diff options
Diffstat (limited to 'src/mesa/drivers/x11/xm_api.c')
| -rw-r--r-- | src/mesa/drivers/x11/xm_api.c | 2624 |
1 files changed, 2624 insertions, 0 deletions
diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c new file mode 100644 index 0000000000..88650d675a --- /dev/null +++ b/src/mesa/drivers/x11/xm_api.c @@ -0,0 +1,2624 @@ +/* $Id: xm_api.c,v 1.1 2000/09/07 15:40:30 brianp Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.3 + * + * Copyright (C) 1999-2000 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. + */ + + +/* + * This file contains the implementations of all the XMesa* 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 "glthread.h" +#include "matrix.h" +#include "mem.h" +#include "types.h" +#ifdef HAVE_CONFIG_H +#include "conf.h" +#endif + + +#ifndef GLX_NONE_EXT +#define GLX_NONE_EXT 0x8000 +#endif + + +/* + * 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 *****/ +/**********************************************************************/ + + +/* + * X/Mesa error reporting function: + */ +static void error( const char *msg ) +{ + if (getenv("MESA_DEBUG")) + fprintf( stderr, "X/Mesa error: %s\n", msg ); +} + + +/* + * 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 + + +/* + * Error handling. + */ +#ifndef XFree86Server +static int mesaXErrorFlag = 0; + +static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) +{ + (void) dpy; + (void) event; + mesaXErrorFlag = 1; + return 0; +} +#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 + */ +#ifndef XFree86Server +static int check_for_xshm( XMesaDisplay *display ) +{ +#ifdef USE_XSHM + 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 + /* Can't compile XSHM support */ + return 0; +#endif +} +#endif + + +/* + * Return the width and height of the given drawable. + */ +static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, + unsigned int *width, unsigned int *height) +{ +#ifdef XFree86Server + (void) dpy; + *width = d->width; + *height = d->height; +#else + Window root; + int x, y; + unsigned int bw, depth; + + _glthread_LOCK_MUTEX(_xmesa_lock); + XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); + _glthread_UNLOCK_MUTEX(_xmesa_lock); +#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 (GLint) ((GLfloat) max * pow( x, 1.0F/gamma ) + 0.5F); + } +} + + + +/* + * 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 + */ +#define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv) + +#ifdef XFree86Server + +static int bits_per_pixel( XMesaVisual xmv ) +{ + XMesaVisualInfo visinfo = xmv->visinfo; + const int depth = visinfo->nplanes; + int i; + 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 + +static int bits_per_pixel( XMesaVisual xmv ) +{ + XMesaDisplay *dpy = xmv->display; + XMesaVisualInfo visinfo = xmv->visinfo; + XMesaImage *img; + int bitsPerPixel; + /* Create a temporary XImage */ + img = XCreateImage( dpy, visinfo->visual, visinfo->depth, + ZPixmap, 0, /*format, offset*/ + (char*) MALLOC(8), /*data*/ + 1, 1, /*width, height*/ + 32, /*bitmap_pad*/ + 0 /*bytes_per_line*/ + ); + assert(img); + /* grab the bits/pixel value */ + bitsPerPixel = img->bits_per_pixel; + /* free the XImage */ + FREE( img->data ); + img->data = NULL; + XMesaDestroyImage( img ); + return bitsPerPixel; +} +#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; +} +#endif + + + +/**********************************************************************/ +/***** Linked list of XMesaBuffers *****/ +/**********************************************************************/ + +static XMesaBuffer XMesaBufferList = NULL; + + +/* Allocate a new XMesaBuffer, add to linked list */ +static XMesaBuffer alloc_xmesa_buffer(void) +{ + XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); + if (b) { + b->Next = XMesaBufferList; + XMesaBufferList = b; + } + return b; +} + + +/* + * Find an XMesaBuffer by matching X display and colormap but NOT matching + * the notThis buffer. + */ +static XMesaBuffer find_xmesa_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; +} + + +/* + * Free an XMesaBuffer, remove from linked list, perhaps free X colormap + * entries. + */ +static void free_xmesa_buffer(int client, XMesaBuffer buffer) +{ + XMesaBuffer prev = NULL, b; + (void) client; + for (b=XMesaBufferList; b; b=b->Next) { + if (b==buffer) { + /* unlink bufer from list */ + if (prev) + prev->Next = buffer->Next; + else + XMesaBufferList = buffer->Next; + /* Check to free X colors */ + if (buffer->num_alloced>0) { + /* If no other buffer uses this X colormap then free the colors. */ + if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { +#ifdef XFree86Server + (void)FreeColors(buffer->cmap, client, + buffer->num_alloced, buffer->alloced_colors, + 0); +#else + XFreeColors(buffer->display, buffer->cmap, + buffer->alloced_colors, buffer->num_alloced, 0); +#endif + } + } + FREE(buffer); + return; + } + /* continue search */ + prev = b; + } + /* buffer not found in XMesaBufferList */ + gl_problem(NULL,"free_xmesa_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 *****/ +/**********************************************************************/ + + +/* + * Return number of bits set in n. + */ +static int bitcount( unsigned long n ) +{ + int bits; + for (bits=0; n>0; n=n>>1) { + if (n&1) { + bits++; + } + } + return bits; +} + + + +/* + * Allocate a shared memory XImage back buffer for the given XMesaBuffer. + * Return: GL_TRUE if success, GL_FALSE if error + */ +#ifndef XFree86Server +static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) +{ +#ifdef USE_XSHM + /* + * We have to do a _lot_ of error checking here to be sure we can + * really use the XSHM extension. It seems different servers trigger + * errors at different points if the extension won't work. Therefore + * we have to be very careful... + */ + GC gc; + int (*old_handler)( XMesaDisplay *, XErrorEvent * ); + + b->backimage = XShmCreateImage( b->xm_visual->display, + b->xm_visual->visinfo->visual, + b->xm_visual->visinfo->depth, + ZPixmap, NULL, &b->shminfo, + b->width, b->height ); + if (b->backimage == NULL) { + error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); + b->shm = 0; + return GL_FALSE; + } + + b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line + * b->backimage->height, IPC_CREAT|0777 ); + if (b->shminfo.shmid < 0) { + if (getenv("MESA_DEBUG")) + perror("alloc_back_buffer"); + XDestroyImage( b->backimage ); + b->backimage = NULL; + error("alloc_back_buffer: Shared memory error (shmget), disabling."); + b->shm = 0; + return GL_FALSE; + } + + b->shminfo.shmaddr = b->backimage->data + = (char*)shmat( b->shminfo.shmid, 0, 0 ); + if (b->shminfo.shmaddr == (char *) -1) { + if (getenv("MESA_DEBUG")) + perror("alloc_back_buffer"); + XDestroyImage( b->backimage ); + shmctl( b->shminfo.shmid, IPC_RMID, 0 ); + b->backimage = NULL; + error("alloc_back_buffer: Shared memory error (shmat), disabling."); + b->shm = 0; + return GL_FALSE; + } + + b->shminfo.readOnly = False; + mesaXErrorFlag = 0; + old_handler = XSetErrorHandler( mesaHandleXError ); + /* This may trigger the X protocol error we're ready to catch: */ + XShmAttach( b->xm_visual->display, &b->shminfo ); + XSync( b->xm_visual->display, False ); + + if (mesaXErrorFlag) { + /* we are on a remote display, this error is normal, don't print it */ + XFlush( b->xm_visual->display ); + mesaXErrorFlag = 0; + XDestroyImage( b->backimage ); + shmdt( b->shminfo.shmaddr ); + shmctl( b->shminfo.shmid, IPC_RMID, 0 ); + b->backimage = NULL; + b->shm = 0; + (void) XSetErrorHandler( old_handler ); + return GL_FALSE; + } + + shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ + + /* Finally, try an XShmPutImage to be really sure the extension works */ + gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); + XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, + b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); + XSync( b->xm_visual->display, False ); + XFreeGC( b->xm_visual->display, gc ); + (void) XSetErrorHandler( old_handler ); + if (mesaXErrorFlag) { + XFlush( b->xm_visual->display ); + mesaXErrorFlag = 0; + XDestroyImage( b->backimage ); + shmdt( b->shminfo.shmaddr ); + shmctl( b->shminfo.shmid, IPC_RMID, 0 ); + b->backimage = NULL; + b->shm = 0; + return GL_FALSE; + } + + if (b->backimage) { + int height = b->backimage->height; + /* Needed by PIXELADDR1 macro */ + b->ximage_width1 = b->backimage->bytes_per_line; + b->ximage_origin1 = (GLubyte *) b->backimage->data + + b->ximage_width1 * (height-1); + /* Needed by PIXELADDR2 macro */ + b->ximage_width2 = b->backimage->bytes_per_line / 2; + b->ximage_origin2 = (GLushort *) b->backimage->data + + b->ximage_width2 * (height-1); + /* Needed by PIXELADDR3 macro */ + b->ximage_width3 = b->backimage->bytes_per_line; + b->ximage_origin3 = (GLubyte *) b->backimage->data + + b->ximage_width3 * (height-1); + /* Needed by PIXELADDR4 macro */ + b->ximage_width4 = b->backimage->width; + b->ximage_origin4 = (GLuint *) b->backimage->data + + b->ximage_width4 * (height-1); + } + + return GL_TRUE; +#else + /* Can't compile XSHM support */ + return GL_FALSE; +#endif +} +#endif + + + +/* + * Setup an off-screen pixmap or Ximage to use as the back buffer. + * Input: b - the X/Mesa buffer + */ +void xmesa_alloc_back_buffer( XMesaBuffer b ) +{ + if (b->db_state==BACK_XIMAGE) { + /* Deallocate the old backimage, if any */ + if (b->backimage) { +#if defined(USE_XSHM) && !defined(XFree86Server) + if (b->shm) { + XShmDetach( b->xm_visual->display, &b->shminfo ); + XDestroyImage( b->backimage ); + shmdt( b->shminfo.shmaddr ); + } + else +#endif + XMesaDestroyImage( b->backimage ); + b->backimage = NULL; + } + + /* Allocate new back buffer */ +#ifdef XFree86Server + { + /* Allocate a regular XImage for the back buffer. */ + b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, + b->width, b->height, NULL); +#else + if (b->shm==0 + || alloc_shm_back_buffer(b)==GL_FALSE + ) { + /* Allocate a regular XImage for the back buffer. */ + b->backimage = XCreateImage( b->xm_visual->display, + b->xm_visual->visinfo->visual, + GET_VISUAL_DEPTH(b->xm_visual), + ZPixmap, 0, /* format, offset */ + NULL, b->width, b->height, + 8, 0 ); /* pad, bytes_per_line */ +#endif + if (!b->backimage) { + error("alloc_back_buffer: XCreateImage failed."); + } + b->backimage->data = (char *) MALLOC( b->backimage->height + * b->backimage->bytes_per_line ); + if (!b->backimage->data) { + error("alloc_back_buffer: MALLOC failed."); + XMesaDestroyImage( b->backimage ); + b->backimage = NULL; + } + } + b->backpixmap = None; + } + else if (b->db_state==BACK_PIXMAP) { + XMesaPixmap old_pixmap = b->backpixmap; + /* Free the old back pixmap */ + if (b->backpixmap) { + XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); + } + /* Allocate new back pixmap */ + b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, + b->width, b->height, + GET_VISUAL_DEPTH(b->xm_visual) ); + b->backimage = NULL; + /* update other references to backpixmap */ + if (b->buffer==(XMesaDrawable)old_pixmap) { + b->buffer = (XMesaDrawable)b->backpixmap; + } + } +} + + + +/* + * 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) + 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 + FREE(ppixIn); + 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 = find_xmesa_buffer(v->display, cmap, buffer); + if (prevBuffer && + (buffer->xm_visual->gl_visual->RGBAflag == + prevBuffer->xm_visual->gl_visual->RGBAflag)) { + /* 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 && getenv("MESA_DEBUG")) { + fprintf( stderr, + "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 = find_xmesa_buffer(v->display, cmap, buffer); + if (prevBuffer && + (buffer->xm_visual->gl_visual->RGBAflag == + prevBuffer->xm_visual->gl_visual->RGBAflag)) { + /* 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 < _R; r++) { + for (g = 0; g < _G; g++) { + for (b = 0; b < _B; b++) { + XMesaColor xcol; + int exact, alloced; + xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535); + xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535); + xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_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 = _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 / (_R-1); + buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1); + buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1); + } + } + } + + if (colorsfailed && getenv("MESA_DEBUG")) { + fprintf( stderr, + "Note: %d out of %d needed colors do not match exactly.\n", + colorsfailed, _R*_G*_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 (ad@lms.be) + * 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 = (GLint) (255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g ) + 0.5); + v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); + } + + g = 1.0 / v->GreenGamma; + for (i=0; i<256; i++) { + GLint green = (GLint) (255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g ) + 0.5); + v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); + } + + g = 1.0 / v->BlueGamma; + for (i=0; i<256; i++) { + GLint blue = (GLint) (255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g ) + 0.5); + 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 = 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, + XMesaWindow window, XMesaColormap cmap ) +{ + unsigned long rmask, gmask, bmask; + (void) buffer; + (void) window; + (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 = bitcount(rmask); + GLint gBits = bitcount(gmask); + GLint bBits = bitcount(bmask); + GLint minBits; + 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 */ + minBits = rBits; + if (gBits < minBits) minBits = gBits; + if (bBits < minBits) minBits = bBits; + for (i=0;i<16;i++) { + v->Kernel[i] = kernel[i] >> minBits; + } + + v->undithered_pf = PF_TRUECOLOR; + v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : 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 + && sizeof(GLuint)==4 + && 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; + } + else if (GET_REDMASK(v) ==0xff0000 + && GET_GREENMASK(v)==0x00ff00 + && GET_BLUEMASK(v) ==0x0000ff + && CHECK_BYTE_ORDER(v) + && v->BitsPerPixel==32 + && sizeof(GLuint)==4 + && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { + /* common 32 bpp config used on Linux, HP, IBM */ + v->undithered_pf = v->dithered_pf = PF_8R8G8B; + } + else if (GET_REDMASK(v) ==0xff0000 + && GET_GREENMASK(v)==0x00ff00 + && GET_BLUEMASK(v) ==0x0000ff + && CHECK_BYTE_ORDER(v) + && v->BitsPerPixel==24 + && sizeof(GLuint)==4 + && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { + /* common packed 24 bpp config used on Linux */ + v->undithered_pf = v->dithered_pf = PF_8R8G8B24; + } + else if (GET_REDMASK(v) ==0xf800 + && GET_GREENMASK(v)==0x07e0 + && GET_BLUEMASK(v) ==0x001f + && CHECK_BYTE_ORDER(v) + && v->BitsPerPixel==16 + && sizeof(GLushort)==2 + && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { + /* 5-6-5 color weight on common PC VGA boards */ + 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)) { + 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 "made current" for the first time, we can finally + * finish initializing the context's visual and buffer information. + * Input: v - the XMesaVisual to initialize + * b - the XMesaBuffer to initialize (may be NULL) + * rgb_flag - TRUE = RGBA mode, FALSE = color index mode + * window - the window/pixmap we're rendering into + * cmap - the colormap associated with the window/pixmap + * Return: GL_TRUE=success, GL_FALSE=failure + */ +static GLboolean initialize_visual_and_buffer( int client, + XMesaVisual v, + XMesaBuffer b, + GLboolean rgb_flag, + XMesaDrawable window, + XMesaColormap cmap + ) +{ +#ifndef XFree86Server + XGCValues gcvalues; +#endif + + if (b) { + assert(b->xm_visual == v); + } + + /* Save true bits/pixel */ + v->BitsPerPixel = GET_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->index_bits = GET_VISUAL_DEPTH(v); + } + else { + /* RGB WINDOW: + * We support RGB rendering into almost any kind of visual. + */ + int xclass; + xclass = GET_VISUAL_CLASS(v); + if (xclass==TrueColor || xclass==DirectColor) { + setup_truecolor( v, b, (XMesaWindow)window, cmap ); + } + else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { + setup_monochrome( v, b ); + } + else if (xclass==GrayScale || xclass==StaticGray) { + if (!setup_grayscale( client, v, b, cmap )) { + return GL_FALSE; + } + } + else if ((xclass==PseudoColor || xclass==StaticColor) + && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { + if (!setup_dithered_color( client, v, b, cmap )) { + return GL_FALSE; + } + } + else { + error("XMesa: RGB mode rendering not supported in given visual."); + return GL_FALSE; + } + v->index_bits = 0; + + if (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 (getenv("MESA_INFO")) { + fprintf(stderr, "X/Mesa visual = %p\n", v); + fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); + fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); + fprintf(stderr, "X/Mesa level = %d\n", v->level); + fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); + fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); + } + + if (b && window) { + /* Do window-specific initializations */ + + /* Window dimensions */ + unsigned int w, h; + get_drawable_size( v->display, window, &w, &h ); + b->width = w; + b->height = h; + + b->frontbuffer = window; + + assert( v->gl_visual ); + + /* Setup for single/double buffering */ + if (v->gl_visual->DBflag) { + /* Double buffered */ +#ifndef XFree86Server + b->shm = check_for_xshm( v->display ); +#endif + xmesa_alloc_back_buffer( b ); + if (b->db_state==BACK_PIXMAP) { + b->buffer = (XMesaDrawable)b->backpixmap; + } + else { + b->buffer = XIMAGE; + } + } + else { + /* Single Buffered */ + b->buffer = b->frontbuffer; + } + + /* X11 graphics contexts */ +#ifdef XFree86Server + b->gc1 = CreateScratchGC(v->display, window->depth); + b->gc2 = CreateScratchGC(v->display, window->depth); +#else + b->gc1 = XCreateGC( v->display, window, 0, NULL ); + b->gc2 = XCreateGC( v->display, window, 0, NULL ); +#endif + XMesaSetFunction( v->display, b->gc1, GXcopy ); + XMesaSetFunction( v->display, b->gc2, GXcopy ); + + /* + * Don't generate Graphics Expose/NoExpose events in swapbuffers(). + * Patch contributed by Michael Pichler May 15, 1995. + */ +#ifdef XFree86Server + b->cleargc = CreateScratchGC(v->display, window->depth); + { + CARD32 v[1]; + v[0] = FALSE; + dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL); + } +#else + gcvalues.graphics_exposures = False; + b->cleargc = XCreateGC( v->display, window, + GCGraphicsExposures, &gcvalues); +#endif + XMesaSetFunction( v->display, b->cleargc, 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->buffer!=XIMAGE) { + 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() */ +#ifdef XFree86Server + b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, + (char *)MALLOC(MAX_WIDTH*4)); +#else + b->rowimage = XCreateImage( v->display, + v->visinfo->visual, + v->visinfo->depth, + ZPixmap, 0, /*format, offset*/ + (char*) MALLOC(MAX_WIDTH*4), /*data*/ + MAX_WIDTH, 1, /*width, height*/ + 32, /*bitmap_pad*/ + 0 /*bytes_per_line*/ ); +#endif + } + + 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) +{ + 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_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_TRUEDITHER: + /* fall through */ + case PF_DITHER_5R6G5B: + { + unsigned long p; + PACK_TRUEDITHER(p, 1, 0, r, g, b); + return p; + } + default: + gl_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); + } + return 0; +} + + +/**********************************************************************/ +/***** 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_EXT + * Return; a new XMesaVisual or 0 if error. + */ +XMesaVisual XMesaCreateVisual( XMesaDisplay *display, + XMesaVisualInfo visinfo, + GLboolean rgb_flag, + GLboolean alpha_flag, + GLboolean db_flag, + GLboolean stereo_flag, + GLboolean ximage_flag, + GLint depth_size, + GLint stencil_size, + GLint accum_red_size, + GLint accum_green_size, + GLint accum_blue_size, + GLint accum_alpha_size, + GLint num_samples, + GLint level, + GLint visualCaveat ) +{ + char *gamma; + XMesaVisual v; + GLint red_bits, green_bits, blue_bits, alpha_bits; + + /* For debugging only */ + if (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. + */ +#ifdef XFree86Server + /* NOT_NEEDED */ +#else + XSynchronize( display, 1 ); +#endif + } + + v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); + if (!v) { + return NULL; + } + + /* + * In the X server, NULL is passed in for the display. It will have + * to be set before using this visual. See XMesaSetVisualDisplay() + * below. + */ + v->display = display; + + /* Save a copy of the XVisualInfo struct because the user may XFREE() + * the struct but we may need some of the information contained in it + * at a later time. + */ +#ifdef XFree86Server + v->visinfo = visinfo; +#else + v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); + if(!v->visinfo) { + FREE(v); + return NULL; + } + MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); + + /* Save a copy of the pointer now so we can find this visual again + * if we need to search for it in find_glx_visual(). + */ + v->vishandle = visinfo; +#endif + +#ifdef XFree86Server + /* Initialize the depth of the screen */ + { + PixmapFormatRec *format; + + for (format = screenInfo.formats; + format->depth != display->rootDepth; + format++) + ; + v->screen_depth = format->bitsPerPixel; + } +#endif + + /* check for MESA_GAMMA environment variable */ + gamma = getenv("MESA_GAMMA"); + if (gamma) { + v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; + sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); + if (v->RedGamma<=0.0) v->RedGamma = 1.0; + if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; + if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; + } + else { + v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; + } + + v->ximage_flag = ximage_flag; + v->level = level; + v->VisualCaveat = visualCaveat; + + (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); + + { + int