195695/xorg.i.4

   1 typedef int GLint;
   2 typedef unsigned int GLuint;
   3 typedef float GLfloat;
   4 static void fxt1_encode(void);
   5 static void texstore_rgba_fxt1(void)
   6 {
   7         fxt1_encode();
   8 }
   9
  10 structfoo = {
  11 texstore_rgba_fxt1};
  12 typedef unsigned long long Fx64;
  13 static void fxt1_quantize_ALPHA1(void)
  14 {
  15         GLuint *cc;
  16         const GLint n_vect = 3;
  17         const GLint n_comp = 4;
  18         GLfloat vec[1 + 1 + 1][4];
  19         GLint i, j, k;
  20         Fx64 hi;
  21         GLint j1, j2;
  22         GLint v1 = 0, v2 = 0;
  23         GLfloat err = 1e9;
  24         GLfloat tv[2 * 2][4];
  25         for (j1 = 0; j1 < 2; j1++) {
  26                 for (j2 = 2; j2 < 4; j2++) {
  27                         GLfloat e = 0.0F;
  28                         for (i = 0; i < n_comp; i++) {
  29                                 e += (tv[j1][i] - tv[j2][i]) * (tv[j1][i] -
  30                                                                 tv[j2][i]);
  31                         }
  32                         if (e < err) {
  33                                 v1 = j1;
  34                         }
  35                 }
  36         }
  37         for (i = 0; i < n_comp; i++) {
  38                 vec[0][i] = tv[1 - v1][i];
  39         }
  40         for (j = n_vect - 1; j >= 0; j--) {
  41                 for (i = 0; i < n_comp - 1; i++) {
  42                         hi |= (GLuint) (vec[j][i] / 8.0F);
  43                 }
  44         }
  45         ((Fx64 *) cc)[1] = hi;
  46 }
  47 static void fxt1_quantize(void)
  48 {
  49         GLint k;
  50         for (k = 0; k < 4; k++)
  51                 fxt1_quantize_ALPHA1();
  52 }
  53 static void fxt1_encode(void)
  54 {
  55         fxt1_quantize();
  56 }