/* * 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. */ #ifndef XMESAP_H #define XMESAP_H #ifdef XFree86Server # include "GL/xf86glx.h" # include "xf86glx_util.h" #else # ifdef GLX_DIRECT_RENDERING # include "dri_mesa.h" # endif # ifdef USE_XSHM # include # endif #endif #include "GL/xmesa.h" #include "types.h" #if defined(FX) && !defined(GLX_DIRECT_RENDERING) #include "GL/fxmesa.h" #include "../FX/fxdrv.h" #endif #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) # include "xdriP.h" #else # define DRI_DRAWABLE_ARG # define DRI_DRAWABLE_PARM # define DRI_CTX_ARG #endif extern _glthread_Mutex _xmesa_lock; /* for PF_8R8G8B24 pixel format */ typedef struct { GLubyte b; GLubyte g; GLubyte r; } bgr_t; /* Function pointer for clearing color buffers */ typedef void (*clear_func)( GLcontext *ctx, GLboolean all, GLint x, GLint y, GLint width, GLint height ); /* * "Derived" from gl_visual. Basically corresponds to an XVisualInfo. */ struct xmesa_visual { GLvisual *gl_visual; /* Device independent visual parameters */ XMesaDisplay *display; /* The X11 display */ #ifdef XFree86Server GLint screen_depth; /* The depth of the screen */ #else XVisualInfo *vishandle; /* The pointer returned by glXChooseVisual */ #endif XMesaVisualInfo visinfo; /* X's visual info */ GLint BitsPerPixel; /* True bits per pixel for XImages */ GLint level; /* 0=normal, 1=overlay, etc */ GLint VisualCaveat; /* for GLX_EXT_visual_rating extension */ GLboolean ximage_flag; /* Use XImage for back buffer (not pixmap)? */ GLuint dithered_pf; /* Pixel format when dithering */ GLuint undithered_pf; /* Pixel format when not dithering */ GLfloat RedGamma; /* Gamma values, 1.0 is default */ GLfloat GreenGamma; GLfloat BlueGamma; GLint rmult, gmult, bmult; /* Range of color values */ GLint index_bits; /* Bits per pixel in CI mode */ /* For PF_TRUECOLOR */ GLint rshift, gshift, bshift;/* Pixel color component shifts */ GLubyte Kernel[16]; /* Dither kernel */ unsigned long RtoPixel[512]; /* RGB to pixel conversion */ unsigned long GtoPixel[512]; unsigned long BtoPixel[512]; GLubyte PixelToR[256]; /* Pixel to RGB conversion */ GLubyte PixelToG[256]; GLubyte PixelToB[256]; /* For PF_HPCR */ short hpcr_rgbTbl[3][256]; GLboolean hpcr_clear_flag; GLubyte hpcr_clear_ximage_pattern[2][16]; XMesaImage *hpcr_clear_ximage; XMesaPixmap hpcr_clear_pixmap; /* For PF_1BIT */ int bitFlip; }; /* * "Derived" from gl_context. Basically corresponds to a GLXContext. */ struct xmesa_context { GLcontext *gl_ctx; /* the core library context */ XMesaVisual xm_visual; /* Describes the buffers */ XMesaBuffer xm_buffer; /* current draw framebuffer */ XMesaBuffer xm_read_buffer; /* current read framebuffer */ GLboolean use_read_buffer; /* read from the xm_read_buffer/ */ XMesaDisplay *display; /* == xm_visual->display */ GLboolean swapbytes; /* Host byte order != display byte order? */ GLboolean direct; /* Direct rendering context? */ GLuint pixelformat; /* Current pixel format */ GLubyte red, green, blue, alpha; /* current drawing color */ unsigned long pixel; /* current drawing pixel value */ GLubyte clearcolor[4]; /* current clearing color */ unsigned long clearpixel; /* current clearing pixel value */ #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) __DRIcontextPrivate *driContextPriv; /* back pointer to DRI context * used for locking */ void *private; /* device-specific private context */ #endif }; /* * "Derived" from gl_buffer. Basically corresponds to a