diff options
Diffstat (limited to 'src/mesa/pipe/xlib/xm_api.c')
| -rw-r--r-- | src/mesa/pipe/xlib/xm_api.c | 2554 |
1 files changed, 2554 insertions, 0 deletions
diff --git a/src/mesa/pipe/xlib/xm_api.c b/src/mesa/pipe/xlib/xm_api.c new file mode 100644 index 00000000000..08c98eab486 --- /dev/null +++ b/src/mesa/pipe/xlib/xm_api.c @@ -0,0 +1,2554 @@ +/* + * 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 "swrast/swrast.h" +#include "swrast_setup/swrast_setup.h" +#include "vbo/vbo.h" +#if 0 +#include "tnl/tnl.h" +#include "tnl/t_context.h" +#include "tnl/t_pipeline.h" +#endif +#include "drivers/common/driverfuncs.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; + + + +/** + * Lookup tables for HPCR pixel format: + */ +static short hpcr_rgbTbl[3][256] = { +{ + 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, + 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, + 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, + 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, +112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, +128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, +144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, +160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, +176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, +192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, +208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, +224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 +}, +{ + 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, + 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, + 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, + 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, +112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, +128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, +144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, +160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, +176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, +192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, +208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, +224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 +}, +{ + 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, + 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, + 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, + 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, + 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, + 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, + 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, + 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, + 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, +112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, +128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, +144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, +160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, +176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, +192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, +208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 +} +}; + + + +/**********************************************************************/ +/***** 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; + + 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_framebuffer(&b->mesa_buffer, &vis->mesa_visual); + b->mesa_buffer.Delete = xmesa_delete_framebuffer; + + /* + * Front renderbuffer + */ + b->frontxrb = xmesa_create_renderbuffer(NULL, 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(&b->mesa_buffer, BUFFER_FRONT_LEFT, + &b->frontxrb->St.Base); + + /* + * Back renderbuffer + */ + if (vis->mesa_visual.doubleBufferMode) { + b->backxrb = xmesa_create_renderbuffer(NULL, 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(&b->mesa_buffer, 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(&b->mesa_buffer, BUFFER_DEPTH, rb); + _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_STENCIL, rb); + } + else { + if (vis->mesa_visual.depthBits > 0) { + struct gl_renderbuffer *rb + = st_new_renderbuffer_fb(GL_DEPTH_COMPONENT32); + _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_DEPTH, rb); + } + + if (vis->mesa_visual.stencilBits > 0) { + struct gl_renderbuffer *rb + = st_new_renderbuffer_fb(GL_STENCIL_INDEX8_EXT); + _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_STENCIL, rb); + } + } + + if (vis->mesa_visual.accumRedBits > 0) { + struct gl_renderbuffer *rb + = st_new_renderbuffer_fb(GL_RGBA16); + _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_ACCUM, rb); + } + + + /* + * Other renderbuffer (depth, stencil, etc) + */ + _mesa_add_soft_renderbuffers(&b->mesa_buffer, + 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->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_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 for Hewlett Packard Color Recovery 8-bit TrueColor mode. + * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. + * Special dithering tables have to be initialized. + */ +static void +setup_8bit_hpcr(XMesaVisual v) +{ + /* HP Color Recovery contributed by: Alex De Bruyn ([email protected]) + * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined + * on the root window AND the colormap obtainable by XGetRGBColormaps + * for that atom must be set on the window. (see also tkInitWindow) + * If that colormap is not set, the output will look stripy. + */ + + /* Setup color tables with gamma correction */ + int i; + double g; + + g = 1.0 / v->RedGamma; + for (i=0; i<256; i++) { + GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); + v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); + } + + g = 1.0 / v->GreenGamma; + for (i=0; i<256; i++) { + GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); + v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); + } + + g = 1.0 / v->BlueGamma; + for (i=0; i<256; i++) { + GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); + v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); + } + v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ + v->dithered_pf = PF_HPCR; + + /* which method should I use to clear */ + /* GL_FALSE: keep the ordinary method */ + /* GL_TRUE : clear with dither pattern */ + v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; + + if (v->hpcr_clear_flag) { + v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, + DefaultRootWindow(v->display), + 16, 2, 8); +#ifndef XFree86Server + v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, + 0, 0, 16, 2, AllPlanes, ZPixmap); +#endif + } +} + + +/** + * 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; + } + else if (GET_REDMASK(v) ==0xe0 + && GET_GREENMASK(v)==0x1c + && GET_BLUEMASK(v) ==0x03 + && CHECK_FOR_HPCR(v)) { + /* 8-bit HP color recovery */ + setup_8bit_hpcr( v ); + } +} + + + +/** + * 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 ); + /* + * Set fill style and tile pixmap once for all for HPCR stuff + * (instead of doing it each time in clear_color_HPCR_pixmap()) + * Initialize whole stuff + * Patch contributed by Jacques Leroy March 8, 1998. + */ + if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { + int i; + for (i = 0; i < 16; i++) { + XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); + XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); + } + XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, + b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); + XMesaSetFillStyle( v->display, b->cleargc, FillTiled); + XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); + } + + /* 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(GLcontext *ctx, + GLubyte r, GLubyte g, GLubyte b, GLubyte a, + GLuint pixelFormat) +{ + XMesaContext xmesa = XMESA_CONTEXT(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_HPCR: + return DITHER_HPCR(1, 1, r, g, b); + 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); +} + + + +/** + * 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; + GLcontext *mesaCtx; + struct dd_function_table functions; +#if 0 + TNLcontext *tnl; +#endif + + 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; + + mesaCtx = &(c->mesa); + + /* initialize with default driver functions, then plug in XMesa funcs */ + _mesa_init_driver_functions(&functions); + xmesa_init_driver_functions(v, &functions); + st_init_driver_functions(&functions); + + /* override st's function */ + functions.UpdateState = xmesa_update_state; + + /* + functions.NewRenderbuffer = xmesa_new_renderbuffer; + */ + + if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, + share_list ? &(share_list->mesa) : (GLcontext *) NULL, + &functions, (void *) c)) { + _mesa_free(c); + return NULL; + } + + _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); +#if ENABLE_EXT_texure_compression_s3tc + if (c->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"); +#endif +#if ENABLE_EXT_timer_query + _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); +#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 + + /* 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 ) +#if 0 + || !_vbo_CreateContext( mesaCtx ) || + !_tnl_CreateContext( mesaCtx ) || + !_swsetup_CreateContext( mesaCtx ) +#endif + ) { + _mesa_free_context_data(&c->mesa); + _mesa_free(c); + return NULL; + } + +#if 0 + /* tnl setup */ + tnl = TNL_CONTEXT(mesaCtx); + tnl->Driver.RunPipeline = _tnl_run_pipeline; +#endif + + /* swrast setup */ + xmesa_register_swrast_functions( mesaCtx ); + + + st_create_context( mesaCtx, + xmesa_create_softpipe( c ) ); + + _swsetup_CreateContext( mesaCtx ); + _swsetup_Wakeup(mesaCtx); + + /* override these functions, as if the xlib driver were derived from + * the softpipe driver. + */ +#if 0 + mesaCtx->st->pipe->surface_alloc = xmesa_surface_alloc; +#endif + mesaCtx->st->pipe->is_format_supported = xmesa_is_format_supported; + mesaCtx->st->pipe->get_tile_rgba = xmesa_get_tile_rgba; + mesaCtx->st->pipe->put_tile_rgba = xmesa_put_tile_rgba; + + mesaCtx->st->haveFramebufferRegions = GL_FALSE; + + /* special pipe->clear function */ + mesaCtx->st->pipe->clear = xmesa_clear; + + return c; +} + + + +PUBLIC +void XMesaDestroyContext( XMesaContext c ) +{ + GLcontext *mesaCtx = &c->mesa; + +#ifdef FX + FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) ); +#endif + + _swsetup_DestroyContext( mesaCtx ); + _swrast_DestroyContext( mesaCtx ); +#if 0 + _tnl_DestroyContext( mesaCtx ); + _vbo_DestroyContext( mesaCtx ); +#endif + _mesa_free_context_data( mesaCtx ); + _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->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, 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); + if (drawBuffer->mesa_buffer.Width != width || + drawBuffer->mesa_buffer.Height != height) { + GLcontext *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; + +#ifdef FX + if (FXmakeCurrent( drawBuffer )) + return GL_TRUE; +#endif + + /* 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); + + 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->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; + } +} + + +#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 ) +{ + 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) { +#ifdef FX + if (FXswapBuffers(b)) + return; +#endif + 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, 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);*/ + } + + if (b->swAlpha) + _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); + } +#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 ) +{ + 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; +#ifdef FX + if (FXswapBuffers(b)) + return; +#endif + 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->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; + if (!rb || !rb->Data) { + *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 = rb->Data; + return GL_TRUE; + } +} + + +void XMesaFlush( XMesaContext c ) +{ + if (c && c->xm_visual) { +#ifdef XFree86Server + /* NOT_NEEDED */ +#else + XSync( c->xm_visual->display, False ); +#endif + } +} + + + +const char *XMesaGetString( XMesaContext c, int name ) +{ + (void) c; + if (name==XMESA_VERSION) { + return "5.0"; + } + else if (name==XMESA_EXTENSIONS) { + return ""; + } + else { + return NULL; + } +} + + + +XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) +{ + XMesaBuffer b; + for (b=XMesaBufferList; b; b=b->Next) { + if (b->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->mesa; + 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_HPCR: + return DITHER_HPCR(x, y, r, g, b); + 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->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->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 */ +} + |