| /* |
| * 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. In |
| * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format |
| * and use XPutPixel everywhere except in the implementation of |
| * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so |
| * instead of using XPutPixel we "poke" our values after byte-swapping |
| * the clear pixel value if needed. |
| * |
| */ |
| |
| #ifdef __CYGWIN__ |
| #undef WIN32 |
| #undef __WIN32__ |
| #endif |
| |
| #include "glxheader.h" |
| #include "xmesaP.h" |
| #include "main/context.h" |
| #include "main/extensions.h" |
| #include "main/framebuffer.h" |
| #include "main/imports.h" |
| #include "main/macros.h" |
| #include "main/renderbuffer.h" |
| #include "main/teximage.h" |
| #include "glapi/glthread.h" |
| #include "swrast/swrast.h" |
| #include "swrast/s_renderbuffer.h" |
| #include "swrast_setup/swrast_setup.h" |
| #include "vbo/vbo.h" |
| #include "tnl/tnl.h" |
| #include "tnl/t_context.h" |
| #include "tnl/t_pipeline.h" |
| #include "drivers/common/driverfuncs.h" |
| #include "drivers/common/meta.h" |
| |
| /** |
| * Global X driver lock |
| */ |
| _glthread_Mutex _xmesa_lock; |
| |
| |
| |
| /**********************************************************************/ |
| /***** 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; |
| } |
| |
| |
| /** |
| * Check if the X Shared Memory extension is available. |
| * Return: 0 = not available |
| * 1 = shared XImage support available |
| * 2 = shared Pixmap support available also |
| */ |
| static int check_for_xshm( XMesaDisplay *display ) |
| { |
| #if defined(USE_XSHM) |
| int ignore; |
| |
| if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { |
| /* Note: we're no longer calling XShmQueryVersion() here. It seems |
| * to be flakey (triggers a spurious X protocol error when we close |
| * one display connection and start using a new one. XShm has been |
| * around a long time and hasn't changed so if MIT_SHM is supported |
| * we assume we're good to go. |
| */ |
| return 2; |
| } |
| else { |
| return 0; |
| } |
| #else |
| /* No XSHM support */ |
| return 0; |
| #endif |
| } |
| |
| |
| /** |
| * Apply gamma correction to an intensity value in [0..max]. Return the |
| * new intensity value. |
| */ |
| static GLint |
| gamma_adjust( GLfloat gamma, GLint value, GLint max ) |
| { |
| if (gamma == 1.0) { |
| return value; |
| } |
| else { |
| double x = (double) value / (double) max; |
| return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma)); |
| } |
| } |
| |
| |
| |
| /** |
| * 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 ) |
| { |
| 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 */ |
| free( img->data ); |
| img->data = NULL; |
| XMesaDestroyImage( 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( 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, GLuint *width, GLuint *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(XMesaDisplay *dpy, XMesaBuffer b, |
| GLuint *width, GLuint *height) |
| { |
| Status stat; |
| |
| _glthread_LOCK_MUTEX(_xmesa_lock); |
| XSync(b->xm_visual->display, 0); /* added for Chromium */ |
| stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); |
| _glthread_UNLOCK_MUTEX(_xmesa_lock); |
| |
| if (!stat) { |
| /* probably querying a window that's recently been destroyed */ |
| _mesa_warning(NULL, "XGetGeometry failed!\n"); |
| *width = *height = 1; |
| } |
| } |
| |
| |
| |
| /**********************************************************************/ |
| /***** Linked list of XMesaBuffers *****/ |
| /**********************************************************************/ |
| |
| 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(XMesaDrawable d, BufferType type, |
| XMesaVisual vis, XMesaColormap cmap) |
| { |
| XMesaBuffer b; |
