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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:46:25 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:46:25 +0200
commit844a4094f098684dd1da5bc11e73479fb61373a3 (patch)
tree5441f02930e1658777a262f3d3647d64f99cde22 /nx-X11/programs/Xserver/GL/mesa/X/xf86glx.c.X.original
parentf4092abdf94af6a99aff944d6264bc1284e8bdd4 (diff)
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Imported nx-X11-3.1.0-3.tar.gznx-X11/3.1.0-3
Summary: Imported nx-X11-3.1.0-3.tar.gz Keywords: Imported nx-X11-3.1.0-3.tar.gz into Git repository
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@@ -0,0 +1,914 @@
+/* $XFree86: xc/programs/Xserver/GL/mesa/src/X/xf86glx.c,v 1.19 2003/07/16 01:38:27 dawes Exp $ */
+/**************************************************************************
+
+Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
+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, sub license, 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 and this permission notice (including the
+next paragraph) 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 NON-INFRINGEMENT.
+IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
+
+**************************************************************************/
+
+/*
+ * Authors:
+ * Kevin E. Martin <kevin@precisioninsight.com>
+ * Brian E. Paul <brian@precisioninsight.com>
+ *
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <regionstr.h>
+#include <resource.h>
+#include <GL/gl.h>
+#include <GL/glxint.h>
+#include <GL/glxtokens.h>
+#include <scrnintstr.h>
+#include <config.h>
+#include <glxserver.h>
+#include <glxscreens.h>
+#include <glxdrawable.h>
+#include <glxcontext.h>
+#include <glxext.h>
+#include <glxutil.h>
+#include "xf86glxint.h"
+#include "context.h"
+#include "xmesaP.h"
+#include <GL/xf86glx.h>
+#include "context.h"
+
+/*
+ * This define is for the glcore.h header file.
+ * If you add it here, then make sure you also add it in
+ * ../../../glx/Imakefile.
+ */
+#if 0
+#define DEBUG
+#include <GL/internal/glcore.h>
+#undef DEBUG
+#else
+#include <GL/internal/glcore.h>
+#endif
+
+#include "glcontextmodes.h"
+
+/*
+ * This structure is statically allocated in the __glXScreens[]
+ * structure. This struct is not used anywhere other than in
+ * __glXScreenInit to initialize each of the active screens
+ * (__glXActiveScreens[]). Several of the fields must be initialized by
+ * the screenProbe routine before they are copied to the active screens
+ * struct. In particular, the contextCreate, pGlxVisual, numVisuals,
+ * and numUsableVisuals fields must be initialized.
+ */
+static __GLXscreenInfo __glDDXScreenInfo = {
+ __MESA_screenProbe, /* Must be generic and handle all screens */
+ __MESA_createContext, /* Substitute screen's createContext routine */
+ __MESA_createBuffer, /* Substitute screen's createBuffer routine */
+ NULL, /* Set up modes in probe */
+ NULL, /* Set up pVisualPriv in probe */
+ 0, /* Set up numVisuals in probe */
+ 0, /* Set up numUsableVisuals in probe */
+ NULL, /* GLextensions is overwritten by __glXScreenInit */
+ "Vendor String", /* GLXvendor is overwritten by __glXScreenInit */
+ "Version String", /* GLXversion is overwritten by __glXScreenInit */
+ "Extensions String", /* GLXextensions is overwritten by __glXScreenInit */
+ NULL /* WrappedPositionWindow is overwritten */
+};
+
+void *__glXglDDXScreenInfo(void) {
+ return &__glDDXScreenInfo;
+}
+
+static __GLXextensionInfo __glDDXExtensionInfo = {
+ GL_CORE_MESA,
+ __MESA_resetExtension,
+ __MESA_initVisuals,
+ __MESA_setVisualConfigs
+};
+
+void *__glXglDDXExtensionInfo(void) {
+ return &__glDDXExtensionInfo;
+}
+
+static __MESA_screen MESAScreens[MAXSCREENS];
+static __GLcontext *MESA_CC = NULL;
+
+static int numConfigs = 0;
+static __GLXvisualConfig *visualConfigs = NULL;
+static void **visualPrivates = NULL;
+
+
+static int count_bits(unsigned int n)
+{
+ int bits = 0;
+
+ while (n > 0) {
+ if (n & 1) bits++;
+ n >>= 1;
+ }
+ return bits;
+}
+
+
+static XMesaVisual find_mesa_visual(int screen, VisualID vid)
+{
+ __MESA_screen * const pMScr = &MESAScreens[screen];
+ const __GLcontextModes *modes;
+ unsigned i = 0;
+
+ for ( modes = pMScr->modes ; modes != NULL ; modes = modes->next ) {
+ if ( modes->visualID == vid ) {
+ break;
+ }
+
+ i++;
+ }
+
+ return (modes != NULL) ? pMScr->xm_vis[i] : NULL;
+}
+
+
+/*
+ * In the case the driver defines no GLX visuals we'll use these.
