From 5b8ed5150141d714354f26051c8c052a446f2cbd Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 14 Mar 2003 15:41:51 +0000
Subject: [PATCH] simple NV_fragment_program texture test

---
 progs/tests/fptexture.c | 151 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 progs/tests/fptexture.c

diff --git a/progs/tests/fptexture.c b/progs/tests/fptexture.c
new file mode 100644
index 00000000000..a62116b3201
--- /dev/null
+++ b/progs/tests/fptexture.c
@@ -0,0 +1,151 @@
+/* GL_NV_fragment_program texture test */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+#include "readtex.c"
+
+
+#define TEXTURE_FILE "../images/girl.rgb"
+
+static GLfloat Xrot = 0.0, Yrot = 0.0, Zrot = 0.0;
+
+
+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);
+
+   glBegin(GL_POLYGON);
+   glColor4f(1.0, 1.0, 1.0, 1);   glTexCoord2f(0, 0);   glVertex2f(-1, -1);
+   glColor4f(0.2, 0.2, 1.0, 1);   glTexCoord2f(1, 0);   glVertex2f( 1, -1);
+   glColor4f(0.2, 1.0, 0.2, 1);   glTexCoord2f(1, 1);   glVertex2f( 1,  1);
+   glColor4f(1.0, 0.2, 0.2, 1);   glTexCoord2f(0, 1);   glVertex2f(-1,  1);
+   glEnd();
+
+   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, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -8.0 );
+}
+
+
+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 Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   static const char *modulate2D =
+      "!!FP1.0\n"
+      "TEX R0, f[TEX0], TEX0, 2D; \n"
+      "MUL o[COLR], R0, f[COL0]; \n"
+      "END"
+      ;
+   GLuint modulateProg;
+   GLuint Texture;
+
+   if (!glutExtensionSupported("GL_NV_fragment_program")) {
+      printf("Error: GL_NV_fragment_program not supported!\n");
+      exit(1);
+   }
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+   /* Setup the fragment program */
+   glGenProgramsNV(1, &modulateProg);
+   glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, modulateProg,
+                   strlen(modulate2D),
+                   (const GLubyte *) modulate2D);
+   printf("glGetError = 0x%x\n", (int) glGetError());
+   printf("glError(GL_PROGRAM_ERROR_STRING_NV) = %s\n",
+          (char *) glGetString(GL_PROGRAM_ERROR_STRING_NV));
+   assert(glIsProgramNV(modulateProg));
+
+   glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, modulateProg);
+   glEnable(GL_FRAGMENT_PROGRAM_NV);
+
+   /* Load texture */
+   glGenTextures(1, &Texture);
+   glBindTexture(GL_TEXTURE_2D, Texture);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+      printf("Error: couldn't load texture image file %s\n", TEXTURE_FILE);
+      exit(1);
+   }
+   /* XXX this enable shouldn't really be needed!!! */
+   glEnable(GL_TEXTURE_2D);
+
+   glClearColor(.3, .3, .3, 0);
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 250, 250 );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}