Initial revision

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