+ * Note that for TrueColor and DirectColor visuals, bufferSize is the
+ * sum of redSize, greenSize, blueSize and alphaSize, which may be larger
+ * than the nplanes/rootDepth of the server's X11 visuals
+ */
+#define NUM_FALLBACK_CONFIGS 5
+static __GLXvisualConfig FallbackConfigs[NUM_FALLBACK_CONFIGS] = {
+ /* [0] = RGB, double buffered, Z */
+ {
+ -1, /* vid */
+ -1, /* class */
+ True, /* rgba */
+ -1, -1, -1, 0, /* rgba sizes */
+ -1, -1, -1, 0, /* rgba masks */
+ 0, 0, 0, 0, /* rgba accum sizes */
+ True, /* doubleBuffer */
+ False, /* stereo */
+ -1, /* bufferSize */
+ 16, /* depthSize */
+ 0, /* stencilSize */
+ 0, /* auxBuffers */
+ 0, /* level */
+ GLX_NONE, /* visualRating */
+ GLX_NONE, /* transparentPixel */
+ 0, 0, 0, 0, /* transparent rgba color (floats scaled to ints) */
+ 0 /* transparentIndex */
+ },
+ /* [1] = RGB, double buffered, Z, stencil, accum */
+ {
+ -1, /* vid */
+ -1, /* class */
+ True, /* rgba */
+ -1, -1, -1, 0, /* rgba sizes */
+ -1, -1, -1, 0, /* rgba masks */
+ 16, 16, 16, 0, /* rgba accum sizes */
+ True, /* doubleBuffer */
+ False, /* stereo */
+ -1, /* bufferSize */
+ 16, /* depthSize */
+ 8, /* stencilSize */
+ 0, /* auxBuffers */
+ 0, /* level */
+ GLX_NONE, /* visualRating */
+ GLX_NONE, /* transparentPixel */
+ 0, 0, 0, 0, /* transparent rgba color (floats scaled to ints) */
+ 0 /* transparentIndex */
+ },
+ /* [2] = RGB+Alpha, double buffered, Z, stencil, accum */
+ {
+ -1, /* vid */
+ -1, /* class */
+ True, /* rgba */
+ -1, -1, -1, 8, /* rgba sizes */
+ -1, -1, -1, -1, /* rgba masks */
+ 16, 16, 16, 16, /* rgba accum sizes */
+ True, /* doubleBuffer */
+ False, /* stereo */
+ -1, /* bufferSize */
+ 16, /* depthSize */
+ 8, /* stencilSize */
+ 0, /* auxBuffers */
+ 0, /* level */
+ GLX_NONE, /* visualRating */
+ GLX_NONE, /* transparentPixel */
+ 0, 0, 0, 0, /* transparent rgba color (floats scaled to ints) */
+ 0 /* transparentIndex */
+ },
+ /* [3] = RGB+Alpha, single buffered, Z, stencil, accum */
+ {
+ -1, /* vid */
+ -1, /* class */
+ True, /* rgba */
+ -1, -1, -1, 8, /* rgba sizes */
+ -1, -1, -1, -1, /* rgba masks */
+ 16, 16, 16, 16, /* rgba accum sizes */
+ False, /* doubleBuffer */
+ False, /* stereo */
+ -1, /* bufferSize */
+ 16, /* depthSize */
+ 8, /* stencilSize */
+ 0, /* auxBuffers */
+ 0, /* level */
+ GLX_NONE, /* visualRating */
+ GLX_NONE, /* transparentPixel */
+ 0, 0, 0, 0, /* transparent rgba color (floats scaled to ints) */
+ 0 /* transparentIndex */
+ },
+ /* [4] = CI, double buffered, Z */
+ {
+ -1, /* vid */
+ -1, /* class */
+ False, /* rgba? (false = color index) */
+ -1, -1, -1, 0, /* rgba sizes */
+ -1, -1, -1, 0, /* rgba masks */
+ 0, 0, 0, 0, /* rgba accum sizes */
+ True, /* doubleBuffer */
+ False, /* stereo */
+ -1, /* bufferSize */
+ 16, /* depthSize */
+ 0, /* stencilSize */
+ 0, /* auxBuffers */
+ 0, /* level */
+ GLX_NONE, /* visualRating */
+ GLX_NONE, /* transparentPixel */
+ 0, 0, 0, 0, /* transparent rgba color (floats scaled to ints) */
+ 0 /* transparentIndex */
+ },
+};
+
+
+static Bool init_visuals(int *nvisualp, VisualPtr *visualp,
+ VisualID *defaultVisp,
+ int ndepth, DepthPtr pdepth,
+ int rootDepth)
+{
+ int numRGBconfigs;
+ int numCIconfigs;
+ int numVisuals = *nvisualp;
+ int numNewVisuals;
+ int numNewConfigs;
+ VisualPtr pVisual = *visualp;
+ VisualPtr pVisualNew = NULL;
+ VisualID *orig_vid = NULL;
+ __GLcontextModes *modes;
+ __GLXvisualConfig *pNewVisualConfigs = NULL;
+ void **glXVisualPriv;
+ void **pNewVisualPriv;
+ int found_default;
+ int i, j, k;
+
+ if (numConfigs > 0)
+ numNewConfigs = numConfigs;
+ else
+ numNewConfigs = NUM_FALLBACK_CONFIGS;
+
+ /* Alloc space for the list of new GLX visuals */
+ pNewVisualConfigs = (__GLXvisualConfig *)
+ __glXMalloc(numNewConfigs * sizeof(__GLXvisualConfig));
+ if (!pNewVisualConfigs) {
+ return FALSE;
+ }
+
+ /* Alloc space for the list of new GLX visual privates */
+ pNewVisualPriv = (void **) __glXMalloc(numNewConfigs * sizeof(void *));
+ if (!pNewVisualPriv) {
+ __glXFree(pNewVisualConfigs);
+ return FALSE;
+ }
+
+ /*
+ ** If SetVisualConfigs was not called, then use default GLX
+ ** visual configs.
+ */
+ if (numConfigs == 0) {
+ memcpy(pNewVisualConfigs, FallbackConfigs,
+ NUM_FALLBACK_CONFIGS * sizeof(__GLXvisualConfig));
+ memset(pNewVisualPriv, 0, NUM_FALLBACK_CONFIGS * sizeof(void *));
+ }
+ else {
+ /* copy driver's visual config info */
+ for (i = 0; i < numConfigs; i++) {
+ pNewVisualConfigs[i] = visualConfigs[i];
+ pNewVisualPriv[i] = visualPrivates[i];
+ }
+ }
+
+ /* Count the number of RGB and CI visual configs */
+ numRGBconfigs = 0;
+ numCIconfigs = 0;
+ for (i = 0; i < numNewConfigs; i++) {
+ if (pNewVisualConfigs[i].rgba)
+ numRGBconfigs++;
+ else
+ numCIconfigs++;
+ }
+
+ /* Count the total number of visuals to compute */
+ numNewVisuals = 0;
+ for (i = 0; i < numVisuals; i++) {
+ numNewVisuals +=
+ (pVisual[i].class == TrueColor || pVisual[i].class == DirectColor)
+ ? numRGBconfigs : numCIconfigs;
+ }
+
+ /* Reset variables for use with the next screen/driver's visual configs */
+ visualConfigs = NULL;
+ numConfigs = 0;
+
+ /* Alloc temp space for the list of orig VisualIDs for each new visual */
+ orig_vid = (VisualID *)__glXMalloc(numNewVisuals * sizeof(VisualID));
+ if (!orig_vid) {
+ __glXFree(pNewVisualPriv);
+ __glXFree(pNewVisualConfigs);
+ return FALSE;
+ }
+
+ /* Alloc space for the list of glXVisuals */
+ modes = _gl_context_modes_create(numNewVisuals, sizeof(__GLcontextModes));
+ if (modes == NULL) {
+ __glXFree(orig_vid);
+ __glXFree(pNewVisualPriv);
+ __glXFree(pNewVisualConfigs);
+ return FALSE;
+ }
+
+ /* Alloc space for the list of glXVisualPrivates */
+ glXVisualPriv = (void **)__glXMalloc(numNewVisuals * sizeof(void *));
+ if (!glXVisualPriv) {
+ _gl_context_modes_destroy( modes );
+ __glXFree(orig_vid);
+ __glXFree(pNewVisualPriv);
+ __glXFree(pNewVisualConfigs);
+ return FALSE;
+ }
+
+ /* Alloc space for the new list of the X server's visuals */
+ pVisualNew = (VisualPtr)__glXMalloc(numNewVisuals * sizeof(VisualRec));
+ if (!pVisualNew) {
+ __glXFree(glXVisualPriv);
+ _gl_context_modes_destroy( modes );
+ __glXFree(orig_vid);
+ __glXFree(pNewVisualPriv);
+ __glXFree(pNewVisualConfigs);
+ return FALSE;
+ }
+
+ /* Initialize the new visuals */
+ found_default = FALSE;
+ MESAScreens[screenInfo.numScreens-1].modes = modes;
+ for (i = j = 0; i < numVisuals; i++) {
+ int is_rgb = (pVisual[i].class == TrueColor ||
+ pVisual[i].class == DirectColor);
+
+ for (k = 0; k < numNewConfigs; k++) {
+ if (pNewVisualConfigs[k].rgba != is_rgb)
+ continue;
+
+ assert( modes != NULL );
+
+ /* Initialize the new visual */
+ pVisualNew[j] = pVisual[i];
+ pVisualNew[j].vid = FakeClientID(0);
+
+ /* Check for the default visual */
+ if (!found_default && pVisual[i].vid == *defaultVisp) {
+ *defaultVisp = pVisualNew[j].vid;
+ found_default = TRUE;
+ }
+
+ /* Save the old VisualID */
+ orig_vid[j] = pVisual[i].vid;
+
+ /* Initialize the glXVisual */
+ _gl_copy_visual_to_context_mode( modes, & pNewVisualConfigs[k] );
+ modes->visualID = pVisualNew[j].vid;
+
+ /*
+ * If the class is -1, then assume the X visual information
+ * is identical to what GLX needs, and take them from the X
+ * visual. NOTE: if class != -1, then all other fields MUST
+ * be initialized.
+ */
+ if (modes->visualType == GLX_NONE) {
+ modes->visualType = _gl_convert_from_x_visual_type( pVisual[i].class );
+ modes->redBits = count_bits(pVisual[i].redMask);
+ modes->greenBits = count_bits(pVisual[i].greenMask);
+ modes->blueBits = count_bits(pVisual[i].blueMask);
+ modes->alphaBits = modes->alphaBits;
+ modes->redMask = pVisual[i].redMask;
+ modes->greenMask = pVisual[i].greenMask;
+ modes->blueMask = pVisual[i].blueMask;
+ modes->alphaMask = modes->alphaMask;
+ modes->rgbBits = (is_rgb)
+ ? (modes->redBits + modes->greenBits +
+ modes->blueBits + modes->alphaBits)
+ : rootDepth;
+ }
+
+ /* Save the device-dependent private for this visual */
+ glXVisualPriv[j] = pNewVisualPriv[k];
+
+ j++;
+ modes = modes->next;
+ }
+ }
+
+ assert(j <= numNewVisuals);
+
+ /* Save the GLX visuals in the screen structure */
+ MESAScreens[screenInfo.numScreens-1].num_vis = numNewVisuals;
+ MESAScreens[screenInfo.numScreens-1].private = glXVisualPriv;
+
+ /* Set up depth's VisualIDs */
+ for (i = 0; i < ndepth; i++) {
+ int numVids = 0;
+ VisualID *pVids = NULL;
+ int k, n = 0;
+
+ /* Count the new number of VisualIDs at this depth */
+ for (j = 0; j < pdepth[i].numVids; j++)
+ for (k = 0; k < numNewVisuals; k++)
+ if (pdepth[i].vids[j] == orig_vid[k])
+ numVids++;
+
+ /* Allocate a new list of VisualIDs for this depth */
+ pVids = (VisualID *)__glXMalloc(numVids * sizeof(VisualID));
+
+ /* Initialize the new list of VisualIDs for this depth */
+ for (j = 0; j < pdepth[i].numVids; j++)
+ for (k = 0; k < numNewVisuals; k++)
+ if (pdepth[i].vids[j] == orig_vid[k])
+ pVids[n++] = pVisualNew[k].vid;
+
+ /* Update this depth's list of VisualIDs */
+ __glXFree(pdepth[i].vids);
+ pdepth[i].vids = pVids;
+ pdepth[i].numVids = numVids;
+ }
+
+ /* Update the X server's visuals */
+ *nvisualp = numNewVisuals;
+ *visualp = pVisualNew;
+
+ /* Free the old list of the X server's visuals */
+ __glXFree(pVisual);
+
+ /* Clean up temporary allocations */
+ __glXFree(orig_vid);
+ __glXFree(pNewVisualPriv);
+ __glXFree(pNewVisualConfigs);
+
+ /* Free the private list created by DDX HW driver */
+ if (visualPrivates)
+ xfree(visualPrivates);
+ visualPrivates = NULL;
+
+ return TRUE;
+}
+
+void __MESA_setVisualConfigs(int nconfigs, __GLXvisualConfig *configs,
+ void **privates)
+{
+ numConfigs = nconfigs;
+ visualConfigs = configs;
+ visualPrivates = privates;
+}
+
+Bool __MESA_initVisuals(VisualPtr *visualp, DepthPtr *depthp,
+ int *nvisualp, int *ndepthp, int *rootDepthp,
+ VisualID *defaultVisp, unsigned long sizes,
+ int bitsPerRGB)
+{
+ /*
+ * Setup the visuals supported by this particular screen.
+ */
+ return init_visuals(nvisualp, visualp, defaultVisp,
+ *ndepthp, *depthp, *rootDepthp);
+}
+
+static void fixup_visuals(int screen)
+{
+ ScreenPtr pScreen = screenInfo.screens[screen];
+ __MESA_screen *pMScr = &MESAScreens[screen];
+ int j;
+ __GLcontextModes *modes;
+
+ for ( modes = pMScr->modes ; modes != NULL ; modes = modes->next ) {
+ const int vis_class = _gl_convert_to_x_visual_type( modes->visualType );
+ const int nplanes = (modes->rgbBits - modes->alphaBits);
+ const VisualPtr pVis = pScreen->visuals;
+
+ /* Find a visual that matches the GLX visual's class and size */
+ for (j = 0; j < pScreen->numVisuals; j++) {
+ if (pVis[j].class == vis_class &&
+ pVis[j].nplanes == nplanes) {
+
+ /* Fixup the masks */
+ modes->redMask = pVis[j].redMask;
+ modes->greenMask = pVis[j].greenMask;
+ modes->blueMask = pVis[j].blueMask;
+
+ /* Recalc the sizes */
+ modes->redBits = count_bits(modes->redMask);
+ modes->greenBits = count_bits(modes->greenMask);
+ modes->blueBits = count_bits(modes->blueMask);
+ }
+ }
+ }
+}
+
+static void init_screen_visuals(int screen)
+{
+ ScreenPtr pScreen = screenInfo.screens[screen];
+ __GLcontextModes *modes;
+ XMesaVisual *pXMesaVisual;
+ int *used;
+ int i, j;
+
+ /* Alloc space for the list of XMesa visuals */
+ pXMesaVisual = (XMesaVisual *)__glXMalloc(MESAScreens[screen].num_vis *
+ sizeof(XMesaVisual));
+ __glXMemset(pXMesaVisual, 0,
+ MESAScreens[screen].num_vis * sizeof(XMesaVisual));
+
+ /* FIXME: Change 'used' to be a array of bits (rather than of ints),
+ * FIXME: create a stack array of 8 or 16 bytes. If 'numVisuals' is less
+ * FIXME: than 64 or 128 the stack array can be used instead of calling
+ * FIXME: __glXMalloc / __glXFree. If nothing else, convert 'used' to
+ * FIXME: array of bytes instead of ints!
