--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2007 Brian Paul 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 and this permission notice 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+/**
+ * \file xm_api.c
+ *
+ * All the XMesa* API functions.
+ *
+ *
+ * NOTES:
+ *
+ * The window coordinate system origin (0,0) is in the lower-left corner
+ * of the window. X11's window coordinate origin is in the upper-left
+ * corner of the window. Therefore, most drawing functions in this
+ * file have to flip Y coordinates.
+ *
+ *
+ * Byte swapping: If the Mesa host and the X display use a different
+ * byte order then there's some trickiness to be aware of when using
+ * XImages. The byte ordering used for the XImage is that of the X
+ * display, not the Mesa host.
+ * The color-to-pixel encoding for True/DirectColor must be done
+ * according to the display's visual red_mask, green_mask, and blue_mask.
+ * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
+ * do byte swapping if needed. If one wants to directly "poke" the pixel
+ * into the XImage's buffer then the pixel must be byte swapped first.
+ *
+ */
+
+#ifdef __CYGWIN__
+#undef WIN32
+#undef __WIN32__
+#endif
+
+#include <stdio.h>
+#include "xm_api.h"
+#include "xm_st.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_state.h"
+#include "frontend/api.h"
+
+#include "util/u_atomic.h"
+#include "util/u_inlines.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+
+#include "hud/hud_context.h"
+
+#include "main/errors.h"
+
+#include "xm_public.h"
+#include <GL/glx.h>
+
+
+/* Driver interface routines, set up by xlib backend on library
+ * _init(). These are global in the same way that function names are
+ * global.
+ */
+static struct xm_driver driver;
+static struct st_api *stapi;
+
+/* Default strict invalidate to false. This means we will not call
+ * XGetGeometry after every swapbuffers, which allows swapbuffers to
+ * remain asynchronous. For apps running at 100fps with synchronous
+ * swapping, a 10% boost is typical. For gears, I see closer to 20%
+ * speedup.
+ *
+ * Note that the work of copying data on swapbuffers doesn't disappear
+ * - this change just allows the X server to execute the PutImage
+ * asynchronously without us effectively blocked until its completion.
+ *
+ * This speeds up even llvmpipe's threaded rasterization as the
+ * swapbuffers operation was a large part of the serial component of
+ * an llvmpipe frame.
+ *
+ * The downside of this is correctness - applications which don't call
+ * glViewport on window resizes will get incorrect rendering. A
+ * better solution would be to have per-frame but asynchronous
+ * invalidation. Xcb almost looks as if it could provide this, but
+ * the API doesn't seem to quite be there.
+ */
+boolean xmesa_strict_invalidate = FALSE;
+
+void xmesa_set_driver( const struct xm_driver *templ )
+{
+ driver = *templ;
+ stapi = driver.create_st_api();
+
+ xmesa_strict_invalidate =
+ debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE);
+}
+
+
+static int
+xmesa_get_param(struct st_manager *smapi,
+ enum st_manager_param param)
+{
+ switch(param) {
+ case ST_MANAGER_BROKEN_INVALIDATE:
+ return !xmesa_strict_invalidate;
+ default:
+ return 0;
+ }
+}
+
+/* linked list of XMesaDisplay hooks per display */
+typedef struct _XMesaExtDisplayInfo {
+ struct _XMesaExtDisplayInfo *next;
+ Display *display;
+ struct xmesa_display mesaDisplay;
+} XMesaExtDisplayInfo;
+
+typedef struct _XMesaExtInfo {
+ XMesaExtDisplayInfo *head;
+ int ndisplays;
+} XMesaExtInfo;
+
+static XMesaExtInfo MesaExtInfo;
+
+/* hook to delete XMesaDisplay on XDestroyDisplay */
+extern void
+xmesa_close_display(Display *display)
+{
+ XMesaExtDisplayInfo *info, *prev;
+
+ /* These assertions are not valid since screen creation can fail and result
+ * in an empty list
+ assert(MesaExtInfo.ndisplays > 0);
+ assert(MesaExtInfo.head);
+ */
+
+ _XLockMutex(_Xglobal_lock);
+ /* first find display */
+ prev = NULL;
+ for (info = MesaExtInfo.head; info; info = info->next) {
+ if (info->display == display) {
+ prev = info;
+ break;
+ }
+ }
+
+ if (info == NULL) {
+ /* no display found */
+ _XUnlockMutex(_Xglobal_lock);
+ return;
+ }
+
+ /* remove display entry from list */
+ if (prev != MesaExtInfo.head) {
+ prev->next = info->next;
+ } else {
+ MesaExtInfo.head = info->next;
+ }
+ MesaExtInfo.ndisplays--;
+
+ _XUnlockMutex(_Xglobal_lock);
+
+ /* don't forget to clean up mesaDisplay */
+ XMesaDisplay xmdpy = &info->mesaDisplay;
+
+ /**
+ * XXX: Don't destroy the screens here, since there may still
+ * be some dangling screen pointers that are used after this point
+ * if (xmdpy->screen) {
+ * xmdpy->screen->destroy(xmdpy->screen);
+ * }
+ */
+
+ if (xmdpy->smapi->destroy)
+ xmdpy->smapi->destroy(xmdpy->smapi);
+ free(xmdpy->smapi);
+
+ XFree((char *) info);
+}
+
+static XMesaDisplay
+xmesa_init_display( Display *display )
+{
+ static mtx_t init_mutex = _MTX_INITIALIZER_NP;
+ XMesaDisplay xmdpy;
+ XMesaExtDisplayInfo *info;
+
+ if (display == NULL) {
+ return NULL;
+ }
+
+ mtx_lock(&init_mutex);
+
+ /* Look for XMesaDisplay which corresponds to this display */
+ info = MesaExtInfo.head;
+ while(info) {
+ if (info->display == display) {
+ /* Found it */
+ mtx_unlock(&init_mutex);
+ return &info->mesaDisplay;
+ }
+ info = info->next;
+ }
+
+ /* Not found. Create new XMesaDisplay */
+ /* first allocate X-related resources and hook destroy callback */
+
+ /* allocate mesa display info */
+ info = (XMesaExtDisplayInfo *) Xmalloc(sizeof(XMesaExtDisplayInfo));
+ if (info == NULL) {
+ mtx_unlock(&init_mutex);
+ return NULL;
+ }
+ info->display = display;
+
+ xmdpy = &info->mesaDisplay; /* to be filled out below */
+ xmdpy->display = display;
+ xmdpy->pipe = NULL;
+
+ xmdpy->smapi = CALLOC_STRUCT(st_manager);
+ if (!xmdpy->smapi) {
+ Xfree(info);
+ mtx_unlock(&init_mutex);
+ return NULL;
+ }
+
+ xmdpy->screen = driver.create_pipe_screen(display);
+ if (!xmdpy->screen) {
+ free(xmdpy->smapi);
+ Xfree(info);
+ mtx_unlock(&init_mutex);
+ return NULL;
+ }
+
+ /* At this point, both smapi and screen are known to be valid */
+ xmdpy->smapi->screen = xmdpy->screen;
+ xmdpy->smapi->get_param = xmesa_get_param;
+ (void) mtx_init(&xmdpy->mutex, mtx_plain);
+
+ /* chain to the list of displays */
+ _XLockMutex(_Xglobal_lock);
+ info->next = MesaExtInfo.head;
+ MesaExtInfo.head = info;
+ MesaExtInfo.ndisplays++;
+ _XUnlockMutex(_Xglobal_lock);
+
+ mtx_unlock(&init_mutex);
+
+ return xmdpy;
+}
+
+
+/**********************************************************************/
+/***** X Utility Functions *****/
+/**********************************************************************/
+
+
+/**
+ * Return the host's byte order as LSBFirst or MSBFirst ala X.
+ */
+static int host_byte_order( void )
+{
+ int i = 1;
+ char *cptr = (char *) &i;
+ return (*cptr==1) ? LSBFirst : MSBFirst;
+}
+
+
+
+
+/**
+ * Return the true number of bits per pixel for XImages.
+ * For example, if we request a 24-bit deep visual we may actually need/get
+ * 32bpp XImages. This function returns the appropriate bpp.
+ * Input: dpy - the X display
+ * visinfo - desribes the visual to be used for XImages
+ * Return: true number of bits per pixel for XImages
+ */
+static int
+bits_per_pixel( XMesaVisual xmv )
+{
+ Display *dpy = xmv->display;
+ XVisualInfo * visinfo = xmv->visinfo;
+ XImage *img;
+ int bitsPerPixel;
+ /* Create a temporary XImage */
+ img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
+ ZPixmap, 0, /*format, offset*/
+ malloc(8), /*data*/
+ 1, 1, /*width, height*/
+ 32, /*bitmap_pad*/
+ 0 /*bytes_per_line*/
+ );
+ assert(img);
+ /* grab the bits/pixel value */
+ bitsPerPixel = img->bits_per_pixel;
+ /* free the XImage */
+ free( img->data );
+ img->data = NULL;
+ XDestroyImage( img );
+ return bitsPerPixel;
+}
+
+
+
+/*
+ * Determine if a given X window ID is valid (window exists).
+ * Do this by calling XGetWindowAttributes() for the window and
+ * checking if we catch an X error.
+ * Input: dpy - the display
+ * win - the window to check for existence
+ * Return: GL_TRUE - window exists
+ * GL_FALSE - window doesn't exist
+ */
+static GLboolean WindowExistsFlag;
+
+static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr )
+{
+ (void) dpy;
+ if (xerr->error_code == BadWindow) {
+ WindowExistsFlag = GL_FALSE;
+ }
+ return 0;
+}
+
+static GLboolean window_exists( Display *dpy, Window win )
+{
+ XWindowAttributes wa;
+ int (*old_handler)( Display*, XErrorEvent* );
+ WindowExistsFlag = GL_TRUE;
+ old_handler = XSetErrorHandler(window_exists_err_handler);
+ XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
+ XSetErrorHandler(old_handler);
+ return WindowExistsFlag;
+}
+
+static Status
+get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height )
+{
+ Window root;
+ Status stat;
+ int xpos, ypos;
+ unsigned int w, h, bw, depth;
+ stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
+ *width = w;
+ *height = h;
+ return stat;
+}
+
+
+/**
+ * Return the size of the window (or pixmap) that corresponds to the
+ * given XMesaBuffer.
+ * \param width returns width in pixels
+ * \param height returns height in pixels
+ */
+void
+xmesa_get_window_size(Display *dpy, XMesaBuffer b,
+ GLuint *width, GLuint *height)
+{
+ XMesaDisplay xmdpy = xmesa_init_display(dpy);
+ Status stat;
+
+ mtx_lock(&xmdpy->mutex);
+ stat = get_drawable_size(dpy, b->ws.drawable, width, height);
+ mtx_unlock(&xmdpy->mutex);
+
+ if (!stat) {
+ /* probably querying a window that's recently been destroyed */
+ _mesa_warning(NULL, "XGetGeometry failed!\n");
+ *width = *height = 1;
+ }
+}
+
+#define GET_REDMASK(__v) __v->mesa_visual.redMask
+#define GET_GREENMASK(__v) __v->mesa_visual.greenMask
+#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask
+
+
+/**
+ * Choose the pixel format for the given visual.
