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xserver-multidpi/glx/glxscreens.c
Adam Jackson b08526eecf glx: Implement GLX_EXT_libglvnd (v2) 
For the dri2 backend, we depend on xfree86 already, so we can walk the
options for the screen looking for a vendor string from xorg.conf.  For
the swrast backend we don't have that luxury, so just say mesa.  This
extension isn't really meaningful on Windows or OSX yet (since libglvnd
isn't really functional there yet), so on those platforms we don't say
anything and return BadValue for the token from QueryServerString.

v2: Use xnf* allocators when parsing options (Eric and Emil)

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
2016-03-30 11:13:57 -04:00

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/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <GL/glxtokens.h>
#include <string.h>
#include <windowstr.h>
#include <os.h>
#include <colormapst.h>
#include "privates.h"
#include "glxserver.h"
#include "glxutil.h"
#include "glxext.h"
#include "protocol-versions.h"
static DevPrivateKeyRec glxScreenPrivateKeyRec;
#define glxScreenPrivateKey (&glxScreenPrivateKeyRec)
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_anisotropic "
"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_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_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 ";
static Bool
glxCloseScreen(ScreenPtr pScreen)
{
__GLXscreen *pGlxScreen = glxGetScreen(pScreen);
pScreen->CloseScreen = pGlxScreen->CloseScreen;
pGlxScreen->destroy(pGlxScreen);
return pScreen->CloseScreen(pScreen);
}
__GLXscreen *
glxGetScreen(ScreenPtr pScreen)
{
return dixLookupPrivate(&pScreen->devPrivates, glxScreenPrivateKey);
}
_X_EXPORT void
GlxSetVisualConfigs(int nconfigs, void *configs, void **privates)
{
/* We keep this stub around for the DDX drivers that still
* call it. */
}
GLint
glxConvertToXVisualType(int visualType)
{
static const int x_visual_types[] = {
TrueColor, DirectColor,
PseudoColor, StaticColor,
GrayScale, StaticGray
};
return ((unsigned) (visualType - GLX_TRUE_COLOR) < 6)
? x_visual_types[visualType - GLX_TRUE_COLOR] : -1;
}
/* This code inspired by composite/compinit.c. We could move this to
* mi/ and share it with composite.*/
static VisualPtr
AddScreenVisuals(ScreenPtr pScreen, int count, int d)
{
int i;
DepthPtr depth;
depth = NULL;
for (i = 0; i < pScreen->numDepths; i++) {
if (pScreen->allowedDepths[i].depth == d) {
depth = &pScreen->allowedDepths[i];
break;
}
}
if (depth == NULL)
return NULL;
if (ResizeVisualArray(pScreen, count, depth) == FALSE)
return NULL;
/* Return a pointer to the first of the added visuals. */
return pScreen->visuals + pScreen->numVisuals - count;
}
static int
findFirstSet(unsigned int v)
{
int i;
for (i = 0; i < 32; i++)
if (v & (1 << i))
return i;
return -1;
}
static void
initGlxVisual(VisualPtr visual, __GLXconfig * config)
{
int maxBits;
maxBits = max(config->redBits, max(config->greenBits, config->blueBits));
config->visualID = visual->vid;
visual->class = glxConvertToXVisualType(config->visualType);
visual->bitsPerRGBValue = maxBits;
visual->ColormapEntries = 1 << maxBits;
visual->nplanes = config->redBits + config->greenBits + config->blueBits;
visual->redMask = config->redMask;
visual->greenMask = config->greenMask;
visual->blueMask = config->blueMask;
visual->offsetRed = findFirstSet(config->redMask);
visual->offsetGreen = findFirstSet(config->greenMask);
visual->offsetBlue = findFirstSet(config->blueMask);
}
static __GLXconfig *
pickFBConfig(__GLXscreen * pGlxScreen, VisualPtr visual)
{
__GLXconfig *best = NULL, *config;
int best_score = 0;
for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
