A quick little test to show disapeearing specular color between vertex and fragment program execution

2003-12-08 21:43:55 +00:00
parent 6b9e8279dd
commit 93c2dacca6
2 changed files with 196 additions and 1 deletions
@@ -9,8 +9,9 @@ LIBDIR = $(TOP)/lib
 LIBS = -L$(LIBDIR) $(APP_LIB_DEPS)

 SOURCES = antialias.c \
+   arbfpspec.c \
 	arbfptest1.c \
-	arbfptexture.c \
+   arbfptexture.c \
 	arbvptest1.c \
 	arbvptest3.c \
 	arbvptorus.c \
@@ -0,0 +1,194 @@
+/*
+ * To demo that specular color gets lost someplace after vertex
+ * program completion and fragment program startup
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+static float Xrot = 0.0, Yrot = 0.0, Zrot = 0.0;
+static GLboolean Anim = GL_TRUE;
+
+
+static void Idle( void )
+{
+   Xrot += .3;
+   Yrot += .4;
+   Zrot += .2;
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+      glRotatef(Xrot, 1, 0, 0);
+      glRotatef(Yrot, 0, 1, 0);
+      glRotatef(Zrot, 0, 0, 1);
+      glutSolidTorus(0.75, 2.0, 10, 20);
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -2.0, 2.0, -2.0, 2.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -12.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case ' ':
+         Xrot = Yrot = Zrot = 0;
+         break;
+      case 'a':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc(Idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'z':
+         Zrot -= 5.0;
+         break;
+      case 'Z':
+         Zrot += 5.0;
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   const GLfloat 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( void )
+{
+   GLint errno;
+   GLuint prognum, fprognum;
+	
+   static const char prog[] = 
+      "!!ARBvp1.0\n"
+      "DP4   result.position.x, state.matrix.mvp.row[0], vertex.position ;\n"
+      "DP4   result.position.y, state.matrix.mvp.row[1], vertex.position ;\n"
+      "DP4   result.position.z, state.matrix.mvp.row[2], vertex.position ;\n"
+      "DP4   result.position.w, state.matrix.mvp.row[3], vertex.position ;\n"
+      "MOV   result.color.front.primary,   {.5, .5, .5, 1};\n"		
+      "MOV   result.color.front.secondary, {1, 1, 1, 1};\n"
+      "END";
+
+	static const char fprog[] = 
+     "!!ARBfp1.0\n"			  
+     "MOV result.color, fragment.color.secondary;\n"
+	  "END";
+
+   if (!glutExtensionSupported("GL_ARB_vertex_program")) {
+      printf("Sorry, this program requires GL_ARB_vertex_program");
+      exit(1);
+   }
+
+   if (!glutExtensionSupported("GL_ARB_fragment_program")) {
+      printf("Sorry, this program requires GL_ARB_fragment_program");
+      exit(1);
+   }
+
+
+   	
+   glGenProgramsARB(1, &prognum);
+   glGenProgramsARB(1, &fprognum);
+
+   glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
+   glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
+                        strlen(prog), (const GLubyte *) prog);
+
+   assert(glIsProgramARB(prognum));
+   errno = glGetError();
+   printf("glGetError = %d\n", errno);
+   if (errno != GL_NO_ERROR)
+   {
+      GLint errorpos;
+
+      glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
+      printf("errorpos: %d\n", errorpos);
+      printf("%s\n", glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+   }
+
+   glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, fprognum);
+   glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
+                        strlen(fprog), (const GLubyte *) fprog);
+   errno = glGetError();
+   printf("glGetError = %d\n", errno);
+   if (errno != GL_NO_ERROR)
+   {
+      GLint errorpos;
+
+      glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
+      printf("errorpos: %d\n", errorpos);
+      printf("%s\n", glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+   }
+
+   glEnable(GL_VERTEX_PROGRAM_ARB);
+   glEnable(GL_FRAGMENT_PROGRAM_ARB);
+   glEnable(GL_DEPTH_TEST);
+   glClearColor(0.3, 0.3, 0.3, 1);
+}
+
+
+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 );
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}