+ * This will tell the gallium driver how to pack pixel data into
+ * drawing surfaces.
+ */
+static GLuint
+choose_pixel_format(XMesaVisual v)
+{
+ boolean native_byte_order = (host_byte_order() ==
+ ImageByteOrder(v->display));
+
+ if ( GET_REDMASK(v) == 0x0000ff
+ && GET_GREENMASK(v) == 0x00ff00
+ && GET_BLUEMASK(v) == 0xff0000
+ && v->BitsPerPixel == 32) {
+ if (native_byte_order) {
+ /* no byteswapping needed */
+ return PIPE_FORMAT_RGBA8888_UNORM;
+ }
+ else {
+ return PIPE_FORMAT_ABGR8888_UNORM;
+ }
+ }
+ else if ( GET_REDMASK(v) == 0xff0000
+ && GET_GREENMASK(v) == 0x00ff00
+ && GET_BLUEMASK(v) == 0x0000ff
+ && v->BitsPerPixel == 32) {
+ if (native_byte_order) {
+ /* no byteswapping needed */
+ return PIPE_FORMAT_BGRA8888_UNORM;
+ }
+ else {
+ return PIPE_FORMAT_ARGB8888_UNORM;
+ }
+ }
+ else if ( GET_REDMASK(v) == 0x0000ff00
+ && GET_GREENMASK(v) == 0x00ff0000
+ && GET_BLUEMASK(v) == 0xff000000
+ && v->BitsPerPixel == 32) {
+ if (native_byte_order) {
+ /* no byteswapping needed */
+ return PIPE_FORMAT_ARGB8888_UNORM;
+ }
+ else {
+ return PIPE_FORMAT_BGRA8888_UNORM;
+ }
+ }
+ else if ( GET_REDMASK(v) == 0xf800
+ && GET_GREENMASK(v) == 0x07e0
+ && GET_BLUEMASK(v) == 0x001f
+ && native_byte_order
+ && v->BitsPerPixel == 16) {
+ /* 5-6-5 RGB */
+ return PIPE_FORMAT_B5G6R5_UNORM;
+ }
+
+ return PIPE_FORMAT_NONE;
+}
+
+
+/**
+ * Choose a depth/stencil format that satisfies the given depth and
+ * stencil sizes.
+ */
+static enum pipe_format
+choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil,
+ int sample_count)
+{
+ const enum pipe_texture_target target = PIPE_TEXTURE_2D;
+ const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL;
+ enum pipe_format formats[8], fmt;
+ int count, i;
+
+ count = 0;
+
+ if (depth <= 16 && stencil == 0) {
+ formats[count++] = PIPE_FORMAT_Z16_UNORM;
+ }
+ if (depth <= 24 && stencil == 0) {
+ formats[count++] = PIPE_FORMAT_X8Z24_UNORM;
+ formats[count++] = PIPE_FORMAT_Z24X8_UNORM;
+ }
+ if (depth <= 24 && stencil <= 8) {
+ formats[count++] = PIPE_FORMAT_S8_UINT_Z24_UNORM;
+ formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_UINT;
+ }
+ if (depth <= 32 && stencil == 0) {
+ formats[count++] = PIPE_FORMAT_Z32_UNORM;
+ }
+
+ fmt = PIPE_FORMAT_NONE;
+ for (i = 0; i < count; i++) {
+ if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i],
+ target, sample_count,
+ sample_count, tex_usage)) {
+ fmt = formats[i];
+ break;
+ }
+ }
+
+ return fmt;
+}
+
+
+
+/**********************************************************************/
+/***** Linked list of XMesaBuffers *****/
+/**********************************************************************/
+
+static XMesaBuffer XMesaBufferList = NULL;
+
+
+/**
+ * Allocate a new XMesaBuffer object which corresponds to the given drawable.
+ * Note that XMesaBuffer is derived from struct gl_framebuffer.
+ * The new XMesaBuffer will not have any size (Width=Height=0).
+ *
+ * \param d the corresponding X drawable (window or pixmap)
+ * \param type either WINDOW, PIXMAP or PBUFFER, describing d
+ * \param vis the buffer's visual
+ * \param cmap the window's colormap, if known.
+ * \return new XMesaBuffer or NULL if any problem
+ */
+static XMesaBuffer
+create_xmesa_buffer(Drawable d, BufferType type,
+ XMesaVisual vis, Colormap cmap)
+{
+ XMesaDisplay xmdpy = xmesa_init_display(vis->display);
+ XMesaBuffer b;
+
+ assert(type == WINDOW || type == PIXMAP || type == PBUFFER);
+
+ if (!xmdpy)
+ return NULL;
+
+ b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
+ if (!b)
+ return NULL;
+
+ b->ws.drawable = d;
+ b->ws.visual = vis->visinfo->visual;
+ b->ws.depth = vis->visinfo->depth;
+
+ b->xm_visual = vis;
+ b->type = type;
+ b->cmap = cmap;
+
+ get_drawable_size(vis->display, d, &b->width, &b->height);
+
+ /*
+ * Create framebuffer, but we'll plug in our own renderbuffers below.
+ */
+ b->stfb = xmesa_create_st_framebuffer(xmdpy, b);
+
+ /* GLX_EXT_texture_from_pixmap */
+ b->TextureTarget = 0;
+ b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
+ b->TextureMipmap = 0;
+
+ /* insert buffer into linked list */
+ b->Next = XMesaBufferList;
+ XMesaBufferList = b;
+
+ return b;
+}
+
+
+/**
+ * Find an XMesaBuffer by matching X display and colormap but NOT matching
+ * the notThis buffer.
