2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 # include "xf86glx_util.h"
32 #elif defined(USE_XSHM)
33 # include <X11/extensions/XShm.h>
38 #include "GL/fxmesa.h"
39 #include "../glide/fxdrv.h"
43 extern _glthread_Mutex _xmesa_lock
;
45 extern XMesaBuffer XMesaBufferList
;
47 /* for PF_8R8G8B24 pixel format */
55 struct xmesa_renderbuffer
;
58 /* Function pointer for clearing color buffers */
59 typedef void (*ClearFunc
)( GLcontext
*ctx
, struct xmesa_renderbuffer
*xrb
,
60 GLint x
, GLint y
, GLint width
, GLint height
);
65 /** Framebuffer pixel formats */
67 PF_Index
, /**< Color Index mode */
68 PF_Truecolor
, /**< TrueColor or DirectColor, any depth */
69 PF_Dither_True
, /**< TrueColor with dithering */
70 PF_8A8B8G8R
, /**< 32-bit TrueColor: 8-A, 8-B, 8-G, 8-R */
71 PF_8R8G8B
, /**< 32-bit TrueColor: 8-R, 8-G, 8-B bits */
72 PF_5R6G5B
, /**< 16-bit TrueColor: 5-R, 6-G, 5-B bits */
73 PF_Dither
, /**< Color-mapped RGB with dither */
74 PF_Lookup
, /**< Color-mapped RGB without dither */
75 PF_HPCR
, /**< HP Color Recovery (ad@lms.be 30/08/95) */
76 PF_1Bit
, /**< monochrome dithering of RGB */
77 PF_Grayscale
, /**< Grayscale or StaticGray */
78 PF_8R8G8B24
, /**< 24-bit TrueColor: 8-R, 8-G, 8-B bits */
79 PF_Dither_5R6G5B
, /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
80 PF_8A8R8G8B
/**< 32-bit TrueColor: 8-A, 8-R, 8-G, 8-B */
85 * Visual inforation, derived from GLvisual.
86 * Basically corresponds to an XVisualInfo.
89 GLvisual mesa_visual
; /* Device independent visual parameters */
90 XMesaDisplay
*display
; /* The X11 display */
92 GLint ColormapEntries
;
95 XMesaVisualInfo visinfo
; /* X's visual info (pointer to private copy) */
96 XVisualInfo
*vishandle
; /* Only used in fakeglx.c */
98 GLint BitsPerPixel
; /* True bits per pixel for XImages */
100 GLboolean ximage_flag
; /* Use XImage for back buffer (not pixmap)? */
102 enum pixel_format dithered_pf
; /* Pixel format when dithering */
103 enum pixel_format undithered_pf
;/* Pixel format when not dithering */
105 GLfloat RedGamma
; /* Gamma values, 1.0 is default */
109 /* For PF_TRUECOLOR */
110 GLint rshift
, gshift
, bshift
;/* Pixel color component shifts */
111 GLubyte Kernel
[16]; /* Dither kernel */
112 unsigned long RtoPixel
[512]; /* RGB to pixel conversion */
113 unsigned long GtoPixel
[512];
114 unsigned long BtoPixel
[512];
115 GLubyte PixelToR
[256]; /* Pixel to RGB conversion */
116 GLubyte PixelToG
[256];
117 GLubyte PixelToB
[256];
120 short hpcr_rgbTbl
[3][256];
121 GLboolean hpcr_clear_flag
;
122 GLubyte hpcr_clear_ximage_pattern
[2][16];
123 XMesaImage
*hpcr_clear_ximage
;
124 XMesaPixmap hpcr_clear_pixmap
;
132 * Context info, dDerived from GLcontext.
133 * Basically corresponds to a GLXContext.
135 struct xmesa_context
{
136 GLcontext mesa
; /* the core library context (containment) */
137 XMesaVisual xm_visual
; /* Describes the buffers */
138 XMesaBuffer xm_buffer
; /* current span/point/line/triangle buffer */
140 XMesaDisplay
*display
; /* == xm_visual->display */
141 GLboolean swapbytes
; /* Host byte order != display byte order? */
142 GLboolean direct
; /* Direct rendering context? */
144 enum pixel_format pixelformat
;
146 GLubyte clearcolor
[4]; /* current clearing color */
147 unsigned long clearpixel
; /* current clearing pixel value */
152 * Types of X/GLX drawables we might render into.
155 WINDOW
, /* An X window */
156 GLXWINDOW
, /* GLX window */
157 PIXMAP
, /* GLX pixmap */
158 PBUFFER
/* GLX Pbuffer */
162 /** Values for db_mode: */
164 #define BACK_PIXMAP 1
165 #define BACK_XIMAGE 2
170 * An xmesa_renderbuffer represents the back or front color buffer.
171 * For the front color buffer:
172 * <drawable> is the X window
173 * For the back color buffer:
174 * Either <ximage> or <pixmap> will be used, never both.
175 * In any case, <drawable> always equals <pixmap>.
176 * For stand-alone Mesa, we could merge <drawable> and <pixmap> into one
177 * field. We don't do that for the server-side GLcore module because
178 * pixmaps and drawables are different and we'd need a bunch of casts.
180 struct xmesa_renderbuffer
182 struct gl_renderbuffer Base
; /* Base class */
184 XMesaBuffer Parent
; /**< The XMesaBuffer this renderbuffer belongs to */
185 XMesaDrawable drawable
; /* Usually the X window ID */
186 XMesaPixmap pixmap
; /* Back color buffer */
187 XMesaImage
*ximage
; /* The back buffer, if not using a Pixmap */
189 GLubyte
*origin1
; /* used for PIXEL_ADDR1 macro */
191 GLushort
*origin2
; /* used for PIXEL_ADDR2 macro */
193 GLubyte
*origin3
; /* used for PIXEL_ADDR3 macro */
195 GLuint
*origin4
; /* used for PIXEL_ADDR4 macro */
198 GLint bottom
; /* used for FLIP macro, equals height - 1 */
205 * Framebuffer information, derived from.
206 * Basically corresponds to a GLXDrawable.
208 struct xmesa_buffer
{
209 GLframebuffer mesa_buffer
; /* depth, stencil, accum, etc buffers */
210 /* This MUST BE FIRST! */
211 GLboolean wasCurrent
; /* was ever the current buffer? */
212 XMesaVisual xm_visual
; /* the X/Mesa visual */
214 XMesaDisplay
*display
;
215 BufferType type
; /* window, pixmap, pbuffer or glxwindow */
217 struct xmesa_renderbuffer
*frontxrb
; /* front color renderbuffer */
218 struct xmesa_renderbuffer
*backxrb
; /* back color renderbuffer */
220 XMesaColormap cmap
; /* the X colormap */
222 unsigned long selectedEvents
;/* for pbuffers only */
224 GLint db_mode
; /* 0 = single buffered */
225 /* BACK_PIXMAP = use Pixmap for back buffer */
226 /* BACK_XIMAGE = use XImage for back buffer */
228 GLuint shm
; /* X Shared Memory extension status: */
229 /* 0 = not available */
230 /* 1 = XImage support available */
231 /* 2 = Pixmap support available too */
232 #if defined(USE_XSHM) && !defined(XFree86Server)
233 XShmSegmentInfo shminfo
;
236 XMesaImage
*rowimage
; /* Used for optimized span writing */
237 XMesaPixmap stipple_pixmap
; /* For polygon stippling */
238 XMesaGC stipple_gc
; /* For polygon stippling */
240 XMesaGC gc
; /* scratch GC for span, line, tri drawing */
241 XMesaGC cleargc
; /* GC for clearing the color buffer */
242 XMesaGC swapgc
; /* GC for swapping the color buffers */
244 /* The following are here instead of in the XMesaVisual
245 * because they depend on the window's colormap.
