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* Mesa 3-D graphics library
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* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "GL/fxmesa.h"
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extern _glthread_Mutex _xmesa_lock;
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extern XMesaBuffer XMesaBufferList;
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/* for PF_8R8G8B24 pixel format */
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struct xmesa_renderbuffer;
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/* Function pointer for clearing color buffers */
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typedef void (*ClearFunc)( GLcontext *ctx, struct xmesa_renderbuffer *xrb,
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GLint x, GLint y, GLint width, GLint height );
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/** Framebuffer pixel formats */
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PF_Index, /**< Color Index mode */
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PF_Truecolor, /**< TrueColor or DirectColor, any depth */
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PF_Dither_True, /**< TrueColor with dithering */
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PF_8A8R8G8B, /**< 32-bit TrueColor: 8-A, 8-R, 8-G, 8-B bits */
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PF_8A8B8G8R, /**< 32-bit TrueColor: 8-A, 8-B, 8-G, 8-R bits */
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PF_8R8G8B, /**< 32-bit TrueColor: 8-R, 8-G, 8-B bits */
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PF_8R8G8B24, /**< 24-bit TrueColor: 8-R, 8-G, 8-B bits */
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PF_5R6G5B, /**< 16-bit TrueColor: 5-R, 6-G, 5-B bits */
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PF_Dither, /**< Color-mapped RGB with dither */
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PF_Lookup, /**< Color-mapped RGB without dither */
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PF_HPCR, /**< HP Color Recovery (ad@lms.be 30/08/95) */
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PF_1Bit, /**< monochrome dithering of RGB */
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PF_Grayscale, /**< Grayscale or StaticGray */
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PF_Dither_5R6G5B /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
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* Visual inforation, derived from GLvisual.
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* Basically corresponds to an XVisualInfo.
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GLvisual mesa_visual; /* Device independent visual parameters */
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XMesaDisplay *display; /* The X11 display */
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GLint ColormapEntries;
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XMesaVisualInfo visinfo; /* X's visual info (pointer to private copy) */
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XVisualInfo *vishandle; /* Only used in fakeglx.c */
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GLint BitsPerPixel; /* True bits per pixel for XImages */
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GLboolean ximage_flag; /* Use XImage for back buffer (not pixmap)? */
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enum pixel_format dithered_pf; /* Pixel format when dithering */
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enum pixel_format undithered_pf;/* Pixel format when not dithering */
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GLfloat RedGamma; /* Gamma values, 1.0 is default */
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/* For PF_TRUECOLOR */
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GLint rshift, gshift, bshift;/* Pixel color component shifts */
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GLubyte Kernel[16]; /* Dither kernel */
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unsigned long RtoPixel[512]; /* RGB to pixel conversion */
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unsigned long GtoPixel[512];
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unsigned long BtoPixel[512];
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GLubyte PixelToR[256]; /* Pixel to RGB conversion */
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GLubyte PixelToG[256];
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GLubyte PixelToB[256];
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short hpcr_rgbTbl[3][256];
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GLboolean hpcr_clear_flag;
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GLubyte hpcr_clear_ximage_pattern[2][16];
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XMesaImage *hpcr_clear_ximage;
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XMesaPixmap hpcr_clear_pixmap;
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* Context info, dDerived from GLcontext.
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* Basically corresponds to a GLXContext.
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struct xmesa_context {
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GLcontext mesa; /* the core library context (containment) */
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XMesaVisual xm_visual; /* Describes the buffers */
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XMesaBuffer xm_buffer; /* current span/point/line/triangle buffer */
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XMesaDisplay *display; /* == xm_visual->display */
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GLboolean swapbytes; /* Host byte order != display byte order? */
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GLboolean direct; /* Direct rendering context? */
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enum pixel_format pixelformat;
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GLubyte clearcolor[4]; /* current clearing color */
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unsigned long clearpixel; /* current clearing pixel value */
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* Types of X/GLX drawables we might render into.
