progs/tests: Add mipmap_comp for mipmap testing with compressed textures

1 files changed, 295 insertions, 0 deletions

diff --git a/progs/tests/mipmap_comp.c b/progs/tests/mipmap_comp.c
new file mode 100644
index 00000000000..5842e2b8805
--- /dev/null
+++ b/progs/tests/mipmap_comp.c
@@ -0,0 +1,295 @@
+/* Copyright (c) Mark J. Kilgard, 1994. */
+/*
+ * (c) Copyright 1993, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission.
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * US Government Users Restricted Rights
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States.  Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+ */
+
+/* mipmap_comp
+ * Test compressed texture mipmaps
+ *
+ * Based on mipmap_limits
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define SIZE 16 /* not larger then 16 */
+
+static GLint BaseLevel = 0, MaxLevel = 9;
+static GLfloat MinLod = -1, MaxLod = 9;
+static GLfloat LodBias = 0.0;
+static GLboolean NearestFilter = GL_TRUE;
+static GLuint texImage;
+
+
+static void
+initValues(void)
+{
+   BaseLevel = 0;
+   MaxLevel = 9;
+   MinLod = -1;
+   MaxLod = 2;
+   LodBias = 5.0;
+   NearestFilter = GL_TRUE;
+}
+
+
+static void
+makeImage(int level, int width, int height)
+{
+#if 0
+   GLubyte img[SIZE*SIZE*3];
+   int i, j;
+
+   (void)size;
+   for (i = 0; i < height; i++) {
+      for (j = 0; j < width; j++) {
+         int k = (i * width + j) * 3;
+         img[k + 0] = 255 * ((level + 1) % 2);
+         img[k + 1] = 255 * ((level + 1) % 2);
+         img[k + 2] = 255 * ((level + 1) % 2);
+      }
+   }
+
+   glTexImage2D(GL_TEXTURE_2D, level, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, width, height, 0,
+                GL_RGB, GL_UNSIGNED_BYTE, img);
+#else
+   GLubyte img[128];
+   GLint size[] = {
+      128, /* 16x16 */
+      32,  /*  8x8  */
+      8,   /*  4x4  */
+      8,   /*  2x2  */
+      8,   /*  1x1  */
+   };
+   int i;
+   int value = ((level + 1) % 2) * 0xffffffff;
+   memset(img, 0, 128);
+
+   /* generate black and white mipmap levels */
+   if (value)
+      for (i = 0; i < size[level] / 4; i += 2)
+         ((int*)img)[i] = value;
+
+   glCompressedTexImage2D(GL_TEXTURE_2D, level,
+                          GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
+                          width, height, 0,
+                          size[level], img);
+#endif
+}
+
+
+static void
+makeImages(void)
+{
+   int i, sz;
+
+   for (i = 0, sz = SIZE; sz >= 1; i++, sz /= 2) {
+      makeImage(i, sz, sz);
+      printf("Level %d size: %d x %d\n", i, sz, sz);
+   }
+}
+
+
+static void
+myInit(void)
+{
+
+   initValues();
+
+   glEnable(GL_DEPTH_TEST);
+   glDepthFunc(GL_LESS);
+   glShadeModel(GL_FLAT);
+
+   glTranslatef(0.0, 0.0, -3.6);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   glGenTextures(1, &texImage);
+   glBindTexture(GL_TEXTURE_2D, texImage);
+   makeImages();
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+   glEnable(GL_TEXTURE_2D);
+}
+
+
+static void
+display(void)
+{
+   GLfloat tcm = 1.0;
+   glBindTexture(GL_TEXTURE_2D, texImage);
+
+   printf("BASE_LEVEL=%d  MAX_LEVEL=%d  MIN_LOD=%.2g  MAX_LOD=%.2g  Bias=%.2g  Filter=%s\n",
+         BaseLevel, MaxLevel, MinLod, MaxLod, LodBias,
+         NearestFilter ? "NEAREST" : "LINEAR");
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, MinLod);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, MaxLod);
+
+   if (NearestFilter) {
+      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+            GL_NEAREST_MIPMAP_NEAREST);
+   }
+   else {
+      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+            GL_LINEAR_MIPMAP_LINEAR);
+   }
+
+   glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, LodBias);
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   glBegin(GL_QUADS);
+   glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);
+   glTexCoord2f(0.0, tcm); glVertex3f(-2.0, 1.0, 0.0);
+   glTexCoord2f(tcm * 3000.0, tcm); glVertex3f(3000.0, 1.0, -6000.0);
+   glTexCoord2f(tcm * 3000.0, 0.0); glVertex3f(3000.0, -1.0, -6000.0);
+   glEnd();
+   glFlush();
+}
+
+
+static void
+myReshape(int w, int h)
+{
+   glViewport(0, 0, w, h);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(60.0, 1.0*(GLfloat)w/(GLfloat)h, 1.0, 30000.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void
+key(unsigned char k, int x, int y)
+{
+  (void) x;
+  (void) y;
+  switch (k) {
+  case 'b':
+     BaseLevel--;
+     if (BaseLevel < 0)
+        BaseLevel = 0;
+     break;
+  case 'B':
+     BaseLevel++;
+     if (BaseLevel > 10)
+        BaseLevel = 10;
+     break;
+  case 'm':
+     MaxLevel--;
+     if (MaxLevel < 0)
+        MaxLevel = 0;
+     break;
+  case 'M':
+     MaxLevel++;
+     if (MaxLevel > 10)
+        MaxLevel = 10;
+     break;
+  case 'l':
+     LodBias -= 0.25;
+     break;
+  case 'L':
+     LodBias += 0.25;
+     break;
+  case 'n':
+     MinLod -= 0.25;
+     break;
+  case 'N':
+     MinLod += 0.25;
+     break;
+  case 'x':
+     MaxLod -= 0.25;
+     break;
+  case 'X':
+     MaxLod += 0.25;
+     break;
+  case 'f':
+     NearestFilter = !NearestFilter;
+     break;
+  case ' ':
+     initValues();
+     break;
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
+
+static void
+usage(void)
+{
+   printf("usage:\n");
+   printf("  b/B    decrease/increase GL_TEXTURE_BASE_LEVEL\n");
+   printf("  m/M    decrease/increase GL_TEXTURE_MAX_LEVEL\n");
+   printf("  n/N    decrease/increase GL_TEXTURE_MIN_LOD\n");
+   printf("  x/X    decrease/increase GL_TEXTURE_MAX_LOD\n");
+   printf("  l/L    decrease/increase GL_TEXTURE_LOD_BIAS\n");
+   printf("  f      toggle nearest/linear filtering\n");
+   printf("  SPACE  reset values\n");
+}
+
+
+int
+main(int argc, char** argv)
+{
+    glutInit(&argc, argv);
+    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
+    glutInitWindowSize (600, 600);
+    glutCreateWindow (argv[0]);
+    glewInit();
+    myInit();
+    glutReshapeFunc (myReshape);
+    glutDisplayFunc(display);
+    glutKeyboardFunc(key);
+    usage();
+    glutMainLoop();
+    return 0;             /* ANSI C requires main to return int. */
+}