Add new test "texfilt". This test is a cousin to texwrap. Instead of

testing various texture wrap modes, this test examines various texture
filter modes, including anisotropic.

Add CFLAGS to a couple places in Makefile so that 32-bit builds on
64-bit archs will work correctly.

2 files changed, 402 insertions, 3 deletions

diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index 03bb6c2ad5..3143b2a6c2 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -47,6 +47,7 @@ SOURCES = antialias.c \
 	stencilwrap.c \
 	stencil_wrap.c \
 	tex1d.c \
+	texfilt.c \
 	texline.c \
 	texobjshare.c \
 	texrect.c \
@@ -100,13 +101,13 @@ getproclist.h: $(TOP)/src/mesa/glapi/gl_API.xml getprocaddress.c getprocaddress.
 	python getprocaddress.py > getproclist.h
 
 afsmultiarb: afsmultiarb.o readtex.o
-	$(CC) afsmultiarb.o readtex.o $(LIBS) -o $@
+	$(CC) $(CFLAGS) afsmultiarb.o readtex.o $(LIBS) -o $@
 
 afsmultiarb.o: afsmultiarb.c readtex.h
 	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
 
 texrect: texrect.o readtex.o
-	$(CC) texrect.o readtex.o $(LIBS) -o $@
+	$(CC) $(CFLAGS) texrect.o readtex.o $(LIBS) -o $@
 
 texrect.o: texrect.c readtex.h
 	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
@@ -118,7 +119,7 @@ bug_3195.o: bug_3195.c readtex.h
 	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
 
 invert: invert.o readtex.o
-	$(CC) invert.o readtex.o $(LIBS) -o $@
+	$(CC) $(CFLAGS) invert.o readtex.o $(LIBS) -o $@
 