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WINDOW, /* An X window */
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GLXWINDOW, /* GLX window */
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PIXMAP, /* GLX pixmap */
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PBUFFER /* GLX Pbuffer */
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/** Values for db_mode: */
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#define BACK_PIXMAP 1
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#define BACK_XIMAGE 2
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* An xmesa_renderbuffer represents the back or front color buffer.
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* For the front color buffer:
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* <drawable> is the X window
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* For the back color buffer:
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* Either <ximage> or <pixmap> will be used, never both.
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* In any case, <drawable> always equals <pixmap>.
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* For stand-alone Mesa, we could merge <drawable> and <pixmap> into one
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* field. We don't do that for the server-side GLcore module because
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* pixmaps and drawables are different and we'd need a bunch of casts.
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struct xmesa_renderbuffer
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struct gl_renderbuffer Base; /* Base class */
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XMesaBuffer Parent; /**< The XMesaBuffer this renderbuffer belongs to */
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XMesaDrawable drawable; /* Usually the X window ID */
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XMesaPixmap pixmap; /* Back color buffer */
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XMesaImage *ximage; /* The back buffer, if not using a Pixmap */
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GLubyte *origin1; /* used for PIXEL_ADDR1 macro */
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GLushort *origin2; /* used for PIXEL_ADDR2 macro */
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GLubyte *origin3; /* used for PIXEL_ADDR3 macro */
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GLuint *origin4; /* used for PIXEL_ADDR4 macro */
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GLint bottom; /* used for FLIP macro, equals height - 1 */
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* Framebuffer information, derived from.
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* Basically corresponds to a GLXDrawable.
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struct xmesa_buffer {
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GLframebuffer mesa_buffer; /* depth, stencil, accum, etc buffers */
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/* This MUST BE FIRST! */
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GLboolean wasCurrent; /* was ever the current buffer? */
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XMesaVisual xm_visual; /* the X/Mesa visual */
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XMesaDisplay *display;
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BufferType type; /* window, pixmap, pbuffer or glxwindow */
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struct xmesa_renderbuffer *frontxrb; /* front color renderbuffer */
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struct xmesa_renderbuffer *backxrb; /* back color renderbuffer */
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XMesaColormap cmap; /* the X colormap */
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unsigned long selectedEvents;/* for pbuffers only */
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GLint db_mode; /* 0 = single buffered */
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/* BACK_PIXMAP = use Pixmap for back buffer */
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/* BACK_XIMAGE = use XImage for back buffer */
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GLuint shm; /* X Shared Memory extension status: */
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/* 0 = not available */
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/* 1 = XImage support available */
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/* 2 = Pixmap support available too */
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#if defined(USE_XSHM) && !defined(XFree86Server)
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XShmSegmentInfo shminfo;
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XMesaImage *rowimage; /* Used for optimized span writing */
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XMesaPixmap stipple_pixmap; /* For polygon stippling */
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XMesaGC stipple_gc; /* For polygon stippling */
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XMesaGC gc; /* scratch GC for span, line, tri drawing */
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XMesaGC cleargc; /* GC for clearing the color buffer */
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XMesaGC swapgc; /* GC for swapping the color buffers */
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/* The following are here instead of in the XMesaVisual
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* because they depend on the window's colormap.