+ */
+ used = (int *)__glXMalloc(pScreen->numVisuals * sizeof(int));
+ __glXMemset(used, 0, pScreen->numVisuals * sizeof(int));
+
+ i = 0;
+ for ( modes = MESAScreens[screen].modes
+ ; modes != NULL
+ ; modes = modes->next ) {
+ const int vis_class = _gl_convert_to_x_visual_type( modes->visualType );
+ const int nplanes = (modes->rgbBits - modes->alphaBits);
+ const VisualPtr pVis = pScreen->visuals;
+
+ for (j = 0; j < pScreen->numVisuals; j++) {
+ if (pVis[j].class == vis_class &&
+ pVis[j].nplanes == nplanes &&
+ pVis[j].redMask == modes->redMask &&
+ pVis[j].greenMask == modes->greenMask &&
+ pVis[j].blueMask == modes->blueMask &&
+ !used[j]) {
+
+ /* Create the XMesa visual */
+ pXMesaVisual[i] =
+ XMesaCreateVisual(pScreen,
+ pVis,
+ modes->rgbMode,
+ (modes->alphaBits > 0),
+ modes->doubleBufferMode,
+ modes->stereoMode,
+ GL_TRUE, /* ximage_flag */
+ modes->depthBits,
+ modes->stencilBits,
+ modes->accumRedBits,
+ modes->accumGreenBits,
+ modes->accumBlueBits,
+ modes->accumAlphaBits,
+ modes->samples,
+ modes->level,
+ modes->visualRating);
+ /* Set the VisualID */
+ modes->visualID = pVis[j].vid;
+
+ /* Mark this visual used */
+ used[j] = 1;
+ break;
+ }
+ }
+
+ if ( j == pScreen->numVisuals ) {
+ ErrorF("No matching visual for __GLcontextMode with "
+ "visual class = %d (%d), nplanes = %u\n",
+ vis_class,
+ modes->visualType,
+ (modes->rgbBits - modes->alphaBits) );
+ }
+ else if ( modes->visualID == -1 ) {
+ FatalError( "Matching visual found, but visualID still -1!\n" );
+ }
+
+ i++;
+ }
+
+ __glXFree(used);
+
+ MESAScreens[screen].xm_vis = pXMesaVisual;
+}
+
+Bool __MESA_screenProbe(int screen)
+{
+ /*
+ * Set up the current screen's visuals.
+ */
+ __glDDXScreenInfo.modes = MESAScreens[screen].modes;
+ __glDDXScreenInfo.pVisualPriv = MESAScreens[screen].private;
+ __glDDXScreenInfo.numVisuals =
+ __glDDXScreenInfo.numUsableVisuals = MESAScreens[screen].num_vis;
+
+ /*
+ * Set the current screen's createContext routine. This could be
+ * wrapped by a DDX GLX context creation routine.
+ */
+ __glDDXScreenInfo.createContext = __MESA_createContext;
+
+ /*
+ * The ordering of the rgb compenents might have been changed by the
+ * driver after mi initialized them.
+ */
+ fixup_visuals(screen);
+
+ /*
+ * Find the GLX visuals that are supported by this screen and create
+ * XMesa's visuals.
+ */
+ init_screen_visuals(screen);
+
+ return TRUE;
+}
+
+extern void __MESA_resetExtension(void)
+{
+ int i, j;
+
+ XMesaReset();
+
+ for (i = 0; i < screenInfo.numScreens; i++) {
+ for (j = 0; j < MESAScreens[i].num_vis; j++) {
+ if (MESAScreens[i].xm_vis[j]) {
+ XMesaDestroyVisual(MESAScreens[i].xm_vis[j]);
+ MESAScreens[i].xm_vis[j] = NULL;
+ }
+ }
+ _gl_context_modes_destroy( MESAScreens[i].modes );
+ MESAScreens[i].modes = NULL;
+ __glXFree(MESAScreens[i].private);
+ MESAScreens[i].private = NULL;
+ __glXFree(MESAScreens[i].xm_vis);
+ MESAScreens[i].xm_vis = NULL;
+ MESAScreens[i].num_vis = 0;
+ }
+ __glDDXScreenInfo.modes = NULL;
+ MESA_CC = NULL;
+}
+