248 /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
249 unsigned long color_table
[576]; /* RGB -> pixel value */
251 /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
252 GLubyte pixel_to_r
[65536]; /* pixel value -> red */
253 GLubyte pixel_to_g
[65536]; /* pixel value -> green */
254 GLubyte pixel_to_b
[65536]; /* pixel value -> blue */
256 /* Used to do XAllocColor/XFreeColors accounting: */
258 #if defined(XFree86Server)
259 Pixel alloced_colors
[256];
261 unsigned long alloced_colors
[256];
265 /* For 3Dfx Glide only */
266 GLboolean FXisHackUsable
; /* Can we render into window? */
267 GLboolean FXwindowHack
; /* Are we rendering into a window? */
271 struct xmesa_buffer
*Next
; /* Linked list pointer: */
276 * If pixelformat==PF_TRUECOLOR:
278 #define PACK_TRUECOLOR( PIXEL, R, G, B ) \
279 PIXEL = xmesa->xm_visual->RtoPixel[R] \
280 | xmesa->xm_visual->GtoPixel[G] \
281 | xmesa->xm_visual->BtoPixel[B]; \
285 * If pixelformat==PF_TRUEDITHER:
287 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B ) \
289 int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)]; \
290 PIXEL = xmesa->xm_visual->RtoPixel[(R)+d] \
291 | xmesa->xm_visual->GtoPixel[(G)+d] \
292 | xmesa->xm_visual->BtoPixel[(B)+d]; \
298 * If pixelformat==PF_8A8B8G8R:
300 #define PACK_8A8B8G8R( R, G, B, A ) \
301 ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
305 * Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable
308 #define PACK_8B8G8R( R, G, B ) ( ((B) << 16) | ((G) << 8) | (R) )
313 * If pixelformat==PF_8R8G8B:
315 #define PACK_8R8G8B( R, G, B) ( ((R) << 16) | ((G) << 8) | (B) )
319 * If pixelformat==PF_5R6G5B:
321 #define PACK_5R6G5B( R, G, B) ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
325 * If pixelformat==PF_8A8R8G8B:
327 #define PACK_8A8R8G8B( R, G, B, A ) \
328 ( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
333 * If pixelformat==PF_DITHER:
335 * Improved 8-bit RGB dithering code contributed by Bob Mercier
336 * (mercier@hollywood.cinenet.net). Thanks Bob!
342 # define DITH_MIX(r,g,b) (((r) * DITH_G + (g)) * DITH_B + (b))
347 # define DITH_MIX(r,g,b) (((g) << 6) | ((b) << 3) | (r))
351 #define DITH_N (DITH_DX * DITH_DY)
353 #define _dither(C, c, d) (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12)
356 extern const int xmesa_kernel8
[DITH_DY
* DITH_DX
];
358 /* Dither for random X,Y */
359 #define DITHER_SETUP \
361 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;
363 #define DITHER( X, Y, R, G, B ) \
364 (__d = xmesa_kernel8[(((Y)&3)<<2) | ((X)&3)], \
365 ctable[DITH_MIX(_dither(DITH_R, (R), __d), \
366 _dither(DITH_G, (G), __d), \
367 _dither(DITH_B, (B), __d))])
369 /* Dither for random X, fixed Y */
370 #define XDITHER_SETUP(Y) \
372 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \
373 const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ];
375 #define XDITHER( X, R, G, B ) \
376 (__d = kernel[(X)&3], \
377 ctable[DITH_MIX(_dither(DITH_R, (R), __d), \
378 _dither(DITH_G, (G), __d), \
379 _dither(DITH_B, (B), __d))])
384 * Dithering for flat-shaded triangles. Precompute all 16 possible
385 * pixel values given the triangle's RGB color. Contributed by Martin Shenk.
387 #define FLAT_DITHER_SETUP( R, G, B ) \
388 GLushort ditherValues[16]; \
390 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \
391 int msdr = (DITH_N*((DITH_R)-1)+1) * (R); \
392 int msdg = (DITH_N*((DITH_G)-1)+1) * (G); \
393 int msdb = (DITH_N*((DITH_B)-1)+1) * (B); \
395 for (i=0;i<16;i++) { \
396 int k = xmesa_kernel8[i]; \
397 int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\
398 ditherValues[i] = (GLushort) ctable[j]; \
402 #define FLAT_DITHER_ROW_SETUP(Y) \
403 GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2);
405 #define FLAT_DITHER(X) ditherRow[(X)&3]
410 * If pixelformat==PF_LOOKUP:
412 #define _dither_lookup(C, c) (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
414 #define LOOKUP_SETUP \
415 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table
417 #define LOOKUP( R, G, B ) \
418 ctable[DITH_MIX(_dither_lookup(DITH_R, (R)), \
419 _dither_lookup(DITH_G, (G)), \
420 _dither_lookup(DITH_B, (B)))]
424 * If pixelformat==PF_HPCR:
426 * HP Color Recovery dithering (ad@lms.be 30/08/95)
427 * HP has on it's 8-bit 700-series computers, a feature called
428 * 'Color Recovery'. This allows near 24-bit output (so they say).