| |
| ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); |
| |
| b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); |
| if (!b) |
| return NULL; |
| |
| b->display = vis->display; |
| b->xm_visual = vis; |
| b->type = type; |
| b->cmap = cmap; |
| |
| _mesa_initialize_window_framebuffer(&b->mesa_buffer, &vis->mesa_visual); |
| b->mesa_buffer.Delete = xmesa_delete_framebuffer; |
| |
| /* |
| * Front renderbuffer |
| */ |
| b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_FALSE); |
| if (!b->frontxrb) { |
| free(b); |
| return NULL; |
| } |
| b->frontxrb->Parent = b; |
| b->frontxrb->drawable = d; |
| b->frontxrb->pixmap = (XMesaPixmap) d; |
| _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, |
| &b->frontxrb->Base.Base); |
| |
| /* |
| * Back renderbuffer |
| */ |
| if (vis->mesa_visual.doubleBufferMode) { |
| b->backxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_TRUE); |
| if (!b->backxrb) { |
| /* XXX free front xrb too */ |
| free(b); |
| return NULL; |
| } |
| b->backxrb->Parent = b; |
| /* determine back buffer implementation */ |
| b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; |
| |
| _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, |
| &b->backxrb->Base.Base); |
| } |
| |
| /* |
| * Other renderbuffer (depth, stencil, etc) |
| */ |
| _swrast_add_soft_renderbuffers(&b->mesa_buffer, |
| GL_FALSE, /* color */ |
| vis->mesa_visual.haveDepthBuffer, |
| vis->mesa_visual.haveStencilBuffer, |
| vis->mesa_visual.haveAccumBuffer, |
| GL_FALSE, /* software alpha buffer */ |
| vis->mesa_visual.numAuxBuffers > 0 ); |
| |
| /* 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->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->mesa_buffer; |
| |
| /* 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->frontxrb->drawable = 0; |
| |
| /* Unreference. If count = zero we'll really delete the buffer */ |
| _mesa_reference_framebuffer(&fb, NULL); |
| |
| return; |
| } |
| /* continue search */ |
| prev = b; |
| } |
| /* buffer not found in XMesaBufferList */ |
| _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); |
| } |
| |
| |
| |
| |
| /**********************************************************************/ |
| /***** Misc Private Functions *****/ |
| /**********************************************************************/ |
| |
| |
| /** |
| * Setup RGB rendering for a window with a True/DirectColor visual. |
| */ |
| static void |
| setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) |
| { |
| unsigned long rmask, gmask, bmask; |
| (void) buffer; |
| (void) cmap; |
| |
| /* Compute red multiplier (mask) and bit shift */ |
| v->rshift = 0; |
| rmask = GET_REDMASK(v); |
| while ((rmask & 1)==0) { |
| v->rshift++; |
| rmask = rmask >> 1; |
| } |
| |
| /* Compute green multiplier (mask) and bit shift */ |
| v->gshift = 0; |
| gmask = GET_GREENMASK(v); |
| while ((gmask & 1)==0) { |
| v->gshift++; |
| gmask = gmask >> 1; |
| } |
| |
| /* Compute blue multiplier (mask) and bit shift */ |
| v->bshift = 0; |
| bmask = GET_BLUEMASK(v); |
| while ((bmask & 1)==0) { |
| v->bshift++; |
| bmask = bmask >> 1; |
| } |
| |
| /* |
| * Compute component-to-pixel lookup tables and dithering kernel |
| */ |
| { |
| static GLubyte kernel[16] = { |
| 0*16, 8*16, 2*16, 10*16, |
| 12*16, 4*16, 14*16, 6*16, |
| 3*16, 11*16, 1*16, 9*16, |
| 15*16, 7*16, 13*16, 5*16, |
| }; |
| GLint rBits = _mesa_bitcount(rmask); |
| GLint gBits = _mesa_bitcount(gmask); |
| GLint bBits = _mesa_bitcount(bmask); |
| GLint maxBits; |
| GLuint i; |
| |
| /* convert pixel components in [0,_mask] to RGB values in [0,255] */ |
| for (i=0; i<=rmask; i++) |
| v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); |
| for (i=0; i<=gmask; i++) |
| v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); |
