/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef XMESAP_H
#define XMESAP_H
#include "xmesa.h"
#include "main/mtypes.h"
#include "swrast/s_context.h"
extern _glthread_Mutex _xmesa_lock;
extern XMesaBuffer XMesaBufferList;
/* for PF_8R8G8B24 pixel format */
typedef struct {
GLubyte b;
GLubyte g;
GLubyte r;
} bgr_t;
struct xmesa_renderbuffer;
/* Function pointer for clearing color buffers */
typedef void (*ClearFunc)( struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
GLint x, GLint y, GLint width, GLint height );
/** Framebuffer pixel formats */
enum pixel_format {
PF_Truecolor, /**< TrueColor or DirectColor, any depth */
PF_Dither_True, /**< TrueColor with dithering */
PF_8A8R8G8B, /**< 32-bit TrueColor: 8-A, 8-R, 8-G, 8-B bits */
PF_8A8B8G8R, /**< 32-bit TrueColor: 8-A, 8-B, 8-G, 8-R bits */
PF_8R8G8B, /**< 32-bit TrueColor: 8-R, 8-G, 8-B bits */
PF_8R8G8B24, /**< 24-bit TrueColor: 8-R, 8-G, 8-B bits */
PF_5R6G5B, /**< 16-bit TrueColor: 5-R, 6-G, 5-B bits */
PF_Dither_5R6G5B /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
};
/**
* Visual inforation, derived from struct gl_config.
* Basically corresponds to an XVisualInfo.
*/
struct xmesa_visual {
struct gl_config mesa_visual; /* Device independent visual parameters */
XMesaDisplay *display; /* The X11 display */
int screen, visualID;
int visualType;
XMesaVisualInfo visinfo; /* X's visual info (pointer to private copy) */
XVisualInfo *vishandle; /* Only used in fakeglx.c */
GLint BitsPerPixel; /* True bits per pixel for XImages */
GLboolean ximage_flag; /* Use XImage for back buffer (not pixmap)? */
enum pixel_format dithered_pf; /* Pixel format when dithering */
enum pixel_format undithered_pf;/* Pixel format when not dithering */
GLfloat RedGamma; /* Gamma values, 1.0 is default */
GLfloat GreenGamma;
GLfloat BlueGamma;
/* For PF_TRUECOLOR */
GLint rshift, gshift, bshift;/* Pixel color component shifts */
GLubyte Kernel[16]; /* Dither kernel */
unsigned long RtoPixel[512]; /* RGB to pixel conversion */
unsigned long GtoPixel[512];
unsigned long BtoPixel[512];
GLubyte PixelToR[256]; /* Pixel to RGB conversion */
GLubyte PixelToG[256];
GLubyte PixelToB[256];
};
/**
* Context info, derived from struct gl_context.
* Basically corresponds to a GLXContext.
*/
struct xmesa_context {
struct gl_context mesa; /* the core library context (containment) */
XMesaVisual xm_visual; /* Describes the buffers */
XMesaBuffer xm_buffer; /* current span/point/line/triangle buffer */
XMesaDisplay *display; /* == xm_visual->display */
GLboolean swapbytes; /* Host byte order != display byte order? */
GLboolean direct; /* Direct rendering context? */
enum pixel_format pixelformat;
GLubyte clearcolor[4]; /* current clearing color */
unsigned long clearpixel; /* current clearing pixel value */
};
/**
* Types of X/GLX drawables we might render into.
*/
typedef enum {
WINDOW, /* An X window */
GLXWINDOW, /* GLX window */
PIXMAP, /* GLX pixmap */
PBUFFER /* GLX Pbuffer */
} BufferType;
/** Values for db_mode: */
/*@{*/
#define BACK_PIXMAP 1
#define BACK_XIMAGE 2
/*@}*/
/**
* An xmesa_renderbuffer represents the back or front color buffer.
* For the front color buffer:
* <drawable> is the X window
* For the back color buffer:
* Either <ximage> or <pixmap> will be used, never both.