GLXDrawable. */ struct xmesa_buffer { GLboolean wasCurrent; /* was ever the current buffer? */ GLframebuffer *gl_buffer; /* depth, stencil, accum, etc buffers */ XMesaVisual xm_visual; /* the X/Mesa visual */ XMesaContext xm_context; /* the context associated with this buffer */ XMesaDisplay *display; GLboolean pixmap_flag; /* is the buffer a Pixmap? */ XMesaDrawable frontbuffer; /* either a window or pixmap */ XMesaPixmap backpixmap; /* back buffer Pixmap */ XMesaImage *backimage; /* back buffer simulated XImage */ XMesaDrawable buffer; /* the current buffer, either equal to */ /* frontbuffer, backpixmap or XIMAGE (None) */ XMesaColormap cmap; /* the X colormap */ GLint db_state; /* 0 = single buffered */ /* BACK_PIXMAP = use Pixmap for back buffer */ /* BACK_XIMAGE = use XImage for back buffer */ #ifndef XFree86Server GLuint shm; /* X Shared Memory extension status: */ /* 0 = not available */ /* 1 = XImage support available */ /* 2 = Pixmap support available too */ #ifdef USE_XSHM XShmSegmentInfo shminfo; #endif #endif XMesaImage *rowimage; /* Used for optimized span writing */ GLuint width, height; /* size of buffer */ GLint bottom; /* used for FLIP macro below */ GLubyte *ximage_origin1; /* used for PIXELADDR1 macro */ GLint ximage_width1; GLushort *ximage_origin2; /* used for PIXELADDR2 macro */ GLint ximage_width2; GLubyte *ximage_origin3; /* used for PIXELADDR3 macro */ GLint ximage_width3; GLuint *ximage_origin4; /* used for PIXELADDR4 macro */ GLint ximage_width4; XMesaPixmap stipple_pixmap; /* For polygon stippling */ XMesaGC stipple_gc; /* For polygon stippling */ XMesaGC gc1; /* GC for infrequent color changes */ XMesaGC gc2; /* GC for frequent color changes */ XMesaGC cleargc; /* GC for clearing the color buffer */ /* The following are here instead of in the XMesaVisual * because they depend on the window's colormap. */ /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */ unsigned long color_table[576]; /* RGB -> pixel value */ /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */ GLubyte pixel_to_r[65536]; /* pixel value -> red */ GLubyte pixel_to_g[65536]; /* pixel value -> green */ GLubyte pixel_to_b[65536]; /* pixel value -> blue */ /* Used to do XAllocColor/XFreeColors accounting: */ int num_alloced; #if defined(XFree86Server) Pixel alloced_colors[256]; #else unsigned long alloced_colors[256]; #endif #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) __DRIdrawablePrivate *driDrawPriv; /* back pointer to DRI drawable * used for direct access to framebuffer */ void *private; /* device-specific private drawable */ #endif #if defined( FX ) && !defined(GLX_DIRECT_RENDERING) /* For 3Dfx Glide only */ GLboolean FXisHackUsable; /* Can we render into window? */ GLboolean FXwindowHack; /* Are we rendering into a window? */ fxMesaContext FXctx; #endif /* functions for clearing the front and back color buffers */ clear_func front_clear_func; clear_func back_clear_func; struct xmesa_buffer *Next; /* Linked list pointer: */ }; /* Values for xmesa->dest: */ #define FRONT_PIXMAP 1 #define BACK_PIXMAP 2 #define BACK_XIMAGE 4 /* Values for xmesa->pixelformat: */ #define PF_INDEX 1 /* Color Index mode */ #define PF_TRUECOLOR 2 /* TrueColor or DirectColor, any depth */ #define PF_TRUEDITHER 3 /* TrueColor with dithering */ #define PF_8A8B8G8R 4 /* 32-bit TrueColor: 8-A, 8-B, 8-G, 8-R */ #define PF_8R8G8B 5 /* 32-bit TrueColor: 8-R, 8-G, 8-B bits */ #define PF_5R6G5B 6 /* 16-bit TrueColor: 5-R, 6-G, 5-B bits */ #define PF_DITHER 7 /* Color-mapped RGB with dither */ #define PF_LOOKUP 8 /* Color-mapped RGB without dither */ #define PF_HPCR 9 /* HP Color Recovery (ad@lms.be 30/08/95) */ #define PF_1BIT 10 /* monochrome dithering of RGB */ #define PF_GRAYSCALE 11 /* Grayscale or StaticGray */ #define PF_8R8G8B24 12 /* 24-bit TrueColor: 8-R, 8-G, 8-B bits */ #define PF_DITHER_5R6G5B 13 /* 16-bit dithered TrueColor: 5-R, 6-G, 5-B */ /* * If pixelformat==PF_TRUECOLOR: */ #define PACK_TRUECOLOR( PIXEL, R, G, B ) \ PIXEL = xmesa->xm_visual->RtoPixel[R] \ | xmesa->xm_visual->GtoPixel[G] \ | xmesa->xm_visual->BtoPixel[B]; \ /* * If pixelformat==PF_TRUEDITHER: */ #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B ) \ { \ int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)]; \ PIXEL = xmesa->xm_visual->RtoPixel[(R)+d] \ | xmesa->xm_visual->GtoPixel[(G)+d] \ | xmesa->xm_visual->BtoPixel[(B)+d]; \ } /* * If pixelformat==PF_8A8B8G8R: */ #define PACK_8A8B8G8R( R, G, B, A ) \ ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) ) /* * Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable * shortcut. */ #define PACK_8B8G8R( R, G, B ) ( ((B) << 16) | ((G) << 8) | (R) ) /* * If pixelformat==PF_8R8G8B: */ #define PACK_8R8G8B( R, G, B) ( ((R) << 16) | ((G) << 8) | (B) ) /* * If pixelformat==PF_5R6G5B: */ #define PACK_5R6G5B( R, G, B) ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) ) /* * If pixelformat==PF_DITHER: * * Improved 8-bit RGB dithering code contributed by Bob Mercier * (mercier@hollywood.cinenet.net). Thanks Bob! */ #undef _R #undef _G #undef _B #undef _D #ifdef DITHER666 # define _R 6 # define _G 6 # define _B 6 # define _MIX(r,g,b) (((r)*_G+(g))*_B+(b)) #else # define _R 5 # define _G 9 # define _B 5 # define _MIX(r,g,b) ( ((g)<<6) | ((b)<<3) | (r) ) #endif #define _DX 4 #define _DY 4 #define _D (_DX*_DY) /*#define _DITH(C,c,d) (((unsigned)((_D*(C-1)+1)*c+d))/(_D*256))*/ #define _DITH(C,c,d) (((unsigned)((_D*(C-1)+1)*c+d)) >> 12) #define MAXC 256 static int kernel8[_DY*_DX] = { 0 * MAXC, 8 * MAXC, 2 * MAXC, 10 * MAXC, 12 * MAXC, 4 * MAXC, 14 * MAXC, 6 * MAXC, 3 * MAXC, 11 * MAXC, 1 * MAXC, 9 * MAXC, 15 * MAXC, 7 * MAXC, 13 * MAXC, 5 * MAXC, }; /*static int __d;*/ /* Dither for random X,Y */ #define DITHER_SETUP \ int __d; \ unsigned long *ctable = xmesa->xm_buffer->color_table; #define DITHER( X, Y, R, G, B ) \ (__d = kernel8[(((Y)&3)<<2) | ((X)&3)], \ ctable[_MIX(_DITH(_R, (R), __d), \ _DITH(_G, (G), __d), \ _DITH(_B, (B), __d))]) /* Dither for random X, fixed Y */ #define XDITHER_SETUP(Y) \ int __d; \ unsigned long *ctable = xmesa->xm_buffer->color_table; \ int *kernel = &kernel8[ ((Y)&3) << 2 ]; #define XDITHER( X, R, G, B ) \ (__d = kernel[(X)&3], \ ctable[_MIX(_DITH(_R, (R), __d), \ _DITH(_G, (G), __d), \ _DITH(_B, (B), __d))]) /* * Dithering for flat-shaded triangles. Precompute all 16 possible * pixel values given the triangle's RGB color. Contributed by Martin Shenk. */ static GLushort DitherValues[16]; /* array of (up to) 16-bit pixel values */ #define FLAT_DITHER_SETUP( R, G, B ) \ { \ unsigned long *ctable = xmesa->xm_buffer->color_table; \ int msdr = (_D*((_R)-1)+1) * (R); \ int msdg = (_D*((_G)-1)+1) * (G); \ int msdb = (_D*((_B)-1)+1) * (B); \ int i; \ for (i=0;i<16;i++) { \ int k = kernel8[i]; \ int j = _MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 ); \ DitherValues[i] = (GLushort) ctable[j]; \ } \ } #define FLAT_DITHER_ROW_SETUP(Y) \ GLushort *ditherRow = DitherValues + ( ((Y)&3) << 2); #define FLAT_DITHER(X) ditherRow[(X)&3] /* * If pixelformat==PF_LOOKUP: */ #define _DITH0(C,c) (((unsigned)((_D*(C-1)+1)*c)) >> 12) #define LOOKUP_SETUP \ unsigned long *ctable = xmesa->xm_buffer->color_table #define LOOKUP( R, G, B ) \ ctable[_MIX(_DITH0(_R, (R)), \ _DITH0(_G, (G)), \ _DITH0(_B, (B)))] /* * If pixelformat==PF_HPCR: * * HP Color Recovery dithering (ad@lms.be 30/08/95) * HP has on it's 8-bit 700-series computers, a feature called * 'Color Recovery'. This allows near 24-bit output (so they say). * It is enabled by selecting the 8-bit TrueColor visual AND * corresponding colormap (see tkInitWindow) AND doing some special * dither. */ static const short HPCR_DRGB[3][2][16] = { { { 16, -4, 1,-11, 14, -6, 3, -9, 15, -5, 2,-10, 13, -7, 4, -8}, {-15, 5, 0, 12,-13, 7, -2, 10,-14, 6, -1, 11,-12, 8, -3, 9} }, { {-11, 15, -7, 3, -8, 14, -4, 2,-10, 16, -6, 4, -9, 13, -5, 1}, { 12,-14, 8, -2, 9,-13, 5, -1, 11,-15, 7, -3, 10,-12, 6, 0} }, { { 6,-18, 26,-14, 2,-22, 30,-10, 8,-16, 28,-12, 4,-20, 32, -8}, { -4, 20,-24, 16, 0, 24,-28, 12, -6, 18,-26, 14, -2, 22,-30, 10} } }; #define DITHER_HPCR( X, Y, R, G, B ) \ ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0) \ |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \ | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + HPCR_DRGB[2][(Y)&1][(X)&15])>>6) \ ) /* * If pixelformat==PF_1BIT: */ static int const kernel1[16] = { 0*47, 9*47, 4*47, 12*47, /* 47 = (255*3)/16 */ 6*47, 2*47, 14*47, 8*47, 10*47, 1*47, 5*47, 11*47, 7*47, 13*47, 3*47, 15*47 }; #define SETUP_1BIT int bitFlip = xmesa->xm_visual->bitFlip #define DITHER_1BIT( X, Y, R, G, B ) \ (( ((int)(R)+(int)(G)+(int)(B)) > kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip) /* * If pixelformat==PF_GRAYSCALE: */ #define GRAY_RGB( R, G, B ) xmesa->xm_buffer->color_table[((R) + (G) + (B))/3] #define XIMAGE None /* * Converts a GL window Y coord to an X window Y coord: */ #define FLIP(BUFFER, Y) ((BUFFER)->bottom-(Y)) /* * Return the address of a 1, 2 or 4-byte pixel in the back XImage: * X==0 is left, Y==0 is bottom. */ #define PIXELADDR1( BUFFER, X, Y ) \ ( (BUFFER)->ximage_origin1 - (Y) * (BUFFER)->ximage_width1 + (X) ) #define PIXELADDR2( BUFFER, X, Y ) \ ( (BUFFER)->ximage_origin2 - (Y) * (BUFFER)->ximage_width2 + (X) ) #define PIXELADDR3( BUFFER, X, Y ) \ ( (bgr_t *) ( (BUFFER)->ximage_origin3 - (Y) * (BUFFER)->ximage_width3 + 3 * (X) )) #define PIXELADDR4( BUFFER, X, Y ) \ ( (BUFFER)->ximage_origin4 - (Y) * (BUFFER)->ximage_width4 + (X) ) /* * External functions: */ extern unsigned long xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, GLuint pixelFormat ); extern void xmesa_alloc_back_buffer( XMesaBuffer b ); extern void xmesa_update_state( GLcontext *ctx ); extern points_func xmesa_get_points_func( GLcontext *ctx ); extern line_func xmesa_get_line_func( GLcontext *ctx ); extern triangle_func xmesa_get_triangle_func( GLcontext *ctx ); /* XXX this is a hack to implement shared display lists with 3Dfx */ extern XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, XMesaContext c DRI_DRAWABLE_ARG ); /* * These are the extra routines required for integration with XFree86. * None of these routines should be user visible. -KEM */ extern void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ); extern GLboolean XMesaForceCurrent(XMesaContext c); extern GLboolean XMesaLoseCurrent(XMesaContext c); extern void XMesaReset( void ); #endif