id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
7669	S3TC reported in OpenGL extensions, but not working	wolf42		"VirtualBox's OpenGL driver reports that it supports both GL_ARB_texture_compression and GL_EXT_texture_compression_s3tc, but attempt to load compressed texture results in OpenGL error 1282 (invalid operation).

Testcase:
{{{
/* gcc dupa.c `sdl-config --libs --cflags` -lGL */
#include <stdio.h>
#include <SDL.h>
#include <GL/gl.h>
#include <GL/glext.h>

int main()
{
        int tex;
        char* buf = malloc( 64 * 64 / 2);
        memset( buf, 0, 64 * 64 / 2);

        SDL_Init( SDL_INIT_VIDEO );
        SDL_SetVideoMode( 64, 64, 24, SDL_OPENGL );

        glGenTextures( 1, &tex );
        glBindTexture( GL_TEXTURE_2D, tex );

        printf( ""before: %i\n"", glGetError() );
        /* glCompressedTexImage2D <- GL_ARB_texture_compression
         * GL_COMPRESSED_RGB_S3TC_DXT1_EXT <- GL_EXT_texture_compression_s3tc
         */
        glCompressedTexImage2D( GL_TEXTURE_2D, 0, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 64, 64, 0, 64 * 64 / 2, buf );
        printf( ""after: %i\n"", glGetError() );

        return 0;
}
}}}

Results when run using VirtualBox video driver:
{{{
before: 0
after: 1282
}}}

Results when run with an external X server:
{{{
before: 0
after: 0
}}}

VirtualBox video driver:
{{{
OpenGL vendor string: Humper
OpenGL renderer string: Chromium
OpenGL version string: 2.1 Chromium 1.9
OpenGL shading language version string: 3.30 NVIDIA via Cg compiler

% glxinfo|grep compress
    GL_EXT_texture_compression_s3tc, GL_EXT_draw_range_elements,
    GL_ARB_texture_compression, GL_ARB_texture_cube_map,
}}}

External X server (indirect rendering on win32 host):
{{{
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 9800 GTX/9800 GTX+/PCI/SSE2
OpenGL version string: 1.4 (3.3.0)

% LIBGL_ALWAYS_INDIRECT=1 DISPLAY=192.168.1.2:0 glxinfo | grep compress
    GL_ARB_texture_border_clamp, GL_ARB_texture_compression,
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_edge_clamp,
}}}"	defect	closed	3D support	VirtualBox 3.2.10	fixed			Linux	Windows