/* * 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 "GL/xmesa.h" #include "xmesaP.h" #include "context.h" #include "extensions.h" #include "framebuffer.h" #include "glthread.h" #include "imports.h" #include "macros.h" #include "renderbuffer.h" #include "teximage.h" #include "vbo/vbo.h" #include "state_tracker/st_public.h" #include "state_tracker/st_context.h" #include "pipe/softpipe/sp_context.h" #include "pipe/p_defines.h" /** * Global X driver lock */ _glthread_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 */ static int check_for_xshm( XMesaDisplay *display ) { #if defined(USE_XSHM) && !defined(XFree86Server) int major, minor, ignore; Bool pixmaps; 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 } /** * 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 * _mesa_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 ) { #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, 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; } #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 */ void xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, GLuint *width, GLuint *height) { #ifdef XFree86Server *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); #else 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; } #endif } /**********************************************************************/ /***** 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; struct pipe_winsys *winsys = xmesa_get_pipe_winsys(); 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; /* * Create framebuffer, but we'll plug in our own renderbuffers below. */ b->stfb = st_create_framebuffer(&vis->mesa_visual, GL_FALSE, (void *) b); fb = &b->stfb->Base; fb->Delete = xmesa_delete_framebuffer; /* * XXX we want to create surfaces for pipe, not renderbuffers for Mesa. */ /* * Front renderbuffer */ b->frontxrb = xmesa_create_renderbuffer(winsys, 0, &vis->mesa_visual, GL_FALSE); if (!b->frontxrb) { _mesa_free(b); return NULL; } b->frontxrb->Parent = b; b->frontxrb->drawable = d; b->frontxrb->pixmap = (XMesaPixmap) d; _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &b->frontxrb->St.Base); /* * Back renderbuffer */ if (vis->mesa_visual.doubleBufferMode) { b->backxrb = xmesa_create_renderbuffer(winsys, 0, &vis->mesa_visual, GL_TRUE); if (!b->backxrb) { /* XXX free front xrb too */ _mesa_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(fb, BUFFER_BACK_LEFT, &b->backxrb->St.Base); } /* * Software alpha planes */ if (vis->mesa_visual.alphaBits > 0 && vis->undithered_pf != PF_8A8B8G8R && vis->undithered_pf != PF_8A8R8G8B) { /* Visual has alpha, but pixel format doesn't support it. * We'll use an alpha renderbuffer wrapper. */ b->swAlpha = GL_TRUE; } else { b->swAlpha = GL_FALSE; } if (vis->mesa_visual.depthBits > 0 && vis->mesa_visual.stencilBits > 0) { /* combined depth/stencil */ struct gl_renderbuffer *rb = st_new_renderbuffer_fb(GL_DEPTH24_STENCIL8_EXT); _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb); _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb); } else { if (vis->mesa_visual.depthBits > 0) { struct gl_renderbuffer *rb = st_new_renderbuffer_fb(GL_DEPTH_COMPONENT32); _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb); } if (vis->mesa_visual.stencilBits > 0) { struct gl_renderbuffer *rb = st_new_renderbuffer_fb(GL_STENCIL_INDEX8_EXT); _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb); } } if (vis->mesa_visual.accumRedBits > 0) { struct gl_renderbuffer *rb = st_new_renderbuffer_fb(GL_RGBA16); _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb); } /* * Other renderbuffer (depth, stencil, etc) */ _mesa_add_soft_renderbuffers(fb, GL_FALSE, /* color */ GL_FALSE, /*vis->mesa_visual.haveDepthBuffer,*/ GL_FALSE, /* stencil */ GL_FALSE, /* accum */ b->swAlpha, 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->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->frontxrb->drawable = 0; /* Unreference. If count = zero we'll really delete the buffer */ _mesa_unreference_framebuffer(&fb); return; } /* continue search */ prev = b; } /* buffer not found in XMesaBufferList */ _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); } /** * Copy X color table stuff from one XMesaBuffer to another. */ static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) { MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); dst->num_alloced = src->num_alloced; MEMCPY(dst->alloced_colors, src->alloced_colors, sizeof(src->alloced_colors)); } /**********************************************************************/ /***** Misc Private Functions *****/ /**********************************************************************/ /** * A replacement for XAllocColor. This function should never * fail to allocate a color. When XAllocColor fails, we return * the nearest matching color. If we have to allocate many colors * this function isn't too efficient; the XQueryColors() could be * done just once. * Written by Michael Pichler, Brian Paul, Mark Kilgard * Input: dpy - X display * cmap - X colormap * cmapSize - size of colormap * In/Out: color - the XColor struct * Output: exact - 1=exact color match, 0=closest match * alloced - 1=XAlloc worked, 0=XAlloc failed */ static void noFaultXAllocColor( int client, XMesaDisplay *dpy, XMesaColormap cmap, int cmapSize, XMesaColor *color, int *exact, int *alloced ) { #ifdef XFree86Server Pixel *ppixIn; xrgb *ctable; #else /* we'll try to cache ctable for better remote display performance */ static Display *prevDisplay = NULL; static XMesaColormap prevCmap = 0; static int prevCmapSize = 0; static XMesaColor *ctable = NULL; #endif XMesaColor subColor; int i, bestmatch; double mindist; /* 3*2^16^2 exceeds long int precision. */ (void) client; /* First try just using XAllocColor. */ #ifdef XFree86Server if (AllocColor(cmap, &color->red, &color->green, &color->blue, &color->pixel, client) == Success) #else if (XAllocColor(dpy, cmap, color)) #endif { *exact = 1; *alloced = 1; return; } /* Alloc failed, search for closest match */ /* Retrieve color table entries. */ /* XXX alloca candidate. */ #ifdef XFree86Server ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); for (i = 0; i < cmapSize; i++) { ppixIn[i] = i; } QueryColors(cmap, cmapSize, ppixIn, ctable); #else if (prevDisplay != dpy || prevCmap != cmap || prevCmapSize != cmapSize || !ctable) { /* free previously cached color table */ if (ctable) _mesa_free(ctable); /* Get the color table from X */ ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); assert(ctable); for (i = 0; i < cmapSize; i++) { ctable[i].pixel = i; } XQueryColors(dpy, cmap, ctable, cmapSize); prevDisplay = dpy; prevCmap = cmap; prevCmapSize = cmapSize; } #endif /* Find best match. */ bestmatch = -1; mindist = 0.0; for (i = 0; i < cmapSize; i++) { double dr = 0.30 * ((double) color->red - (double) ctable[i].red); double dg = 0.59 * ((double) color->green - (double) ctable[i].green); double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); double dist = dr * dr + dg * dg + db * db; if (bestmatch < 0 || dist < mindist) { bestmatch = i; mindist = dist; } } /* Return result. */ subColor.red = ctable[bestmatch].red; subColor.green = ctable[bestmatch].green; subColor.blue = ctable[bestmatch].blue; /* Try to allocate the closest match color. This should only * fail if the cell is read/write. Otherwise, we're incrementing * the cell's reference count. */ #ifdef XFree86Server if (AllocColor(cmap, &subColor.red, &subColor.green, &subColor.blue, &subColor.pixel, client) == Success) { #else if (XAllocColor(dpy, cmap, &subColor)) { #endif *alloced = 1; } else { /* do this to work around a problem reported by Frank Ortega */ subColor.pixel = (unsigned long) bestmatch; subColor.red = ctable[bestmatch].red; subColor.green = ctable[bestmatch].green; subColor.blue = ctable[bestmatch].blue; subColor.flags = DoRed | DoGreen | DoBlue; *alloced = 0; } #ifdef XFree86Server _mesa_free(ppixIn); _mesa_free(ctable); #else /* don't free table, save it for next time */ #endif *color = subColor; *exact = 0; } /** * Do setup for PF_GRAYSCALE pixel format. * Note that buffer may be NULL. */ static GLboolean setup_grayscale(int client, XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) { if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { return GL_FALSE; } if (buffer) { XMesaBuffer prevBuffer; if (!cmap) { return GL_FALSE; } prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); if (prevBuffer && (buffer->xm_visual->mesa_visual.rgbMode == prevBuffer->xm_visual->mesa_visual.rgbMode)) { /* Copy colormap stuff from previous XMesaBuffer which uses same * X colormap. Do this to avoid time spent in noFaultXAllocColor. */ copy_colortable_info(buffer, prevBuffer); } else { /* Allocate 256 shades of gray */ int gray; int colorsfailed = 0; for (gray=0;gray<256;gray++) { GLint r = gamma_adjust( v->RedGamma, gray, 255 ); GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); int exact, alloced; XMesaColor xcol; xcol.red = (r << 8) | r; xcol.green = (g << 8) | g; xcol.blue = (b << 8) | b; noFaultXAllocColor( client, v->display, cmap, GET_COLORMAP_SIZE(v), &xcol, &exact, &alloced ); if (!exact) { colorsfailed++; } if (alloced) { assert(buffer->num_alloced<256); buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; buffer->num_alloced++; } /*OLD assert(gray < 576); buffer->color_table[gray*3+0] = xcol.pixel; buffer->color_table[gray*3+1] = xcol.pixel; buffer->color_table[gray*3+2] = xcol.pixel; assert(xcol.pixel < 65536); buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; */ buffer->color_table[gray] = xcol.pixel; assert(xcol.pixel < 65536); buffer->pixel_to_r[xcol.pixel] = gray; buffer->pixel_to_g[xcol.pixel] = gray; buffer->pixel_to_b[xcol.pixel] = gray; } if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { _mesa_warning(NULL, "Note: %d out of 256 needed colors do not match exactly.\n", colorsfailed ); } } } v->dithered_pf = PF_Grayscale; v->undithered_pf = PF_Grayscale; return GL_TRUE; } /** * Setup RGB rendering for a window with a PseudoColor, StaticColor, * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB * color. While this function was originally designed just for 8-bit * visuals, it has also proven to work from 4-bit up to 16-bit visuals. * Dithering code contributed by Bob Mercier. */ static GLboolean setup_dithered_color(int client, XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) { if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { return GL_FALSE; } if (buffer) { XMesaBuffer prevBuffer; if (!cmap) { return GL_FALSE; } prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); if (prevBuffer && (buffer->xm_visual->mesa_visual.rgbMode == prevBuffer->xm_visual->mesa_visual.rgbMode)) { /* Copy colormap stuff from previous, matching XMesaBuffer. * Do this to avoid time spent in noFaultXAllocColor. */ copy_colortable_info(buffer, prevBuffer); } else { /* Allocate X colors and initialize color_table[], red_table[], etc */ int r, g, b, i; int colorsfailed = 0; for (r = 0; r < DITH_R; r++) { for (g = 0; g < DITH_G; g++) { for (b = 0; b < DITH_B; b++) { XMesaColor xcol; int exact, alloced; xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); noFaultXAllocColor( client, v->display, cmap, GET_COLORMAP_SIZE(v), &xcol, &exact, &alloced ); if (!exact) { colorsfailed++; } if (alloced) { assert(buffer->num_alloced<256); buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; buffer->num_alloced++; } i = DITH_MIX( r, g, b ); assert(i < 576); buffer->color_table[i] = xcol.pixel; assert(xcol.pixel < 65536); buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); } } } if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { _mesa_warning(NULL, "Note: %d out of %d needed colors do not match exactly.\n", colorsfailed, DITH_R * DITH_G * DITH_B ); } } } v->dithered_pf = PF_Dither; v->undithered_pf = PF_Lookup; return GL_TRUE; } /** * 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; } } /** * Setup RGB rendering for a window with a monochrome visual. */ static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) { (void) b; v->dithered_pf = v->undithered_pf = PF_1Bit; /* if black=1 then we must flip pixel values */ v->bitFlip = (GET_BLACK_PIXEL(v) != 0); } /** * 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) { int client = 0; #ifdef XFree86Server 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: * Even if the visual is TrueColor or DirectColor we treat it as * being color indexed. This is weird but might be useful to someone. */ v->dithered_pf = v->undithered_pf = PF_Index; v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); } 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) { setup_truecolor( v, b, cmap ); } else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { setup_monochrome( v, b ); } else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { if (!setup_grayscale( client, v, b, cmap )) { return GL_FALSE; } } else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { if (!setup_dithered_color( client, v, b, cmap )) { return GL_FALSE; } } 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")) { _mesa_printf("X/Mesa visual = %p\n", (void *) v); _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); _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) { char *data; /* 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 */ #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 ); /* cleargc - for glClear() */ #ifdef XFree86Server b->cleargc = CreateScratchGC(v->display, window->depth); #else b->cleargc = XCreateGC( v->display, window, 0, NULL ); #endif XMesaSetFunction( v->display, b->cleargc, GXcopy ); /* * Don't generate Graphics Expose/NoExpose events in swapbuffers(). * Patch contributed by Michael Pichler May 15, 1995. */ #ifdef XFree86Server b->swapgc = CreateScratchGC(v->display, window->depth); { CARD32 v[1]; v[0] = FALSE; dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); } #else { XGCValues gcvalues; gcvalues.graphics_exposures = False; b->swapgc = XCreateGC(v->display, window, GCGraphicsExposures, &gcvalues); } #endif XMesaSetFunction( v->display, b->swapgc, GXcopy ); /* Initialize the row buffer XImage for use in write_color_span() */ data = (char*) MALLOC(MAX_WIDTH*4); #ifdef XFree86Server b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data); #else b->rowimage = XCreateImage( v->display, v->visinfo->visual, v->visinfo->depth, ZPixmap, 0, /*format, offset*/ data, /*data*/ MAX_WIDTH, 1, /*width, height*/ 32, /*bitmap_pad*/ 0 /*bytes_per_line*/ ); #endif if (!b->rowimage) return GL_FALSE; } return GL_TRUE; } /* * Convert an RGBA color to a pixel value. */ unsigned long xmesa_color_to_pixel(XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLuint pixelFormat) { GLcontext *ctx = xmesa->st->ctx; switch (pixelFormat) { case PF_Index: return 0; 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: { DITHER_SETUP; return DITHER( 1, 0, r, g, b ); } case PF_1Bit: /* 382 = (3*255)/2 */ return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; case PF_Lookup: { LOOKUP_SETUP; return LOOKUP( r, g, b ); } case PF_Grayscale: return GRAY_RGB( 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; #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 /* 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; #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); } static void finish_or_flush( GLcontext *ctx ) { #ifdef XFree86Server /* NOT_NEEDED */ #else const XMesaContext xmesa = XMESA_CONTEXT(ctx); ctx->st->pipe->flush(ctx->st->pipe, 0); if (xmesa) { _glthread_LOCK_MUTEX(_xmesa_lock); XSync( xmesa->display, False ); _glthread_UNLOCK_MUTEX(_xmesa_lock); } #endif } /** * Called by glViewport. * This is a good time for us to poll the current X window size and adjust * our renderbuffers to match the current window size. * Remember, we have no opportunity to respond to conventional * X Resize/StructureNotify events since the X driver has no event loop. * Thus, we poll. * Note that this trick isn't fool-proof. If the application never calls * glViewport, our notion of the current window size may be incorrect. * That problem led to the GLX_MESA_resize_buffers extension. */ static void xmesa_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h) { XMesaContext xmctx = XMESA_CONTEXT(ctx); XMesaBuffer xmdrawbuf = XMESA_BUFFER(ctx->WinSysDrawBuffer); XMesaBuffer xmreadbuf = XMESA_BUFFER(ctx->WinSysReadBuffer); xmesa_check_and_update_buffer_size(xmctx, xmdrawbuf); xmesa_check_and_update_buffer_size(xmctx, xmreadbuf); (void) x; (void) y; (void) w; (void) h; } /** * Initialize the device driver function table with the functions * we implement in this driver. */ static void xmesa_init_driver_functions(struct dd_function_table *driver) { #if 0 /* not needed for now */ driver->Flush = finish_or_flush; driver->Finish = finish_or_flush; #else (void) finish_or_flush; #endif driver->Viewport = xmesa_viewport; } /** * 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_context *pipe; XMesaContext c; GLcontext *mesaCtx; if (firstTime) { _glthread_INIT_MUTEX(_xmesa_lock); firstTime = GL_FALSE; } /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ c = (XMesaContext) CALLOC_STRUCT(xmesa_context); if (!c) return NULL; pipe = xmesa_create_context( c ); c->st = st_create_context(pipe, &v->mesa_visual, share_list ? share_list->st : NULL); 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 xmesa_init_driver_functions(&mesaCtx->Driver); /* 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 */ /* override these functions, as if the xlib driver were derived from * the softpipe driver. */ pipe->get_tile = xmesa_get_tile; pipe->put_tile = xmesa_put_tile; pipe->get_tile_rgba = xmesa_get_tile_rgba; pipe->put_tile_rgba = xmesa_put_tile_rgba; c->st->haveFramebufferRegions = GL_FALSE; /* special pipe->clear function */ pipe->clear = xmesa_clear; return c; } PUBLIC void XMesaDestroyContext( XMesaContext c ) { st_destroy_context(c->st); _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 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); 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(); xmesa_check_and_update_buffer_size(c, drawBuffer); if (readBuffer != drawBuffer) xmesa_check_and_update_buffer_size(c, readBuffer); st_make_current(c->st, drawBuffer->stfb, readBuffer->stfb); #if 0 if (c->xm_visual->mesa_visual.rgbMode) { /* * Must recompute and set these pixel values because colormap * can be different for different windows. */ c->clearpixel = xmesa_color_to_pixel( c, c->clearcolor[0], c->clearcolor[1], c->clearcolor[2], c->clearcolor[3], c->xm_visual->undithered_pf); XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); } #endif /* 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 ) { 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. */ st_notify_swapbuffers(b->stfb); if (b->db_mode) { if (b->backxrb->ximage) { /* Copy Ximage (back buf) from client memory to server window */ #if defined(USE_XSHM) && !defined(XFree86Server) 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, xmesa_buffer_width(b), xmesa_buffer_height(b), 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, xmesa_buffer_width(b), xmesa_buffer_height(b)); /*_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, xmesa_buffer_width(b), xmesa_buffer_height(b), 0, 0 /* dest region */ ); /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ } if (b->swAlpha) { GET_CURRENT_CONTEXT(ctx); _mesa_copy_soft_alpha_renderbuffers(ctx, &b->stfb->Base); } } #if !defined(XFree86Server) XSync( b->xm_visual->display, False ); #endif } /* * Copy sub-region of back buffer to front buffer */ void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) { 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. */ st_notify_swapbuffers(b->stfb); if (b->db_mode) { int yTop = xmesa_buffer_height(b) - y - height; if (b->backxrb->ximage) { /* Copy Ximage from host's memory to server's window */ #if defined(USE_XSHM) && !defined(XFree86Server) 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 */ #ifndef XFree86Server 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; } } #endif /* XFree86Server */ /* * 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->stfb->Base.Attachment[BUFFER_DEPTH].Renderbuffer; if (!rb || !rb->Data) { *width = 0; *height = 0; *bytesPerValue = 0; *buffer = 0; return GL_FALSE; } else { *width = xmesa_buffer_width(b); *height = xmesa_buffer_height(b); *bytesPerValue = b->stfb->Base.Visual.depthBits <= 16 ? sizeof(GLushort) : sizeof(GLuint); *buffer = rb->Data; return GL_TRUE; } } void XMesaFlush( XMesaContext c ) { if (c && c->display) { #ifdef XFree86Server /* NOT_NEEDED */ #else XSync( c->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->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( void ) { XMesaBuffer b, next; for (b=XMesaBufferList; b; b=next) { next = b->Next; if (b->display && b->frontxrb->drawable && b->type == WINDOW) { #ifdef XFree86Server /* NOT_NEEDED */ #else XSync(b->display, False); if (!window_exists( b->display, b->frontxrb->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 ) { GLcontext *ctx = xmesa->st->ctx; 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_Index: return 0; 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: { DITHER_SETUP; return DITHER( x, y, r, g, b ); } case PF_1Bit: /* 382 = (3*255)/2 */ return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; case PF_Lookup: { LOOKUP_SETUP; return LOOKUP( r, g, b ); } case PF_Grayscale: return GRAY_RGB( 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: return BUFFER_AUX1; case GLX_AUX2_EXT: return BUFFER_AUX2; case GLX_AUX3_EXT: return BUFFER_AUX3; 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->stfb->Base.Attachment[b].Renderbuffer; if (!rb) { /* invalid buffer */ return; } xrb = xmesa_renderbuffer(rb); #if 0 switch (drawable->TextureTarget) { case GLX_TEXTURE_1D_EXT: texObj = texUnit->Current1D; break; case GLX_TEXTURE_2D_EXT: texObj = texUnit->Current2D; break; case GLX_TEXTURE_RECTANGLE_EXT: texObj = texUnit->CurrentRect; 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 */ }