+void __MESA_createBuffer(__GLXdrawablePrivate *glxPriv)
+{
+ DrawablePtr pDraw = glxPriv->pDraw;
+ XMesaVisual xm_vis = find_mesa_visual(pDraw->pScreen->myNum,
+ glxPriv->modes->visualID);
+ __GLdrawablePrivate *glPriv = &glxPriv->glPriv;
+ __MESA_buffer buf;
+
+ if (xm_vis == NULL) {
+ ErrorF("find_mesa_visual returned NULL for visualID = 0x%04x\n",
+ glxPriv->modes->visualID);
+ }
+ buf = (__MESA_buffer)__glXMalloc(sizeof(struct __MESA_bufferRec));
+
+ /* Create Mesa's buffers */
+ if (glxPriv->type == DRAWABLE_WINDOW) {
+ buf->xm_buf = (void *)XMesaCreateWindowBuffer(xm_vis,
+ (WindowPtr)pDraw);
+ } else {
+ buf->xm_buf = (void *)XMesaCreatePixmapBuffer(xm_vis,
+ (PixmapPtr)pDraw, 0);
+ }
+
+ /* Wrap the front buffer's resize routine */
+ buf->fbresize = glPriv->frontBuffer.resize;
+ glPriv->frontBuffer.resize = __MESA_resizeBuffers;
+
+ /* Wrap the swap buffers routine */
+ buf->fbswap = glxPriv->swapBuffers;
+ glxPriv->swapBuffers = __MESA_swapBuffers;
+
+ /* Save Mesa's private buffer structure */
+ glPriv->private = (void *)buf;
+ glPriv->freePrivate = __MESA_destroyBuffer;
+}
+
+GLboolean __MESA_resizeBuffers(__GLdrawableBuffer *buffer,
+ GLint x, GLint y,
+ GLuint width, GLuint height,
+ __GLdrawablePrivate *glPriv,
+ GLuint bufferMask)
+{
+ __MESA_buffer buf = (__MESA_buffer)glPriv->private;
+
+ if (buf->xm_buf)
+ XMesaResizeBuffers(buf->xm_buf);
+
+ return (*buf->fbresize)(buffer, x, y, width, height, glPriv, bufferMask);
+}
+
+GLboolean __MESA_swapBuffers(__GLXdrawablePrivate *glxPriv)
+{
+ __MESA_buffer buf = (__MESA_buffer)glxPriv->glPriv.private;
+
+ /*
+ ** Do not call the wrapped swap buffers routine since Mesa has
+ ** already done the swap.
+ */
+ XMesaSwapBuffers(buf->xm_buf);
+
+ return GL_TRUE;
+}
+
+void __MESA_destroyBuffer(__GLdrawablePrivate *glPriv)
+{
+ __MESA_buffer buf = (__MESA_buffer)glPriv->private;
+ __GLXdrawablePrivate *glxPriv = (__GLXdrawablePrivate *)glPriv->other;
+
+ /* Destroy Mesa's buffers */
+ if (buf->xm_buf)
+ XMesaDestroyBuffer(buf->xm_buf);
+
+ /* Unwrap these routines */
+ glxPriv->swapBuffers = buf->fbswap;
+ glPriv->frontBuffer.resize = buf->fbresize;
+
+ __glXFree(glPriv->private);
+ glPriv->private = NULL;
+}
+
+__GLinterface *__MESA_createContext(__GLimports *imports,
+ __GLcontextModes *modes,
+ __GLinterface *shareGC)
+{
+ __GLcontext *gl_ctx = NULL;
+ __GLcontext *m_share = NULL;
+ __GLXcontext *glxc = (__GLXcontext *)imports->other;
+ XMesaVisual xm_vis;
+
+ if (shareGC)
+ m_share = (__GLcontext *)shareGC;
+
+ xm_vis = find_mesa_visual(glxc->pScreen->myNum, glxc->modes->visualID);
+ if (xm_vis) {
+ XMesaContext xmshare = m_share ? m_share->DriverCtx : 0;
+ XMesaContext xmctx = XMesaCreateContext(xm_vis, xmshare);
+ gl_ctx = xmctx ? &xmctx->mesa : 0;
+ }
+ else {
+ ErrorF("find_mesa_visual returned NULL for visualID = 0x%04x\n",
+ glxc->modes->visualID);
+ }
+
+
+ if (!gl_ctx)
+ return NULL;
+
+ gl_ctx->imports = *imports;
+ gl_ctx->exports.destroyContext = __MESA_destroyContext;
+ gl_ctx->exports.loseCurrent = __MESA_loseCurrent;
