2
* Mesa 3-D graphics library
4
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6
* Permission is hereby granted, free of charge, to any person obtaining a
7
* copy of this software and associated documentation files (the "Software"),
8
* to deal in the Software without restriction, including without limitation
9
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
10
* and/or sell copies of the Software, and to permit persons to whom the
11
* Software is furnished to do so, subject to the following conditions:
13
* The above copyright notice and this permission notice shall be included
14
* in all copies or substantial portions of the Software.
16
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22
* OTHER DEALINGS IN THE SOFTWARE.
30
#include "c11/threads.h"
32
#include "main/mtypes.h"
33
#include "swrast/s_context.h"
36
extern mtx_t _xmesa_lock;
38
extern XMesaBuffer XMesaBufferList;
40
/* for PF_8R8G8B24 pixel format */
48
struct xmesa_renderbuffer;
51
/* Function pointer for clearing color buffers */
52
typedef void (*ClearFunc)( struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
53
GLint x, GLint y, GLint width, GLint height );
58
/** Framebuffer pixel formats */
60
PF_Truecolor, /**< TrueColor or DirectColor, any depth */
61
PF_Dither_True, /**< TrueColor with dithering */
62
PF_8A8R8G8B, /**< 32-bit TrueColor: 8-A, 8-R, 8-G, 8-B bits */
63
PF_8A8B8G8R, /**< 32-bit TrueColor: 8-A, 8-B, 8-G, 8-R bits */
64
PF_8R8G8B, /**< 32-bit TrueColor: 8-R, 8-G, 8-B bits */
65
PF_8R8G8B24, /**< 24-bit TrueColor: 8-R, 8-G, 8-B bits */
66
PF_5R6G5B, /**< 16-bit TrueColor: 5-R, 6-G, 5-B bits */
67
PF_Dither_5R6G5B /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
72
* Visual inforation, derived from struct gl_config.
73
* Basically corresponds to an XVisualInfo.
76
struct gl_config mesa_visual; /* Device independent visual parameters */
77
XMesaDisplay *display; /* The X11 display */
80
XMesaVisualInfo visinfo; /* X's visual info (pointer to private copy) */
81
XVisualInfo *vishandle; /* Only used in fakeglx.c */
82
GLint BitsPerPixel; /* True bits per pixel for XImages */
84
GLboolean ximage_flag; /* Use XImage for back buffer (not pixmap)? */
86
enum pixel_format dithered_pf; /* Pixel format when dithering */
87
enum pixel_format undithered_pf;/* Pixel format when not dithering */
89
GLfloat RedGamma; /* Gamma values, 1.0 is default */
93
/* For PF_TRUECOLOR */
94
GLint rshift, gshift, bshift;/* Pixel color component shifts */
95
GLubyte Kernel[16]; /* Dither kernel */
96
unsigned long RtoPixel[512]; /* RGB to pixel conversion */
97
unsigned long GtoPixel[512];
98
unsigned long BtoPixel[512];
99
GLubyte PixelToR[256]; /* Pixel to RGB conversion */
100
GLubyte PixelToG[256];
101
GLubyte PixelToB[256];
106
* Context info, derived from struct gl_context.
107
* Basically corresponds to a GLXContext.
109
struct xmesa_context {
110
struct gl_context mesa; /* the core library context (containment) */
111
XMesaVisual xm_visual; /* Describes the buffers */
112
XMesaBuffer xm_buffer; /* current span/point/line/triangle buffer */
114
XMesaDisplay *display; /* == xm_visual->display */
115
GLboolean swapbytes; /* Host byte order != display byte order? */
116
GLboolean direct; /* Direct rendering context? */
118
enum pixel_format pixelformat;
120
GLubyte clearcolor[4]; /* current clearing color */
121
unsigned long clearpixel; /* current clearing pixel value */
126
* Types of X/GLX drawables we might render into.
129
WINDOW, /* An X window */
130
GLXWINDOW, /* GLX window */
131
PIXMAP, /* GLX pixmap */
132
PBUFFER /* GLX Pbuffer */
136
/** Values for db_mode: */
138
#define BACK_PIXMAP 1
139
#define BACK_XIMAGE 2
144
* An xmesa_renderbuffer represents the back or front color buffer.
145
* For the front color buffer:
146
* <drawable> is the X window
147
* For the back color buffer:
148
* Either <ximage> or <pixmap> will be used, never both.
149
* In any case, <drawable> always equals <pixmap>.
150
* For stand-alone Mesa, we could merge <drawable> and <pixmap> into one
151
* field. We don't do that for the server-side GLcore module because
152
* pixmaps and drawables are different and we'd need a bunch of casts.
154
struct xmesa_renderbuffer
156
struct swrast_renderbuffer Base; /* Base class */
158
XMesaBuffer Parent; /**< The XMesaBuffer this renderbuffer belongs to */
159
XMesaDrawable drawable; /* Usually the X window ID */
160
XMesaPixmap pixmap; /* Back color buffer */
161
XMesaImage *ximage; /* The back buffer, if not using a Pixmap */
163
GLushort *origin2; /* used for PIXEL_ADDR2 macro */
165
GLubyte *origin3; /* used for PIXEL_ADDR3 macro */
167
GLuint *origin4; /* used for PIXEL_ADDR4 macro */
170
GLint bottom; /* used for FLIP macro, equals height - 1 */
174
GLuint map_x, map_y, map_w, map_h;
176
XMesaImage *map_ximage;
181
* Framebuffer information, derived from.
182
* Basically corresponds to a GLXDrawable.
184
struct xmesa_buffer {
185
struct gl_framebuffer mesa_buffer; /* depth, stencil, accum, etc buffers */
186
/* This MUST BE FIRST! */
187
GLboolean wasCurrent; /* was ever the current buffer? */
188
XMesaVisual xm_visual; /* the X/Mesa visual */
190
XMesaDisplay *display;
191
BufferType type; /* window, pixmap, pbuffer or glxwindow */
193
GLboolean largestPbuffer; /**< for pbuffers */
194
GLboolean preservedContents; /**< for pbuffers */
196
struct xmesa_renderbuffer *frontxrb; /* front color renderbuffer */
197
struct xmesa_renderbuffer *backxrb; /* back color renderbuffer */
199
XMesaColormap cmap; /* the X colormap */
201
unsigned long selectedEvents;/* for pbuffers only */
203
GLint db_mode; /* 0 = single buffered */
204
/* BACK_PIXMAP = use Pixmap for back buffer */
205
/* BACK_XIMAGE = use XImage for back buffer */
206
GLuint shm; /* X Shared Memory extension status: */
207
/* 0 = not available */
208
/* 1 = XImage support available */
209
/* 2 = Pixmap support available too */
210
#if defined(USE_XSHM)
211
XShmSegmentInfo shminfo;
214
// XMesaImage *rowimage; /* Used for optimized span writing */
215
XMesaPixmap stipple_pixmap; /* For polygon stippling */
216
XMesaGC stipple_gc; /* For polygon stippling */
218
XMesaGC gc; /* scratch GC for span, line, tri drawing */
219
XMesaGC cleargc; /* GC for clearing the color buffer */
220
XMesaGC swapgc; /* GC for swapping the color buffers */
222
/* The following are here instead of in the XMesaVisual
223
* because they depend on the window's colormap.
226
/* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
227
unsigned long color_table[576]; /* RGB -> pixel value */
229
/* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
230
GLubyte pixel_to_r[65536]; /* pixel value -> red */
231
GLubyte pixel_to_g[65536]; /* pixel value -> green */
232
GLubyte pixel_to_b[65536]; /* pixel value -> blue */
234
/* Used to do XAllocColor/XFreeColors accounting: */
236
unsigned long alloced_colors[256];
238
/* GLX_EXT_texture_from_pixmap */
239
GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
240
GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
241
GLint TextureMipmap; /** 0 or 1 */
243
struct xmesa_buffer *Next; /* Linked list pointer: */
248
* If pixelformat==PF_TRUECOLOR:
250
#define PACK_TRUECOLOR( PIXEL, R, G, B ) \
251
PIXEL = xmesa->xm_visual->RtoPixel[R] \
252
| xmesa->xm_visual->GtoPixel[G] \
253
| xmesa->xm_visual->BtoPixel[B]; \
257
* If pixelformat==PF_TRUEDITHER:
259
#define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B ) \
261
int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)]; \
262
PIXEL = xmesa->xm_visual->RtoPixel[(R)+d] \
263
| xmesa->xm_visual->GtoPixel[(G)+d] \
264
| xmesa->xm_visual->BtoPixel[(B)+d]; \
270
* If pixelformat==PF_8A8B8G8R:
272
#define PACK_8A8B8G8R( R, G, B, A ) \
273
( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
277
* Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable
280
#define PACK_8B8G8R( R, G, B ) ( ((B) << 16) | ((G) << 8) | (R) )
285
* If pixelformat==PF_8R8G8B:
287
#define PACK_8R8G8B( R, G, B) ( ((R) << 16) | ((G) << 8) | (B) )
291
* If pixelformat==PF_5R6G5B:
293
#define PACK_5R6G5B( R, G, B) ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
297
* If pixelformat==PF_8A8R8G8B:
299
#define PACK_8A8R8G8B( R, G, B, A ) \
300
( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
306
* Converts a GL window Y coord to an X window Y coord:
308
#define YFLIP(XRB, Y) ((XRB)->bottom - (Y))
312
* Return the address of a 2, 3 or 4-byte pixel in the buffer's XImage:
313
* X==0 is left, Y==0 is bottom.
315
#define PIXEL_ADDR2(XRB, X, Y) \
316
( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
318
#define PIXEL_ADDR3(XRB, X, Y) \
319
( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
321
#define PIXEL_ADDR4(XRB, X, Y) \
322
( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
327
* External functions:
330
extern struct xmesa_renderbuffer *
331
xmesa_new_renderbuffer(struct gl_context *ctx, GLuint name,
332
const struct xmesa_visual *xmvis,
333
GLboolean backBuffer);
336
xmesa_delete_framebuffer(struct gl_framebuffer *fb);
339
xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis);
342
xmesa_color_to_pixel( struct gl_context *ctx,
343
GLubyte r, GLubyte g, GLubyte b, GLubyte a,
344
GLuint pixelFormat );
347
xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
348
GLuint *width, GLuint *height);
351
xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer);
354
xmesa_init_driver_functions( XMesaVisual xmvisual,
355
struct dd_function_table *driver );
358
xmesa_update_state( struct gl_context *ctx, GLbitfield new_state );
362
xmesa_MapRenderbuffer(struct gl_context *ctx,
363
struct gl_renderbuffer *rb,
364
GLuint x, GLuint y, GLuint w, GLuint h,
366
GLubyte **mapOut, GLint *rowStrideOut);
369
xmesa_UnmapRenderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb);
372
xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
376
* Using a function instead of an ordinary cast is safer.
378
static INLINE struct xmesa_renderbuffer *
379
xmesa_renderbuffer(struct gl_renderbuffer *rb)
381
return (struct xmesa_renderbuffer *) rb;
386
* Return pointer to XMesaContext corresponding to a Mesa struct gl_context.
387
* Since we're using structure containment, it's just a cast!.
389
static INLINE XMesaContext
390
XMESA_CONTEXT(struct gl_context *ctx)
392
return (XMesaContext) ctx;
397
* Return pointer to XMesaBuffer corresponding to a Mesa struct gl_framebuffer.
398
* Since we're using structure containment, it's just a cast!.
400
static INLINE XMesaBuffer
401
XMESA_BUFFER(struct gl_framebuffer *b)
403
return (XMesaBuffer) b;
407
/* Plugged into the software rasterizer. Try to use internal
408
* swrast-style point, line and triangle functions.
410
extern void xmesa_choose_point( struct gl_context *ctx );
411
extern void xmesa_choose_line( struct gl_context *ctx );
412
extern void xmesa_choose_triangle( struct gl_context *ctx );
415
extern void xmesa_register_swrast_functions( struct gl_context *ctx );
419
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
420
#define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
422
#define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */
426
#define TEST_META_FUNCS 0