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Diffstat (limited to 'include/GL/internal/glcore.h')
| -rw-r--r-- | include/GL/internal/glcore.h | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/include/GL/internal/glcore.h b/include/GL/internal/glcore.h new file mode 100644 index 0000000000..08de672195 --- /dev/null +++ b/include/GL/internal/glcore.h @@ -0,0 +1,397 @@ +#ifndef __gl_core_h_ +#define __gl_core_h_ + +/* $XFree86: xc/lib/GL/include/GL/internal/glcore.h,v 1.5 1999/06/14 07:23:42 dawes Exp $ */ +/* +** The contents of this file are subject to the GLX Public License Version 1.0 +** (the "License"). You may not use this file except in compliance with the +** License. You may obtain a copy of the License at Silicon Graphics, Inc., +** attn: Legal Services, 2011 N. Shoreline Blvd., Mountain View, CA 94043 +** or at http://www.sgi.com/software/opensource/glx/license.html. +** +** Software distributed under the License is distributed on an "AS IS" +** basis. ALL WARRANTIES ARE DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY +** IMPLIED WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR +** PURPOSE OR OF NON- INFRINGEMENT. See the License for the specific +** language governing rights and limitations under the License. +** +** The Original Software is GLX version 1.2 source code, released February, +** 1999. The developer of the Original Software is Silicon Graphics, Inc. +** Those portions of the Subject Software created by Silicon Graphics, Inc. +** are Copyright (c) 1991-9 Silicon Graphics, Inc. All Rights Reserved. +** +** $SGI$ +*/ + +#ifndef XFree86LOADER +#include <sys/types.h> +#endif + +#define GL_CORE_SGI 1 +#define GL_CORE_MESA 2 + +typedef struct __GLcontextRec __GLcontext; +typedef struct __GLinterfaceRec __GLinterface; + +/* +** This file defines the interface between the GL core and the surrounding +** "operating system" that supports it (currently the GLX or WGL extensions). +** +** Members (data and function pointers) are documented as imported or +** exported according to how they are used by the core rendering functions. +** Imported members are initialized by the "operating system" and used by +** the core functions. Exported members are initialized by the core functions +** and used by the "operating system". +*/ + +/* +** Mode and limit information for a context. This information is +** kept around in the context so that values can be used during +** command execution, and for returning information about the +** context to the application. +*/ +typedef struct __GLcontextModesRec { + GLboolean rgbMode; + GLboolean colorIndexMode; + GLboolean doubleBufferMode; + GLboolean stereoMode; + + GLboolean haveAccumBuffer; + GLboolean haveDepthBuffer; + GLboolean haveStencilBuffer; + + GLint redBits, greenBits, blueBits, alphaBits; /* bits per comp */ + GLuint redMask, greenMask, blueMask, alphaMask; + GLint rgbBits; /* total bits for rgb */ + GLint indexBits; /* total bits for colorindex */ + + GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits; + GLint depthBits; + GLint stencilBits; + + GLint numAuxBuffers; + + GLint level; + + GLint pixmapMode; +} __GLcontextModes; + +/************************************************************************/ + +/* +** Structure used for allocating and freeing drawable private memory. +** (like software buffers, for example). +** +** The memory allocation routines are provided by the surrounding +** "operating system" code, and they are to be used for allocating +** software buffers and things which are associated with the drawable, +** and used by any context which draws to that drawable. There are +** separate memory allocation functions for drawables and contexts +** since drawables and contexts can be created and destroyed independently +** of one another, and the "operating system" may want to use separate +** allocation arenas for each. +** +** The freePrivate function is filled in by the core routines when they +** allocates software buffers, and stick them in "private". The freePrivate +** function will destroy anything allocated to this drawable (to be called +** when the drawable is destroyed). +*/ +typedef struct __GLdrawableRegionRec __GLdrawableRegion; +typedef struct __GLdrawableBufferRec __GLdrawableBuffer; +typedef struct __GLdrawablePrivateRec __GLdrawablePrivate; + +typedef struct __GLregionRectRec { + /* lower left (inside the rectangle) */ + GLint x0, y0; + /* upper right (outside the rectangle) */ + GLint x1, y1; +} __GLregionRect; + +struct __GLdrawableRegionRec { + GLint numRects; + __GLregionRect *rects; + __GLregionRect boundingRect; +}; + +/************************************************************************/ + +/* masks for the buffers */ +#define __GL_FRONT_BUFFER_MASK 0x00000001 +#define __GL_FRONT_LEFT_BUFFER_MASK 0x00000001 +#define __GL_FRONT_RIGHT_BUFFER_MASK 0x00000002 +#define __GL_BACK_BUFFER_MASK 0x00000004 +#define __GL_BACK_LEFT_BUFFER_MASK 0x00000004 +#define __GL_BACK_RIGHT_BUFFER_MASK 0x00000008 +#define __GL_ACCUM_BUFFER_MASK 0x00000010 +#define __GL_DEPTH_BUFFER_MASK 0x00000020 +#define __GL_STENCIL_BUFFER_MASK 0x00000040 +#define __GL_AUX_BUFFER_MASK(i) (0x0000080 << (i)) + +#define __GL_ALL_BUFFER_MASK 0xffffffff + +/* what Resize routines return if resize resorted to fallback case */ +#define __GL_BUFFER_FALLBACK 0x10 + +typedef void (*__GLbufFallbackInitFn)(__GLdrawableBuffer *buf, + __GLdrawablePrivate *glPriv, GLint bits); +typedef void (*__GLbufMainInitFn)(__GLdrawableBuffer *buf, + __GLdrawablePrivate *glPriv, GLint bits, + __GLbufFallbackInitFn back); + +/* +** A drawable buffer +** +** This data structure describes the context side of a drawable. +** +** According to the spec there could be multiple contexts bound to the same +** drawable at the same time (from different threads). In order to avoid +** multiple-access conflicts, locks are used to serialize access. When a +** thread needs to access (read or write) a member of the drawable, it takes +** a lock first. Some of the entries in the drawable are treated "mostly +** constant", so we take the freedom of allowing access to them without +** taking a lock (for optimization reasons). +** +** For more details regarding locking, see buffers.h in the GL core +*/ +struct __GLdrawableBufferRec { + /* + ** Buffer dimensions + */ + GLint width, height, depth; + + /* + ** Framebuffer base address + */ + void *base; + + /* + ** Framebuffer size (in bytes) + */ + GLuint size; + + /* + ** Size (in bytes) of each element in the framebuffer + */ + GLuint elementSize; + GLuint elementSizeLog2; + + /* + ** Element skip from one scanline to the next. + ** If the buffer is part of another buffer (for example, fullscreen + ** front buffer), outerWidth is the width of that buffer. + */ + GLint outerWidth; + + /* + ** outerWidth * elementSize + */ + GLint byteWidth; + + /* + ** Allocation/deallocation is done based on this handle. A handle + ** is conceptually different from the framebuffer 'base'. + */ + void *handle; + + /* imported */ + GLboolean (*resize)(__GLdrawableBuffer *buf, + GLint x, GLint y, GLuint width, GLuint height, + __GLdrawablePrivate *glPriv, GLuint bufferMask); + void (*lock)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv); + void (*unlock)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv); + void (*fill)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv, + GLuint val, GLint x, GLint y, GLint w, GLint h); + void (*free)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv); + void *other; + + /* exported */ + void (*freePrivate)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv); + void *private; + + /* private */ + __GLbufMainInitFn mainInit; + __GLbufFallbackInitFn fallbackInit; +}; + +/* +** The context side of the drawable private +*/ +struct __GLdrawablePrivateRec { + /* + ** Drawable Modes + */ + __GLcontextModes *modes; + + /* + ** Drawable size + */ + GLuint width, height; + + /* + ** Origin in screen coordinates of the drawable + */ + GLint xOrigin, yOrigin; +#ifdef __GL_ALIGNED_BUFFERS + /* + ** Drawable offset from screen origin + */ + GLint xOffset, yOffset; + + /* + ** Alignment restriction + */ + GLint xAlignment, yAlignment; +#endif + /* + ** Should we invert the y axis? + */ + GLint yInverted; + + /* + ** Mask specifying which buffers are renderable by the hw + */ + GLuint accelBufferMask; + + /* + ** the buffers themselves + */ + __GLdrawableBuffer frontBuffer; + __GLdrawableBuffer backBuffer; + __GLdrawableBuffer accumBuffer; + __GLdrawableBuffer depthBuffer; + __GLdrawableBuffer stencilBuffer; +#if defined(__GL_NUMBER_OF_AUX_BUFFERS) && (__GL_NUMBER_OF_AUX_BUFFERS > 0) + __GLdrawableBuffer *auxBuffer; +#endif + + __GLdrawableRegion