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/* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
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unsigned long color_table[576]; /* RGB -> pixel value */
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/* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
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GLubyte pixel_to_r[65536]; /* pixel value -> red */
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GLubyte pixel_to_g[65536]; /* pixel value -> green */
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GLubyte pixel_to_b[65536]; /* pixel value -> blue */
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/* Used to do XAllocColor/XFreeColors accounting: */
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#if defined(XFree86Server)
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Pixel alloced_colors[256];
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unsigned long alloced_colors[256];
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/* For 3Dfx Glide only */
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GLboolean FXisHackUsable; /* Can we render into window? */
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GLboolean FXwindowHack; /* Are we rendering into a window? */
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struct xmesa_buffer *Next; /* Linked list pointer: */
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* If pixelformat==PF_TRUECOLOR:
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#define PACK_TRUECOLOR( PIXEL, R, G, B ) \
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PIXEL = xmesa->xm_visual->RtoPixel[R] \
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| xmesa->xm_visual->GtoPixel[G] \
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| xmesa->xm_visual->BtoPixel[B]; \
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* If pixelformat==PF_TRUEDITHER:
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#define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B ) \
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int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)]; \
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PIXEL = xmesa->xm_visual->RtoPixel[(R)+d] \
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| xmesa->xm_visual->GtoPixel[(G)+d] \
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| xmesa->xm_visual->BtoPixel[(B)+d]; \
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* If pixelformat==PF_8A8B8G8R:
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#define PACK_8A8B8G8R( R, G, B, A ) \
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( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
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* Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable
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#define PACK_8B8G8R( R, G, B ) ( ((B) << 16) | ((G) << 8) | (R) )
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* If pixelformat==PF_8R8G8B:
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#define PACK_8R8G8B( R, G, B) ( ((R) << 16) | ((G) << 8) | (B) )
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* If pixelformat==PF_5R6G5B:
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#define PACK_5R6G5B( R, G, B) ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
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* If pixelformat==PF_8A8R8G8B:
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#define PACK_8A8R8G8B( R, G, B, A ) \
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( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
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* If pixelformat==PF_DITHER:
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* Improved 8-bit RGB dithering code contributed by Bob Mercier
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* (mercier@hollywood.cinenet.net). Thanks Bob!
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# define DITH_MIX(r,g,b) (((r) * DITH_G + (g)) * DITH_B + (b))
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# define DITH_MIX(r,g,b) (((g) << 6) | ((b) << 3) | (r))
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#define DITH_N (DITH_DX * DITH_DY)
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#define _dither(C, c, d) (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12)
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extern const int xmesa_kernel8[DITH_DY * DITH_DX];
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/* Dither for random X,Y */
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#define DITHER_SETUP \
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unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;
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#define DITHER( X, Y, R, G, B ) \
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(__d = xmesa_kernel8[(((Y)&3)<<2) | ((X)&3)], \
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ctable[DITH_MIX(_dither(DITH_R, (R), __d), \
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_dither(DITH_G, (G), __d), \
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_dither(DITH_B, (B), __d))])
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/* Dither for random X, fixed Y */
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#define XDITHER_SETUP(Y) \
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unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \
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const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ];
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#define XDITHER( X, R, G, B ) \
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(__d = kernel[(X)&3], \
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ctable[DITH_MIX(_dither(DITH_R, (R), __d), \
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_dither(DITH_G, (G), __d), \
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_dither(DITH_B, (B), __d))])
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* Dithering for flat-shaded triangles. Precompute all 16 possible
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* pixel values given the triangle's RGB color. Contributed by Martin Shenk.
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#define FLAT_DITHER_SETUP( R, G, B ) \
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GLushort ditherValues[16]; \
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unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \
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int msdr = (DITH_N*((DITH_R)-1)+1) * (R); \
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int msdg = (DITH_N*((DITH_G)-1)+1) * (G); \
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int msdb = (DITH_N*((DITH_B)-1)+1) * (B); \
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for (i=0;i<16;i++) { \
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int k = xmesa_kernel8[i]; \
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int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\
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ditherValues[i] = (GLushort) ctable[j]; \
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#define FLAT_DITHER_ROW_SETUP(Y) \
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GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2);
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#define FLAT_DITHER(X) ditherRow[(X)&3]
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* If pixelformat==PF_LOOKUP:
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#define _dither_lookup(C, c) (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
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#define LOOKUP_SETUP \
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unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table
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#define LOOKUP( R, G, B ) \
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ctable[DITH_MIX(_dither_lookup(DITH_R, (R)), \
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_dither_lookup(DITH_G, (G)), \
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_dither_lookup(DITH_B, (B)))]
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* If pixelformat==PF_HPCR:
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* HP Color Recovery dithering (ad@lms.be 30/08/95)
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* HP has on it's 8-bit 700-series computers, a feature called
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* 'Color Recovery'. This allows near 24-bit output (so they say).
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* It is enabled by selecting the 8-bit TrueColor visual AND
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* corresponding colormap (see tkInitWindow) AND doing some special
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extern const short xmesa_HPCR_DRGB[3][2][16];
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#define DITHER_HPCR( X, Y, R, G, B ) \
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( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0) \
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|(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
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| ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6) \
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* If pixelformat==PF_1BIT:
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extern const int xmesa_kernel1[16];
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#define SETUP_1BIT int bitFlip = xmesa->xm_visual->bitFlip
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#define DITHER_1BIT( X, Y, R, G, B ) \
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(( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
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* If pixelformat==PF_GRAYSCALE:
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#define GRAY_RGB( R, G, B ) XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
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* Converts a GL window Y coord to an X window Y coord:
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#define YFLIP(XRB, Y) ((XRB)->bottom - (Y))
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* Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
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* X==0 is left, Y==0 is bottom.
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#define PIXEL_ADDR1(XRB, X, Y) \
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( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) )
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#define PIXEL_ADDR2(XRB, X, Y) \
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( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
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#define PIXEL_ADDR3(XRB, X, Y) \
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( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
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#define PIXEL_ADDR4(XRB, X, Y) \
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( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
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* External functions:
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extern struct xmesa_renderbuffer *
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xmesa_new_renderbuffer(GLcontext *ctx, GLuint name, const GLvisual *visual,
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GLboolean backBuffer);
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xmesa_delete_framebuffer(struct gl_framebuffer *fb);
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xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis);
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xmesa_color_to_pixel( GLcontext *ctx,
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GLubyte r, GLubyte g, GLubyte b, GLubyte a,
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GLuint pixelFormat );
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xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
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GLuint *width, GLuint *height);
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xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer);
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xmesa_init_driver_functions( XMesaVisual xmvisual,
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struct dd_function_table *driver );
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xmesa_update_state( GLcontext *ctx, GLbitfield new_state );
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xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer *xrb,
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enum pixel_format pixelformat, GLint depth);
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xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
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* Using a function instead of an ordinary cast is safer.
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static INLINE struct xmesa_renderbuffer *
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xmesa_renderbuffer(struct gl_renderbuffer *rb)
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return (struct xmesa_renderbuffer *) rb;
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* Return pointer to XMesaContext corresponding to a Mesa GLcontext.
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* Since we're using structure containment, it's just a cast!.
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* XXX should use inlined function for better type safety.
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static INLINE XMesaContext
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XMESA_CONTEXT(GLcontext *ctx)
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return (XMesaContext) ctx;
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* Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
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* Since we're using structure containment, it's just a cast!.
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* XXX should use inlined function for better type safety.
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static INLINE XMesaBuffer
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XMESA_BUFFER(GLframebuffer *b)
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return (XMesaBuffer) b;
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/* Plugged into the software rasterizer. Try to use internal
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* swrast-style point, line and triangle functions.
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extern void xmesa_choose_point( GLcontext *ctx );
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extern void xmesa_choose_line( GLcontext *ctx );
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extern void xmesa_choose_triangle( GLcontext *ctx );
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extern void xmesa_register_swrast_functions( GLcontext *ctx );
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#define ENABLE_EXT_texure_compression_s3tc 0 /* SW texture compression */
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#define ENABLE_EXT_timer_query 0
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#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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#define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
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#define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */
added
removed
src/mesa/drivers/x11/xmesaP.h
