/* * Mesa 3-D graphics library * Version: 7.1 * * 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 * BRIAN PAUL 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 "xm_api.h" #include "xm_st.h" #include "pipe/p_defines.h" #include "pipe/p_screen.h" #include "pipe/p_context.h" #include "xm_public.h" #include /* 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); } /* * XXX replace this with a linked list, or better yet, try to attach the * gallium/mesa extra bits to the X Display object with XAddExtension(). */ #define MAX_DISPLAYS 10 static struct xmesa_display Displays[MAX_DISPLAYS]; static int NumDisplays = 0; 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; } } static XMesaDisplay xmesa_init_display( Display *display ) { pipe_static_mutex(init_mutex); XMesaDisplay xmdpy; int i; pipe_mutex_lock(init_mutex); /* Look for XMesaDisplay which corresponds to 'display' */ for (i = 0; i < NumDisplays; i++) { if (Displays[i].display == display) { /* Found it */ pipe_mutex_unlock(init_mutex); return &Displays[i]; } } /* Create new XMesaDisplay */ assert(NumDisplays < MAX_DISPLAYS); xmdpy = &Displays[NumDisplays]; NumDisplays++; if (!xmdpy->display && display) { xmdpy->display = display; xmdpy->screen = driver.create_pipe_screen(display); xmdpy->smapi = CALLOC_STRUCT(st_manager); if (xmdpy->smapi) { xmdpy->smapi->screen = xmdpy->screen; xmdpy->smapi->get_param = xmesa_get_param; } if (xmdpy->screen && xmdpy->smapi) { pipe_mutex_init(xmdpy->mutex); } else { if (xmdpy->screen) { xmdpy->screen->destroy(xmdpy->screen); xmdpy->screen = NULL; } if (xmdpy->smapi) { FREE(xmdpy->smapi); xmdpy->smapi = NULL; } xmdpy->display = NULL; } } if (!xmdpy->display || xmdpy->display != display) xmdpy = NULL; pipe_mutex_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*/ (char*) 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 existance * 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; pipe_mutex_lock(xmdpy->mutex); stat = get_drawable_size(dpy, b->ws.drawable, width, height); pipe_mutex_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_R8G8B8A8_UNORM; } else { return PIPE_FORMAT_A8B8G8R8_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_B8G8R8A8_UNORM; } else { return PIPE_FORMAT_A8R8G8B8_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_A8R8G8B8_UNORM; } else { return PIPE_FORMAT_B8G8R8A8_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) { const enum pipe_texture_target target = PIPE_TEXTURE_2D; const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL; const unsigned geom_flags = (PIPE_TEXTURE_GEOM_NON_SQUARE | PIPE_TEXTURE_GEOM_NON_POWER_OF_TWO); const unsigned sample_count = 0; 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_USCALED_Z24_UNORM; formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED; } 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, tex_usage, geom_flags)) { 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 GLframebuffer. * 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; uint width, height; 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, &width, &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; /* 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 rgb_flag TRUE = RGBA mode, FALSE = color index mode * \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, GLboolean rgb_flag, Drawable window, Colormap cmap) { ASSERT(!b || b->xm_visual == v); /* Save true bits/pixel */ v->BitsPerPixel = bits_per_pixel(v); assert(v->BitsPerPixel > 0); if (rgb_flag == GL_FALSE) { /* COLOR-INDEXED WINDOW: not supported*/ return GL_FALSE; } else { /* RGB WINDOW: * We support RGB rendering into almost any kind of visual. */ const int xclass = v->mesa_visual.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; } v->mesa_visual.indexBits = 0; 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 (_mesa_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; /* For debugging only */ if (_mesa_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 = (XVisualInfo *) 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->mesa_visual.visualID = visinfo->visualid; v->mesa_visual.screen = visinfo->screen; #if !(defined(__cplusplus) || defined(c_plusplus)) v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); #else v->mesa_visual.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, rgb_flag, 0, 0 ); { const int xclass = v->mesa_visual.visualType; if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { red_bits = _mesa_bitcount(GET_REDMASK(v)); green_bits = _mesa_bitcount(GET_GREENMASK(v)); blue_bits = _mesa_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 */ { __GLcontextModes *vis = &v->mesa_visual; vis->rgbMode = GL_TRUE; 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->indexBits = 0; 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->haveAccumBuffer = accum_red_size > 0; vis->haveDepthBuffer = depth_size > 0; vis->haveStencilBuffer = stencil_size > 0; vis->numAuxBuffers = 0; vis->level = 0; vis->pixmapMode = 0; vis->sampleBuffers = 0; vis->samples = 0; } 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); 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); 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); } /** * Do per-display initializations. */ void xmesa_init( Display *display ) { xmesa_init_display(display); } /** * 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 ) { XMesaDisplay xmdpy = xmesa_init_display(v->display); struct st_context_attribs attribs; XMesaContext c; if (!xmdpy) return NULL; /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ c = (XMesaContext) CALLOC_STRUCT(xmesa_context); if (!c) return NULL; c->xm_visual = v; c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ c->xm_read_buffer = NULL; memset(&attribs, 0, sizeof(attribs)); attribs.profile = ST_PROFILE_DEFAULT; attribs.visual = v->stvis; c->st = stapi->create_context(stapi, xmdpy->smapi, &attribs, (share_list) ? share_list->st : NULL); if (c->st == NULL) goto fail; c->st->st_manager_private = (void *) c; return c; fail: if (c->st) c->st->destroy(c->st); free(c); return NULL; } PUBLIC void XMesaDestroyContext( XMesaContext c ) { 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, v->mesa_visual.rgbMode, (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, v->mesa_visual.rgbMode, (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 ( _mesa_bitcount(b->width) == 1 && _mesa_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, v->mesa_visual.rgbMode, (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, v->mesa_visual.rgbMode, 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); } /** * Query the current drawable size and notify the binding context. */ void xmesa_check_buffer_size(XMesaBuffer b) { XMesaContext xmctx = XMesaGetCurrentContext(); if (b->type == PBUFFER) return; xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height); if (xmctx && xmctx->xm_buffer == b) xmctx->st->notify_invalid_framebuffer(xmctx->st, b->stfb); } /* * 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 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->stfb, readBuffer->stfb); /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 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(); if (xmctx && xmctx->xm_buffer == b) { xmctx->st->flush( xmctx->st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_SWAPBUFFERS | PIPE_FLUSH_FRAME, 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 ) { xmesa_copy_st_framebuffer(b->stfb, ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT, x, y, 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, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence); if (fence) { xmdpy->screen->fence_finish(xmdpy->screen, fence, 0); 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 ); } } } } PUBLIC void XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, const int *attrib_list) { } 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); }