+ */
+XMesaBuffer
+xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis)
+{
+ XMesaBuffer b;
+ for (b = XMesaBufferList; b; b = b->Next) {
+ if (b->xm_visual->display == dpy &&
+ b->cmap == cmap &&
+ b != notThis) {
+ return b;
+ }
+ }
+ return NULL;
+}
+
+
+/**
+ * Remove buffer from linked list, delete if no longer referenced.
+ */
+static void
+xmesa_free_buffer(XMesaBuffer buffer)
+{
+ XMesaBuffer prev = NULL, b;
+
+ for (b = XMesaBufferList; b; b = b->Next) {
+ if (b == buffer) {
+ /* unlink buffer from list */
+ if (prev)
+ prev->Next = buffer->Next;
+ else
+ XMesaBufferList = buffer->Next;
+
+ /* Since the X window for the XMesaBuffer is going away, we don't
+ * want to dereference this pointer in the future.
+ */
+ b->ws.drawable = 0;
+
+ /* Notify the st manager that the associated framebuffer interface
+ * object is no longer valid.
+ */
+ stapi->destroy_drawable(stapi, buffer->stfb);
+
+ /* XXX we should move the buffer to a delete-pending list and destroy
+ * the buffer until it is no longer current.
+ */
+ xmesa_destroy_st_framebuffer(buffer->stfb);
+
+ free(buffer);
+
+ return;
+ }
+ /* continue search */
+ prev = b;
+ }
+ /* buffer not found in XMesaBufferList */
+ _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
+}
+
+
+
+/**********************************************************************/
+/***** Misc Private Functions *****/
+/**********************************************************************/
+
+
+/**
+ * When a context is bound for the first time, we can finally finish
+ * initializing the context's visual and buffer information.
+ * \param v the XMesaVisual to initialize
+ * \param b the XMesaBuffer to initialize (may be NULL)
+ * \param window the window/pixmap we're rendering into
+ * \param cmap the colormap associated with the window/pixmap
+ * \return GL_TRUE=success, GL_FALSE=failure
+ */
+static GLboolean
+initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
+ Drawable window, Colormap cmap)
+{
+ assert(!b || b->xm_visual == v);
+
+ /* Save true bits/pixel */
+ v->BitsPerPixel = bits_per_pixel(v);
+ assert(v->BitsPerPixel > 0);
+
+ /* RGB WINDOW:
+ * We support RGB rendering into almost any kind of visual.
+ */
+ const int xclass = v->visualType;
+ if (xclass != GLX_TRUE_COLOR && xclass != GLX_DIRECT_COLOR) {
+ _mesa_warning(NULL,
+ "XMesa: RGB mode rendering not supported in given visual.\n");
+ return GL_FALSE;
+ }
+
+ if (v->BitsPerPixel == 32) {
+ /* We use XImages for all front/back buffers. If an X Window or
+ * X Pixmap is 32bpp, there's no guarantee that the alpha channel
+ * will be preserved. For XImages we're in luck.
+ */
+ v->mesa_visual.alphaBits = 8;
+ }
+
+ /*
+ * If MESA_INFO env var is set print out some debugging info
+ * which can help Brian figure out what's going on when a user
+ * reports bugs.
+ */
+ if (getenv("MESA_INFO")) {
+ printf("X/Mesa visual = %p\n", (void *) v);
+ printf("X/Mesa level = %d\n", v->mesa_visual.level);
+ printf("X/Mesa depth = %d\n", v->visinfo->depth);
+ printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
+ }
+
+ return GL_TRUE;
+}
+
+
+
+#define NUM_VISUAL_TYPES 6
+
+/**
+ * Convert an X visual type to a GLX visual type.
+ *
+ * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
+ * to be converted.
+ * \return If \c visualType is a valid X visual type, a GLX visual type will
+ * be returned. Otherwise \c GLX_NONE will be returned.
+ *
+ * \note
+ * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
+ * DRI CVS tree.
+ */
+static GLint
+xmesa_convert_from_x_visual_type( int visualType )
+{
+ static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
+ GLX_STATIC_GRAY, GLX_GRAY_SCALE,
+ GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
+ GLX_TRUE_COLOR, GLX_DIRECT_COLOR
+ };
+
+ return ( (unsigned) visualType < NUM_VISUAL_TYPES )
+ ? glx_visual_types[ visualType ] : GLX_NONE;
+}
+
+
+/**********************************************************************/
+/***** Public Functions *****/
+/**********************************************************************/
+
+
+/*
+ * Create a new X/Mesa visual.
+ * Input: display - X11 display
+ * visinfo - an XVisualInfo pointer
+ * rgb_flag - GL_TRUE = RGB mode,
+ * GL_FALSE = color index mode
+ * alpha_flag - alpha buffer requested?
+ * db_flag - GL_TRUE = double-buffered,
+ * GL_FALSE = single buffered
+ * stereo_flag - stereo visual?
+ * ximage_flag - GL_TRUE = use an XImage for back buffer,
+ * GL_FALSE = use an off-screen pixmap for back buffer
+ * depth_size - requested bits/depth values, or zero
+ * stencil_size - requested bits/stencil values, or zero
+ * accum_red_size - requested bits/red accum values, or zero
+ * accum_green_size - requested bits/green accum values, or zero
+ * accum_blue_size - requested bits/blue accum values, or zero
+ * accum_alpha_size - requested bits/alpha accum values, or zero
+ * num_samples - number of samples/pixel if multisampling, or zero
+ * level - visual level, usually 0
+ * visualCaveat - ala the GLX extension, usually GLX_NONE
+ * Return; a new XMesaVisual or 0 if error.