| for (i=0; i<=bmask; i++) |
| v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); |
| |
| /* convert RGB values from [0,255] to pixel components */ |
| |
| for (i=0;i<256;i++) { |
| GLint r = gamma_adjust(v->RedGamma, i, 255); |
| GLint g = gamma_adjust(v->GreenGamma, i, 255); |
| GLint b = gamma_adjust(v->BlueGamma, i, 255); |
| v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; |
| v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; |
| v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; |
| } |
| /* overflow protection */ |
| for (i=256;i<512;i++) { |
| v->RtoPixel[i] = v->RtoPixel[255]; |
| v->GtoPixel[i] = v->GtoPixel[255]; |
| v->BtoPixel[i] = v->BtoPixel[255]; |
| } |
| |
| /* setup dithering kernel */ |
| maxBits = rBits; |
| if (gBits > maxBits) maxBits = gBits; |
| if (bBits > maxBits) maxBits = bBits; |
| for (i=0;i<16;i++) { |
| v->Kernel[i] = kernel[i] >> maxBits; |
| } |
| |
| v->undithered_pf = PF_Truecolor; |
| v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; |
| } |
| |
| /* |
| * Now check for TrueColor visuals which we can optimize. |
| */ |
| if ( GET_REDMASK(v) ==0x0000ff |
| && GET_GREENMASK(v)==0x00ff00 |
| && GET_BLUEMASK(v) ==0xff0000 |
| && CHECK_BYTE_ORDER(v) |
| && v->BitsPerPixel==32 |
| && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { |
| /* common 32 bpp config used on SGI, Sun */ |
| v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ |
| } |
| else if (GET_REDMASK(v) == 0xff0000 |
| && GET_GREENMASK(v)== 0x00ff00 |
| && GET_BLUEMASK(v) == 0x0000ff |
| && CHECK_BYTE_ORDER(v) |
| && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ |
| if (v->BitsPerPixel==32) { |
| /* if 32 bpp, and visual indicates 8 bpp alpha channel */ |
| if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) |
| v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ |
| else |
| v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ |
| } |
| else if (v->BitsPerPixel == 24) { |
| v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ |
| } |
| } |
| else if (GET_REDMASK(v) ==0xf800 |
| && GET_GREENMASK(v)==0x07e0 |
| && GET_BLUEMASK(v) ==0x001f |
| && CHECK_BYTE_ORDER(v) |
| && v->BitsPerPixel==16 |
| && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { |
| /* 5-6-5 RGB */ |
| v->undithered_pf = PF_5R6G5B; |
| v->dithered_pf = PF_Dither_5R6G5B; |
| } |
| } |
| |
| |
| /** |
| * 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, |
| XMesaDrawable window, |
| XMesaColormap cmap) |
| { |
| const int xclass = v->visualType; |
| |
| |
| 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. |
| */ |
| if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { |
| setup_truecolor( v, b, cmap ); |
| } |
| else { |
| _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); |
| return GL_FALSE; |
| } |
| v->mesa_visual.indexBits = 0; |
| |
| if (_mesa_getenv("MESA_NO_DITHER")) { |
| v->dithered_pf = v->undithered_pf; |
| } |
| |
| |
| /* |
| * 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 dithered pf = %u\n", v->dithered_pf); |
| printf("X/Mesa undithered pf = %u\n", v->undithered_pf); |
| printf("X/Mesa level = %d\n", v->mesa_visual.level); |
| printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); |
| printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); |
| } |
| |
| if (b && window) { |
| /* Do window-specific initializations */ |
| |
| /* these should have been set in create_xmesa_buffer */ |
| ASSERT(b->frontxrb->drawable == window); |
| ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); |
| |
| /* Setup for single/double buffering */ |
| if (v->mesa_visual.doubleBufferMode) { |
| /* Double buffered */ |
| b->shm = check_for_xshm( v->display ); |
| } |
| |
| /* X11 graphics contexts */ |
| b->gc = XCreateGC( v->display, window, 0, NULL ); |
