SharedOpenGL/crserverlib/server_getteximage.c

	server_getteximage.c revision e761514762c8705557b347266d54ade68888537c
/* Copyright (c) 2001, Stanford University
 * All rights reserved
 *
 * See the file LICENSE.txt for information on redistributing this software.
 */

#include "chromium.h"
#include "cr_error.h"
#include "cr_mem.h"
#include "cr_pixeldata.h"
#include "server_dispatch.h"
#include "server.h"

void SERVER_DISPATCH_APIENTRY
crServerDispatchGetTexImage(GLenum target, GLint level, GLenum format,
                            GLenum type, GLvoid * pixels)
{
    GLsizei width, height, depth, size;
    GLvoid *buffer = NULL;


#ifdef CR_ARB_pixel_buffer_object
    if (crStateIsBufferBound(GL_PIXEL_PACK_BUFFER_ARB))
    {
        GLvoid *pbo_offset;

        /*pixels are actualy a pointer to location of 8byte network pointer in hgcm buffer
          regarless of guest/host bitness we're using only 4lower bytes as there're no
          pbo>4gb (yet?)
         */
        pbo_offset = (GLvoid*) ((uintptr_t) *((GLint*)pixels));

        cr_server.head_spu->dispatch_table.GetTexImage(target, level, format, type, pbo_offset);

        return;
    }
#endif

    cr_server.head_spu->dispatch_table.GetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
    cr_server.head_spu->dispatch_table.GetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
    cr_server.head_spu->dispatch_table.GetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);

    size = crTextureSize(format, type, width, height, depth);

    if (size && (buffer = crAlloc(size))) {
        /* Note, the other pixel PACK parameters (default values) should
         * be OK at this point.
         */
        cr_server.head_spu->dispatch_table.PixelStorei(GL_PACK_ALIGNMENT, 1);
        cr_server.head_spu->dispatch_table.GetTexImage(target, level, format, type, buffer);
        crServerReturnValue( buffer, size );
        crFree(buffer);
    }
    else {
        /* need to return _something_ to avoid blowing up */
        GLuint dummy = 0;
        crServerReturnValue( (GLvoid *) &dummy, sizeof(dummy) );
    }
}


#if CR_ARB_texture_compression

void SERVER_DISPATCH_APIENTRY
crServerDispatchGetCompressedTexImageARB(GLenum target, GLint level,
                                         GLvoid *img)
{
    GLint size;
    GLvoid *buffer=NULL;

#ifdef CR_ARB_pixel_buffer_object
    if (crStateIsBufferBound(GL_PIXEL_PACK_BUFFER_ARB))
    {
        GLvoid *pbo_offset;

        pbo_offset = (GLvoid*) ((uintptr_t) *((GLint*)img));

        cr_server.head_spu->dispatch_table.GetCompressedTexImageARB(target, level, pbo_offset);

        return;
    }
#endif

    cr_server.head_spu->dispatch_table.GetTexLevelParameteriv(target, level, GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &size);

    if (size && (buffer = crAlloc(size))) {
        /* XXX the pixel PACK parameter should be OK at this point */
        cr_server.head_spu->dispatch_table.GetCompressedTexImageARB(target, level, buffer);
        crServerReturnValue( buffer, size );
        crFree(buffer);
    }
    else {
        /* need to return _something_ to avoid blowing up */
        GLuint dummy = 0;
        crServerReturnValue( (GLvoid *) &dummy, sizeof(dummy) );
    }
}

#endif /* CR_ARB_texture_compression */

void SERVER_DISPATCH_APIENTRY crServerDispatchGetPolygonStipple( GLubyte * mask )
{
#ifdef CR_ARB_pixel_buffer_object
    if (crStateIsBufferBound(GL_PIXEL_PACK_BUFFER_ARB))
    {
        GLvoid *pbo_offset;

        pbo_offset = (GLubyte*) ((uintptr_t) *((GLint*)mask));

        cr_server.head_spu->dispatch_table.GetPolygonStipple(pbo_offset);
    }
    else
#endif
    {
        GLubyte local_mask[128];

        cr_server.head_spu->dispatch_table.GetPolygonStipple( local_mask );
        crServerReturnValue( &(local_mask[0]), 128*sizeof(GLubyte) );
    }
}