2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included 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 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
33 * Direct rendering support added by Precision Insight, Inc.
35 * \author Kevin E. Martin <kevin@precisioninsight.com>
38 #ifndef _GLX_client_h_
39 #define _GLX_client_h_
40 #include <X11/Xproto.h>
41 #include <X11/Xlibint.h>
42 #include <X11/Xfuncproto.h>
43 #include <X11/extensions/extutil.h>
44 #define GLX_GLXEXT_PROTOTYPES
46 #include <GL/glxext.h>
53 #include "GL/glxproto.h"
54 #include "glapi/glapitable.h"
55 #include "glxconfig.h"
57 #if defined( PTHREADS )
61 #include "glxextensions.h"
63 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
65 #define GLX_MAJOR_VERSION 1 /* current version numbers */
66 #define GLX_MINOR_VERSION 4
68 #define __GLX_MAX_TEXTURE_UNITS 32
73 /************************************************************************/
75 #ifdef GLX_DIRECT_RENDERING
77 extern void DRI_glXUseXFont(struct glx_context
*ctx
,
78 Font font
, int first
, int count
, int listbase
);
82 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
85 * Display dependent methods. This structure is initialized during the
86 * \c driCreateDisplay call.
88 typedef struct __GLXDRIdisplayRec __GLXDRIdisplay
;
89 typedef struct __GLXDRIscreenRec __GLXDRIscreen
;
90 typedef struct __GLXDRIdrawableRec __GLXDRIdrawable
;
92 struct __GLXDRIdisplayRec
95 * Method to destroy the private DRI display data.
97 void (*destroyDisplay
) (__GLXDRIdisplay
* display
);
99 struct glx_screen
*(*createScreen
)(int screen
, struct glx_display
* priv
);
102 struct __GLXDRIscreenRec
{
104 void (*destroyScreen
)(struct glx_screen
*psc
);
106 struct glx_context
*(*createContext
)(struct glx_screen
*psc
,
107 struct glx_config
*config
,
108 struct glx_context
*shareList
,
111 __GLXDRIdrawable
*(*createDrawable
)(struct glx_screen
*psc
,
113 GLXDrawable glxDrawable
,
114 struct glx_config
*config
);
116 int64_t (*swapBuffers
)(__GLXDRIdrawable
*pdraw
, int64_t target_msc
,
117 int64_t divisor
, int64_t remainder
);
118 void (*copySubBuffer
)(__GLXDRIdrawable
*pdraw
,
119 int x
, int y
, int width
, int height
);
120 int (*getDrawableMSC
)(struct glx_screen
*psc
, __GLXDRIdrawable
*pdraw
,
121 int64_t *ust
, int64_t *msc
, int64_t *sbc
);
122 int (*waitForMSC
)(__GLXDRIdrawable
*pdraw
, int64_t target_msc
,
123 int64_t divisor
, int64_t remainder
, int64_t *ust
,
124 int64_t *msc
, int64_t *sbc
);
125 int (*waitForSBC
)(__GLXDRIdrawable
*pdraw
, int64_t target_sbc
, int64_t *ust
,
126 int64_t *msc
, int64_t *sbc
);
127 int (*setSwapInterval
)(__GLXDRIdrawable
*pdraw
, int interval
);
128 int (*getSwapInterval
)(__GLXDRIdrawable
*pdraw
);
131 struct __GLXDRIdrawableRec
133 void (*destroyDrawable
) (__GLXDRIdrawable
* drawable
);
137 struct glx_screen
*psc
;
138 GLenum textureTarget
;
139 GLenum textureFormat
; /* EXT_texture_from_pixmap support */
140 unsigned long eventMask
;
144 ** Function to create and DRI display data and initialize the display
145 ** dependent methods.
