/* * 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. * * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile * in support for the MIT Shared Memory extension. If enabled, when you * use an Ximage for the back buffer in double buffered mode, the "swap" * operation will be faster. You must also link with -lXext. * * 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 "glxheader.h" #include "GL/xmesa.h" #include "xmesaP.h" #include "main/context.h" #include "main/framebuffer.h" #include "state_tracker/st_public.h" #include "state_tracker/st_context.h" #include "pipe/p_defines.h" #include "pipe/p_screen.h" #include "pipe/p_winsys.h" #include "pipe/p_context.h" #include "xm_winsys.h" /** * Global X driver lock */ pipe_mutex _xmesa_lock; /**********************************************************************/ /***** X Utility Functions *****/ /**********************************************************************/ /** * Return the host's byte order as LSBFirst or MSBFirst ala X. */ #ifndef XFree86Server static int host_byte_order( void ) { int i = 1; char *cptr = (char *) &i; return (*cptr==1) ? LSBFirst : MSBFirst; } #endif /** * Check if the X Shared Memory extension is available. * Return: 0 = not available * 1 = shared XImage support available * 2 = shared Pixmap support available also */ int xmesa_check_for_xshm( XMesaDisplay *display ) { #if defined(USE_XSHM) && !defined(XFree86Server) int major, minor, ignore; Bool pixmaps; if (getenv("SP_NO_RAST")) return 0; if (getenv("MESA_NOSHM")) { return 0; } if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { return (pixmaps==True) ? 2 : 1; } else { return 0; } } else { return 0; } #else /* No XSHM support */ return 0; #endif } /** * 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 ) { #ifdef XFree86Server const int depth = xmv->nplanes; int i; assert(depth > 0); for (i = 0; i < screenInfo.numPixmapFormats; i++) { if (screenInfo.formats[i].depth == depth) return screenInfo.formats[i].bitsPerPixel; } return depth; /* should never get here, but this should be safe */ #else XMesaDisplay *dpy = xmv->display; XMesaVisualInfo visinfo = xmv->visinfo; XMesaImage *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 */ _mesa_free( img->data ); img->data = NULL; XMesaDestroyImage( img ); return bitsPerPixel; #endif } /* * 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 */ #ifndef XFree86Server static GLboolean WindowExistsFlag; static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) { (void) dpy; if (xerr->error_code == BadWindow) { WindowExistsFlag = GL_FALSE; } return 0; } static GLboolean window_exists( XMesaDisplay *dpy, Window win ) { XWindowAttributes wa; int (*old_handler)( XMesaDisplay*, 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( XMesaDisplay *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; } #endif /** * 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 */ static void xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, GLuint *width, GLuint *height) { #ifdef XFree86Server *width = MIN2(b->drawable->width, MAX_WIDTH); *height = MIN2(b->drawable->height, MAX_HEIGHT); #else Status stat; pipe_mutex_lock(_xmesa_lock); XSync(b->xm_visual->display, 0); /* added for Chromium */ stat = get_drawable_size(dpy, b->drawable, width, height); pipe_mutex_unlock(_xmesa_lock); if (!stat) { /* probably querying a window that's recently been destroyed */ _mesa_warning(NULL, "XGetGeometry failed!