429 * It is enabled by selecting the 8-bit TrueColor visual AND
430 * corresponding colormap (see tkInitWindow) AND doing some special
433 extern const short xmesa_HPCR_DRGB
[3][2][16];
435 #define DITHER_HPCR( X, Y, R, G, B ) \
436 ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0) \
437 |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
438 | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6) \
444 * If pixelformat==PF_1BIT:
446 extern const int xmesa_kernel1
[16];
448 #define SETUP_1BIT int bitFlip = xmesa->xm_visual->bitFlip
449 #define DITHER_1BIT( X, Y, R, G, B ) \
450 (( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
455 * If pixelformat==PF_GRAYSCALE:
457 #define GRAY_RGB( R, G, B ) XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
462 * Converts a GL window Y coord to an X window Y coord:
464 #define YFLIP(XRB, Y) ((XRB)->bottom - (Y))
468 * Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
469 * X==0 is left, Y==0 is bottom.
471 #define PIXEL_ADDR1(XRB, X, Y) \
472 ( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) )
474 #define PIXEL_ADDR2(XRB, X, Y) \
475 ( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
477 #define PIXEL_ADDR3(XRB, X, Y) \
478 ( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
480 #define PIXEL_ADDR4(XRB, X, Y) \
481 ( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
486 * External functions:
489 extern struct xmesa_renderbuffer
*
490 xmesa_new_renderbuffer(GLcontext
*ctx
, GLuint name
, const GLvisual
*visual
,
491 GLboolean backBuffer
);
494 xmesa_delete_framebuffer(struct gl_framebuffer
*fb
);
497 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
);
500 xmesa_color_to_pixel( GLcontext
*ctx
,
501 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
502 GLuint pixelFormat
);
505 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
506 GLuint
*width
, GLuint
*height
);
509 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
);
512 xmesa_init_driver_functions( XMesaVisual xmvisual
,
513 struct dd_function_table
*driver
);
516 xmesa_update_state( GLcontext
*ctx
, GLbitfield new_state
);
519 xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer
*xrb
,
520 enum pixel_format pixelformat
, GLint depth
);
523 xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
);
527 * Using a function instead of an ordinary cast is safer.
529 static INLINE
struct xmesa_renderbuffer
*
530 xmesa_renderbuffer(struct gl_renderbuffer
*rb
)
532 return (struct xmesa_renderbuffer
*) rb
;
537 * Return pointer to XMesaContext corresponding to a Mesa GLcontext.
538 * Since we're using structure containment, it's just a cast!.
539 * XXX should use inlined function for better type safety.
541 static INLINE XMesaContext
542 XMESA_CONTEXT(GLcontext
*ctx
)
544 return (XMesaContext
) ctx
;
549 * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
550 * Since we're using structure containment, it's just a cast!.
551 * XXX should use inlined function for better type safety.
553 static INLINE XMesaBuffer
554 XMESA_BUFFER(GLframebuffer
*b
)
556 return (XMesaBuffer
) b
;
560 /* Plugged into the software rasterizer. Try to use internal
561 * swrast-style point, line and triangle functions.
563 extern void xmesa_choose_point( GLcontext
*ctx
);
564 extern void xmesa_choose_line( GLcontext
*ctx
);
565 extern void xmesa_choose_triangle( GLcontext
*ctx
);
568 extern void xmesa_register_swrast_functions( GLcontext
*ctx
);
572 /* XXX this is a hack to implement shared display lists with 3Dfx */
573 extern XMesaBuffer
XMesaCreateWindowBuffer2( XMesaVisual v
,
578 * These are the extra routines required for integration with XFree86.
579 * None of these routines should be user visible. -KEM
581 extern void XMesaSetVisualDisplay( XMesaDisplay
*dpy
, XMesaVisual v
);
582 extern GLboolean
XMesaForceCurrent(XMesaContext c
);
583 extern GLboolean
XMesaLoseCurrent(XMesaContext c
);
584 extern void XMesaReset( void );
587 #define ENABLE_EXT_texure_compression_s3tc 0 /* SW texture compression */
590 #define ENABLE_EXT_timer_query 0
591 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
592 #define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
594 #define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */