shaders/model_font.h

   1 #ifndef SHADER_model_font_H
   2 #define SHADER_model_font_H
   3 static void shader_model_font_link(void);
   4 static void shader_model_font_register(void);
   5 static struct vg_shader _shader_model_font = {
   6    .name = "model_font",
   7    .link = shader_model_font_link,
   8    .vs =
   9 {
  10 .orig_file = "shaders/model_font.vs",
  11 .static_src =
  12 "layout (location=0) in vec3 a_co;\n"
  13 "layout (location=1) in vec3 a_norm;\n"
  14 "layout (location=2) in vec2 a_uv;\n"
  15 "\n"
  16 "#line       1        1 \n"
  17 "const float k_motion_lerp_amount = 0.01;\n"
  18 "\n"
  19 "#line      2        0 \n"
  20 "\n"
  21 "out vec3 aMotionVec0;\n"
  22 "out vec3 aMotionVec1;\n"
  23 "\n"
  24 "void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
  25 "{\n"
  26 "   // This magically solves some artifacting errors!\n"
  27 "   //\n"
  28 "   vproj1 = vproj0*(1.0-k_motion_lerp_amount) + vproj1*k_motion_lerp_amount;\n"
  29 "\n"
  30 "   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
  31 "   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
  32 "}\n"
  33 "\n"
  34 "#line      6        0 \n"
  35 "\n"
  36 "uniform mat4x3 uMdl;\n"
  37 "uniform mat4 uPv;\n"
  38 "uniform mat4 uPvmPrev;\n"
  39 "uniform vec4 uOffset;\n"
  40 "\n"
  41 "out vec2 aUv;\n"
  42 "out vec4 aNorm;\n"
  43 "out vec3 aCo;\n"
  44 "out vec3 aWorldCo;\n"
  45 "\n"
  46 "void main()\n"
  47 "{\n"
  48 "   vec3 co = a_co*uOffset.w+uOffset.xyz;\n"
  49 "   vec3 world_pos0 = uMdl     * vec4( co, 1.0 );\n"
  50 "   vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );\n"
  51 "   vec4 vproj1     = uPvmPrev * vec4( co, 1.0 );\n"
  52 "\n"
  53 "   vs_motion_out( vproj0, vproj1 );\n"
  54 "\n"
  55 "   gl_Position = vproj0;\n"
  56 "\n"
  57 "   aUv = a_uv;\n"
  58 "   aNorm = vec4( mat3(uMdl) * a_norm, 0.0 );\n"
  59 "   aCo = co;\n"
  60 "   aWorldCo = world_pos0;\n"
  61 "}\n"
  62 ""},
  63    .fs =
  64 {
  65 .orig_file = "shaders/model_font.fs",
  66 .static_src =
  67 "layout (location = 0) out vec4 oColour;\n"
  68 "\n"
  69 "uniform sampler2D uTexMain;\n"
  70 "uniform vec4 uColour;\n"
  71 "\n"
  72 "in vec2 aUv;\n"
  73 "in vec4 aNorm;\n"
  74 "in vec3 aCo;\n"
  75 "\n"
  76 "#line       1        1 \n"
  77 "const float k_motion_lerp_amount = 0.01;\n"
  78 "\n"
  79 "#line      2        0 \n"
  80 "\n"
  81 "layout (location = 1) out vec2 oMotionVec;\n"
  82 "\n"
  83 "in vec3 aMotionVec0;\n"
  84 "in vec3 aMotionVec1;\n"
  85 "\n"
  86 "void compute_motion_vectors()\n"
  87 "{\n"
  88 "   // Write motion vectors\n"
  89 "   vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
  90 "   vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
  91 "\n"
  92 "   oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
  93 "}\n"
  94 "\n"
  95 "#line     11        0 \n"
  96 "#line       1        2 \n"
  97 "uniform sampler2D uTexSceneDepth;\n"
  98 "uniform vec3 uInverseRatioDepth;\n"
  99 "uniform vec3 uInverseRatioMain;\n"
 100 "uniform bool uDepthCompare;\n"
 101 "\n"
 102 "float linear_depth( float depth, float near, float far ) {\n"
 103 "   float z = depth * 2.0 - 1.0;\n"
 104 "   return (2.0 * near * far) / (far + near - z * (far - near));        \n"
 105 "}\n"
 106 "\n"
 107 "void depth_compare_dither(){\n"
 108 "   if( uDepthCompare ){\n"
 109 "      vec2 back_coord = gl_FragCoord.xy * uInverseRatioMain.xy \n"
 110 "                                        * uInverseRatioDepth.xy;\n"
 111 "      float back_depth = texture( uTexSceneDepth, back_coord ).r;\n"
 112 "      float front_depth = gl_FragCoord.z/gl_FragCoord.w;\n"
 113 "\n"
 114 "      back_depth = linear_depth( back_depth, 0.1, 2100.0 );\n"
 115 "      float diff = back_depth - front_depth;\n"
 116 "\n"
 117 "      vec2 ssuv = gl_FragCoord.xy;\n"
 118 "      vec3 vDither = vec3( dot( vec2( 171.0, 231.0 ), ssuv) );\n"
 119 "      float dither = fract( vDither.g / 71.0 ) - 0.5;\n"
 120 "\n"
 121 "      if( step(0.0,diff)+dither<0.3 )\n"
 122 "         discard;\n"
 123 "   }\n"
 124 "}\n"
 125 "\n"
 126 "#line     12        0 \n"
 127 "\n"
 128 "void main(){\n"
 129 "   depth_compare_dither();\n"
 130 "   compute_motion_vectors();\n"
 131 "   oColour = texture( uTexMain, aUv ) * uColour;\n"
 132 "}\n"
 133 ""},
 134 };
 135
 136 static GLuint _uniform_model_font_uMdl;
 137 static GLuint _uniform_model_font_uPv;
 138 static GLuint _uniform_model_font_uPvmPrev;
 139 static GLuint _uniform_model_font_uOffset;
 140 static GLuint _uniform_model_font_uTexMain;
 141 static GLuint _uniform_model_font_uColour;
 142 static GLuint _uniform_model_font_uTexSceneDepth;
 143 static GLuint _uniform_model_font_uInverseRatioDepth;
 144 static GLuint _uniform_model_font_uInverseRatioMain;
 145 static GLuint _uniform_model_font_uDepthCompare;
 146 static void shader_model_font_uMdl(m4x3f m){
 147    glUniformMatrix4x3fv(_uniform_model_font_uMdl,1,GL_FALSE,(float*)m);
 148 }
 149 static void shader_model_font_uPv(m4x4f m){
 150    glUniformMatrix4fv(_uniform_model_font_uPv,1,GL_FALSE,(float*)m);
 151 }
 152 static void shader_model_font_uPvmPrev(m4x4f m){
 153    glUniformMatrix4fv(_uniform_model_font_uPvmPrev,1,GL_FALSE,(float*)m);
 154 }
 155 static void shader_model_font_uOffset(v4f v){
 156    glUniform4fv(_uniform_model_font_uOffset,1,v);
 157 }
 158 static void shader_model_font_uTexMain(int i){
 159    glUniform1i(_uniform_model_font_uTexMain,i);
 160 }
 161 static void shader_model_font_uColour(v4f v){
 162    glUniform4fv(_uniform_model_font_uColour,1,v);
 163 }
 164 static void shader_model_font_uTexSceneDepth(int i){
 165    glUniform1i(_uniform_model_font_uTexSceneDepth,i);
 166 }
 167 static void shader_model_font_uInverseRatioDepth(v3f v){
 168    glUniform3fv(_uniform_model_font_uInverseRatioDepth,1,v);
 169 }
 170 static void shader_model_font_uInverseRatioMain(v3f v){
 171    glUniform3fv(_uniform_model_font_uInverseRatioMain,1,v);
 172 }
 173 static void shader_model_font_uDepthCompare(int b){
 174    glUniform1i(_uniform_model_font_uDepthCompare,b);
 175 }
 176 static void shader_model_font_register(void){
 177    vg_shader_register( &_shader_model_font );
 178 }
 179 static void shader_model_font_use(void){ glUseProgram(_shader_model_font.id); }
 180 static void shader_model_font_link(void){
 181    _uniform_model_font_uMdl = glGetUniformLocation( _shader_model_font.id, "uMdl" );
 182    _uniform_model_font_uPv = glGetUniformLocation( _shader_model_font.id, "uPv" );
 183    _uniform_model_font_uPvmPrev = glGetUniformLocation( _shader_model_font.id, "uPvmPrev" );
 184    _uniform_model_font_uOffset = glGetUniformLocation( _shader_model_font.id, "uOffset" );
 185    _uniform_model_font_uTexMain = glGetUniformLocation( _shader_model_font.id, "uTexMain" );
 186    _uniform_model_font_uColour = glGetUniformLocation( _shader_model_font.id, "uColour" );
 187    _uniform_model_font_uTexSceneDepth = glGetUniformLocation( _shader_model_font.id, "uTexSceneDepth" );
 188    _uniform_model_font_uInverseRatioDepth = glGetUniformLocation( _shader_model_font.id, "uInverseRatioDepth" );
 189    _uniform_model_font_uInverseRatioMain = glGetUniformLocation( _shader_model_font.id, "uInverseRatioMain" );
 190    _uniform_model_font_uDepthCompare = glGetUniformLocation( _shader_model_font.id, "uDepthCompare" );
 191 }
 192 #endif /* SHADER_model_font_H */