+ */
+PUBLIC
+XMesaVisual XMesaCreateVisual( Display *display,
+ XVisualInfo * visinfo,
+ GLboolean rgb_flag,
+ GLboolean alpha_flag,
+ GLboolean db_flag,
+ GLboolean stereo_flag,
+ GLboolean ximage_flag,
+ GLint depth_size,
+ GLint stencil_size,
+ GLint accum_red_size,
+ GLint accum_green_size,
+ GLint accum_blue_size,
+ GLint accum_alpha_size,
+ GLint num_samples,
+ GLint level,
+ GLint visualCaveat )
+{
+ XMesaDisplay xmdpy = xmesa_init_display(display);
+ XMesaVisual v;
+ GLint red_bits, green_bits, blue_bits, alpha_bits;
+
+ if (!xmdpy)
+ return NULL;
+
+ if (!rgb_flag)
+ return NULL;
+
+ /* For debugging only */
+ if (getenv("MESA_XSYNC")) {
+ /* This makes debugging X easier.
+ * In your debugger, set a breakpoint on _XError to stop when an
+ * X protocol error is generated.
+ */
+ XSynchronize( display, 1 );
+ }
+
+ v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
+ if (!v) {
+ return NULL;
+ }
+
+ v->display = display;
+
+ /* Save a copy of the XVisualInfo struct because the user may Xfree()
+ * the struct but we may need some of the information contained in it
+ * at a later time.
+ */
+ v->visinfo = malloc(sizeof(*visinfo));
+ if (!v->visinfo) {
+ free(v);
+ return NULL;
+ }
+ memcpy(v->visinfo, visinfo, sizeof(*visinfo));
+
+ v->ximage_flag = ximage_flag;
+
+ v->mesa_visual.redMask = visinfo->red_mask;
+ v->mesa_visual.greenMask = visinfo->green_mask;
+ v->mesa_visual.blueMask = visinfo->blue_mask;
+ v->visualID = visinfo->visualid;
+ v->screen = visinfo->screen;
+
+#if !(defined(__cplusplus) || defined(c_plusplus))
+ v->visualType = xmesa_convert_from_x_visual_type(visinfo->class);
+#else
+ v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
+#endif
+
+ v->mesa_visual.visualRating = visualCaveat;
+
+ if (alpha_flag)
+ v->mesa_visual.alphaBits = 8;
+
+ (void) initialize_visual_and_buffer( v, NULL, 0, 0 );
+
+ {
+ const int xclass = v->visualType;
+ if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
+ red_bits = util_bitcount(GET_REDMASK(v));
+ green_bits = util_bitcount(GET_GREENMASK(v));
+ blue_bits = util_bitcount(GET_BLUEMASK(v));
+ }
+ else {
+ /* this is an approximation */
+ int depth;
+ depth = v->visinfo->depth;
+ red_bits = depth / 3;
+ depth -= red_bits;
+ green_bits = depth / 2;
+ depth -= green_bits;
+ blue_bits = depth;
+ alpha_bits = 0;
+ assert( red_bits + green_bits + blue_bits == v->visinfo->depth );
+ }
+ alpha_bits = v->mesa_visual.alphaBits;
+ }
+
+ /* initialize visual */
+ {
+ struct gl_config *vis = &v->mesa_visual;
+
+ vis->doubleBufferMode = db_flag;
+ vis->stereoMode = stereo_flag;
+
+ vis->redBits = red_bits;
+ vis->greenBits = green_bits;
+ vis->blueBits = blue_bits;
+ vis->alphaBits = alpha_bits;
+ vis->rgbBits = red_bits + green_bits + blue_bits;
+
+ vis->depthBits = depth_size;
+ vis->stencilBits = stencil_size;
+
+ vis->accumRedBits = accum_red_size;
+ vis->accumGreenBits = accum_green_size;
+ vis->accumBlueBits = accum_blue_size;
+ vis->accumAlphaBits = accum_alpha_size;
+
+ vis->numAuxBuffers = 0;
+ vis->level = 0;
+ vis->sampleBuffers = num_samples > 1;
+ vis->samples = num_samples;
+ }
+
+ v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK;
+ if (db_flag)
+ v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
+ if (stereo_flag) {
+ v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
+ if (db_flag)
+ v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
+ }
+
+ v->stvis.color_format = choose_pixel_format(v);
+
+ /* Check format support at requested num_samples (for multisample) */
+ if (!xmdpy->screen->is_format_supported(xmdpy->screen,
+ v->stvis.color_format,
+ PIPE_TEXTURE_2D, num_samples,
+ num_samples,
+ PIPE_BIND_RENDER_TARGET))
+ v->stvis.color_format = PIPE_FORMAT_NONE;
+
+ if (v->stvis.color_format == PIPE_FORMAT_NONE) {
+ free(v->visinfo);
+ free(v);
+ return NULL;
+ }
+
+ v->stvis.depth_stencil_format =
+ choose_depth_stencil_format(xmdpy, depth_size, stencil_size,
+ num_samples);
+
+ v->stvis.accum_format = (accum_red_size +
+ accum_green_size + accum_blue_size + accum_alpha_size) ?
+ PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
+
+ v->stvis.samples = num_samples;
+ v->stvis.render_buffer = ST_ATTACHMENT_INVALID;
+
+ /* XXX minor hack */
+ v->mesa_visual.level = level;
+ return v;
+}
+
+
+PUBLIC
+void XMesaDestroyVisual( XMesaVisual v )
+{
+ free(v->visinfo);
+ free(v);
+}
+
+
+/**
+ * Return the informative name.
+ */
+const char *
+xmesa_get_name(void)
+{
+ return stapi->name;
+}
+
+
+/**
+ * Do per-display initializations.
+ */
+int
+xmesa_init( Display *display )
+{
+ return xmesa_init_display(display) ? 0 : 1;
+}
+
+
+/**
+ * Create a new XMesaContext.