| XMesaSetFunction( v->display, b->gc, GXcopy ); |
| |
| /* cleargc - for glClear() */ |
| b->cleargc = XCreateGC( v->display, window, 0, NULL ); |
| XMesaSetFunction( v->display, b->cleargc, GXcopy ); |
| |
| /* |
| * Don't generate Graphics Expose/NoExpose events in swapbuffers(). |
| * Patch contributed by Michael Pichler May 15, 1995. |
| */ |
| { |
| XGCValues gcvalues; |
| gcvalues.graphics_exposures = False; |
| b->swapgc = XCreateGC(v->display, window, |
| GCGraphicsExposures, &gcvalues); |
| } |
| XMesaSetFunction( v->display, b->swapgc, GXcopy ); |
| } |
| |
| return GL_TRUE; |
| } |
| |
| |
| |
| /* |
| * Convert an RGBA color to a pixel value. |
| */ |
| unsigned long |
| xmesa_color_to_pixel(struct gl_context *ctx, |
| GLubyte r, GLubyte g, GLubyte b, GLubyte a, |
| GLuint pixelFormat) |
| { |
| XMesaContext xmesa = XMESA_CONTEXT(ctx); |
| switch (pixelFormat) { |
| case PF_Truecolor: |
| { |
| unsigned long p; |
| PACK_TRUECOLOR( p, r, g, b ); |
| return p; |
| } |
| case PF_8A8B8G8R: |
| return PACK_8A8B8G8R( r, g, b, a ); |
| case PF_8A8R8G8B: |
| return PACK_8A8R8G8B( r, g, b, a ); |
| case PF_8R8G8B: |
| /* fall through */ |
| case PF_8R8G8B24: |
| return PACK_8R8G8B( r, g, b ); |
| case PF_5R6G5B: |
| return PACK_5R6G5B( r, g, b ); |
| case PF_Dither_True: |
| /* fall through */ |
| case PF_Dither_5R6G5B: |
| { |
| unsigned long p; |
| PACK_TRUEDITHER(p, 1, 0, r, g, b); |
| return p; |
| } |
| default: |
| _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); |
| } |
| return 0; |
| } |
| |
| |
| #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 ) |
| { |
| char *gamma; |
| XMesaVisual v; |
| GLint red_bits, green_bits, blue_bits, alpha_bits; |
| |
| /* 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 ); |
| } |
| |
| /* Color-index rendering not supported. */ |
| if (!rgb_flag) |
| return NULL; |
| |
| 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)); |
| |
| /* check for MESA_GAMMA environment variable */ |
| gamma = _mesa_getenv("MESA_GAMMA"); |
| if (gamma) { |
| v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; |
| sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); |
| if (v->RedGamma<=0.0) v->RedGamma = 1.0; |
| if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; |
| if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; |
| } |
| else { |
| v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; |
| } |
| |
| 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 = _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; |
| } |
| |
| if (!_mesa_initialize_visual(&v->mesa_visual, |
| db_flag, stereo_flag, |
| red_bits, green_bits, |
| blue_bits, alpha_bits, |
| depth_size, |
| stencil_size, |
| accum_red_size, accum_green_size, |
| accum_blue_size, accum_alpha_size, |
| 0)) { |
| FREE(v); |
| return NULL; |
| } |
| |
| /* XXX minor hack */ |
| v->mesa_visual.level = level; |
| return v; |
| } |
| |
| |
| PUBLIC |
| void XMesaDestroyVisual( XMesaVisual v ) |
| { |
| free(v->visinfo); |
| 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; |
| XMesaContext c; |
| struct gl_context *mesaCtx; |
| struct dd_function_table functions; |
| TNLcontext *tnl; |
| |
| if (firstTime) { |
| _glthread_INIT_MUTEX(_xmesa_lock); |
| firstTime = GL_FALSE; |
| } |
| |
| /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */ |
| c = (XMesaContext) CALLOC_STRUCT(xmesa_context); |
| if (!c) |
| return NULL; |
| |
| mesaCtx = &(c->mesa); |
| |
| /* initialize with default driver functions, then plug in XMesa funcs */ |
| _mesa_init_driver_functions(&functions); |
| xmesa_init_driver_functions(v, &functions); |
| if (!_mesa_initialize_context(mesaCtx, API_OPENGL, &v->mesa_visual, |
| share_list ? &(share_list->mesa) : (struct gl_context *) NULL, |
| &functions, (void *) c)) { |