\n"); *width = *height = 1; } #endif } /** * 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) { if ( GET_REDMASK(v) == 0x0000ff && GET_GREENMASK(v) == 0x00ff00 && GET_BLUEMASK(v) == 0xff0000 && v->BitsPerPixel == 32) { if (CHECK_BYTE_ORDER(v)) { /* no byteswapping needed */ return 0 /* PIXEL_FORMAT_U_A8_B8_G8_R8 */; } else { return PIPE_FORMAT_R8G8B8A8_UNORM; } } else if ( GET_REDMASK(v) == 0xff0000 && GET_GREENMASK(v) == 0x00ff00 && GET_BLUEMASK(v) == 0x0000ff && v->BitsPerPixel == 32) { if (CHECK_BYTE_ORDER(v)) { /* 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 && CHECK_BYTE_ORDER(v) && v->BitsPerPixel == 16) { /* 5-6-5 RGB */ return PIPE_FORMAT_R5G6B5_UNORM; } assert(0); return 0; } /**********************************************************************/ /***** Linked list of XMesaBuffers *****/ /**********************************************************************/ 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(XMesaDrawable d, BufferType type, XMesaVisual vis, XMesaColormap cmap) { XMesaBuffer b; GLframebuffer *fb; enum pipe_format colorFormat, depthFormat, stencilFormat; uint width, height; ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); if (!b) return NULL; b->drawable = d; b->xm_visual = vis; b->type = type; b->cmap = cmap; /* determine PIPE_FORMATs for buffers */ colorFormat = choose_pixel_format(vis); if (vis->mesa_visual.depthBits == 0) depthFormat = PIPE_FORMAT_NONE; #ifdef GALLIUM_CELL /* XXX temporary for Cell! */ else depthFormat = PIPE_FORMAT_S8Z24_UNORM; #else else if (vis->mesa_visual.depthBits <= 16) depthFormat = PIPE_FORMAT_Z16_UNORM; else if (vis->mesa_visual.depthBits <= 24) depthFormat = PIPE_FORMAT_S8Z24_UNORM; else depthFormat = PIPE_FORMAT_Z32_UNORM; #endif if (vis->mesa_visual.stencilBits == 8) { if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) stencilFormat = depthFormat; else stencilFormat = PIPE_FORMAT_S8_UNORM; } else { /* no stencil */ stencilFormat = PIPE_FORMAT_NONE; if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) { /* use 24-bit Z, undefined stencil channel */ depthFormat = PIPE_FORMAT_X8Z24_UNORM; } } get_drawable_size(vis->display, d, &width, &height); /* * Create framebuffer, but we'll plug in our own renderbuffers below. */ b->stfb = st_create_framebuffer(&vis->mesa_visual, colorFormat, depthFormat, stencilFormat, width, height, (void *) b); fb = &b->stfb->Base; /* * Create scratch XImage for xmesa_display_surface() */ b->tempImage = XCreateImage(vis->display, vis->visinfo->visual, vis->visinfo->depth, ZPixmap, 0, /* format, offset */ NULL, /* data */ 0, 0, /* size */ 32, /* bitmap_pad */ 0); /* bytes_per_line */ /* 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(XMesaDisplay *dpy, XMesaColormap 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) { struct gl_framebuffer *fb = &buffer->stfb->Base; /* unlink buffer from list */ if (prev) prev->Next = buffer->Next; else XMesaBufferList = buffer->Next; /* mark as delete pending */ fb->DeletePending = GL_TRUE; /* Since the X window for the XMesaBuffer is going away, we don't * want to dereference this pointer in the future. */ b->drawable = 0; buffer->tempImage->data = NULL; XDestroyImage(buffer->tempImage); /* Unreference. If count = zero we'll really delete the buffer */ _mesa_unreference_framebuffer(&fb); XFreeGC(b->xm_visual->display, b->gc); 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, XMesaDrawable window, XMesaColormap cmap) { #ifdef XFree86Server int client = (window) ? CLIENT_ID(window->id) : 0; #endif 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")) { _mesa_printf("X/Mesa visual = %p\n", (void *) v); _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); } if (b && window) { /* these should have been set in create_xmesa_buffer */ ASSERT(b->drawable == window); /* Setup for single/double buffering */ if (v->mesa_visual.doubleBufferMode) { /* Double buffered */ b->shm = xmesa_check_for_xshm( v->display ); } /* X11 graphics context */ #ifdef XFree86Server b->gc = CreateScratchGC(v->display, window->depth); #else b->gc = XCreateGC( v->display, window, 0, NULL ); #endif XMesaSetFunction( v->display, b->gc, GXcopy ); } 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( XMesaDisplay *display, XMesaVisualInfo 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 ) { XMesaVisual v; GLint red_bits, green_bits, blue_bits, alpha_bits; #ifndef XFree86Server /* 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 ); } #endif v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); if (!v) { return NULL; } v->display = display; /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() * the struct but we may need some of the information contained in it * at a later time. */ #ifndef XFree86Server v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); if(!v->visinfo) { _mesa_free(v); return NULL; } MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); #endif v->ximage_flag = ximage_flag; #ifdef XFree86Server /* We could calculate these values by ourselves. nplanes is either the sum * of the red, green, and blue bits or the number index bits. * ColormapEntries is either (1U << index_bits) or * (1U << max(redBits, greenBits, blueBits)). */ assert(visinfo->nplanes > 0); v->nplanes = visinfo->nplanes; v->ColormapEntries = visinfo->ColormapEntries; v->mesa_visual.redMask = visinfo->redMask; v->mesa_visual.greenMask = visinfo->greenMask; v->mesa_visual.blueMask = visinfo->blueMask; v->mesa_visual.visualID = visinfo->vid; v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ #else 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; #endif #if defined(XFree86Server) || !(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 = GET_VISUAL_DEPTH(v); 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 == GET_VISUAL_DEPTH(v) ); } alpha_bits = v->mesa_visual.alphaBits; } _mesa_initialize_visual( &v->mesa_visual, rgb_flag, db_flag, stereo_flag, red_bits, green_bits, blue_bits, alpha_bits, v->mesa_visual.indexBits, depth_size, stencil_size, accum_red_size, accum_green_size, accum_blue_size, accum_alpha_size, 0 ); /* XXX minor hack */ v->mesa_visual.level = level; return v; } PUBLIC void XMesaDestroyVisual( XMesaVisual v ) { #ifndef XFree86Server _mesa_free(v->visinfo); #endif _mesa_free(v); } /** * 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 ) { static GLboolean firstTime = GL_TRUE; struct pipe_winsys *winsys; struct pipe_screen *screen; struct pipe_context *pipe; XMesaContext c; GLcontext *mesaCtx; uint pf; if (firstTime) { pipe_mutex_init(_xmesa_lock); firstTime = GL_FALSE; } /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ c = (XMesaContext) CALLOC_STRUCT(xmesa_context); if (!c) return NULL; pf = choose_pixel_format(v); assert(pf); c->xm_visual = v; c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ /* XXX: create once per Xlib Display. */ winsys = xmesa_create_pipe_winsys(); if (winsys == NULL) goto fail; /* XXX: create once per Xlib Display. */ screen = xmesa_create_pipe_screen( winsys ); if (screen == NULL) goto fail; pipe = xmesa_create_pipe_context( screen, (void *)c ); if (pipe == NULL) goto fail; c->st = st_create_context(pipe, &v->mesa_visual, share_list ? share_list->st : NULL); if (c->st == NULL) goto fail; mesaCtx = c->st->ctx; c->st->ctx->DriverCtx = c; #if 00 _mesa_enable_sw_extensions(mesaCtx); _mesa_enable_1_3_extensions(mesaCtx); _mesa_enable_1_4_extensions(mesaCtx); _mesa_enable_1_5_extensions(mesaCtx); _mesa_enable_2_0_extensions(mesaCtx); #endif #ifdef XFree86Server /* If we're running in the X server, do bounds checking to prevent * segfaults and server crashes! */ mesaCtx->Const.CheckArrayBounds = GL_TRUE; #endif return c; fail: if (c->st) st_destroy_context(c->st); else if (pipe) pipe->destroy(pipe); if (screen) screen->destroy( screen ); if (winsys) winsys->destroy( winsys ); FREE(c); return NULL; } PUBLIC void XMesaDestroyContext( XMesaContext c ) { st_destroy_context(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); */ _mesa_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, XMesaWindow w) { #ifndef XFree86Server XWindowAttributes attr; #endif XMesaBuffer b; XMesaColormap cmap; int depth; assert(v); assert(w); /* Check that window depth matches visual depth */ #ifdef XFree86Server depth = ((XMesaDrawable)w)->depth; #else XGetWindowAttributes( v->display, w, &attr ); depth = attr.depth; #endif if (GET_VISUAL_DEPTH(v) != depth) { _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", GET_VISUAL_DEPTH(v), depth); return NULL; } /* Find colormap */ #ifdef XFree86Server cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); #else 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); } #endif b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); if (!b) return NULL; if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, (XMesaDrawable) 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, XMesaPixmap p, XMesaColormap cmap) { XMesaBuffer b; assert(v); b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); if (!b) return NULL; if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, (XMesaDrawable) p, cmap)) { xmesa_free_buffer(b); return NULL; } return b; } /** * For GLX_EXT_texture_from_pixmap */ XMesaBuffer XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap, int format, int target, int mipmap) { GET_CURRENT_CONTEXT(ctx); XMesaBuffer b; GLuint width, height; assert(v); b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); if (!b) return NULL; /* get pixmap size, update framebuffer/renderbuffer dims */ xmesa_get_window_size(v->display, b, &width, &height); _mesa_resize_framebuffer(NULL, &(b->stfb->Base), width, height); if (target == 0) { /* examine dims */ if (ctx->Extensions.ARB_texture_non_power_of_two) { target = GLX_TEXTURE_2D_EXT; } else if ( _mesa_bitcount(width) == 1 && _mesa_bitcount(height) == 1) { /* power of two size */ if (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, (XMesaDrawable) p, cmap)) { xmesa_free_buffer(b); return NULL; } return b; } XMesaBuffer XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, unsigned int width, unsigned int height) { #ifndef XFree86Server XMesaWindow root; XMesaDrawable 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; #else return 0; #endif } /* * Deallocate an XMesaBuffer structure and all related info. */ PUBLIC void XMesaDestroyBuffer(XMesaBuffer b) { xmesa_free_buffer(b); } /** * Query the current window size and update the corresponding GLframebuffer * and all attached renderbuffers. * Called when: * 1. the first time a buffer is bound to a context. * 2. from the XMesaResizeBuffers() API function. * 3. SwapBuffers. XXX probabaly from xm_flush_frontbuffer() too... * Note: it's possible (and legal) for xmctx to be NULL. That can happen * when resizing a buffer when no rendering context is bound. */ void xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) { GLuint width, height; xmesa_get_window_size(drawBuffer->xm_visual->display, drawBuffer, &width, &height); st_resize_framebuffer(drawBuffer->stfb, width, height); } /* * Bind buffer b to context c and make c the current rendering context. */ GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) { return XMesaMakeCurrent2( c, b, b ); } /* * Bind buffer b to context c and make c the current rendering context. */ PUBLIC GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, XMesaBuffer readBuffer ) { if (c) { if (!drawBuffer || !readBuffer) return GL_FALSE; /* must specify buffers! */ #if 0 /* XXX restore this optimization */ if (&(c->mesa) == _mesa_get_current_context() && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer && c->mesa.ReadBuffer == &readBuffer->mesa_buffer && xmesa_buffer(c->mesa.DrawBuffer)->wasCurrent) { /* same context and buffer, do nothing */ return GL_TRUE; } #endif c->xm_buffer = drawBuffer; /* Call this periodically to detect when the user has begun using * GL rendering from multiple threads. */ _glapi_check_multithread(); st_make_current(c->st, drawBuffer->stfb, readBuffer->stfb); xmesa_check_and_update_buffer_size(c, drawBuffer); if (readBuffer != drawBuffer) xmesa_check_and_update_buffer_size(c, readBuffer); /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ drawBuffer->wasCurrent = GL_TRUE; } else { /* Detach */ st_make_current( 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 ) { GET_CURRENT_CONTEXT(ctx); if (ctx) { XMesaContext xmesa = xmesa_context(ctx); return xmesa; } else { return 0; } } XMesaBuffer XMesaGetCurrentBuffer( void ) { GET_CURRENT_CONTEXT(ctx); if (ctx) { XMesaBuffer xmbuf = xmesa_buffer(ctx->DrawBuffer); return xmbuf; } else { return 0; } } /* New in Mesa 3.1 */ XMesaBuffer XMesaGetCurrentReadBuffer( void ) { GET_CURRENT_CONTEXT(ctx); if (ctx) { return xmesa_buffer(ctx->ReadBuffer); } else { return 0; } } #ifdef XFree86Server PUBLIC GLboolean XMesaForceCurrent(XMesaContext c) { if (c) { _glapi_set_dispatch(c->mesa.CurrentDispatch); if (&(c->mesa) != _mesa_get_current_context()) { _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); } } else { _mesa_make_current(NULL, NULL, NULL); } return GL_TRUE; } PUBLIC GLboolean XMesaLoseCurrent(XMesaContext c) { (void) c; _mesa_make_current(NULL, NULL, NULL); return GL_TRUE; } PUBLIC GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) { _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); return GL_TRUE; } #endif /* XFree86Server */ #ifndef FX GLboolean XMesaSetFXmode( GLint mode ) { (void) mode; return GL_FALSE; } #endif /* * Copy the back buffer to the front buffer. If there's no back buffer * this is a no-op. */ PUBLIC void XMesaSwapBuffers( XMesaBuffer b ) { struct pipe_surface *surf; /* If we're swapping the buffer associated with the current context * we have to flush any pending rendering commands first. */ st_notify_swapbuffers(b->stfb); surf = st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT); if (surf) { xmesa_display_surface(b, surf); // xmesa_display_surface(b, surf); } xmesa_check_and_update_buffer_size(NULL, b); } /* * Copy sub-region of back buffer to front buffer */ void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) { struct pipe_surface *surf_front = st_get_framebuffer_surface(b->stfb, ST_SURFACE_FRONT_LEFT); struct pipe_surface *surf_back = st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT); struct pipe_context *pipe = NULL; /* XXX fix */ if (!surf_front || !surf_back) return; pipe->surface_copy(pipe, FALSE, surf_front, x, y, /* dest */ surf_back, x, y, /* src */ width, height); } /* * Return the depth buffer associated with an XMesaBuffer. * Input: b - the XMesa buffer handle * Output: width, height - size of buffer in pixels * bytesPerValue - bytes per depth value (2 or 4) * buffer - pointer to depth buffer values * Return: GL_TRUE or GL_FALSE to indicate success or failure. */ GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, GLint *bytesPerValue, void **buffer ) { *width = 0; *height = 0; *bytesPerValue = 0; *buffer = 0; return GL_FALSE; } void XMesaFlush( XMesaContext c ) { if (c && c->xm_visual->display) { #ifdef XFree86Server /* NOT_NEEDED */ #else st_finish(c->st); XSync( c->xm_visual->display, False ); #endif } } const char *XMesaGetString( XMesaContext c, int name ) { (void) c; if (name==XMESA_VERSION) { return "5.0"; } else if (name==XMESA_EXTENSIONS) { return ""; } else { return NULL; } } XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) { XMesaBuffer b; for (b=XMesaBufferList; b; b=b->Next) { if (b->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(XMesaDisplay *dpy) { XMesaBuffer b, next; for (b = XMesaBufferList; b; b = next) { next = b->Next; if (b->xm_visual->display == dpy) { xmesa_free_buffer(b); } } } /* * 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->drawable && b->type == WINDOW) { #ifdef XFree86Server /* NOT_NEEDED */ #else XSync(b->xm_visual->display, False); if (!window_exists( b->xm_visual->display, b->drawable )) { /* found a dead window, free the ancillary info */ XMesaDestroyBuffer( b ); } #endif } } } unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha ) { /* no longer supported */ return 0; } /* * This is typically called when the window size changes and we need * to reallocate the buffer's back/depth/stencil/accum buffers. */ PUBLIC void XMesaResizeBuffers( XMesaBuffer b ) { GET_CURRENT_CONTEXT(ctx); XMesaContext xmctx = xmesa_context(ctx); if (!xmctx) return; xmesa_check_and_update_buffer_size(xmctx, b); } PUBLIC void XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, const int *attrib_list) { } PUBLIC void XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) { }