xclass; + xclass = GET_VISUAL_CLASS(v); + if (xclass==TrueColor || xclass==DirectColor) { + red_bits = bitcount(GET_REDMASK(v)); + green_bits = bitcount(GET_GREENMASK(v)); + blue_bits = bitcount(GET_BLUEMASK(v)); + alpha_bits = 0; + } + 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) ); + } + } + + if (alpha_flag && alpha_bits == 0) + alpha_bits = 8; + + v->gl_visual = _mesa_create_visual( rgb_flag, db_flag, stereo_flag, + red_bits, green_bits, + blue_bits, alpha_bits, + v->index_bits, + depth_size, + stencil_size, + accum_red_size, accum_green_size, + accum_blue_size, accum_alpha_size, + 0 ); + if (!v->gl_visual) { +#ifndef XFree86Server + FREE(v->visinfo); +#endif + FREE(v); + return NULL; + } + + return v; +} + + +void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) +{ + v->display = dpy; +} + + +void XMesaDestroyVisual( XMesaVisual v ) +{ + _mesa_destroy_visual( v->gl_visual ); +#ifndef XFree86Server + FREE(v->visinfo); +#endif + FREE(v); +} + + + +/* + * Create a new XMesaContext. + * Input: v - XMesaVisual + * share_list - another XMesaContext with which to share display + * lists or NULL if no sharing is wanted. + * Return: an XMesaContext or NULL if error. + */ +XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) +{ + XMesaContext c; + GLboolean direct = GL_TRUE; /* XXXX */ + /* NOT_DONE: should this be GL_FALSE??? */ + static GLboolean firstTime = GL_TRUE; + + if (firstTime) { + _glthread_INIT_MUTEX(_xmesa_lock); + firstTime = GL_FALSE; + } + + c = (XMesaContext) CALLOC_STRUCT(xmesa_context); + if (!c) { + return NULL; + } + + c->gl_ctx = gl_create_context( v->gl_visual, + share_list ? share_list->gl_ctx : (GLcontext *) NULL, + (void *) c, direct ); + if (!c->gl_ctx) { + FREE(c); + return NULL; + } + + gl_extensions_enable(c->gl_ctx, "GL_HP_occlusion_test"); + gl_extensions_enable(c->gl_ctx, "GL_ARB_texture_cube_map"); + gl_extensions_enable(c->gl_ctx, "GL_EXT_texture_env_combine"); + + if (CHECK_BYTE_ORDER(v)) { + c->swapbytes = GL_FALSE; + } + else { + c->swapbytes = 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 */ + + c->gl_ctx->Driver.UpdateState = xmesa_update_state; + +#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) + c->driContextPriv = driContextPriv; +#endif + + /* Run the config file */ + gl_context_initialize( c->gl_ctx ); + + return c; +} + + + + +void XMesaDestroyContext( XMesaContext c ) +{ +#ifdef FX + if (c->xm_buffer && c->xm_buffer->FXctx) + fxMesaDestroyContext(c->xm_buffer->FXctx); +#endif + if (c->gl_ctx) + gl_destroy_context( c->gl_ctx ); + + /* Disassociate old buffer with this context */ + if (c->xm_buffer) + c->xm_buffer->xm_context = NULL; + + /* Destroy any buffers which are using this context. If we don't + * we may have dangling references. Hmm, maybe we should just + * set the buffer's context pointer to NULL instead of deleting it? + * Let's see if we get any bug reports... + * This contributed by Doug Rabson <dfr@calcaphon.com> + */ + { + XMesaBuffer b, next; + for (b = XMesaBufferList; b; b = next) { + next = b->Next; + if (!b->pixmap_flag) { +#ifndef XFree86Server + XSync(b->display, False); +#endif + if (b->xm_context == c) { + /* found a context created for this context */ + XMesaDestroyBuffer( b ); + } + } + } + } + + FREE( c ); +} + + + +/* + * XXX this isn't a public function! It's a hack for the 3Dfx driver. + * Create a new XMesaBuffer from an X window. + * Input: v - the XMesaVisual + * w - the window + * c - the context + * Return: new XMesaBuffer or NULL if error + */ +XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, + XMesaContext c ) +{ +#ifndef XFree86Server + XWindowAttributes attr; +#endif +#ifdef FX + char *fxEnvVar; +#endif + int client = 0; + + XMesaBuffer b = alloc_xmesa_buffer(); + if (!b) { + return NULL; + } + + (void) c; + +#ifdef XFree86Server + client = CLIENT_ID(((XMesaDrawable)w)->id); +#endif + + assert(v); + +#ifdef XFree86Server + if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { +#else + XGetWindowAttributes( v->display, w, &attr ); + + if (GET_VISUAL_DEPTH(v) != attr.depth) { +#endif + if (getenv("MESA_DEBUG")) { + fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); + } + return NULL; + } + + b->xm_context = NULL; /* Associate no context with this buffer */ + + b->xm_visual = v; + b->pixmap_flag = GL_FALSE; + b->display = v->display; +#ifdef XFree86Server + b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); +#else + if (attr.colormap) { + b->cmap = attr.colormap; + } + else { + if (getenv("MESA_DEBUG")) { + fprintf(stderr, "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 */ + b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); + } +#endif + + /* determine back buffer implementation */ + if (v->gl_visual->DBflag) { + if (v->ximage_flag) { + b->db_state = BACK_XIMAGE; + } + else { + b->db_state = BACK_PIXMAP; + } + } + else { + b->db_state = 0; + } + + b->gl_buffer = gl_create_framebuffer( v->gl_visual, + v->gl_visual->DepthBits > 0, + v->gl_visual->StencilBits > 0, + v->gl_visual->AccumRedBits > 0, + v->gl_visual->AlphaBits > 0 ); + if (!b->gl_buffer) { + free_xmesa_buffer(client, b); + return NULL; + } + + if (!initialize_visual_and_buffer( client, v, b, v->gl_visual->RGBAflag, + (XMesaDrawable)w, b->cmap )) { + gl_destroy_framebuffer( b->gl_buffer ); + free_xmesa_buffer(client, b); + return NULL; + } + +#ifdef FX + fxEnvVar = getenv("MESA_GLX_FX"); + if (fxEnvVar) { + if (fxEnvVar[0]!