ownershipRegion; + + /* + ** Lock for the drawable private structure + */ + void *lock; +#ifdef DEBUG + /* lock debugging info */ + int lockRefCount; + int lockLine[10]; + char *lockFile[10]; +#endif + + /* imported */ + void *(*malloc)(size_t size); + void *(*calloc)(size_t numElem, size_t elemSize); + void *(*realloc)(void *oldAddr, size_t newSize); + void (*free)(void *addr); + + GLboolean (*addSwapRect)(__GLdrawablePrivate *glPriv, + GLint x, GLint y, GLsizei width, GLsizei height); + void (*setClipRect)(__GLdrawablePrivate *glPriv, + GLint x, GLint y, GLsizei width, GLsizei height); + void (*updateClipRegion)(__GLdrawablePrivate *glPriv); + GLboolean (*resize)(__GLdrawablePrivate *glPriv); + void (*getDrawableSize)(__GLdrawablePrivate *glPriv, + GLint *x, GLint *y, GLuint *width, GLuint *height); + + void (*lockDP)(__GLdrawablePrivate *glPriv, __GLcontext *gc); + void (*unlockDP)(__GLdrawablePrivate *glPriv); + + + void *other; + + /* exported */ + void (*freePrivate)(__GLdrawablePrivate *); + void *private; +}; + +/* +** Macros to lock/unlock the drawable private +*/ +#if defined(DEBUG) +#define __GL_LOCK_DP(glPriv,gc) \ + (*(glPriv)->lockDP)(glPriv,gc); \ + (glPriv)->lockLine[(glPriv)->lockRefCount] = __LINE__; \ + (glPriv)->lockFile[(glPriv)->lockRefCount] = __FILE__; \ + (glPriv)->lockRefCount++ +#define __GL_UNLOCK_DP(glPriv) \ + (glPriv)->lockRefCount--; \ + (glPriv)->lockLine[(glPriv)->lockRefCount] = 0; \ + (glPriv)->lockFile[(glPriv)->lockRefCount] = NULL; \ + (*(glPriv)->unlockDP)(glPriv) +#else /* DEBUG */ +#define __GL_LOCK_DP(glPriv,gc) (*(glPriv)->lockDP)(glPriv,gc) +#define __GL_UNLOCK_DP(glPriv) (*(glPriv)->unlockDP)(glPriv) +#endif /* DEBUG */ + + +/* +** Procedures which are imported by the GL from the surrounding +** "operating system". Math functions are not considered part of the +** "operating system". +*/ +typedef struct __GLimportsRec { + /* Memory management */ + void *(*malloc)(__GLcontext *gc, size_t size); + void *(*calloc)(__GLcontext *gc, size_t numElem, size_t elemSize); + void *(*realloc)(__GLcontext *gc, void *oldAddr, size_t newSize); + void (*free)(__GLcontext *gc, void *addr); + + /* Error handling */ + void (*warning)(__GLcontext *gc, char *fmt); + void (*fatal)(__GLcontext *gc, char *fmt); + + /* other system calls */ + char *(*getenv)(__GLcontext *gc, const char *var); + int (*sprintf)(__GLcontext *gc, char *str, const char *fmt, ...); + void *(*fopen)(__GLcontext *gc, const char *path, const char *mode); + int (*fclose)(__GLcontext *gc, void *stream); + int (*fprintf)(__GLcontext *gc, void *stream, const char *fmt, ...); + + /* Drawing surface management */ + __GLdrawablePrivate *(*getDrawablePrivate)(__GLcontext *gc); + + /* Operating system dependent data goes here */ + void *other; +} __GLimports; + +/************************************************************************/ + +/* +** Procedures which are exported by the GL to the surrounding "operating +** system" so that it can manage multiple GL context's. +*/ +typedef struct __GLexportsRec { + /* Context management (return GL_FALSE on failure) */ + GLboolean (*destroyContext)(__GLcontext *gc); + GLboolean (*loseCurrent)(__GLcontext *gc); + GLboolean (*makeCurrent)(__GLcontext *gc, __GLdrawablePrivate *glPriv); + GLboolean (*shareContext)(__GLcontext *gc, __GLcontext *gcShare); + GLboolean (*copyContext)(__GLcontext *dst, const __GLcontext *src, GLuint mask); + GLboolean (*forceCurrent)(__GLcontext *gc); + + /* Drawing surface notification callbacks */ + GLboolean (*notifyResize)(__GLcontext *gc); + void (*notifyDestroy)(__GLcontext *gc); + void (*notifySwapBuffers)(__GLcontext *gc); + + /* Dispatch table override control for external agents like libGLS */ + struct __GLdispatchStateRec* (*dispatchExec)(__GLcontext *gc); + void (*beginDispatchOverride)(__GLcontext *gc); + void (*endDispatchOverride)(__GLcontext *gc); +} __GLexports; + +/************************************************************************/ + +/* +** This must be the first member of a __GLcontext structure. This is the +** only part of a context that is exposed to the outside world; everything +** else is opaque. +*/ +struct __GLinterfaceRec { + __GLimports imports; + __GLexports exports; +}; + +extern __GLcontext *__glCoreCreateContext(__GLimports *, __GLcontextModes *); +extern void __glCoreNopDispatch(void); + +#endif /* __gl_core_h_ */ |