147 extern __GLXDRIdisplay
*driswCreateDisplay(Display
* dpy
);
148 extern __GLXDRIdisplay
*driCreateDisplay(Display
* dpy
);
149 extern __GLXDRIdisplay
*dri2CreateDisplay(Display
* dpy
);
150 extern void dri2InvalidateBuffers(Display
*dpy
, XID drawable
);
151 extern unsigned dri2GetSwapEventType(Display
*dpy
, XID drawable
);
155 ** Functions to obtain driver configuration information from a direct
156 ** rendering client application
158 extern const char *glXGetScreenDriver(Display
* dpy
, int scrNum
);
160 extern const char *glXGetDriverConfig(const char *driverName
);
164 /************************************************************************/
166 #define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
168 typedef struct __GLXpixelStoreModeRec
170 GLboolean swapEndian
;
179 } __GLXpixelStoreMode
;
182 typedef struct __GLXattributeRec
187 * Pixel storage state. Most of the pixel store mode state is kept
188 * here and used by the client code to manage the packing and
189 * unpacking of data sent to/received from the server.
191 __GLXpixelStoreMode storePack
, storeUnpack
;
194 * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
197 GLboolean NoDrawArraysProtocol
;
200 * Vertex Array storage state. The vertex array component
201 * state is stored here and is used to manage the packing of
202 * DrawArrays data sent to the server.
204 struct array_state_vector
*array_state
;
207 typedef struct __GLXattributeMachineRec
209 __GLXattribute
*stack
[__GL_CLIENT_ATTRIB_STACK_DEPTH
];
210 __GLXattribute
**stackPointer
;
211 } __GLXattributeMachine
;
213 struct glx_context_vtable
{
214 void (*destroy
)(struct glx_context
*ctx
);
215 int (*bind
)(struct glx_context
*context
, struct glx_context
*old
,
216 GLXDrawable draw
, GLXDrawable read
);
217 void (*unbind
)(struct glx_context
*context
, struct glx_context
*new);
218 void (*wait_gl
)(struct glx_context
*ctx
);
219 void (*wait_x
)(struct glx_context
*ctx
);
220 void (*use_x_font
)(struct glx_context
*ctx
,
221 Font font
, int first
, int count
, int listBase
);
222 void (*bind_tex_image
)(Display
* dpy
,
223 GLXDrawable drawable
,
224 int buffer
, const int *attrib_list
);
225 void (*release_tex_image
)(Display
* dpy
, GLXDrawable drawable
, int buffer
);
230 glx_send_destroy_context(Display
*dpy
, XID xid
);
233 * GLX state that needs to be kept on the client. One of these records
234 * exist for each context that has been made current by this client.
239 * \name Drawing command buffer.
241 * Drawing commands are packed into this buffer before being sent as a
242 * single GLX protocol request. The buffer is sent when it overflows or
243 * is flushed by \c __glXFlushRenderBuffer. \c pc is the next location
244 * in the buffer to be filled. \c limit is described above in the buffer
247 * Commands that require large amounts of data to be transfered will
248 * also use this buffer to hold a header that describes the large
251 * These must be the first 6 fields since they are static initialized
252 * in the dummy context in glxext.c
262 const struct glx_context_vtable
*vtable
;
265 * The XID of this rendering context. When the context is created a
266 * new XID is allocated. This is set to None when the context is
267 * destroyed but is still current to some thread. In this case the
268 * context will be freed on next MakeCurrent.
273 * The XID of the \c shareList context.
281 struct glx_screen
*psc
;
284 * \c GL_TRUE if the context was created with ImportContext, which
285 * means the server-side context was created by another X client.
290 * The context tag returned by MakeCurrent when this context is made
291 * current. This tag is used to identify the context that a thread has
292 * current so that proper server context management can be done. It is
293 * used for all context specific commands (i.e., \c Render, \c RenderLarge,
294 * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
297 GLXContextTag currentContextTag
;
300 * \name Rendering mode
302 * The rendering mode is kept on the client as well as the server.
303 * When \c glRenderMode is called, the buffer associated with the
304 * previous rendering mode (feedback or select) is filled.
308 GLfloat
*feedbackBuf
;
313 * Fill newImage with the unpacked form of \c oldImage getting it
314 * ready for transport to the server.
316 void (*fillImage
) (struct glx_context
*, GLint
, GLint
, GLint
, GLint
, GLenum
,
317 GLenum
, const GLvoid
*, GLubyte
*, GLubyte
*);
320 * Client side attribs.