+ gl_ctx->exports.makeCurrent = __MESA_makeCurrent;
+ gl_ctx->exports.shareContext = __MESA_shareContext;
+ gl_ctx->exports.copyContext = __MESA_copyContext;
+ gl_ctx->exports.forceCurrent = __MESA_forceCurrent;
+ gl_ctx->exports.notifyResize = __MESA_notifyResize;
+ gl_ctx->exports.notifyDestroy = __MESA_notifyDestroy;
+ gl_ctx->exports.notifySwapBuffers = __MESA_notifySwapBuffers;
+ gl_ctx->exports.dispatchExec = __MESA_dispatchExec;
+ gl_ctx->exports.beginDispatchOverride = __MESA_beginDispatchOverride;
+ gl_ctx->exports.endDispatchOverride = __MESA_endDispatchOverride;
+
+ return (__GLinterface *)gl_ctx;
+}
+
+GLboolean __MESA_destroyContext(__GLcontext *gc)
+{
+ XMesaContext xmesa = (XMesaContext) gc->DriverCtx;
+ XMesaDestroyContext( xmesa );
+ return GL_TRUE;
+}
+
+GLboolean __MESA_loseCurrent(__GLcontext *gc)
+{
+ XMesaContext xmesa = (XMesaContext) gc->DriverCtx;
+ MESA_CC = NULL;
+ __glXLastContext = NULL;
+ return XMesaLoseCurrent(xmesa);
+}
+
+GLboolean __MESA_makeCurrent(__GLcontext *gc)
+{
+ __GLdrawablePrivate *drawPriv = gc->imports.getDrawablePrivate( gc );
+ __MESA_buffer drawBuf = (__MESA_buffer)drawPriv->private;
+ __GLdrawablePrivate *readPriv = gc->imports.getReadablePrivate( gc );
+ __MESA_buffer readBuf = (__MESA_buffer)readPriv->private;
+ XMesaContext xmesa = (XMesaContext) gc->DriverCtx;
+
+ MESA_CC = gc;
+ return XMesaMakeCurrent2(xmesa, drawBuf->xm_buf, readBuf->xm_buf);
+}
+
+GLboolean __MESA_shareContext(__GLcontext *gc, __GLcontext *gcShare)
+{
+ /* NOT_DONE */
+ /* XXX I don't see where/how this could ever be called */
+ ErrorF("__MESA_shareContext\n");
+ return GL_FALSE;
+}
+
+GLboolean __MESA_copyContext(__GLcontext *dst, const __GLcontext *src,
+ GLuint mask)
+{
+ XMesaContext xm_dst = (XMesaContext) dst->DriverCtx;
+ const XMesaContext xm_src = (const XMesaContext) src->DriverCtx;
+ _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
+ return GL_TRUE;
+}
+
+GLboolean __MESA_forceCurrent(__GLcontext *gc)
+{
+ XMesaContext xmesa = (XMesaContext) gc->DriverCtx;
+ MESA_CC = gc;
+ return XMesaForceCurrent(xmesa);
+}
+
+GLboolean __MESA_notifyResize(__GLcontext *gc)
+{
+ /* NOT_DONE */
+ ErrorF("__MESA_notifyResize\n");
+ return GL_FALSE;
+}
+
+void __MESA_notifyDestroy(__GLcontext *gc)
+{
+ /* NOT_DONE */
+ ErrorF("__MESA_notifyDestroy\n");
+ return;
+}
+
+void __MESA_notifySwapBuffers(__GLcontext *gc)
+{
+ _mesa_notifySwapBuffers(gc);
+}
+
+struct __GLdispatchStateRec *__MESA_dispatchExec(__GLcontext *gc)
+{
+ /* NOT_DONE */
+ ErrorF("__MESA_dispatchExec\n");
+ return NULL;
+}
+
+void __MESA_beginDispatchOverride(__GLcontext *gc)
+{
+ /* NOT_DONE */
+ ErrorF("__MESA_beginDispatchOverride\n");
+ return;
+}
+
+void __MESA_endDispatchOverride(__GLcontext *gc)
+{
+ /* NOT_DONE */
+ ErrorF("__MESA_endDispatchOverride\n");
+ return;
+}
+
+
+/*
+ * Server-side GLX uses these functions which are normally defined
+ * in the OpenGL SI.
+ */
+
+GLuint __glFloorLog2(GLuint val)
+{
+ int c = 0;
+
+ while (val > 1) {
+ c++;
+ val >>= 1;
+ }
+ return c;
+}
+