int score = 0;
if (config->redMask != visual->redMask ||
config->greenMask != visual->greenMask ||
config->blueMask != visual->blueMask)
continue;
if (config->visualRating != GLX_NONE)
continue;
/* Ignore multisampled configs */
if (config->sampleBuffers)
continue;
if (glxConvertToXVisualType(config->visualType) != visual->class)
continue;
/* If it's the 32-bit RGBA visual, demand a 32-bit fbconfig. */
if (visual->nplanes == 32 && config->rgbBits != 32)
continue;
/* Can't use the same FBconfig for multiple X visuals. I think. */
if (config->visualID != 0)
continue;
if (config->doubleBufferMode > 0)
score += 8;
if (config->depthBits > 0)
score += 4;
if (config->stencilBits > 0)
score += 2;
if (config->alphaBits > 0)
score++;
if (score > best_score) {
best = config;
best_score = score;
}
}
return best;
}
void
__glXScreenInit(__GLXscreen * pGlxScreen, ScreenPtr pScreen)
{
__GLXconfig *m;
__GLXconfig *config;
int i;
if (!dixRegisterPrivateKey(&glxScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
return;
pGlxScreen->pScreen = pScreen;
pGlxScreen->GLextensions = strdup(GLServerExtensions);
pGlxScreen->GLXextensions = NULL;
pGlxScreen->CloseScreen = pScreen->CloseScreen;
pScreen->CloseScreen = glxCloseScreen;
i = 0;
for (m = pGlxScreen->fbconfigs; m != NULL; m = m->next) {
m->fbconfigID = FakeClientID(0);
m->visualID = 0;
i++;
}
pGlxScreen->numFBConfigs = i;
pGlxScreen->visuals =
calloc(pGlxScreen->numFBConfigs, sizeof(__GLXconfig *));
/* First, try to choose featureful FBconfigs for the existing X visuals.
* Note that if multiple X visuals end up with the same FBconfig being
* chosen, the later X visuals don't get GLX visuals (because we want to
* prioritize the root visual being GLX).
*/
for (i = 0; i < pScreen->numVisuals; i++) {
VisualPtr visual = &pScreen->visuals[i];
config = pickFBConfig(pGlxScreen, visual);
if (config) {
pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
config->visualID = visual->vid;
}
}
/* Then, add new visuals corresponding to all FBconfigs that didn't have
* an existing, appropriate visual.
*/
for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
int depth;
VisualPtr visual;
if (config->visualID != 0)
continue;
/* Only count RGB bits and not alpha, as we're not trying to create
* visuals for compositing (that's what the 32-bit composite visual
* set up above is for.
*/
depth = config->redBits + config->greenBits + config->blueBits;
/* Make sure that our FBconfig's depth can actually be displayed
* (corresponds to an existing visual).
*/
for (i = 0; i < pScreen->numVisuals; i++) {
if (depth == pScreen->visuals[i].nplanes)
break;
}
/* if it can't, fix up the fbconfig to not advertise window support */
if (i == pScreen->numVisuals)
config->drawableType &= ~(GLX_WINDOW_BIT);
/* fbconfig must support window drawables */
if (!(config->drawableType & GLX_WINDOW_BIT)) {
config->visualID = 0;
continue;
}
/* Create a new X visual for our FBconfig. */
visual = AddScreenVisuals(pScreen, 1, depth);
if (visual == NULL)
continue;
pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
initGlxVisual(visual, config);
}
dixSetPrivate(&pScreen->devPrivates, glxScreenPrivateKey, pGlxScreen);
if (pGlxScreen->glvnd)
__glXEnableExtension(pGlxScreen->glx_enable_bits, "GLX_EXT_libglvnd");
i = __glXGetExtensionString(pGlxScreen->glx_enable_bits, NULL);
if (i > 0) {
pGlxScreen->GLXextensions = xnfalloc(i);
(void) __glXGetExtensionString(pGlxScreen->glx_enable_bits,
pGlxScreen->GLXextensions);
}
}
void
__glXScreenDestroy(__GLXscreen * screen)
{
free(screen->glvnd);
free(screen->GLXextensions);
free(screen->GLextensions);
free(screen->visuals);
}
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