='d') { + int attribs[100]; + int numAttribs = 0; + int hw; + if (v->gl_visual->DepthBits > 0) { + attribs[numAttribs++] = FXMESA_DEPTH_SIZE; + attribs[numAttribs++] = 1; + } + if (v->gl_visual->DBflag) { + attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; + } + if (v->gl_visual->AccumRedBits > 0) { + attribs[numAttribs++] = FXMESA_ACCUM_SIZE; + attribs[numAttribs++] = v->gl_visual->AccumRedBits; + } + if (v->gl_visual->StencilBits > 0) { + attribs[numAttribs++] = FXMESA_STENCIL_SIZE; + attribs[numAttribs++] = v->gl_visual->StencilBits; + } + if (v->gl_visual->AlphaBits > 0) { + attribs[numAttribs++] = FXMESA_ALPHA_SIZE; + attribs[numAttribs++] = 1; + } + if (c->gl_ctx) { +#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ + attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; + attribs[numAttribs++] = (int) c->gl_ctx; + } + attribs[numAttribs++] = FXMESA_NONE; + + if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { + b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); + if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { + b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; + if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') + b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; + else + b->FXwindowHack = GL_FALSE; + } + } + else { + if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') + b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, + GR_REFRESH_75Hz, attribs); + else + b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); + b->FXisHackUsable = GL_FALSE; + b->FXwindowHack = GL_FALSE; + } + /* + fprintf(stderr, + "voodoo %d, wid %d height %d hack: usable %d active %d\n", + hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); + */ + } + } + else { + fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); + fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); + fprintf(stderr," (check the README.3DFX file for more information).\n\n"); + fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); + } +#endif + +#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) + b->driDrawPriv = driDrawPriv; +#endif + + return b; +} + + +XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) +{ + return XMesaCreateWindowBuffer2( v, w, NULL ); +} + + +/* + * Create a new XMesaBuffer from an X pixmap. + * Input: v - the XMesaVisual + * p - the pixmap + * cmap - the colormap, may be 0 if using a TrueColor or DirectColor + * visual for the pixmap + * Return: new XMesaBuffer or NULL if error + */ +XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, + XMesaPixmap p, XMesaColormap cmap ) +{ + int client = 0; + XMesaBuffer b = alloc_xmesa_buffer(); + if (!b) { + return NULL; + } + + +#ifdef XFree86Server + client = CLIENT_ID(((XMesaDrawable)p)->id); +#endif + + assert(v); + + b->xm_context = NULL; /* Associate no context with this buffer */ + + b->xm_visual = v; + b->pixmap_flag = GL_TRUE; + b->display = v->display; + b->cmap = cmap; + + /* determine back buffer implementation */ + if (v->gl_visual->DBflag) { + if (v->ximage_flag) { + b->db_state = BACK_XIMAGE; + } + else { + b->db_state = BACK_PIXMAP; + } + } + else { + b->db_state = 0; + } + + b->gl_buffer = gl_create_framebuffer( v->gl_visual, + v->gl_visual->DepthBits > 0, + v->gl_visual->StencilBits > 0, + v->gl_visual->AccumRedBits + + v->gl_visual->AccumGreenBits + + v->gl_visual->AccumBlueBits > 0, + v->gl_visual->AlphaBits > 0 ); + if (!b->gl_buffer) { + free_xmesa_buffer(client, b); + return NULL; + } + + if (!initialize_visual_and_buffer(client, v, b, v->gl_visual->RGBAflag, + (XMesaDrawable)p, cmap)) { + gl_destroy_framebuffer( b->gl_buffer ); + free_xmesa_buffer(client, b); + return NULL; + } + +#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) + b->driDrawPriv = driDrawPriv; +#endif + + return b; +} + + + +/* + * Deallocate an XMesaBuffer structure and all related info. + */ +void XMesaDestroyBuffer( XMesaBuffer b ) +{ + int client = 0; + +#ifdef XFree86Server + if (b->frontbuffer) + client = CLIENT_ID(b->frontbuffer->id); +#endif + + if (b->gc1) XMesaFreeGC( b->xm_visual->display, b->gc1 ); + if (b->gc2) XMesaFreeGC( b->xm_visual->display, b->gc2 ); + if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); + + if (b->backimage) { +#if defined(USE_XSHM) && !defined(XFree86Server) + if (b->shm) { + XShmDetach( b->xm_visual->display, &b->shminfo ); + XDestroyImage( b->backimage ); + shmdt( b->shminfo.shmaddr ); + } + else +#endif + XMesaDestroyImage( b->backimage ); + } + if (b->backpixmap) { + XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); + if (b->xm_visual->hpcr_clear_flag) { + XMesaFreePixmap( b->xm_visual->display, + b->xm_visual->hpcr_clear_pixmap ); + XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); + } + } + if (b->rowimage) { + FREE( b->rowimage->data ); + b->rowimage->data = NULL; + XMesaDestroyImage( b->rowimage ); + } + + if (b->xm_context) + b->xm_context->xm_buffer = NULL; + + gl_destroy_framebuffer( b->gl_buffer ); + free_xmesa_buffer(client, b); +} + + + +/* + * 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. + */ +GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, + XMesaBuffer readBuffer ) +{ + if (c) { + if (!drawBuffer || !readBuffer) + return GL_FALSE; /* must specify buffers! */ + +#ifdef FX + if (drawBuffer->FXctx) { + fxMesaMakeCurrent(drawBuffer->FXctx); + + /* Disassociate old buffer from this context */ + if (c->xm_buffer) + c->xm_buffer->xm_context = NULL; + + /* Associate the context with this buffer */ + drawBuffer->xm_context = c; + + c->xm_buffer = drawBuffer; + c->xm_read_buffer = readBuffer; + c->use_read_buffer = (drawBuffer != readBuffer); + + return GL_TRUE; + } +#endif + if (c->gl_ctx == gl_get_current_context() + && c->xm_buffer == drawBuffer + && c->xm_read_buffer == readBuffer + && c->xm_buffer->wasCurrent) { + /* same context and buffer, do nothing */ + return GL_TRUE; + } + + /* Disassociate old buffer with this context */ + if (c->xm_buffer) + c->xm_buffer->xm_context = NULL; + drawBuffer->xm_context = c; /* Associate the context with this buffer */ + + c->xm_buffer = drawBuffer; + c->xm_read_buffer = readBuffer; + c->use_read_buffer = (drawBuffer != readBuffer); + + gl_make_current2(c->gl_ctx, drawBuffer->gl_buffer, readBuffer->gl_buffer); + + if (c->gl_ctx->Viewport.Width == 0) { + /* initialize viewport to window size */ + _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); + c->gl_ctx->Scissor.Width = drawBuffer->width; + c->gl_ctx->Scissor.Height = drawBuffer->height; + } + + if (c->xm_visual->gl_visual->RGBAflag) { + /* + * Must recompute and set these pixel values because colormap + * can be different for different windows. + */ + c->pixel = xmesa_color_to_pixel( c, c->red, c->green, + c->blue, c->alpha, c->pixelformat ); + XMesaSetForeground( c->display, c->xm_buffer->gc1, c->pixel ); + 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, c->xm_buffer->cleargc, c->clearpixel); + } + + /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ + c->xm_buffer->wasCurrent = GL_TRUE; + } + else { + /* Detach */ + gl_make_current2( 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 = (XMesaContext) ctx->DriverCtx; + return xmesa; + } + else { + return 0; + } +} + + +XMesaBuffer XMesaGetCurrentBuffer( void ) +{ + GET_CURRENT_CONTEXT(ctx); + if (ctx) { + XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; + return xmesa->xm_buffer; + } + else { + return 0; + } +} + + +/* New in Mesa 3.1 */ +XMesaBuffer XMesaGetCurrentReadBuffer( void ) +{ + GET_CURRENT_CONTEXT(ctx); + if (ctx) { + XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; + return xmesa->xm_buffer; + } + else { + return 0; + } +} + + +GLboolean XMesaForceCurrent(XMesaContext c) +{ + if (c) { + if (c->gl_ctx != gl_get_current_context()) { + gl_make_current(c->gl_ctx, c->xm_buffer->gl_buffer); + } + } + else { + gl_make_current(NULL, NULL); + } + return GL_TRUE; +} + + +GLboolean XMesaLoseCurrent(XMesaContext c) +{ + (void) c; + gl_make_current(NULL, NULL); + return GL_TRUE; +} + + +/* + * Switch 3Dfx support hack between window and full-screen mode. + */ +GLboolean XMesaSetFXmode( GLint mode ) +{ +#ifdef FX + const char *fx = getenv("MESA_GLX_FX"); + if (fx && fx[0] != 'd') { + GET_CURRENT_CONTEXT(ctx); + GrHwConfiguration hw; + if (!FX_grSstQueryHardware(&hw)) { + /*fprintf(stderr, "!grSstQueryHardware\n");*/ + return GL_FALSE; + } + if (hw.num_sst < 1) { + /*fprintf(stderr, "hw.num_sst < 1\n");*/ + return GL_FALSE; + } + if (ctx) { + XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; + if (mode == XMESA_FX_WINDOW) { + if (xmesa->xm_buffer->FXisHackUsable) { + FX_grSstControl(GR_CONTROL_DEACTIVATE); + xmesa->xm_buffer->FXwindowHack = GL_TRUE; + return GL_TRUE; + } + } + else if (mode == XMESA_FX_FULLSCREEN) { + FX_grSstControl(GR_CONTROL_ACTIVATE); + xmesa->xm_buffer->FXwindowHack = GL_FALSE; + return GL_TRUE; + } + else { + /* Error: Bad mode value */ + } + } + } + /*fprintf(stderr, "fallthrough\n");*/ +#else + (void) mode; +#endif + return GL_FALSE; +} + + + +#ifdef FX +/* + * Read image from VooDoo frame buffer into X/Mesa's back XImage. + */ +static void FXgetImage( XMesaBuffer b ) +{ + static unsigned short pixbuf[MAX_WIDTH]; + int x, y; + XMesaWindow root; + unsigned int bw, depth, width, height; + XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; + + assert(xmesa->xm_buffer->FXctx); + +#ifdef XFree86Server + x = b->frontbuffer->x; + y = b->frontbuffer->y; + width = b->frontbuffer->width; + height = b->frontbuffer->height; + depth = b->frontbuffer->depth; +#else + XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, + &root, &x, &y, &width, &height, &bw, &depth); +#endif + if (b->width != width || b->height != height) { + b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); + b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); + if (b->width & 1) + b->width--; /* prevent odd width */ + xmesa_alloc_back_buffer( b ); + } + + grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); + if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { + /* Special case: 16bpp RGB */ + grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ + 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ + b->width, b->height, /* size */ + b->width * sizeof(GLushort), /* stride */ + b->backimage->data); /* dest buffer */ + } + else if (xmesa->xm_visual->dithered_pf==PF_DITHER + && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { + /* Special case: 8bpp RGB */ + for (y=0;y<b->height;y++) { + GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data + + xmesa->xm_buffer->backimage->bytes_per_line * y; + XDITHER_SETUP(y); + + /* read row from 3Dfx frame buffer */ + grLfbReadRegion( GR_BUFFER_FRONTBUFFER, + 0, xmesa->xm_buffer->FXctx->height-(b->height-y), + b->width, 1, + 0, + pixbuf ); + + /* write to XImage back buffer */ + for (x=0;x<b->width;x++) { + GLubyte r = (pixbuf[x] & 0xf800) >> 8; + GLubyte g = (pixbuf[x] & 0x07e0) >> 3; + GLubyte b = (pixbuf[x] & 0x001f) << 3; + *ptr++ = XDITHER( x, r, g, b); + } + } + } + else { + /* General case: slow! */ + for (y=0;y<b->height;y++) { + /* read row from 3Dfx frame buffer */ + grLfbReadRegion( GR_BUFFER_FRONTBUFFER, + 0, xmesa->xm_buffer->FXctx->height-(b->height-y), + b->width, 1, + 0, + pixbuf ); + + /* write to XImage back buffer */ + for (x=0;x<b->width;x++) { + XMesaPutPixel(b->backimage,x,y, + xmesa_color_to_pixel(xmesa, + (pixbuf[x] & 0xf800) >> 8, + (pixbuf[x] & 0x07e0) >> 3, + (pixbuf[x] & 0x001f) << 3, + 0xff, xmesa->pixelformat)); + } + } + } + grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); +} +#endif + + +/* + * Copy the back buffer to the front buffer. If there's no back buffer + * this is a no-op. + */ +void XMesaSwapBuffers( XMesaBuffer b ) +{ + 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 (b->xm_context && b->xm_context->gl_ctx == ctx) + _mesa_swapbuffers(ctx); + + if (b->db_state) { +#ifdef FX + if (b->FXctx) { + fxMesaSwapBuffers(); + + if (b->FXwindowHack) + FXgetImage(b); + else + return; + } +#endif + if (b->backimage) { + /* Copy Ximage from host's memory to server's window */ +#if defined(USE_XSHM) && !defined(XFree86Server) + if (b->shm) { + /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ + XShmPutImage( b->xm_visual->display, b->frontbuffer, + b->cleargc, + b->backimage, 0, 0, + 0, 0, b->width, b->height, False ); + /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ + } + else +#endif + { +#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) + XMesaDriSwapBuffers( b ); +#else + /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ + XMesaPutImage( b->xm_visual->display, b->frontbuffer, + b->cleargc, + b->backimage, 0, 0, + 0, 0, b->width, b->height ); + /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ +#endif + } + } + else { + /* Copy pixmap to window on server */ + /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ + XMesaCopyArea( b->xm_visual->display, + b->backpixmap, /* source drawable */ + b->frontbuffer, /* dest. drawable */ + b->cleargc, + 0, 0, b->width, b->height, /* source region */ + 0, 0 /* dest region */ + ); + /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ + } + } +#if !defined(GLX_DIRECT_RENDERING) && !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 (b->xm_context->gl_ctx == ctx) + _mesa_swapbuffers(ctx); + + if (b->db_state) { + int yTop = b->bottom - y - height; +#ifdef FX + if (b->FXctx) { + fxMesaSwapBuffers(); + if (b->FXwindowHack) + FXgetImage(b); + else + return; + } +#endif + if (b->backimage) { + /* 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->frontbuffer, + b->cleargc, + b->backimage, 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->frontbuffer, + b->cleargc, + b->backimage, x, yTop, + x, yTop, width, height ); + } + } + else { + /* Copy pixmap to window on server */ + XMesaCopyArea( b->xm_visual->display, + b->backpixmap, /* source drawable */ + b->frontbuffer, /* dest. drawable */ + b->cleargc, + x, yTop, width, height, /* source region */ + x, yTop /* dest region */ + ); + } + } +} + + +/* + * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function + * is a way to get "under the hood" of X/Mesa so one can manipulate the + * back buffer directly. + * Output: pixmap - pointer to back buffer's Pixmap, or 0 + * ximage - pointer to back buffer's XImage, or NULL + * Return: GL_TRUE = context is double buffered + * GL_FALSE = context is single buffered + */ +GLboolean XMesaGetBackBuffer( XMesaBuffer b, + XMesaPixmap *pixmap, + XMesaImage **ximage ) +{ + if (b->db_state) { + if (pixmap) *pixmap = b->backpixmap; + if (ximage) *ximage = b->backimage; + return GL_TRUE; + } + else { + *pixmap = 0; + *ximage = NULL; + return GL_FALSE; + } +} + + +/* + * Return the depth buffer associated with an XMesaBuffer. + * Input: b - the XMesa buffer handle + * Output: width, height - size of buffer in pixels + * bytesPerValue - bytes per depth value (2 or 4) + * buffer - pointer to depth buffer values + * Return: GL_TRUE or GL_FALSE to indicate success or failure. + */ +GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, + GLint *bytesPerValue, void **buffer ) +{ + if ((!b->gl_buffer) || (!b->gl_buffer->DepthBuffer)) { + *width = 0; + *height = 0; + *bytesPerValue = 0; + *buffer = 0; + return GL_FALSE; + } + else { + *width = b->gl_buffer->Width; + *height = b->gl_buffer->Height; + *bytesPerValue = sizeof(GLdepth); + *buffer = b->gl_buffer->DepthBuffer; + 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 "3.1"; + } + 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->frontbuffer==d && b->display==dpy) { + return b; + } + } + return NULL; +} + + + +/* + * 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->pixmap_flag) { +#ifdef XFree86Server + /* NOT_NEEDED */ +#else + XSync(b->display, False); + if (!window_exists( b->display, b->frontbuffer )) { + /* found a dead window, free the ancillary info */ + XMesaDestroyBuffer( b ); + } +#endif + } + } +} + + +void XMesaReset( void ) +{ + while (XMesaBufferList) + XMesaDestroyBuffer(XMesaBufferList); + + XMesaBufferList = NULL; +} + + +unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, + GLfloat red, GLfloat green, + GLfloat blue, GLfloat alpha ) +{ + GLint r = (GLint) (red * 255.0F); + GLint g = (GLint) (green * 255.0F); + GLint b = (GLint) (blue * 255.0F); + GLint a = (GLint) (alpha * 255.0F); + + switch (xmesa->pixelformat) { + case PF_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_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_TRUEDITHER: + { + unsigned long p; + PACK_TRUEDITHER(p, x, y, r, g, b); + return p; + } + default: + gl_problem(NULL, "Bad pixel format in XMesaDitherColor"); + } + return 0; +} + + |