From: James Cassidy (jcassidy@nova.galaxyvista.com)
Date: Fri 17 Aug 2001 - 06:32:23 IDT
Has anyone had this problem? I'm observing palette value corruption. I've created a simple program that demonstrates the problem I'm having. It writes values to the palette, then reads them back, comparing the read and write values. I'm using 1.9.9. with a Radon card (r128 driver) on a PIII running Linux 2.2.19 Here's a sample of the output: 0: [ 0: 0: 0] [ 0: 0: 0] attemps=0 1: [ 1: 1: 1] [ 0: 1: 1] attemps=100 2: [ 2: 2: 2] [ 0: 2: 2] attemps=100 3: [ 3: 3: 3] [170: 3: 3] attemps=100 4: [ 4: 4: 4] [170: 4: 4] attemps=100 5: [ 5: 5: 5] [170: 5: 5] attemps=100 6: [ 6: 6: 6] [170: 6: 6] attemps=100 7: [ 7: 7: 7] [ 85: 7: 7] attemps=100 8: [ 8: 8: 8] [ 85: 8: 8] attemps=100 Here's the program that demonstrates the problem: #include <stdio.h> #include <vga.h> #include <vgagl.h> main() { int i, r, g, b, rT, gT, bT, j; FILE *filePtr; filePtr = fopen( "ptest.log", "w" ); if( vga_init() != 0 ) { fprintf( filePtr, "vga_init failure\n" ); exit( 1 ); } if( vga_setmode( G1024x768x256 ) ) { fprintf( filePtr, "setMode failed\n" ); exit( 1 ); } // set context to physical screen if( gl_setcontextvga( G1024x768x256 ) != 0 ) { fprintf( filePtr, "gl_setcontextvga failure: mode not supported\n" ); } // set extended feature 8 bit lut vga_ext_set( VGA_EXT_SET, VGA_CLUT8 ); for( i = 0 ; i < 256 ; i++ ) { r = i; g = i; b = i; for( j = 0 ; j < 100 ; j++ ) { gl_setpalettecolor( i, r, g, b ); gl_getpalettecolor( i, &rT, &gT, &bT ); if( r == rT && g == gT && b == bT ) break; } fprintf( filePtr, "%d: [%3d:%3d:%3d] [%3d:%3d:%3d] attemps=%d\n", i, r, g, b, rT, gT, bT, j ); } vga_setmode( TEXT ); } ------------------------------------------------------------------ Unsubscribe: To: listbot@svgalib.org Body: unsubscribe linux-svgalib
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