+ * \param v the XMesaVisual
+ * \param share_list another XMesaContext with which to share display
+ * lists or NULL if no sharing is wanted.
+ * \return an XMesaContext or NULL if error.
+ */
+PUBLIC
+XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list,
+ GLuint major, GLuint minor,
+ GLuint profileMask, GLuint contextFlags)
+{
+ XMesaDisplay xmdpy = xmesa_init_display(v->display);
+ struct st_context_attribs attribs;
+ enum st_context_error ctx_err = 0;
+ XMesaContext c;
+
+ if (!xmdpy)
+ goto no_xmesa_context;
+
+ /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
+ c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
+ if (!c)
+ goto no_xmesa_context;
+
+ c->xm_visual = v;
+ c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
+ c->xm_read_buffer = NULL;
+
+ memset(&attribs, 0, sizeof(attribs));
+ attribs.visual = v->stvis;
+ attribs.major = major;
+ attribs.minor = minor;
+ if (contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB)
+ attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
+ if (contextFlags & GLX_CONTEXT_DEBUG_BIT_ARB)
+ attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
+ if (contextFlags & GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB)
+ attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
+
+ switch (profileMask) {
+ case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
+ /* There are no profiles before OpenGL 3.2. The
+ * GLX_ARB_create_context_profile spec says:
+ *
+ * "If the requested OpenGL version is less than 3.2,
+ * GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
+ * of the context is determined solely by the requested version."
+ */
+ if (major > 3 || (major == 3 && minor >= 2)) {
+ attribs.profile = ST_PROFILE_OPENGL_CORE;
+ break;
+ }
+ /* fall-through */
+ case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
+ /*
+ * The spec also says:
+ *
+ * "If version 3.1 is requested, the context returned may implement
+ * any of the following versions:
+ *
+ * * Version 3.1. The GL_ARB_compatibility extension may or may not
+ * be implemented, as determined by the implementation.
+ * * The core profile of version 3.2 or greater."
+ *
+ * and because Mesa doesn't support GL_ARB_compatibility, the only chance to
+ * honour a 3.1 context is through core profile.
+ */
+ if (major == 3 && minor == 1) {
+ attribs.profile = ST_PROFILE_OPENGL_CORE;
+ } else {
+ attribs.profile = ST_PROFILE_DEFAULT;
+ }
+ break;
+ case GLX_CONTEXT_ES_PROFILE_BIT_EXT:
+ if (major >= 2) {
+ attribs.profile = ST_PROFILE_OPENGL_ES2;
+ } else {
+ attribs.profile = ST_PROFILE_OPENGL_ES1;
+ }
+ break;
+ default:
+ assert(0);
+ goto no_st;
+ }
+
+ c->st = stapi->create_context(stapi, xmdpy->smapi, &attribs,
+ &ctx_err, (share_list) ? share_list->st : NULL);
+ if (c->st == NULL)
+ goto no_st;
+
+ c->st->st_manager_private = (void *) c;
+
+ c->hud = hud_create(c->st->cso_context, NULL);
+
+ return c;
+
+no_st:
+ free(c);
+no_xmesa_context:
+ return NULL;
+}
+
+
+
+PUBLIC
+void XMesaDestroyContext( XMesaContext c )
+{
+ if (c->hud) {
+ hud_destroy(c->hud, NULL);
+ }
+
+ c->st->destroy(c->st);
+
+ /* FIXME: We should destroy the screen here, but if we do so, surfaces may
+ * outlive it, causing segfaults
+ struct pipe_screen *screen = c->st->pipe->screen;
+ screen->destroy(screen);
+ */
+
+ free(c);
+}
+
+
+
+/**
+ * Private function for creating an XMesaBuffer which corresponds to an
+ * X window or pixmap.
+ * \param v the window's XMesaVisual
+ * \param w the window we're wrapping
+ * \return new XMesaBuffer or NULL if error
+ */
+PUBLIC XMesaBuffer
+XMesaCreateWindowBuffer(XMesaVisual v, Window w)
+{
+ XWindowAttributes attr;
+ XMesaBuffer b;
+ Colormap cmap;
+ int depth;
+
+ assert(v);
+ assert(w);
+
+ /* Check that window depth matches visual depth */
+ XGetWindowAttributes( v->display, w, &attr );
+ depth = attr.depth;
+ if (v->visinfo->depth != depth) {
+ _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
+ v->visinfo->depth, depth);
+ return NULL;
+ }
+
+ /* Find colormap */
+ if (attr.colormap) {
+ cmap = attr.colormap;
+ }
+ else {
+ _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
+ /* this is weird, a window w/out a colormap!? */
+ /* OK, let's just allocate a new one and hope for the best */
+ cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
+ }
+
+ b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap);
+ if (!b)
+ return NULL;
+
+ if (!initialize_visual_and_buffer( v, b, (Drawable) w, cmap )) {
+ xmesa_free_buffer(b);
+ return NULL;
+ }
+
+ return b;
+}
+
+
+
+/**
+ * Create a new XMesaBuffer from an X pixmap.
+ *
+ * \param v the XMesaVisual
+ * \param p the pixmap
+ * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
+ * \c GLX_DIRECT_COLOR visual for the pixmap
+ * \returns new XMesaBuffer or NULL if error
+ */
+PUBLIC XMesaBuffer
+XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap)
+{
+ XMesaBuffer b;
+
+ assert(v);
+
+ b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
+ if (!b)
+ return NULL;
+
+ if (!initialize_visual_and_buffer(v, b, (Drawable) p, cmap)) {
+ xmesa_free_buffer(b);
+ return NULL;
+ }
+
+ return b;
+}
+
+
+/**
+ * For GLX_EXT_texture_from_pixmap
+ */
+XMesaBuffer
+XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
+ Colormap cmap,
+ int format, int target, int mipmap)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ XMesaBuffer b;
+
+ assert(v);
+
+ b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
+ if (!b)
+ return NULL;
+
+ /* get pixmap size */
+ xmesa_get_window_size(v->display, b, &b->width, &b->height);
+
+ if (target == 0) {
+ /* examine dims */
+ if (ctx->Extensions.ARB_texture_non_power_of_two) {
+ target = GLX_TEXTURE_2D_EXT;
+ }
+ else if ( util_bitcount(b->width) == 1
+ && util_bitcount(b->height) == 1) {
+ /* power of two size */
+ if (b->height == 1) {
+ target = GLX_TEXTURE_1D_EXT;
+ }
+ else {
+ target = GLX_TEXTURE_2D_EXT;
+ }
+ }
+ else if (ctx->Extensions.NV_texture_rectangle) {
+ target = GLX_TEXTURE_RECTANGLE_EXT;
+ }
+ else {
+ /* non power of two textures not supported */
+ XMesaDestroyBuffer(b);
+ return 0;
+ }
+ }
+
+ b->TextureTarget = target;
+ b->TextureFormat = format;
+ b->TextureMipmap = mipmap;
+
+ if (!initialize_visual_and_buffer(v, b, (Drawable) p, cmap)) {
+ xmesa_free_buffer(b);
+ return NULL;
+ }
+
+ return b;
+}
+
+
+
+XMesaBuffer
+XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
+ unsigned int width, unsigned int height)
+{
+ Window root;
+ Drawable drawable; /* X Pixmap Drawable */
+ XMesaBuffer b;
+
+ /* allocate pixmap for front buffer */
+ root = RootWindow( v->display, v->visinfo->screen );
+ drawable = XCreatePixmap(v->display, root, width, height,
+ v->visinfo->depth);
+ if (!drawable)
+ return NULL;
+
+ b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
+ if (!b)
+ return NULL;
+
+ if (!initialize_visual_and_buffer(v, b, drawable, cmap)) {
+ xmesa_free_buffer(b);
+ return NULL;
+ }
+
+ return b;
+}
+
+
+
+/*
+ * Deallocate an XMesaBuffer structure and all related info.
+ */
+PUBLIC void
+XMesaDestroyBuffer(XMesaBuffer b)
+{
+ xmesa_free_buffer(b);
+}
+
+
+/**
+ * Notify the binding context to validate the buffer.
+ */
+void
+xmesa_notify_invalid_buffer(XMesaBuffer b)
+{
+ p_atomic_inc(&b->stfb->stamp);
+}
+
+
+/**
+ * Query the current drawable size and notify the binding context.
+ */
+void
+xmesa_check_buffer_size(XMesaBuffer b)
+{
+ GLuint old_width, old_height;
+
+ if (!b)
+ return;
+
+ if (b->type == PBUFFER)
+ return;
+
+ old_width = b->width;
+ old_height = b->height;
+
+ xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height);
+
+ if (b->width != old_width || b->height != old_height)
+ xmesa_notify_invalid_buffer(b);
+}
+
+
+/*
+ * Bind buffer b to context c and make c the current rendering context.
+ */
+PUBLIC
+GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
+ XMesaBuffer readBuffer )
+{
+ XMesaContext old_ctx = XMesaGetCurrentContext();
+
+ if (old_ctx && old_ctx != c) {
+ XMesaFlush(old_ctx);
+ old_ctx->xm_buffer = NULL;
+ old_ctx->xm_read_buffer = NULL;
+ }
+
+ if (c) {
+ if (!drawBuffer != !readBuffer) {
+ return GL_FALSE; /* must specify zero or two buffers! */
+ }
+
+ if (c == old_ctx &&
+ c->xm_buffer == drawBuffer &&
+ c->xm_read_buffer == readBuffer)
+ return GL_TRUE;
+
+ xmesa_check_buffer_size(drawBuffer);
+ if (readBuffer != drawBuffer)
+ xmesa_check_buffer_size(readBuffer);
+
+ c->xm_buffer = drawBuffer;
+ c->xm_read_buffer = readBuffer;
+
+ stapi->make_current(stapi, c->st,
+ drawBuffer ? drawBuffer->stfb : NULL,
+ readBuffer ? readBuffer->stfb : NULL);
+
+ /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
+ if (drawBuffer)
+ drawBuffer->wasCurrent = GL_TRUE;
+ }
+ else {
+ /* Detach */
+ stapi->make_current(stapi, NULL, NULL, NULL);
+
+ }
+ return GL_TRUE;
+}
+
+
+/*
+ * Unbind the context c from its buffer.
+ */
+GLboolean XMesaUnbindContext( XMesaContext c )
+{
+ /* A no-op for XFree86 integration purposes */
+ return GL_TRUE;
+}
+
+
+XMesaContext XMesaGetCurrentContext( void )
+{
+ struct st_context_iface *st = stapi->get_current(stapi);
+ return (XMesaContext) (st) ? st->st_manager_private : NULL;
+}
+
+
+
+/**
+ * Swap front and back color buffers and have winsys display front buffer.
+ * If there's no front color buffer no swap actually occurs.