| free(c); |
| return NULL; |
| } |
| |
| /* Enable this to exercise fixed function -> shader translation |
| * with software rendering. |
| */ |
| if (0) { |
| mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE; |
| mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE; |
| } |
| |
| _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); |
| _mesa_enable_2_1_extensions(mesaCtx); |
| if (mesaCtx->Mesa_DXTn) { |
| _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); |
| _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); |
| } |
| _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); |
| #if ENABLE_EXT_timer_query |
| _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); |
| #endif |
| |
| |
| /* finish up xmesa context initializations */ |
| c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; |
| c->xm_visual = v; |
| c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ |
| c->display = v->display; |
| c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ |
| |
| /* Initialize the software rasterizer and helper modules. |
| */ |
| if (!_swrast_CreateContext( mesaCtx ) || |
| !_vbo_CreateContext( mesaCtx ) || |
| !_tnl_CreateContext( mesaCtx ) || |
| !_swsetup_CreateContext( mesaCtx )) { |
| _mesa_free_context_data(&c->mesa); |
| free(c); |
| return NULL; |
| } |
| |
| /* tnl setup */ |
| tnl = TNL_CONTEXT(mesaCtx); |
| tnl->Driver.RunPipeline = _tnl_run_pipeline; |
| /* swrast setup */ |
| xmesa_register_swrast_functions( mesaCtx ); |
| _swsetup_Wakeup(mesaCtx); |
| |
| _mesa_meta_init(mesaCtx); |
| |
| return c; |
| } |
| |
| |
| |
| PUBLIC |
| void XMesaDestroyContext( XMesaContext c ) |
| { |
| struct gl_context *mesaCtx = &c->mesa; |
| |
| _mesa_meta_free( mesaCtx ); |
| |
| _swsetup_DestroyContext( mesaCtx ); |
| _swrast_DestroyContext( mesaCtx ); |
| _tnl_DestroyContext( mesaCtx ); |
| _vbo_DestroyContext( mesaCtx ); |
| _mesa_free_context_data( mesaCtx ); |
| 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) |
| { |
| XWindowAttributes attr; |
| XMesaBuffer b; |
| XMesaColormap cmap; |
| int depth; |
| |
| assert(v); |
| assert(w); |
| |
| /* Check that window depth matches visual depth */ |
| XGetWindowAttributes( v->display, w, &attr ); |
| depth = attr.depth; |
| 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 */ |
| 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((XMesaDrawable) w, WINDOW, v, cmap); |
| if (!b) |
| return NULL; |
| |
| if (!initialize_visual_and_buffer( v, b, (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, (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->mesa_buffer), 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, (XMesaDrawable) p, cmap)) { |
| xmesa_free_buffer(b); |
| return NULL; |
| } |
| |
| return b; |
| } |
| |
| |
| |
| XMesaBuffer |
| XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, |
| unsigned int width, unsigned int height) |
| { |
| 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, 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 window size and update the corresponding struct gl_framebuffer |
| * and all attached renderbuffers. |
| * Called when: |
| * 1. the first time a buffer is bound to a context. |
| * 2. from glViewport to poll for window size changes |
| * 3. from the XMesaResizeBuffers() API function. |
| * 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->display, drawBuffer, &width, &height); |
| if (drawBuffer->mesa_buffer.Width != width || |
| drawBuffer->mesa_buffer.Height != height) { |
| struct gl_context *ctx = xmctx ? &xmctx->mesa : NULL; |
| _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); |
| } |
| drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ |
| } |
| |
| |
| /* |
| * 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 (&(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; |
