test for GL_NV_texture_rectangle

diff --git a/progs/tests/texrect.c b/progs/tests/texrect.c
new file mode 100644 (file)
index 0000000..1468c73
--- /dev/null
+++ b/progs/tests/texrect.c
@@ -0,0 +1,297 @@
+/* $Id: texrect.c,v 1.1 2002/06/15 03:08:19 brianp Exp $ */
+
+/* GL_NV_texture_rectangle test
+ *
+ * Brian Paul
+ * 14 June 2002
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.c"   /* I know, this is a hack. */
+
+#define TEXTURE_0_FILE "../images/girl.rgb"
+#define TEXTURE_1_FILE "../images/reflect.rgb"
+
+#define TEX0 1
+#define TEX7 8
+#define ANIMATE 10
+#define QUIT 100
+
+static GLboolean Animate = GL_TRUE;
+static GLint NumUnits = 2;
+static GLboolean TexEnabled[8];
+static GLint Width[8], Height[8];  /* image sizes */
+static GLenum Format[8];
+
+static GLfloat Xrot = 00.0, Yrot = 00.0, Zrot = 0.0;
+
+
+static void Idle( void )
+{
+   Zrot += 1.0;
+   glutPostRedisplay();
+}
+
+
+static void DrawObject(void)
+{
+   GLint i;
+   GLfloat d = 0;  /* set this >0 to test clamping */
+
+   glColor3f(.1, .1, .1);  /* modulate this */
+
+   glPushMatrix();
+
+      glRotatef(Zrot, 0, 0, 1);
+
+      glBegin(GL_QUADS);
+
+      for (i = 0; i < NumUnits; i++)
+         glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, -d, -d);
+      glVertex2f(-1.0, -1.0);
+
+      for (i = 0; i < NumUnits; i++)
+         glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, -3);
+      glVertex2f(1.0, -1.0);
+
+      for (i = 0; i < NumUnits; i++)
+         glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, Height[i]+3);
+      glVertex2f(1.0, 1.0);
+
+      for (i = 0; i < NumUnits; i++)
+         glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, -d, Height[i]+d);
+      glVertex2f(-1.0, 1.0);
+
+      glEnd();
+   glPopMatrix();
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glPushMatrix();
+      glRotatef(Xrot, 1.0, 0.0, 0.0);
+      glRotatef(Yrot, 0.0, 1.0, 0.0);
+      glRotatef(Zrot, 0.0, 0.0, 1.0);
+      glScalef(5.0, 5.0, 5.0);
+      DrawObject();
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 100.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -35.0 );
+}
+
+
+static void ModeMenu(int entry)
+{
+   if (entry >= TEX0 && entry < TEX0 + NumUnits) {
+      /* toggle */
+      GLint i = entry - TEX0;
+      TexEnabled[i] = !TexEnabled[i];
+      glActiveTextureARB(GL_TEXTURE0_ARB + i);
+      if (TexEnabled[i]) {
+         glEnable(GL_TEXTURE_RECTANGLE_NV);
+      }
+      else {
+         glDisable(GL_TEXTURE_RECTANGLE_NV);
+      }
+      printf("Enabled: ");
+      for (i = 0; i < NumUnits; i++)
+         printf("%d ", (int) TexEnabled[i]);
+      printf("\n");
+   }
+   else if (entry==ANIMATE) {
+      Animate = !Animate;
+      if (Animate)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+   }
+   else if (entry==QUIT) {
+      exit(0);
+   }
+
+   glutPostRedisplay();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   float step = 3.0;
+   (void) x;
+   (void) y;
+
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot += step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot += step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot -= step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( int argc, char *argv[] )
+{
+   GLuint texObj[8];
+   GLint size, i;
+
+   if (!glutExtensionSupported("GL_ARB_multitexture")) {
+      printf("Sorry, GL_ARB_multitexture needed by this program\n");
+      exit(1);
+   }
+
+   if (!glutExtensionSupported("GL_NV_texture_rectangle")) {
+      printf("Sorry, GL_NV_texture_rectangle needed by this program\n");
+      exit(1);
+   }
+
+   glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &NumUnits);
+   printf("%d texture units supported, using 2.\n", NumUnits);
+   if (NumUnits > 2)
+      NumUnits = 2;
+
+   glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, &size);
+   printf("%d x %d max texture rectangle size\n", size, size);
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   for (i = 0; i < NumUnits; i++) {
+      TexEnabled[i] = GL_TRUE;
+   }
+
+   /* allocate two texture objects */
+   glGenTextures(NumUnits, texObj);
+
+   /* setup the texture objects */
+   for (i = 0; i < NumUnits; i++) {
+
+      glActiveTextureARB(GL_TEXTURE0_ARB + i);
+
+      glBindTexture(GL_TEXTURE_RECTANGLE_NV, texObj[i]);
+      glTexParameteri(GL_TEXTURE_RECTANGLE_NV,
+                      GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+      glTexParameteri(GL_TEXTURE_RECTANGLE_NV,
+                      GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+      if (i == 0) {
+         GLubyte *img = LoadRGBImage(TEXTURE_0_FILE, &Width[0], &Height[0],
+                                     &Format[0]);
+         if (!img) {
+            printf("Error: couldn't load texture image\n");
+            exit(1);
+         }
+         printf("Texture %d:  %s (%d x %d)\n", i,
+                TEXTURE_0_FILE, Width[0], Height[0]);
+         glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, GL_RGB,
+                      Width[0], Height[0], 0,
+                      Format[0], GL_UNSIGNED_BYTE, img);
+      }
+      else {
+         GLubyte *img = LoadRGBImage(TEXTURE_1_FILE, &Width[1], &Height[1],
+                                     &Format[1]);
+         if (!img) {
+            printf("Error: couldn't load texture image\n");
+            exit(1);
+         }
+         printf("Texture %d:  %s (%d x %d)\n", i,
+                TEXTURE_1_FILE, Width[1], Height[1]);
+         glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, GL_RGB,
+                      Width[1], Height[1], 0,
+                      Format[1], GL_UNSIGNED_BYTE, img);
+      }
+
+      if (i < 1)
+         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
+      else
+         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
+
+      if (TexEnabled[i])
+         glEnable(GL_TEXTURE_RECTANGLE_NV);
+   }
+
+   glShadeModel(GL_FLAT);
+   glClearColor(0.3, 0.3, 0.4, 1.0);
+
+   if (argc > 1 && strcmp(argv[1], "-info")==0) {
+      printf("GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+      printf("GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+      printf("GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+      printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+   }
+}
+
+
+int main( int argc, char *argv[] )
+{
+   GLint i;
+
+   glutInit( &argc, argv );
+   glutInitWindowSize( 300, 300 );
+   glutInitWindowPosition( 0, 0 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow(argv[0] );
+
+   Init( argc, argv );
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   if (Animate)
+      glutIdleFunc( Idle );
+
+   glutCreateMenu(ModeMenu);
+
+   for (i = 0; i < NumUnits; i++) {
+      char s[100];
+      sprintf(s, "Toggle Texture %d", i);
+      glutAddMenuEntry(s, TEX0 + i);
+   }
+   glutAddMenuEntry("Toggle Animation", ANIMATE);
+   glutAddMenuEntry("Quit", QUIT);
+   glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+   glutMainLoop();
+   return 0;
+}