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 */
229 GLuint shm
; /* X Shared Memory extension status: */
230 /* 0 = not available */
231 /* 1 = XImage support available */
232 /* 2 = Pixmap support available too */
233 #if defined(USE_XSHM) && !defined(XFree86Server)
234 XShmSegmentInfo shminfo
;
237 XMesaImage
*rowimage
; /* Used for optimized span writing */
238 XMesaPixmap stipple_pixmap
; /* For polygon stippling */
239 XMesaGC stipple_gc
; /* For polygon stippling */
241 XMesaGC gc
; /* scratch GC for span, line, tri drawing */
242 XMesaGC cleargc
; /* GC for clearing the color buffer */
243 XMesaGC swapgc
; /* GC for swapping the color buffers */
245 /* The following are here instead of in the XMesaVisual
246 * because they depend on the window's colormap.
249 /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
250 unsigned long color_table
[576]; /* RGB -> pixel value */
252 /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
253 GLubyte pixel_to_r
[65536]; /* pixel value -> red */
254 GLubyte pixel_to_g
[65536]; /* pixel value -> green */
255 GLubyte pixel_to_b
[65536]; /* pixel value -> blue */
257 /* Used to do XAllocColor/XFreeColors accounting: */
259 #if defined(XFree86Server)
260 Pixel alloced_colors
[256];
262 unsigned long alloced_colors
[256];
266 /* For 3Dfx Glide only */
267 GLboolean FXisHackUsable
; /* Can we render into window? */
268 GLboolean FXwindowHack
; /* Are we rendering into a window? */
272 struct xmesa_buffer
*Next
; /* Linked list pointer: */
277 * If pixelformat==PF_TRUECOLOR:
279 #define PACK_TRUECOLOR( PIXEL, R, G, B ) \
280 PIXEL = xmesa->xm_visual->RtoPixel[R] \
281 | xmesa->xm_visual->GtoPixel[G] \
282 | xmesa->xm_visual->BtoPixel[B]; \
286 * If pixelformat==PF_TRUEDITHER:
288 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B ) \
290 int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)]; \
291 PIXEL = xmesa->xm_visual->RtoPixel[(R)+d] \
292 | xmesa->xm_visual->GtoPixel[(G)+d] \
293 | xmesa->xm_visual->BtoPixel[(B)+d]; \
299 * If pixelformat==PF_8A8B8G8R:
301 #define PACK_8A8B8G8R( R, G, B, A ) \
302 ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
306 * Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable
309 #define PACK_8B8G8R( R, G, B ) ( ((B) << 16) | ((G) << 8) | (R) )
314 * If pixelformat==PF_8R8G8B:
316 #define PACK_8R8G8B( R, G, B) ( ((R) << 16) | ((G) << 8) | (B) )
320 * If pixelformat==PF_5R6G5B:
322 #define PACK_5R6G5B( R, G, B) ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
326 * If pixelformat==PF_8A8R8G8B:
328 #define PACK_8A8R8G8B( R, G, B, A ) \
329 ( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
334 * If pixelformat==PF_DITHER:
336 * Improved 8-bit RGB dithering code contributed by Bob Mercier
337 * (mercier@hollywood.cinenet.net). Thanks Bob!
343 # define DITH_MIX(r,g,b) (((r) * DITH_G + (g)) * DITH_B + (b))
348 # define DITH_MIX(r,g,b) (((g) << 6) | ((b) << 3) | (r))
352 #define DITH_N (DITH_DX * DITH_DY)
354 #define _dither(C, c, d) (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12)
357 extern const int xmesa_kernel8
[DITH_DY
* DITH_DX
];
359 /* Dither for random X,Y */
360 #define DITHER_SETUP \
362 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;
364 #define DITHER( X, Y, R, G, B ) \
365 (__d = xmesa_kernel8[(((Y)&3)<<2) | ((X)&3)], \
366 ctable[DITH_MIX(_dither(DITH_R, (R), __d), \
367 _dither(DITH_G, (G), __d), \
368 _dither(DITH_B, (B), __d))])
370 /* Dither for random X, fixed Y */
371 #define XDITHER_SETUP(Y) \
373 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \
374 const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ];
376 #define XDITHER( X, R, G, B ) \
377 (__d = kernel[(X)&3], \
378 ctable[DITH_MIX(_dither(DITH_R, (R), __d), \
379 _dither(DITH_G, (G), __d), \
380 _dither(DITH_B, (B), __d))])
385 * Dithering for flat-shaded triangles. Precompute all 16 possible
386 * pixel values given the triangle's RGB color. Contributed by Martin Shenk.
388 #define FLAT_DITHER_SETUP( R, G, B ) \
389 GLushort ditherValues[16]; \
391 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \
392 int msdr = (DITH_N*((DITH_R)-1)+1) * (R); \
393 int msdg = (DITH_N*((DITH_G)-1)+1) * (G); \
394 int msdb = (DITH_N*((DITH_B)-1)+1) * (B); \
396 for (i=0;i<16;i++) { \
397 int k = xmesa_kernel8[i]; \
398 int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\
399 ditherValues[i] = (GLushort) ctable[j]; \
403 #define FLAT_DITHER_ROW_SETUP(Y) \
404 GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2);
406 #define FLAT_DITHER(X) ditherRow[(X)&3]
411 * If pixelformat==PF_LOOKUP:
413 #define _dither_lookup(C, c) (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
415 #define LOOKUP_SETUP \
416 unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table
418 #define LOOKUP( R, G, B ) \
419 ctable[DITH_MIX(_dither_lookup(DITH_R, (R)), \
420 _dither_lookup(DITH_G, (G)), \
421 _dither_lookup(DITH_B, (B)))]
425 * If pixelformat==PF_HPCR:
427 * HP Color Recovery dithering (ad@lms.be 30/08/95)
428 * HP has on it's 8-bit 700-series computers, a feature called
429 * 'Color Recovery'. This allows near 24-bit output (so they say).
430 * It is enabled by selecting the 8-bit TrueColor visual AND
431 * corresponding colormap (see tkInitWindow) AND doing some special
434 extern const short xmesa_HPCR_DRGB
[3][2][16];
436 #define DITHER_HPCR( X, Y, R, G, B ) \
437 ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0) \
438 |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
439 | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6) \
445 * If pixelformat==PF_1BIT:
447 extern const int xmesa_kernel1
[16];
449 #define SETUP_1BIT int bitFlip = xmesa->xm_visual->bitFlip
450 #define DITHER_1BIT( X, Y, R, G, B ) \
451 (( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
456 * If pixelformat==PF_GRAYSCALE:
458 #define GRAY_RGB( R, G, B ) XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
463 * Converts a GL window Y coord to an X window Y coord:
465 #define YFLIP(XRB, Y) ((XRB)->bottom - (Y))
469 * Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
470 * X==0 is left, Y==0 is bottom.
472 #define PIXEL_ADDR1(XRB, X, Y) \
473 ( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) )
475 #define PIXEL_ADDR2(XRB, X, Y) \
476 ( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
478 #define PIXEL_ADDR3(XRB, X, Y) \
479 ( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
481 #define PIXEL_ADDR4(XRB, X, Y) \
482 ( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
487 * External functions:
490 extern struct xmesa_renderbuffer
*
491 xmesa_new_renderbuffer(GLcontext
*ctx
, GLuint name
, const GLvisual
*visual
,
492 GLboolean backBuffer
);
495 xmesa_delete_framebuffer(struct gl_framebuffer
*fb
);
498 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
);
501 xmesa_color_to_pixel( GLcontext
*ctx
,
502 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
503 GLuint pixelFormat
);
506 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
507 GLuint
*width
, GLuint
*height
);
510 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
);
513 xmesa_init_driver_functions( XMesaVisual xmvisual
,
514 struct dd_function_table
*driver
);
517 xmesa_update_state( GLcontext
*ctx
, GLbitfield new_state
);
520 xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer
*xrb
,
521 enum pixel_format pixelformat
, GLint depth
);
524 xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
);
528 * Using a function instead of an ordinary cast is safer.
530 static INLINE
struct xmesa_renderbuffer
*
531 xmesa_renderbuffer(struct gl_renderbuffer
*rb
)
533 return (struct xmesa_renderbuffer
*) rb
;
538 * Return pointer to XMesaContext corresponding to a Mesa GLcontext.
539 * Since we're using structure containment, it's just a cast!.
540 * XXX should use inlined function for better type safety.
542 static INLINE XMesaContext
543 XMESA_CONTEXT(GLcontext
*ctx
)
545 return (XMesaContext
) ctx
;
550 * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
551 * Since we're using structure containment, it's just a cast!.
552 * XXX should use inlined function for better type safety.
554 static INLINE XMesaBuffer
555 XMESA_BUFFER(GLframebuffer
*b
)
557 return (XMesaBuffer
) b
;
561 /* Plugged into the software rasterizer. Try to use internal
562 * swrast-style point, line and triangle functions.
564 extern void xmesa_choose_point( GLcontext
*ctx
);
565 extern void xmesa_choose_line( GLcontext
*ctx
);
566 extern void xmesa_choose_triangle( GLcontext
*ctx
);
569 extern void xmesa_register_swrast_functions( GLcontext
*ctx
);
573 /* XXX this is a hack to implement shared display lists with 3Dfx */
574 extern XMesaBuffer
XMesaCreateWindowBuffer2( XMesaVisual v
,
579 * These are the extra routines required for integration with XFree86.
580 * None of these routines should be user visible. -KEM
582 extern GLboolean
XMesaForceCurrent(XMesaContext c
);
583 extern GLboolean
XMesaLoseCurrent(XMesaContext c
);
584 extern GLboolean
XMesaCopyContext( XMesaContext src
,
589 #define ENABLE_EXT_texure_compression_s3tc 0 /* SW texture compression */
592 #define ENABLE_EXT_timer_query 0
593 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
594 #define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
596 #define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */