xserver-multidpi/GL/glx/glxscreens.c

/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
** 
** http://oss.sgi.com/projects/FreeB
** 
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
** 
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
** 
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
*/

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <string.h>
#include <windowstr.h>
#include <os.h>

#include "glxserver.h"
#include "glxutil.h"
#include "glxext.h"
#include "glcontextmodes.h"

static int glxScreenPrivateIndex;

const char GLServerVersion[] = "1.4";
static const char GLServerExtensions[] = 
			"GL_ARB_depth_texture "
			"GL_ARB_draw_buffers "
			"GL_ARB_fragment_program "
			"GL_ARB_fragment_program_shadow "
			"GL_ARB_imaging "
			"GL_ARB_multisample "
			"GL_ARB_multitexture "
			"GL_ARB_occlusion_query "
			"GL_ARB_point_parameters "
			"GL_ARB_point_sprite "
			"GL_ARB_shadow "
			"GL_ARB_shadow_ambient "
			"GL_ARB_texture_border_clamp "
			"GL_ARB_texture_compression "
			"GL_ARB_texture_cube_map "
			"GL_ARB_texture_env_add "
			"GL_ARB_texture_env_combine "
			"GL_ARB_texture_env_crossbar "
			"GL_ARB_texture_env_dot3 "
			"GL_ARB_texture_mirrored_repeat "
			"GL_ARB_texture_non_power_of_two "
			"GL_ARB_transpose_matrix "
			"GL_ARB_vertex_program "
			"GL_ARB_window_pos "
			"GL_EXT_abgr "
			"GL_EXT_bgra "
 			"GL_EXT_blend_color "
			"GL_EXT_blend_equation_separate "
			"GL_EXT_blend_func_separate "
			"GL_EXT_blend_logic_op "
 			"GL_EXT_blend_minmax "
 			"GL_EXT_blend_subtract "
			"GL_EXT_clip_volume_hint "
			"GL_EXT_copy_texture "
			"GL_EXT_draw_range_elements "
			"GL_EXT_fog_coord "
			"GL_EXT_framebuffer_object "
			"GL_EXT_multi_draw_arrays "
			"GL_EXT_packed_pixels "
			"GL_EXT_paletted_texture "
			"GL_EXT_point_parameters "
			"GL_EXT_polygon_offset "
			"GL_EXT_rescale_normal "
			"GL_EXT_secondary_color "
			"GL_EXT_separate_specular_color "
			"GL_EXT_shadow_funcs "
			"GL_EXT_shared_texture_palette "
 			"GL_EXT_stencil_two_side "
			"GL_EXT_stencil_wrap "
			"GL_EXT_subtexture "
			"GL_EXT_texture "
			"GL_EXT_texture3D "
			"GL_EXT_texture_compression_dxt1 "
			"GL_EXT_texture_compression_s3tc "
			"GL_EXT_texture_edge_clamp "
 			"GL_EXT_texture_env_add "
 			"GL_EXT_texture_env_combine "
 			"GL_EXT_texture_env_dot3 "
 			"GL_EXT_texture_filter_ansiotropic "
			"GL_EXT_texture_lod "
 			"GL_EXT_texture_lod_bias "
 			"GL_EXT_texture_mirror_clamp "
			"GL_EXT_texture_object "
			"GL_EXT_texture_rectangle "
			"GL_EXT_vertex_array "
			"GL_3DFX_texture_compression_FXT1 "
			"GL_APPLE_packed_pixels "
			"GL_ATI_draw_buffers "
			"GL_ATI_texture_env_combine3 "
			"GL_ATI_texture_mirror_once "
 			"GL_HP_occlusion_test "
			"GL_IBM_texture_mirrored_repeat "
			"GL_INGR_blend_func_separate "
			"GL_MESA_pack_invert "
			"GL_MESA_ycbcr_texture "
			"GL_NV_blend_square "
			"GL_NV_depth_clamp "
			"GL_NV_fog_distance "
			"GL_NV_fragment_program "
			"GL_NV_fragment_program_option "
			"GL_NV_fragment_program2 "
			"GL_NV_light_max_exponent "
			"GL_NV_multisample_filter_hint "
			"GL_NV_point_sprite "
			"GL_NV_texgen_reflection "
			"GL_NV_texture_compression_vtc "
			"GL_NV_texture_env_combine4 "
			"GL_NV_texture_expand_normal "
			"GL_NV_texture_rectangle "
			"GL_NV_vertex_program "
			"GL_NV_vertex_program1_1 "
			"GL_NV_vertex_program2 "
			"GL_NV_vertex_program2_option "
			"GL_NV_vertex_program3 "
			"GL_OES_compressed_paletted_texture "
			"GL_SGI_color_matrix "
			"GL_SGI_color_table "
			"GL_SGIS_generate_mipmap "
			"GL_SGIS_multisample "
			"GL_SGIS_point_parameters "
			"GL_SGIS_texture_border_clamp "
			"GL_SGIS_texture_edge_clamp "
			"GL_SGIS_texture_lod "
			"GL_SGIX_depth_texture "
			"GL_SGIX_shadow "
			"GL_SGIX_shadow_ambient "
			"GL_SUN_slice_accum "
			;

/*
** We have made the simplifying assuption that the same extensions are 
** supported across all screens in a multi-screen system.
*/
static char GLXServerVendorName[] = "SGI";
static char GLXServerVersion[] = "1.2";
static char GLXServerExtensions[] =
			"GLX_ARB_multisample "
			"GLX_EXT_visual_info "
			"GLX_EXT_visual_rating "
			"GLX_EXT_import_context "
                        "GLX_EXT_texture_from_pixmap "
			"GLX_OML_swap_method "
			"GLX_SGI_make_current_read "
#ifndef __DARWIN__
			"GLX_SGIS_multisample "
                        "GLX_SGIX_hyperpipe "
                        "GLX_SGIX_swap_barrier "
#endif
			"GLX_SGIX_fbconfig "
			"GLX_MESA_copy_sub_buffer "
			;

/*
** This hook gets called when a window moves or changes size.
*/
static Bool glxPositionWindow(WindowPtr pWin, int x, int y)
{
    ScreenPtr pScreen;
    __GLXcontext *glxc;
    __GLXdrawable *glxPriv;
    Bool ret;
    __GLXscreen *pGlxScreen;

    /*
    ** Call wrapped position window routine
    */
    pScreen = pWin->drawable.pScreen;
    pGlxScreen = glxGetScreen(pScreen);
    pScreen->PositionWindow = pGlxScreen->PositionWindow;
    ret = (*pScreen->PositionWindow)(pWin, x, y);
    pScreen->PositionWindow = glxPositionWindow;

    /*
    ** Tell all contexts rendering into this window that the window size
    ** has changed.
    */
    glxPriv = (__GLXdrawable *) LookupIDByType(pWin->drawable.id,
					       __glXDrawableRes);
    if (glxPriv == NULL) {
	/*
	** This window is not being used by the OpenGL.
	*/
	return ret;
    }

    /*
    ** resize the drawable
    */
    /* first change the drawable size */
    if (glxPriv->resize(glxPriv) == GL_FALSE) {
	/* resize failed! */
	/* XXX: what can we possibly do here? */
	ret = False;
    }

    /* mark contexts as needing resize */

    for (glxc = glxPriv->drawGlxc; glxc; glxc = glxc->nextDrawPriv) {
	glxc->pendingState |= __GLX_PENDING_RESIZE;
    }

    for (glxc = glxPriv->readGlxc; glxc; glxc = glxc->nextReadPriv) {
	glxc->pendingState |= __GLX_PENDING_RESIZE;
    }

    return ret;
}

/*
 * If your DDX driver wants to register support for swap barriers or hyperpipe
 * topology, it should call __glXHyperpipeInit() or __glXSwapBarrierInit()
 * with a dispatch table of functions to handle the requests.   In the XFree86
 * DDX, for example, you would call these near the bottom of the driver's
 * ScreenInit method, after DRI has been initialized.
 *
 * This should be replaced with a better method when we teach the server how
 * to load DRI drivers.
 */

void __glXHyperpipeInit(int screen, __GLXHyperpipeExtensionFuncs *funcs)
{
    __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);

    pGlxScreen->hyperpipeFuncs = funcs;
}

void __glXSwapBarrierInit(int screen, __GLXSwapBarrierExtensionFuncs *funcs)
{
    __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);

    pGlxScreen->swapBarrierFuncs = funcs;
}

static Bool
glxCloseScreen (int index, ScreenPtr pScreen)
{
    __GLXscreen *pGlxScreen = glxGetScreen(pScreen);

    pScreen->CloseScreen = pGlxScreen->CloseScreen;
    pScreen->PositionWindow = pGlxScreen->PositionWindow;

    pGlxScreen->destroy(pGlxScreen);

    return pScreen->CloseScreen(index, pScreen);
}

__GLXscreen *
glxGetScreen(ScreenPtr pScreen)
{
    return (__GLXscreen *) pScreen->devPrivates[glxScreenPrivateIndex].ptr;
}

void GlxSetVisualConfigs(int nconfigs, 
                         __GLXvisualConfig *configs, void **privates)
{
    /* We keep this stub around for the DDX drivers that still
     * call it. */
}

static XID
findVisualForConfig(ScreenPtr pScreen, __GLcontextModes *m)
{
    int i;

    for (i = 0; i < pScreen->numVisuals; i++) {
	if (_gl_convert_to_x_visual_type(m->visualType) == pScreen->visuals[i].class)
	    return pScreen->visuals[i].vid;
    }

    return 0;
}

void __glXScreenInit(__GLXscreen *glxScreen, ScreenPtr pScreen)
{
    static int glxGeneration;
    __GLcontextModes *m;
    int i;

    if (glxGeneration != serverGeneration)
    {
	glxScreenPrivateIndex = AllocateScreenPrivateIndex ();
	if (glxScreenPrivateIndex == -1)
	    return;

	glxGeneration = serverGeneration;
    }

    i = 0;
    for (m = glxScreen->fbconfigs; m != NULL; m = m->next) {
	m->fbconfigID = i++;
	m->visualID = findVisualForConfig(pScreen, m);
	ErrorF("mapping fbconfig %d to visual 0x%02x\n",
	       m->fbconfigID, m->visualID);
    }
    glxScreen->numFBConfigs = i;

    /* Select a subset of fbconfigs that we send to the client when it
     * asks for the glx visuals.  All the fbconfigs here have a valid
     * value for visual ID and each visual ID is only present once.
     * This runs before composite adds its extra visual so we have to
     * remember the number of visuals here.*/
    glxScreen->visuals = NULL;
    glxScreen->numVisuals = 0;

    glxScreen->pScreen       = pScreen;
    glxScreen->GLextensions  = xstrdup(GLServerExtensions);
    glxScreen->GLXvendor     = xstrdup(GLXServerVendorName);
    glxScreen->GLXversion    = xstrdup(GLXServerVersion);
    glxScreen->GLXextensions = xstrdup(GLXServerExtensions);

    glxScreen->PositionWindow = pScreen->PositionWindow;
    pScreen->PositionWindow = glxPositionWindow;
 
    glxScreen->CloseScreen = pScreen->CloseScreen;
    pScreen->CloseScreen = glxCloseScreen;

    pScreen->devPrivates[glxScreenPrivateIndex].ptr = (pointer) glxScreen;
}
 
void __glXScreenDestroy(__GLXscreen *screen)
{
    xfree(screen->GLXvendor);
    xfree(screen->GLXversion);
    xfree(screen->GLXextensions);
    xfree(screen->GLextensions);
}