Include mesa-6.4.2 project

1 files changed, 270 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa_6.4.2/progs/demos/paltex.c b/nx-X11/extras/Mesa_6.4.2/progs/demos/paltex.c
new file mode 100644
index 000000000..aa9c0da36
--- /dev/null
+++ b/nx-X11/extras/Mesa_6.4.2/progs/demos/paltex.c
@@ -0,0 +1,270 @@
+
+/*
+ * Paletted texture demo.  Written by Brian Paul.
+ * This program is in the public domain.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glut.h>
+
+
+static float Rot = 0.0;
+static GLboolean Anim = 1;
+
+
+static void Idle( void )
+{
+   float t = glutGet(GLUT_ELAPSED_TIME) * 0.001;  /* in seconds */
+   Rot = t * 360 / 4;  /* 1 rotation per 4 seconds */
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   /* draw background gradient */
+   glDisable(GL_TEXTURE_2D);
+   glBegin(GL_POLYGON);
+   glColor3f(1.0, 0.0, 0.2); glVertex2f(-1.5, -1.0);
+   glColor3f(1.0, 0.0, 0.2); glVertex2f( 1.5, -1.0);
+   glColor3f(0.0, 0.0, 1.0); glVertex2f( 1.5,  1.0);
+   glColor3f(0.0, 0.0, 1.0); glVertex2f(-1.5,  1.0);
+   glEnd();
+
+   glPushMatrix();
+   glRotatef(Rot, 0, 0, 1);
+
+   glEnable(GL_TEXTURE_2D);
+   glBegin(GL_POLYGON);
+   glTexCoord2f(0, 1);  glVertex2f(-1, -0.5);
+   glTexCoord2f(1, 1);  glVertex2f( 1, -0.5);
+   glTexCoord2f(1, 0);  glVertex2f( 1,  0.5);
+   glTexCoord2f(0, 0);  glVertex2f(-1,  0.5);
+   glEnd();
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.5, 1.5, -1.0, 1.0, -1.0, 1.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+      case 's':
+         Rot += 0.5;
+         break;
+      case ' ':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc( Idle );
+         else
+            glutIdleFunc( NULL );
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+#define HEIGHT 8
+#define WIDTH 32
+   /* 257 = HEIGHT * WIDTH + 1 (for trailing '\0') */
+   static char texture[257] = {"\
+                                \
+    MMM    EEEE   SSS    AAA    \
+   M M M  E      S   S  A   A   \
+   M M M  EEEE    SS    A   A   \
+   M M M  E         SS  AAAAA   \
+   M   M  E      S   S  A   A   \
+   M   M   EEEE   SSS   A   A   \
+                                "
+      };
+   GLubyte table[256][4];
+
+   if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
+      printf("Sorry, GL_EXT_paletted_texture not supported\n");
+      exit(0);
+   }
+
+   /* load the color table for each texel-index */
+   memset(table, 0, 256*4);
+   table[' '][0] = 255;
+   table[' '][1] = 255;
+   table[' '][2] = 255;
+   table[' '][3] = 64;
+   table['M'][0] = 255;
+   table['M'][1] = 0;
+   table['M'][2] = 0;
+   table['M'][3] = 255;
+   table['E'][0] = 0;
+   table['E'][1] = 255;
+   table['E'][2] = 0;
+   table['E'][3] = 255;
+   table['S'][0] = 0;
+   table['S'][1] = 0;
+   table['S'][2] = 255;
+   table['S'][3] = 255;
+   table['A'][0] = 255;
+   table['A'][1] = 255;
+   table['A'][2] = 0;
+   table['A'][3] = 255;
+
+#ifdef GL_EXT_paletted_texture
+
+#if defined(GL_EXT_shared_texture_palette) && defined(USE_SHARED_PALETTE)
+   printf("Using shared palette\n");
+   glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+   glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
+#else
+   glColorTableEXT(GL_TEXTURE_2D,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+#endif
+
+   glTexImage2D(GL_TEXTURE_2D,       /* target */
+                0,                   /* level */
+                GL_COLOR_INDEX8_EXT, /* internal format */
+                WIDTH, HEIGHT,       /* width, height */
+                0,                   /* border */
+                GL_COLOR_INDEX,      /* texture format */
+                GL_UNSIGNED_BYTE,    /* texture type */
+                texture);            /* the texture */
+#endif
+
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+#undef HEIGHT
+#undef WIDTH
+}
+
+
+
+/*
+ * Color ramp test
+ */
+static void Init2( void )
+{
+#define HEIGHT 32
+#define WIDTH 256
+   static char texture[HEIGHT][WIDTH];
+   GLubyte table[256][4];
+   int i, j;
+
+   if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
+      printf("Sorry, GL_EXT_paletted_texture not supported\n");
+      exit(0);
+   }
+
+   for (j = 0; j < HEIGHT; j++) {
+      for (i = 0; i < WIDTH; i++) {
+         texture[j][i] = i;
+      }
+   }
+
+   for (i = 0; i < 255; i++) {
+      table[i][0] = i;
+      table[i][1] = 0;
+      table[i][2] = 0;
+      table[i][3] = 255;
+   }
+
+#ifdef GL_EXT_paletted_texture
+
+#if defined(GL_EXT_shared_texture_palette) && defined(USE_SHARED_PALETTE)
+   printf("Using shared palette\n");
+   glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+   glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
+#else
+   glColorTableEXT(GL_TEXTURE_2D,    /* target */
+                   GL_RGBA,          /* internal format */
+                   256,              /* table size */
+                   GL_RGBA,          /* table format */
+                   GL_UNSIGNED_BYTE, /* table type */
+                   table);           /* the color table */
+#endif
+
+   glTexImage2D(GL_TEXTURE_2D,       /* target */
+                0,                   /* level */
+                GL_COLOR_INDEX8_EXT, /* internal format */
+                WIDTH, HEIGHT,       /* width, height */
+                0,                   /* border */
+                GL_COLOR_INDEX,      /* texture format */
+                GL_UNSIGNED_BYTE,    /* texture type */
+                texture);            /* teh texture */
+#endif
+
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+   glEnable(GL_TEXTURE_2D);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( 400, 300 );
+
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+
+   glutCreateWindow(argv[0]);
+
+   Init();
+   (void) Init2; /* silence warning */
+
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   if (Anim)
+      glutIdleFunc( Idle );
+
+   glutMainLoop();
+   return 0;
+}