* In any case, <drawable> always equals <pixmap>.
* For stand-alone Mesa, we could merge <drawable> and <pixmap> into one
* field. We don't do that for the server-side GLcore module because
* pixmaps and drawables are different and we'd need a bunch of casts.
*/
struct xmesa_renderbuffer
{
struct swrast_renderbuffer Base; /* Base class */
XMesaBuffer Parent; /**< The XMesaBuffer this renderbuffer belongs to */
XMesaDrawable drawable; /* Usually the X window ID */
XMesaPixmap pixmap; /* Back color buffer */
XMesaImage *ximage; /* The back buffer, if not using a Pixmap */
GLushort *origin2; /* used for PIXEL_ADDR2 macro */
GLint width2;
GLubyte *origin3; /* used for PIXEL_ADDR3 macro */
GLint width3;
GLuint *origin4; /* used for PIXEL_ADDR4 macro */
GLint width4;
GLint bottom; /* used for FLIP macro, equals height - 1 */
ClearFunc clearFunc;
GLuint map_x, map_y, map_w, map_h;
GLbitfield map_mode;
XMesaImage *map_ximage;
};
/**
* Framebuffer information, derived from.
* Basically corresponds to a GLXDrawable.
*/
struct xmesa_buffer {
struct gl_framebuffer mesa_buffer; /* depth, stencil, accum, etc buffers */
/* This MUST BE FIRST! */
GLboolean wasCurrent; /* was ever the current buffer? */
XMesaVisual xm_visual; /* the X/Mesa visual */
XMesaDisplay *display;
BufferType type; /* window, pixmap, pbuffer or glxwindow */
GLboolean largestPbuffer; /**< for pbuffers */
GLboolean preservedContents; /**< for pbuffers */
struct xmesa_renderbuffer *frontxrb; /* front color renderbuffer */
struct xmesa_renderbuffer *backxrb; /* back color renderbuffer */
XMesaColormap cmap; /* the X colormap */
unsigned long selectedEvents;/* for pbuffers only */
GLint db_mode; /* 0 = single buffered */
/* BACK_PIXMAP = use Pixmap for back buffer */
/* BACK_XIMAGE = use XImage for back buffer */
GLuint shm; /* X Shared Memory extension status: */
/* 0 = not available */
/* 1 = XImage support available */
/* 2 = Pixmap support available too */
#if defined(USE_XSHM)
XShmSegmentInfo shminfo;
#endif
// XMesaImage *rowimage; /* Used for optimized span writing */
XMesaPixmap stipple_pixmap; /* For polygon stippling */
XMesaGC stipple_gc; /* For polygon stippling */
XMesaGC gc; /* scratch GC for span, line, tri drawing */
XMesaGC cleargc; /* GC for clearing the color buffer */
XMesaGC swapgc; /* GC for swapping the color buffers */
/* The following are here instead of in the XMesaVisual
* because they depend on the window's colormap.
*/
/* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
unsigned long color_table[576]; /* RGB -> pixel value */
/* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
GLubyte pixel_to_r[65536]; /* pixel value -> red */
GLubyte pixel_to_g[65536]; /* pixel value -> green */
GLubyte pixel_to_b[65536]; /* pixel value -> blue */
/* Used to do XAllocColor/XFreeColors accounting: */
int num_alloced;
unsigned long alloced_colors[256];
/* GLX_EXT_texture_from_pixmap */
GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
GLint TextureMipmap; /** 0 or 1 */
struct xmesa_buffer *Next; /* Linked list pointer: */
};
/**
* If pixelformat==PF_TRUECOLOR:
*/
#define PACK_TRUECOLOR( PIXEL, R, G, B ) \
PIXEL = xmesa->xm_visual->RtoPixel[R] \
| xmesa->xm_visual->GtoPixel[G] \
| xmesa->xm_visual->BtoPixel[B]; \
/**
* If pixelformat==PF_TRUEDITHER:
*/
#define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B ) \
{ \
int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)]; \
PIXEL = xmesa->xm_visual->RtoPixel[(R)+d] \
| xmesa->xm_visual->GtoPixel[(G)+d] \
| xmesa->xm_visual->BtoPixel[(B)+d]; \
}
/**
* If pixelformat==PF_8A8B8G8R:
*/
#define PACK_8A8B8G8R( R, G, B, A ) \
( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
/**
* Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable
* shortcut.
