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Diffstat (limited to 'src/mesa/drivers/x11/xmesaP.h')
| -rw-r--r-- | src/mesa/drivers/x11/xmesaP.h | 499 |
1 files changed, 499 insertions, 0 deletions
diff --git a/src/mesa/drivers/x11/xmesaP.h b/src/mesa/drivers/x11/xmesaP.h new file mode 100644 index 00000000000..256a47f0a6a --- /dev/null +++ b/src/mesa/drivers/x11/xmesaP.h @@ -0,0 +1,499 @@ +/* $Id: xmesaP.h,v 1.1 1999/08/19 00:55:42 jtg Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.1 + * + * Copyright (C) 1999 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 "xf86glx_util.h" +#else +#ifdef SHM +#include <X11/extensions/XShm.h> +#endif +#endif +#include "GL/xmesa.h" +#include "types.h" +#ifdef FX +#include "GL/fxmesa.h" +#include "../FX/fxdrv.h" +#endif + + +/* for PF_8R8G8B24 pixel format */ +typedef struct { + GLubyte b; + GLubyte g; + GLubyte r; +} bgr_t; + + +/* + * "Derived" from gl_visual. Basically corresponds to an XVisualInfo. + */ +struct xmesa_visual { + GLvisual *gl_visual; /* Device independent visual parameters */ + XMesaDisplay *display; /* The X11 display */ +#ifndef XFree86Server + XVisualInfo *vishandle; /* The pointer returned by glXChooseVisual */ +#endif + XMesaVisualInfo visinfo; /* X's visual info */ + + GLint level; /* 0=normal, 1=overlay, etc */ + + 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 framebuffer */ + + 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 */ +}; + + + +/* + * "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 SHM + 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; + bgr_t *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; + unsigned long alloced_colors[256]; + +#ifdef FX + /* For 3Dfx Glide only */ + GLboolean FXisHackUsable; /* Can we render into window? */ + GLboolean FXwindowHack; /* Are we rendering into a window? */ + fxMesaContext FXctx; +#endif + + 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 ([email protected] 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 + * ([email protected]). Thanks Bob! + */ +#undef _R +#undef _G +#undef _B +#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 ([email protected] 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(Y) (xmesa->xm_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( X, Y ) \ + ( xmesa->xm_buffer->ximage_origin1 - (Y) * xmesa->xm_buffer->ximage_width1 + (X) ) + +#define PIXELADDR2( X, Y ) \ + ( xmesa->xm_buffer->ximage_origin2 - (Y) * xmesa->xm_buffer->ximage_width2 + (X) ) + +#define PIXELADDR3( X, Y ) \ + ( xmesa->xm_buffer->ximage_origin3 - (Y) * xmesa->xm_buffer->ximage_width3 + (X) ) + +#define PIXELADDR4( X, Y ) \ + ( xmesa->xm_buffer->ximage_origin4 - (Y) * xmesa->xm_buffer->ximage_width4 + (X) ) + + + +/* + * External functions: + */ + +extern unsigned long xmesa_color_to_pixel( XMesaContext xmesa, + GLubyte r, GLubyte g, GLubyte b, GLubyte a ); + +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 ); + + +/* + * 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 |