| } |
| |
| c->xm_buffer = drawBuffer; |
| |
| /* Call this periodically to detect when the user has begun using |
| * GL rendering from multiple threads. |
| */ |
| _glapi_check_multithread(); |
| |
| xmesa_check_and_update_buffer_size(c, drawBuffer); |
| if (readBuffer != drawBuffer) |
| xmesa_check_and_update_buffer_size(c, readBuffer); |
| |
| _mesa_make_current(&(c->mesa), |
| &drawBuffer->mesa_buffer, |
| &readBuffer->mesa_buffer); |
| |
| /* |
| * Must recompute and set these pixel values because colormap |
| * can be different for different windows. |
| */ |
| c->clearpixel = xmesa_color_to_pixel( &c->mesa, |
| c->clearcolor[0], |
| c->clearcolor[1], |
| c->clearcolor[2], |
| c->clearcolor[3], |
| c->xm_visual->undithered_pf); |
| XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); |
| |
| /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ |
| drawBuffer->wasCurrent = GL_TRUE; |
| } |
| else { |
| /* Detach */ |
| _mesa_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; |
| } |
| } |
| |
| |
| |
| GLboolean XMesaSetFXmode( GLint mode ) |
| { |
| (void) mode; |
| return GL_FALSE; |
| } |
| |
| |
| |
| /* |
| * Copy the back buffer to the front buffer. If there's no back buffer |
| * this is a no-op. |
| */ |
| PUBLIC |
| void XMesaSwapBuffers( XMesaBuffer b ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| if (!b->backxrb) { |
| /* single buffered */ |
| return; |
| } |
| |
| /* If we're swapping the buffer associated with the current context |
| * we have to flush any pending rendering commands first. |
| */ |
| if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) |
| _mesa_notifySwapBuffers(ctx); |
| |
| if (b->db_mode) { |
| if (b->backxrb->ximage) { |
| /* Copy Ximage (back buf) from client memory to server window */ |
| #if defined(USE_XSHM) |
| if (b->shm) { |
| /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ |
| XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, |
| b->swapgc, |
| b->backxrb->ximage, 0, 0, |
| 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, |
| False ); |
| /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ |
| } |
| else |
| #endif |
| { |
| /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ |
| XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, |
| b->swapgc, |
| b->backxrb->ximage, 0, 0, |
| 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); |
| /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ |
| } |
| } |
| else if (b->backxrb->pixmap) { |
| /* Copy pixmap (back buf) to window (front buf) on server */ |
| /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ |
| XMesaCopyArea( b->xm_visual->display, |
| b->backxrb->pixmap, /* source drawable */ |
| b->frontxrb->drawable, /* dest. drawable */ |
| b->swapgc, |
| 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, |
| 0, 0 /* dest region */ |
| ); |
| /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ |
| } |
| } |
| XSync( b->xm_visual->display, False ); |
| } |
| |
| |
| |
| /* |
| * Copy sub-region of back buffer to front buffer |
| */ |
| void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| /* If we're swapping the buffer associated with the current context |
| * we have to flush any pending rendering commands first. |
| */ |
| if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) |
| _mesa_notifySwapBuffers(ctx); |
| |
| if (!b->backxrb) { |
| /* single buffered */ |
| return; |
| } |
| |
| if (b->db_mode) { |
| int yTop = b->mesa_buffer.Height - y - height; |
| if (b->backxrb->ximage) { |
| /* Copy Ximage from host's memory to server's window */ |
| #if defined(USE_XSHM) |
| if (b->shm) { |
| /* XXX assuming width and height aren't too large! */ |
| XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, |