*/
#define PACK_8B8G8R( R, G, B ) ( ((B) << 16) | ((G) << 8) | (R) )
/**
* If pixelformat==PF_8R8G8B:
*/
#define PACK_8R8G8B( R, G, B) ( ((R) << 16) | ((G) << 8) | (B) )
/**
* If pixelformat==PF_5R6G5B:
*/
#define PACK_5R6G5B( R, G, B) ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
/**
* If pixelformat==PF_8A8R8G8B:
*/
#define PACK_8A8R8G8B( R, G, B, A ) \
( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
/**
* Converts a GL window Y coord to an X window Y coord:
*/
#define YFLIP(XRB, Y) ((XRB)->bottom - (Y))
/**
* Return the address of a 2, 3 or 4-byte pixel in the buffer's XImage:
* X==0 is left, Y==0 is bottom.
*/
#define PIXEL_ADDR2(XRB, X, Y) \
( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
#define PIXEL_ADDR3(XRB, X, Y) \
( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
#define PIXEL_ADDR4(XRB, X, Y) \
( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
/*
* External functions:
*/
extern struct xmesa_renderbuffer *
xmesa_new_renderbuffer(struct gl_context *ctx, GLuint name,
const struct xmesa_visual *xmvis,
GLboolean backBuffer);
extern void
xmesa_delete_framebuffer(struct gl_framebuffer *fb);
extern XMesaBuffer
xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis);
extern unsigned long
xmesa_color_to_pixel( struct gl_context *ctx,
GLubyte r, GLubyte g, GLubyte b, GLubyte a,
GLuint pixelFormat );
extern void
xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
GLuint *width, GLuint *height);
extern void
xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer);
extern void
xmesa_init_driver_functions( XMesaVisual xmvisual,
struct dd_function_table *driver );
extern void
xmesa_update_state( struct gl_context *ctx, GLbitfield new_state );
extern void
xmesa_MapRenderbuffer(struct gl_context *ctx,
struct gl_renderbuffer *rb,
GLuint x, GLuint y, GLuint w, GLuint h,
GLbitfield mode,
GLubyte **mapOut, GLint *rowStrideOut);
extern void
xmesa_UnmapRenderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb);
extern void
xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
/**
* Using a function instead of an ordinary cast is safer.
*/
static INLINE struct xmesa_renderbuffer *
xmesa_renderbuffer(struct gl_renderbuffer *rb)
{
return (struct xmesa_renderbuffer *) rb;
}
/**
* Return pointer to XMesaContext corresponding to a Mesa struct gl_context.
* Since we're using structure containment, it's just a cast!.
*/
static INLINE XMesaContext
XMESA_CONTEXT(struct gl_context *ctx)
{
return (XMesaContext) ctx;
}
/**
* Return pointer to XMesaBuffer corresponding to a Mesa struct gl_framebuffer.
* Since we're using structure containment, it's just a cast!.
*/
static INLINE XMesaBuffer
XMESA_BUFFER(struct gl_framebuffer *b)
{
return (XMesaBuffer) b;
}
/* Plugged into the software rasterizer. Try to use internal
* swrast-style point, line and triangle functions.
*/
extern void xmesa_choose_point( struct gl_context *ctx );
extern void xmesa_choose_line( struct gl_context *ctx );
extern void xmesa_choose_triangle( struct gl_context *ctx );
extern void xmesa_register_swrast_functions( struct gl_context *ctx );
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
#else
#define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */
#endif
#define TEST_META_FUNCS 0
#endif