322 __GLXattributeMachine attributes
;
325 * Client side error code. This is set when client side gl API
326 * routines need to set an error because of a bad enumerant or
327 * running out of memory, etc.
332 * Whether this context does direct rendering.
337 * \c dpy of current display for this context. Will be \c NULL if not
338 * current to any display, or if this is the "dummy context".
343 * The current drawable for this context. Will be None if this
344 * context is not current to any drawable. currentReadable is below.
346 GLXDrawable currentDrawable
;
349 * \name GL Constant Strings
351 * Constant strings that describe the server implementation
352 * These pertain to GL attributes, not to be confused with
353 * GLX versioning attributes.
363 * Maximum small render command size. This is the smaller of 64k and
364 * the size of the above buffer.
366 GLint maxSmallRenderCommandSize
;
369 * Major opcode for the extension. Copied here so a lookup isn't
375 * Pointer to the config used to create this context.
377 struct glx_config
*config
;
380 * The current read-drawable for this context. Will be None if this
381 * context is not current to any drawable.
383 * \since Internal API version 20030606.
385 GLXDrawable currentReadable
;
388 * Pointer to client-state data that is private to libGL. This is only
389 * used for indirect rendering contexts.
391 * No internal API version change was made for this change. Client-side
392 * drivers should NEVER use this data or even care that it exists.
394 void *client_state_private
;
397 * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
402 * \name Raw server GL version
404 * True core GL version supported by the server. This is the raw value
405 * returned by the server, and it may not reflect what is actually
406 * supported (or reported) by the client-side library.
409 int server_major
; /**< Major version number. */
410 int server_minor
; /**< Minor version number. */
414 * Number of threads we're currently current in.
416 unsigned long thread_refcount
;
418 char gl_extension_bits
[__GL_EXT_BYTES
];
422 glx_context_init(struct glx_context
*gc
,
423 struct glx_screen
*psc
, struct glx_config
*fbconfig
);
425 #define __glXSetError(gc,code) \
426 if (!(gc)->error) { \
427 (gc)->error = code; \
430 extern void __glFreeAttributeState(struct glx_context
*);
432 /************************************************************************/
435 * The size of the largest drawing command known to the implementation
436 * that will use the GLXRender GLX command. In this case it is
437 * \c glPolygonStipple.
439 #define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
442 * To keep the implementation fast, the code uses a "limit" pointer
443 * to determine when the drawing command buffer is too full to hold
444 * another fixed size command. This constant defines the amount of
445 * space that must always be available in the drawing command buffer
446 * at all times for the implementation to work. It is important that
447 * the number be just large enough, but not so large as to reduce the
448 * efficacy of the buffer. The "+32" is just to keep the code working
449 * in case somebody counts wrong.
451 #define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
454 * This implementation uses a smaller threshold for switching
455 * to the RenderLarge protocol than the protcol requires so that
456 * large copies don't occur.
458 #define __GLX_RENDER_CMD_SIZE_LIMIT 4096
461 * One of these records exists per screen of the display. It contains
462 * a pointer to the config data for that screen (if the screen supports GL).
464 struct glx_screen_vtable
{
465 struct glx_context
*(*create_context
)(struct glx_screen
*psc
,
466 struct glx_config
*config
,
467 struct glx_context
*shareList
,
473 const struct glx_screen_vtable
*vtable
;
476 * GLX extension string reported by the X-server.
478 const char *serverGLXexts
;
481 * GLX extension string to be reported to applications. This is the
482 * set of extensions that the application can actually use.
484 char *effectiveGLXexts
;
486 struct glx_display
*display
;
491 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
493 * Per screen direct rendering interface functions and data.
495 __GLXDRIscreen
*driScreen
;
499 * Linked list of glx visuals and fbconfigs for this screen.
501 struct glx_config
*visuals
, *configs
;
504 * Per-screen dynamic GLX extension tracking. The \c direct_support
505 * field only contains enough bits for 64 extensions. Should libGL
506 * ever need to track more than 64 GLX extensions, we can safely grow
507 * this field. The \c struct glx_screen structure is not used outside
511 unsigned char direct_support
[8];
512 GLboolean ext_list_first_time
;
518 * Per display private data. One of these records exists for each display
519 * that is using the OpenGL (GLX) extension.