| b->swapgc, |
| b->backxrb->ximage, x, yTop, |
| x, yTop, width, height, False ); |
| /* wait for finished event??? */ |
| } |
| else |
| #endif |
| { |
| /* XXX assuming width and height aren't too large! */ |
| XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, |
| b->swapgc, |
| b->backxrb->ximage, x, yTop, |
| x, yTop, width, height ); |
| } |
| } |
| else { |
| /* Copy pixmap to window on server */ |
| XMesaCopyArea( b->xm_visual->display, |
| b->backxrb->pixmap, /* source drawable */ |
| b->frontxrb->drawable, /* dest. drawable */ |
| b->swapgc, |
| x, yTop, width, height, /* source region */ |
| x, yTop /* dest region */ |
| ); |
| } |
| } |
| } |
| |
| |
| /* |
| * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function |
| * is a way to get "under the hood" of X/Mesa so one can manipulate the |
| * back buffer directly. |
| * Output: pixmap - pointer to back buffer's Pixmap, or 0 |
| * ximage - pointer to back buffer's XImage, or NULL |
| * Return: GL_TRUE = context is double buffered |
| * GL_FALSE = context is single buffered |
| */ |
| GLboolean XMesaGetBackBuffer( XMesaBuffer b, |
| XMesaPixmap *pixmap, |
| XMesaImage **ximage ) |
| { |
| if (b->db_mode) { |
| if (pixmap) |
| *pixmap = b->backxrb->pixmap; |
| if (ximage) |
| *ximage = b->backxrb->ximage; |
| return GL_TRUE; |
| } |
| else { |
| *pixmap = 0; |
| *ximage = NULL; |
| return GL_FALSE; |
| } |
| } |
| |
| |
| /* |
| * 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 ) |
| { |
| struct gl_renderbuffer *rb |
| = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; |
| struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb); |
| |
| if (!xrb || !xrb->Base.Buffer) { |
| *width = 0; |
| *height = 0; |
| *bytesPerValue = 0; |
| *buffer = 0; |
| return GL_FALSE; |
| } |
| else { |
| *width = b->mesa_buffer.Width; |
| *height = b->mesa_buffer.Height; |
| *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 |
| ? sizeof(GLushort) : sizeof(GLuint); |
| *buffer = (void *) xrb->Base.Buffer; |
| return GL_TRUE; |
| } |
| } |
| |
| |
| void XMesaFlush( XMesaContext c ) |
| { |
| if (c && c->xm_visual) { |
| XSync( c->xm_visual->display, False ); |
| } |
| } |
| |
| |
| |
| 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->frontxrb->drawable == d && b->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->display == dpy) { |
| xmesa_free_buffer(b); |
| } |
| } |
| } |
| |
| |
| /* |
| * Look for XMesaBuffers whose X window has been destroyed. |
| * Deallocate any such XMesaBuffers. |
| */ |
| void XMesaGarbageCollect( XMesaDisplay* dpy ) |
| { |
| XMesaBuffer b, next; |
| for (b=XMesaBufferList; b; b=next) { |
| next = b->Next; |
| if (b->display && b->display == dpy && b->frontxrb->drawable && b->type == WINDOW) { |
| XSync(b->display, False); |
| if (!window_exists( b->display, b->frontxrb->drawable )) { |
| /* found a dead window, free the ancillary info */ |
| XMesaDestroyBuffer( b ); |
| } |
| } |
| } |
| } |
| |
| |
| unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, |
| GLfloat red, GLfloat green, |
| GLfloat blue, GLfloat alpha ) |
| { |
| GLint r = (GLint) (red * 255.0F); |
| GLint g = (GLint) (green * 255.0F); |
| GLint b = (GLint) (blue * 255.0F); |
| GLint a = (GLint) (alpha * 255.0F); |
| |
| switch (xmesa->pixelformat) { |
| case PF_Truecolor: |
| { |
| unsigned long p; |
| PACK_TRUECOLOR( p, r, g, b ); |
| return p; |
| } |
| case PF_8A8B8G8R: |
| return PACK_8A8B8G8R( r, g, b, a ); |
| case PF_8A8R8G8B: |
| return PACK_8A8R8G8B( r, g, b, a ); |
| case PF_8R8G8B: |
| return PACK_8R8G8B( r, g, b ); |
| case PF_5R6G5B: |
| return PACK_5R6G5B( r, g, b ); |
| case PF_Dither_5R6G5B: |
| /* fall through */ |
| case PF_Dither_True: |
| { |
| unsigned long p; |
| PACK_TRUEDITHER(p, x, y, r, g, b); |