+ */
+PUBLIC
+void XMesaSwapBuffers( XMesaBuffer b )
+{
+ XMesaContext xmctx = XMesaGetCurrentContext();
+
+ /* Need to draw HUD before flushing */
+ if (xmctx && xmctx->hud) {
+ struct pipe_resource *back =
+ xmesa_get_framebuffer_resource(b->stfb, ST_ATTACHMENT_BACK_LEFT);
+ hud_run(xmctx->hud, NULL, back);
+ }
+
+ if (xmctx && xmctx->xm_buffer == b) {
+ xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL, NULL, NULL);
+ }
+
+ xmesa_swap_st_framebuffer(b->stfb);
+}
+
+
+
+/*
+ * Copy sub-region of back buffer to front buffer
+ */
+void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
+{
+ XMesaContext xmctx = XMesaGetCurrentContext();
+
+ xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL, NULL, NULL);
+
+ xmesa_copy_st_framebuffer(b->stfb,
+ ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT,
+ x, b->height - y - height, width, height);
+}
+
+
+
+void XMesaFlush( XMesaContext c )
+{
+ if (c && c->xm_visual->display) {
+ XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display);
+ struct pipe_fence_handle *fence = NULL;
+
+ c->st->flush(c->st, ST_FLUSH_FRONT, &fence, NULL, NULL);
+ if (fence) {
+ xmdpy->screen->fence_finish(xmdpy->screen, NULL, fence,
+ PIPE_TIMEOUT_INFINITE);
+ xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL);
+ }
+ XFlush( c->xm_visual->display );
+ }
+}
+
+
+
+
+
+XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d )
+{
+ XMesaBuffer b;
+ for (b = XMesaBufferList; b; b = b->Next) {
+ if (b->ws.drawable == d && b->xm_visual->display == dpy) {
+ return b;
+ }
+ }
+ return NULL;
+}
+
+
+/**
+ * Free/destroy all XMesaBuffers associated with given display.
+ */
+void xmesa_destroy_buffers_on_display(Display *dpy)
+{
+ XMesaBuffer b, next;
+ for (b = XMesaBufferList; b; b = next) {
+ next = b->Next;
+ if (b->xm_visual->display == dpy) {
+ xmesa_free_buffer(b);
+ /* delete head of list? */
+ if (XMesaBufferList == b) {
+ XMesaBufferList = next;
+ }
+ }
+ }
+}
+
+
+/*
+ * Look for XMesaBuffers whose X window has been destroyed.
+ * Deallocate any such XMesaBuffers.
+ */
+void XMesaGarbageCollect( void )
+{
+ XMesaBuffer b, next;
+ for (b=XMesaBufferList; b; b=next) {
+ next = b->Next;
+ if (b->xm_visual &&
+ b->xm_visual->display &&
+ b->ws.drawable &&
+ b->type == WINDOW) {
+ XSync(b->xm_visual->display, False);
+ if (!window_exists( b->xm_visual->display, b->ws.drawable )) {
+ /* found a dead window, free the ancillary info */
+ XMesaDestroyBuffer( b );
+ }
+ }
+ }
+}
+
+
+static enum st_attachment_type xmesa_attachment_type(int glx_attachment)
+{
+ switch(glx_attachment) {
+ case GLX_FRONT_LEFT_EXT:
+ return ST_ATTACHMENT_FRONT_LEFT;
+ case GLX_FRONT_RIGHT_EXT:
+ return ST_ATTACHMENT_FRONT_RIGHT;
+ case GLX_BACK_LEFT_EXT:
+ return ST_ATTACHMENT_BACK_LEFT;
+ case GLX_BACK_RIGHT_EXT:
+ return ST_ATTACHMENT_BACK_RIGHT;
+ default:
+ assert(0);
+ return ST_ATTACHMENT_FRONT_LEFT;
+ }
+}
+
+
+PUBLIC void
+XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
+ const int *attrib_list)
+{
+ struct st_context_iface *st = stapi->get_current(stapi);
+ struct st_framebuffer_iface* stfbi = drawable->stfb;
+ struct pipe_resource *res;
+ int x, y, w, h;
+ enum st_attachment_type st_attachment = xmesa_attachment_type(buffer);
+
+ x = 0;
+ y = 0;
+ w = drawable->width;
+ h = drawable->height;
+
+ /* We need to validate our attachments before using them,
+ * in case the texture doesn't exist yet. */
+ xmesa_st_framebuffer_validate_textures(stfbi, w, h, 1 << st_attachment);
+ res = xmesa_get_attachment(stfbi, st_attachment);
+
+ if (res) {
+ struct pipe_context* pipe = xmesa_get_context(stfbi);
+ enum pipe_format internal_format = res->format;
+ struct pipe_transfer *tex_xfer;
+ char *map;
+ int line, byte_width;
+ XImage *img;
+
+ internal_format = choose_pixel_format(drawable->xm_visual);
+
+ map = pipe_transfer_map(pipe, res,
+ 0, 0, /* level, layer */
+ PIPE_TRANSFER_WRITE,
+ x, y,
+ w, h, &tex_xfer);
+ if (!map)
+ return;
+
+ /* Grab the XImage that we want to turn into a texture. */
+ img = XGetImage(dpy,
+ drawable->ws.drawable,
+ x, y,
+ w, h,
+ AllPlanes,
+ ZPixmap);
+
+ if (!img) {
+ pipe_transfer_unmap(pipe, tex_xfer);
+ return;
+ }
+
+ /* The pipe transfer has a pitch rounded up to the nearest 64 pixels. */
+ byte_width = w * ((img->bits_per_pixel + 7) / 8);
+
+ for (line = 0; line < h; line++)
+ memcpy(&map[line * tex_xfer->stride],
+ &img->data[line * img->bytes_per_line],
+ byte_width);
+
+ pipe_transfer_unmap(pipe, tex_xfer);
+
+ st->teximage(st,
+ ST_TEXTURE_2D,
+ 0, /* level */
+ internal_format,
+ res,
+ FALSE /* no mipmap */);
+
+ }
+}
+
+
+
+PUBLIC void
+XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer)
+{
+}
+
+
+void
+XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask)
+{
+ if (dst->st->copy)
+ dst->st->copy(dst->st, src->st, mask);
+}