523 /* The extension protocol codes */
525 struct glx_display
*next
;
528 * Back pointer to the display
533 * The \c majorOpcode is common to all connections to the same server.
534 * It is also copied into the context structure.
539 * \name Server Version
541 * Major and minor version returned by the server during initialization.
544 int majorVersion
, minorVersion
;
548 * \name Storage for the servers GLX vendor and versions strings.
550 * These are the same for all screens on this display. These fields will
551 * be filled in on demand.
554 const char *serverGLXvendor
;
555 const char *serverGLXversion
;
559 * Configurations of visuals for all screens on this display.
560 * Also, per screen data which now includes the server \c GLX_EXTENSION
563 struct glx_screen
**screens
;
565 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
566 __glxHashTable
*drawHash
;
569 * Per display direct rendering interface functions and data.
571 __GLXDRIdisplay
*driswDisplay
;
572 __GLXDRIdisplay
*driDisplay
;
573 __GLXDRIdisplay
*dri2Display
;
578 glx_screen_init(struct glx_screen
*psc
,
579 int screen
, struct glx_display
* priv
);
581 glx_screen_cleanup(struct glx_screen
*psc
);
583 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
584 extern __GLXDRIdrawable
*
585 dri2GetGlxDrawableFromXDrawableId(Display
*dpy
, XID id
);
588 extern GLubyte
*__glXFlushRenderBuffer(struct glx_context
*, GLubyte
*);
590 extern void __glXSendLargeChunk(struct glx_context
* gc
, GLint requestNumber
,
592 const GLvoid
* data
, GLint dataLen
);
594 extern void __glXSendLargeCommand(struct glx_context
*, const GLvoid
*, GLint
,
595 const GLvoid
*, GLint
);
597 /* Initialize the GLX extension for dpy */
598 extern struct glx_display
*__glXInitialize(Display
*);
600 extern void __glXPreferEGL(int state
);
602 /************************************************************************/
604 extern int __glXDebug
;
606 /* This is per-thread storage in an MT environment */
607 #if defined( PTHREADS )
609 extern void __glXSetCurrentContext(struct glx_context
* c
);
611 # if defined( GLX_USE_TLS )
613 extern __thread
void *__glX_tls_Context
614 __attribute__ ((tls_model("initial-exec")));
616 # define __glXGetCurrentContext() __glX_tls_Context
620 extern struct glx_context
*__glXGetCurrentContext(void);
622 # endif /* defined( GLX_USE_TLS ) */
626 extern struct glx_context
*__glXcurrentContext
;
627 #define __glXGetCurrentContext() __glXcurrentContext
628 #define __glXSetCurrentContext(gc) __glXcurrentContext = gc
630 #endif /* defined( PTHREADS ) */
632 extern void __glXSetCurrentContextNull(void);
636 ** Global lock for all threads in this address space using the GLX
639 #if defined( PTHREADS )
640 extern pthread_mutex_t __glXmutex
;
641 #define __glXLock() pthread_mutex_lock(&__glXmutex)
642 #define __glXUnlock() pthread_mutex_unlock(&__glXmutex)
645 #define __glXUnlock()
649 ** Setup for a command. Initialize the extension for dpy if necessary.
651 extern CARD8
__glXSetupForCommand(Display
* dpy
);
653 /************************************************************************/
656 ** Data conversion and packing support.
659 extern const GLuint __glXDefaultPixelStore
[9];
661 /* Send an image to the server using RenderLarge. */
662 extern void __glXSendLargeImage(struct glx_context
* gc
, GLint compsize
, GLint dim
,
663 GLint width
, GLint height
, GLint depth
,
664 GLenum format
, GLenum type
,
665 const GLvoid
* src
, GLubyte
* pc
,
668 /* Return the size, in bytes, of some pixel data */
669 extern GLint
__glImageSize(GLint
, GLint
, GLint
, GLenum
, GLenum
, GLenum
);
671 /* Return the number of elements per group of a specified format*/
672 extern GLint
__glElementsPerGroup(GLenum format
, GLenum type
);
674 /* Return the number of bytes per element, based on the element type (other
677 extern GLint
__glBytesPerElement(GLenum type
);
680 ** Fill the transport buffer with the data from the users buffer,
681 ** applying some of the pixel store modes (unpack modes) to the data
682 ** first. As a side effect of this call, the "modes" field is
683 ** updated to contain the modes needed by the server to decode the
686 extern void __glFillImage(struct glx_context
*, GLint
, GLint
, GLint
, GLint
, GLenum
,
687 GLenum
, const GLvoid
*, GLubyte
*, GLubyte
*);
689 /* Copy map data with a stride into a packed buffer */
690 extern void __glFillMap1f(GLint
, GLint
, GLint
, const GLfloat
*, GLubyte
*);
691 extern void __glFillMap1d(GLint
, GLint
, GLint
, const GLdouble
*, GLubyte
*);
692 extern void __glFillMap2f(GLint
, GLint
, GLint
, GLint
, GLint
,
693 const GLfloat
*, GLfloat
*);
694 extern void __glFillMap2d(GLint
, GLint
, GLint
, GLint
, GLint
,
695 const GLdouble
*, GLdouble
*);
698 ** Empty an image out of the reply buffer into the clients memory applying
699 ** the pack modes to pack back into the clients requested format.
701 extern void __glEmptyImage(struct glx_context
*, GLint
, GLint
, GLint
, GLint
, GLenum
,
702 GLenum
, const GLubyte
*, GLvoid
*);
706 ** Allocate and Initialize Vertex Array client state, and free.
708 extern void __glXInitVertexArrayState(struct glx_context
*);
709 extern void __glXFreeVertexArrayState(struct glx_context
*);
712 ** Inform the Server of the major and minor numbers and of the client
713 ** libraries extension string.
715 extern void __glXClientInfo(Display
* dpy
, int opcode
);
717 /************************************************************************/
720 ** Declarations that should be in Xlib
722 #ifdef __GL_USE_OUR_PROTOTYPES
723 extern void _XFlush(Display
*);
724 extern Status
_XReply(Display
*, xReply
*, int, Bool
);
725 extern void _XRead(Display
*, void *, long);
726 extern void _XSend(Display
*, const void *, long);
730 extern void __glXInitializeVisualConfigFromTags(struct glx_config
* config
,
731 int count
, const INT32
* bp
,
733 Bool fbconfig_style_tags
);
735 extern char *__glXQueryServerString(Display
* dpy
, int opcode
,
736 CARD32 screen
, CARD32 name
);
737 extern char *__glXGetString(Display
* dpy
, int opcode
,
738 CARD32 screen
, CARD32 name
);
740 extern char *__glXstrdup(const char *str
);
743 extern const char __glXGLClientVersion
[];
744 extern const char __glXGLClientExtensions
[];
746 /* Get the unadjusted system time */
747 extern int __glXGetUST(int64_t * ust
);
749 extern GLboolean
__glXGetMscRateOML(Display
* dpy
, GLXDrawable drawable
,
751 int32_t * denominator
);
753 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
755 __glxGetMscRate(__GLXDRIdrawable
*glxDraw
,
756 int32_t * numerator
, int32_t * denominator
);
758 /* So that dri2.c:DRI2WireToEvent() can access
759 * glx_info->codes->first_event */
760 XExtDisplayInfo
*__glXFindDisplay (Display
*dpy
);
763 GarbageCollectDRIDrawables(struct glx_screen
*psc
);
765 extern __GLXDRIdrawable
*
766 GetGLXDRIDrawable(Display
*dpy
, GLXDrawable drawable
);
770 extern struct glx_context dummyContext
;
772 extern struct glx_screen
*
773 indirect_create_screen(int screen
, struct glx_display
* priv
);
774 extern struct glx_context
*
775 indirect_create_context(struct glx_screen
*psc
,
776 struct glx_config
*mode
,
777 struct glx_context
*shareList
, int renderType
);
779 #endif /* !__GLX_client_h__ */