 invert.o: invert.c readtex.h
 	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
diff --git a/progs/tests/texfilt.c b/progs/tests/texfilt.c
new file mode 100644
index 0000000000..6ee4bc4eae
--- /dev/null
+++ b/progs/tests/texfilt.c
@@ -0,0 +1,398 @@
+/*
+ * (C) Copyright IBM Corporation 2005
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glut.h>
+
+const GLenum filter_modes[] = {
+     GL_NEAREST,
+     GL_LINEAR,
+     GL_NEAREST_MIPMAP_NEAREST,
+     GL_NEAREST_MIPMAP_LINEAR,
+     GL_LINEAR_MIPMAP_NEAREST,
+     GL_LINEAR_MIPMAP_LINEAR,
+};
+
+static GLenum min_filter = GL_LINEAR_MIPMAP_LINEAR;
+static GLenum mag_filter = GL_LINEAR;
+
+static unsigned segments = 64;
+static GLfloat * position_data = NULL;
+static GLfloat * texcoord_data = NULL;
+static GLfloat max_anisotropy = 0.0;
+static GLfloat anisotropy = 1.0;
+
+static void generate_tunnel( unsigned num_segs, GLfloat ** pos_data,
+    GLfloat ** tex_data );
+static void generate_textures( unsigned mode );
+
+#define min(a,b)  ( (a) < (b) ) ? (a) : (b)
+#define max(a,b)  ( (a) > (b) ) ? (a) : (b)
+
+
+static void Display( void )
+{
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter );
+   
+   if ( max_anisotropy > 0.0 ) {
+      glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
+		       anisotropy );
+   }
+
+   glClear( GL_COLOR_BUFFER_BIT );
+   glLoadIdentity();
+   glTranslatef( 0.0f, 0.0f, -19.0f );
+
+   glVertexPointer( 4, GL_FLOAT, 0, position_data );
+   glTexCoordPointer( 2, GL_FLOAT, 0, texcoord_data );
+   glEnableClientState( GL_VERTEX_ARRAY );
+   glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+   glDrawArrays( GL_QUADS, 0, 4 * segments );
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluPerspective(45.0f, (GLfloat)(width)/(GLfloat)(height), 0.1f, 100.0f);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   GLfloat new_anisotropy = anisotropy;
+
+   (void) x;
+   (void) y;
+
+
+   switch( key ) {
+   case 'a': {
+      new_anisotropy = anisotropy - 1.0;
+      break;
+   }
+
+   case 'A': {
+      new_anisotropy = anisotropy + 1.0;
+      break;
+   }
+
+   case 's': {
+      segments--;
+      if ( segments < 3 ) {
+	 segments = 3;
+      }
+      generate_tunnel( segments, & position_data, & texcoord_data );
+      break;
+   }
+
+   case 'S': {
+      segments++;
+      if ( segments > 128 ) {
+	 segments = 128;
+      }
+      generate_tunnel( segments, & position_data, & texcoord_data );
+      break;
+   }
+   case 'q':
+   case 'Q':
+   case 27:
+      exit(0);
+      break;
+   }
+
+   new_anisotropy = max( new_anisotropy, 1.0 );
+   new_anisotropy = min( new_anisotropy, max_anisotropy );
+   if ( new_anisotropy != anisotropy ) {
+      anisotropy = new_anisotropy;
+      printf( "Texture anisotropy: %f%s\n", anisotropy,
+	      (anisotropy == 1.0) ? " (disabled)" : "" );
+   }
+
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   (void) key;
+   glutPostRedisplay();
+}
+
+
+static void menu_handler( int selection )
+{
+   switch( selection >> 3 ) {
+   case 0:
+      glBindTexture( GL_TEXTURE_2D, selection );
+      break;
+      
+   case 1:
+      min_filter = filter_modes[ selection & 7 ];
+      break;
+
+   case 2:
+      mag_filter = filter_modes[ selection & 7 ];
+      break;
+   }
+
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   glDisable(GL_CULL_FACE);
+   glEnable(GL_TEXTURE_2D);
+   glClearColor(0.0f, 0.0f, 0.4f, 0.0f);
+   glShadeModel(GL_SMOOTH);
+   glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+
+   generate_tunnel( segments, & position_data, & texcoord_data );
+
+   glBindTexture( GL_TEXTURE_2D, 1 );
+   generate_textures(1);
+   
+   glBindTexture( GL_TEXTURE_2D, 2 );
+   generate_textures(2);
+
+   glBindTexture( GL_TEXTURE_2D, 3 );
+   generate_textures(3);
+
+   if ( glutExtensionSupported( "GL_EXT_texture_filter_anisotropic" ) ) {
+      glGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, & max_anisotropy );
+   }
+   
+   printf("Maximum texture anisotropy: %f\n", max_anisotropy );
+   
+   /* Create the menus. */
+
+   glutCreateMenu( menu_handler );
+   glutAddMenuEntry( "Min filter: GL_NEAREST",                 8 + 0 );
+   glutAddMenuEntry( "Min filter: GL_LINEAR",                  8 + 1 );
+   glutAddMenuEntry( "Min filter: GL_NEAREST_MIMMAP_NEAREST",  8 + 2 );
+   glutAddMenuEntry( "Min filter: GL_NEAREST_MIMMAP_LINEAR",   8 + 3 );
+   glutAddMenuEntry( "Min filter: GL_LINEAR_MIMMAP_NEAREST",   8 + 4 );
+   glutAddMenuEntry( "Min filter: GL_LINEAR_MIMMAP_LINEAR",    8 + 5 );
+   glutAddMenuEntry( "Mag filter: GL_NEAREST",                16 + 0 );
+   glutAddMenuEntry( "Mag filter: GL_LINEAR",                 16 + 1 );
+   glutAddMenuEntry( "Texture: regular mipmaps",                   1 );
+   glutAddMenuEntry( "Texture: blended mipmaps",                   2 );
+   glutAddMenuEntry( "Texture: color mipmaps",                     3 );
+   glutAttachMenu( GLUT_RIGHT_BUTTON );
+}
+
+
