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-rw-r--r--nx-X11/extras/Mesa_6.4.2/progs/demos/paltex.c270
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;
+}
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