| return p; |
| } |
| default: |
| _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); |
| } |
| 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); |
| } |
| |
| |
| static GLint |
| xbuffer_to_renderbuffer(int buffer) |
| { |
| assert(MAX_AUX_BUFFERS <= 4); |
| |
| switch (buffer) { |
| case GLX_FRONT_LEFT_EXT: |
| return BUFFER_FRONT_LEFT; |
| case GLX_FRONT_RIGHT_EXT: |
| return BUFFER_FRONT_RIGHT; |
| case GLX_BACK_LEFT_EXT: |
| return BUFFER_BACK_LEFT; |
| case GLX_BACK_RIGHT_EXT: |
| return BUFFER_BACK_RIGHT; |
| case GLX_AUX0_EXT: |
| return BUFFER_AUX0; |
| case GLX_AUX1_EXT: |
| case GLX_AUX2_EXT: |
| case GLX_AUX3_EXT: |
| case GLX_AUX4_EXT: |
| case GLX_AUX5_EXT: |
| case GLX_AUX6_EXT: |
| case GLX_AUX7_EXT: |
| case GLX_AUX8_EXT: |
| case GLX_AUX9_EXT: |
| default: |
| /* BadValue error */ |
| return -1; |
| } |
| } |
| |
| |
| PUBLIC void |
| XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, |
| const int *attrib_list) |
| { |
| #if 0 |
| GET_CURRENT_CONTEXT(ctx); |
| const GLuint unit = ctx->Texture.CurrentUnit; |
| struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; |
| struct gl_texture_object *texObj; |
| #endif |
| struct gl_renderbuffer *rb; |
| struct xmesa_renderbuffer *xrb; |
| GLint b; |
| XMesaImage *img = NULL; |
| GLboolean freeImg = GL_FALSE; |
| |
| b = xbuffer_to_renderbuffer(buffer); |
| if (b < 0) |
| return; |
| |
| if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) |
| return; /* BadMatch error */ |
| |
| rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; |
| if (!rb) { |
| /* invalid buffer */ |
| return; |
| } |
| xrb = xmesa_renderbuffer(rb); |
| |
| #if 0 |
| switch (drawable->TextureTarget) { |
| case GLX_TEXTURE_1D_EXT: |
| texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX]; |
| break; |
| case GLX_TEXTURE_2D_EXT: |
| texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX]; |
| break; |
| case GLX_TEXTURE_RECTANGLE_EXT: |
| texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX]; |
| break; |
| default: |
| return; /* BadMatch error */ |
| } |
| #endif |
| |
| /* |
| * The following is a quick and simple way to implement |
| * BindTexImage. The better way is to write some new FetchTexel() |
| * functions which would extract texels from XImages. We'd still |
| * need to use GetImage when texturing from a Pixmap (front buffer) |
| * but texturing from a back buffer (XImage) would avoid an image |
| * copy. |
| */ |
| |
| /* get XImage */ |
| if (xrb->pixmap) { |
| img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, |
| ZPixmap); |
| freeImg = GL_TRUE; |
| } |
| else if (xrb->ximage) { |
| img = xrb->ximage; |
| } |
| |
| /* store the XImage as a new texture image */ |
| if (img) { |
| GLenum format, type, intFormat; |
| if (img->bits_per_pixel == 32) { |
| format = GL_BGRA; |
| type = GL_UNSIGNED_BYTE; |
| intFormat = GL_RGBA; |
| } |
| else if (img->bits_per_pixel == 24) { |
| format = GL_BGR; |
| type = GL_UNSIGNED_BYTE; |
| intFormat = GL_RGB; |
| } |
| else if (img->bits_per_pixel == 16) { |
| format = GL_BGR; |
| type = GL_UNSIGNED_SHORT_5_6_5; |
| intFormat = GL_RGB; |
| } |
| else { |
| _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); |
| return; |
| } |
| if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { |
| intFormat = GL_RGBA; |
| } |
| else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { |
| intFormat = GL_RGB; |
| } |
| |
| _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, |
| format, type, img->data); |
| |
| if (freeImg) { |
| XMesaDestroyImage(img); |
| } |
| } |
| } |
| |
| |
| |
| PUBLIC void |
| XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) |
| { |
| const GLint b = xbuffer_to_renderbuffer(buffer); |
| if (b < 0) |
| return; |
| |
| /* no-op for now */ |
| } |
| |