+static void generate_tunnel( unsigned num_segs, GLfloat ** pos_data,
+			     GLfloat ** tex_data )
+{
+   const GLfloat far = 20.0f;
+   const GLfloat near = -90.0f;
+   const GLfloat far_tex = 30.0f;
+   const GLfloat near_tex = 0.0f;
+   const GLfloat angle_step = (2 * M_PI) / num_segs;
+   const GLfloat tex_coord_step = 2.0 / num_segs;
+   GLfloat angle = 0.0f;
+   GLfloat tex_coord = 0.0f;
+   unsigned i;
+   GLfloat * position;
+   GLfloat * texture;
+
+
+   position = realloc( *pos_data, sizeof( GLfloat ) * num_segs * 4 * 4 );
+   texture = realloc( *tex_data, sizeof( GLfloat ) * num_segs * 4 * 2 );
+
+   *pos_data = position;
+   *tex_data = texture;
+
+   for ( i = 0 ; i < num_segs ; i++ ) {
+      position[0] = 2.5 * sinf( angle );
+      position[1] = 2.5 * cosf( angle );
+      position[2] = (i & 1) ? far : near;
+      position[3] = 1.0f;
+
+      position[4] = position[0];
+      position[5] = position[1];
+      position[6] = (i & 1) ? near : far;
+      position[7] = 1.0f;
+
+      position += 8;
+
+      texture[0] = tex_coord;
+      texture[1] = (i & 1) ? far_tex : near_tex;
+      texture += 2;
+
+      texture[0] = tex_coord;
+      texture[1] = (i & 1) ? near_tex : far_tex;
+      texture += 2;
+
+      angle += angle_step;
+      tex_coord += tex_coord_step;
+
+      position[0] = 2.5 * sinf( angle );
+      position[1] = 2.5 * cosf( angle );
+      position[2] = (i & 1) ? near : far;
+      position[3] = 1.0f;
+
+      position[4] = position[0];
+      position[5] = position[1];
+      position[6] = (i & 1) ? far : near;
+      position[7] = 1.0f;
+
+      position += 8;
+
+      texture[0] = tex_coord;
+      texture[1] = (i & 1) ? near_tex : far_tex;
+      texture += 2;
+
+      texture[0] = tex_coord;
+      texture[1] = (i & 1) ? far_tex : near_tex;
+      texture += 2;
+   }
+}
+
+
+static void generate_textures( unsigned mode )
+{
+#define LEVEL_COLORS 6
+   const GLfloat colors[LEVEL_COLORS][3] = {
+	{ 1.0, 0.0, 0.0 },  /* 32 x 32 */
+	{ 0.0, 1.0, 0.0 },  /* 16 x 16 */
+	{ 0.0, 0.0, 1.0 },  /*  8 x  8 */
+	{ 1.0, 0.0, 1.0 },  /*  4 x  4 */
+	{ 1.0, 1.0, 1.0 },  /*  2 x  2 */
+	{ 1.0, 1.0, 0.0 }   /*  1 x  1 */
+   };
+   const unsigned checkers_per_level = 2;
+   GLfloat * tex;
+   unsigned level;
+   unsigned size;
+   GLint max_size;
+
+
+   glGetIntegerv( GL_MAX_TEXTURE_SIZE, & max_size );
+   if ( max_size > 512 ) {
+      max_size = 512;
+   }
+
+   tex = malloc( sizeof( GLfloat ) * 3 * max_size * max_size );
+
+   level = 0;
+   for ( size = max_size ; size > 0 ; size >>= 1 ) {
+      unsigned divisor = size / checkers_per_level;
+      unsigned i;
+      unsigned j;
+      GLfloat checkers[2][3];
+
+
+      if ((level == 0) || (mode == 1)) {
+	 checkers[0][0] = 1.0;
+	 checkers[0][1] = 1.0;
+	 checkers[0][2] = 1.0;
+	 checkers[1][0] = 0.0;
+	 checkers[1][1] = 0.0;
+	 checkers[1][2] = 0.0;
+      }
+      else if (mode == 2) {
+	 checkers[0][0] = colors[level % LEVEL_COLORS][0];
+	 checkers[0][1] = colors[level % LEVEL_COLORS][1];
+	 checkers[0][2] = colors[level % LEVEL_COLORS][2];
+	 checkers[1][0] = colors[level % LEVEL_COLORS][0] * 0.5;
+	 checkers[1][1] = colors[level % LEVEL_COLORS][1] * 0.5;
+	 checkers[1][2] = colors[level % LEVEL_COLORS][2] * 0.5;
+      }
+      else {
+	 checkers[0][0] = colors[level % LEVEL_COLORS][0];
+	 checkers[0][1] = colors[level % LEVEL_COLORS][1];
+	 checkers[0][2] = colors[level % LEVEL_COLORS][2];
+	 checkers[1][0] = colors[level % LEVEL_COLORS][0];
+	 checkers[1][1] = colors[level % LEVEL_COLORS][1];
+	 checkers[1][2] = colors[level % LEVEL_COLORS][2];
+      }
+
+      if ( divisor == 0 ) {
+	 divisor = 1;
+
+	 checkers[0][0] = (checkers[0][0] + checkers[1][0]) / 2;
+	 checkers[0][1] = (checkers[0][0] + checkers[1][0]) / 2;
+	 checkers[0][2] = (checkers[0][0] + checkers[1][0]) / 2;
+	 checkers[1][0] = checkers[0][0];
+	 checkers[1][1] = checkers[0][1];
+	 checkers[1][2] = checkers[0][2];
+      }
+
+
+      for ( i = 0 ; i < size ; i++ ) {
+	 for ( j = 0 ; j < size ; j++ ) {
+	    const unsigned idx = ((i ^ j) / divisor) & 1;
+
+	    tex[ ((i * size) + j) * 3 + 0] = checkers[ idx ][0];
+	    tex[ ((i * size) + j) * 3 + 1] = checkers[ idx ][1];
+	    tex[ ((i * size) + j) * 3 + 2] = checkers[ idx ][2];
+	 }
+      }
+      
+      glTexImage2D( GL_TEXTURE_2D, level, GL_RGB, size, size, 0,
+		    GL_RGB, GL_FLOAT, tex );
+      level++;
+   }
+
+   free( tex );
+}
+
+
+int main( int argc, char ** argv )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 800, 600 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow( "Texture Filter Test" );
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+
+   Init();
+
+   printf("\nUse the right-button menu to select the texture and filter mode.\n");
+   printf("Use 'A' and 'a' to increase and decrease the aniotropy.\n");
+   printf("Use 'S' and 's' to increase and decrease the number of cylinder segments.\n");
+   printf("Use 'q' to exit.\n\n");
+
+   glutMainLoop();
+   return 0;
+}