
| 115 |
, norm ("textures/rockwall_height.jpg"), normvar (norm.name) |
| 116 |
{ |
| 117 |
} |
| 118 |
|
| 119 |
static shader::varying_3f normal, lightvec; |
| 120 |
static shader::varying_2f texcoord; |
| 121 |
|
| 122 |
void test_material::vsh (view &ctx) |
| 123 |
{ |
| 124 |
using namespace shader::compile; |
| 125 |
|
| 126 |
std_vsh (); |
| 127 |
|
| 128 |
if (ctx.pass_data->l) |
| 129 |
{ |
| 130 |
texcoord = xy (vin.tex_coord[0]); |
| 131 |
normal = normal_matrix * vin.normal; |
| 132 |
lightvec = xyz (ctx.pass_data->l->lightpos - model_view_matrix * vin.vertex); |
| 133 |
} |
| 134 |
} |
| 135 |
|
| 136 |
void test_material::fsh (view &ctx) |
| 137 |
{ |
| 138 |
using namespace shader::compile; |
| 139 |
|
| 140 |
if (ctx.pass_data->l) |
| 141 |
{ |
| 142 |
temp_3f lc; |
| 143 |
temp_1f fac; |
| 144 |
|
| 145 |
lc = (*ctx.pass_data->l)(); |
| 146 |
|
| 147 |
fac = dot (normalize (normal), normalize (lightvec)); |
| 148 |
fac = pow (max (fac, 0.0), 2); |
| 149 |
xyz (fout.frag_color) = texture_2d (texvar, texcoord) * lc * fac; |
| 150 |
} |
| 151 |
} |
| 152 |
|
| 153 |
void test_material::enable (view &ctx) |
| 154 |
{ |
| 155 |
material::enable (ctx); |
| 156 |
texvar->enable (); |
| 157 |
normvar->enable (); |
| 158 |
} |
| 159 |
|
| 160 |
void test_material::disable (view &ctx) |
| 161 |
{ |
| 162 |
normvar->disable (); |
| 163 |
texvar->disable (); |
| 164 |
material::disable (ctx); |
| 165 |
} |
| 166 |
|
| 167 |
test_material testmat; |
