/* * Mesa 3-D graphics library * Version: 7.1 * * 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 * BRIAN PAUL 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" #if defined(FX) #include "GL/fxmesa.h" #include "xm_glide.h" #endif #ifdef XFree86Server #include "xm_image.h" #endif 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)( GLcontext *ctx, struct xmesa_renderbuffer *xrb, GLint x, GLint y, GLint width, GLint height ); /** Framebuffer pixel formats */ enum pixel_format { PF_Index, /**< Color Index mode */ 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, /**< Color-mapped RGB with dither */ PF_Lookup, /**< Color-mapped RGB without dither */ PF_HPCR, /**< HP Color Recovery (ad@lms.be 30/08/95) */ PF_1Bit, /**< monochrome dithering of RGB */ PF_Grayscale, /**< Grayscale or StaticGray */ PF_Dither_5R6G5B /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */ }; /** * Visual inforation, derived from GLvisual. * Basically corresponds to an XVisualInfo. */ struct xmesa_visual { GLvisual mesa_visual; /* Device independent visual parameters */ XMesaDisplay *display; /* The X11 display */ #ifdef XFree86Server GLint ColormapEntries; GLint nplanes; #else XMesaVisualInfo visinfo; /* X's visual info (pointer to private copy) */ XVisualInfo *vishandle; /* Only used in fakeglx.c */ #endif 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]; /* For PF_HPCR */ short hpcr_rgbTbl[3][256]; GLboolean hpcr_clear_flag; GLubyte hpcr_clear_ximage_pattern[2][16]; XMesaImage *hpcr_clear_ximage; XMesaPixmap hpcr_clear_pixmap; /* For PF_1BIT */ int bitFlip; }; /** * Context info, derived from GLcontext. * Basically corresponds to a GLXContext. */ struct xmesa_context { GLcontext 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: * is the X window * For the back color buffer: * Either or will be used, never both. * In any case, always equals . * For stand-alone Mesa, we could merge and 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 gl_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 */ GLubyte *origin1; /* used for PIXEL_ADDR1 macro */ GLint width1; 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; }; /** * Framebuffer information, derived from. * Basically corresponds to a GLXDrawable. */ struct xmesa_buffer { GLframebuffer 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 */ 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 */ GLboolean swAlpha; GLuint shm; /* X Shared Memory extension status: */ /* 0 = not available */ /* 1 = XImage support available */ /* 2 = Pixmap support available too */ #if defined(USE_XSHM) && !defined(XFree86Server) 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; #if defined(XFree86Server) Pixel alloced_colors[256]; #else unsigned long alloced_colors[256]; #endif #if defined( FX ) /* For 3Dfx Glide only */ GLboolean FXisHackUsable; /* Can we render into window? */ GLboolean FXwindowHack; /* Are we rendering into a window? */ fxMesaContext FXctx; #endif /* 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) ) /** * If pixelformat==PF_DITHER: * * Improved 8-bit RGB dithering code contributed by Bob Mercier * (mercier@hollywood.cinenet.net). Thanks Bob! */ #ifdef DITHER666 # define DITH_R 6 # define DITH_G 6 # define DITH_B 6 # define DITH_MIX(r,g,b) (((r) * DITH_G + (g)) * DITH_B + (b)) #else # define DITH_R 5 # define DITH_G 9 # define DITH_B 5 # define DITH_MIX(r,g,b) (((g) << 6) | ((b) << 3) | (r)) #endif #define DITH_DX 4 #define DITH_DY 4 #define DITH_N (DITH_DX * DITH_DY) #define _dither(C, c, d) (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12) #define MAXC 256 extern const int xmesa_kernel8[DITH_DY * DITH_DX]; /* Dither for random X,Y */ #define DITHER_SETUP \ int __d; \ unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; #define DITHER( X, Y, R, G, B ) \ (__d = xmesa_kernel8[(((Y)&3)<<2) | ((X)&3)], \ ctable[DITH_MIX(_dither(DITH_R, (R), __d), \ _dither(DITH_G, (G), __d), \ _dither(DITH_B, (B), __d))]) /* Dither for random X, fixed Y */ #define XDITHER_SETUP(Y) \ int __d; \ unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \ const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ]; #define XDITHER( X, R, G, B ) \ (__d = kernel[(X)&3], \ ctable[DITH_MIX(_dither(DITH_R, (R), __d), \ _dither(DITH_G, (G), __d), \ _dither(DITH_B, (B), __d))]) /* * Dithering for flat-shaded triangles. Precompute all 16 possible * pixel values given the triangle's RGB color. Contributed by Martin Shenk. */ #define FLAT_DITHER_SETUP( R, G, B ) \ GLushort ditherValues[16]; \ { \ unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table; \ int msdr = (DITH_N*((DITH_R)-1)+1) * (R); \ int msdg = (DITH_N*((DITH_G)-1)+1) * (G); \ int msdb = (DITH_N*((DITH_B)-1)+1) * (B); \ int i; \ for (i=0;i<16;i++) { \ int k = xmesa_kernel8[i]; \ int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\ ditherValues[i] = (GLushort) ctable[j]; \ } \ } #define FLAT_DITHER_ROW_SETUP(Y) \ GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2); #define FLAT_DITHER(X) ditherRow[(X)&3] /** * If pixelformat==PF_LOOKUP: */ #define _dither_lookup(C, c) (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12) #define LOOKUP_SETUP \ unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table #define LOOKUP( R, G, B ) \ ctable[DITH_MIX(_dither_lookup(DITH_R, (R)), \ _dither_lookup(DITH_G, (G)), \ _dither_lookup(DITH_B, (B)))] /** * If pixelformat==PF_HPCR: * * HP Color Recovery dithering (ad@lms.be 30/08/95) * HP has on it's 8-bit 700-series computers, a feature called * 'Color Recovery'. This allows near 24-bit output (so they say). * It is enabled by selecting the 8-bit TrueColor visual AND * corresponding colormap (see tkInitWindow) AND doing some special * dither. */ extern const short xmesa_HPCR_DRGB[3][2][16]; #define DITHER_HPCR( X, Y, R, G, B ) \ ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0) \ |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \ | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6) \ ) /** * If pixelformat==PF_1BIT: */ extern const int xmesa_kernel1[16]; #define SETUP_1BIT int bitFlip = xmesa->xm_visual->bitFlip #define DITHER_1BIT( X, Y, R, G, B ) \ (( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip) /** * If pixelformat==PF_GRAYSCALE: */ #define GRAY_RGB( R, G, B ) XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3] /** * Converts a GL window Y coord to an X window Y coord: */ #define YFLIP(XRB, Y) ((XRB)->bottom - (Y)) /** * Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage: * X==0 is left, Y==0 is bottom. */ #define PIXEL_ADDR1(XRB, X, Y) \ ( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) ) #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(GLcontext *ctx, GLuint name, const GLvisual *visual, 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( GLcontext *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( GLcontext *ctx, GLbitfield new_state ); extern void xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer *xrb, enum pixel_format pixelformat, GLint depth); 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 GLcontext. * Since we're using structure containment, it's just a cast!. */ static INLINE XMesaContext XMESA_CONTEXT(GLcontext *ctx) { return (XMesaContext) ctx; } /** * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer. * Since we're using structure containment, it's just a cast!. */ static INLINE XMesaBuffer XMESA_BUFFER(GLframebuffer *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( GLcontext *ctx ); extern void xmesa_choose_line( GLcontext *ctx ); extern void xmesa_choose_triangle( GLcontext *ctx ); extern void xmesa_register_swrast_functions( GLcontext *ctx ); #define ENABLE_EXT_texure_compression_s3tc 0 /* SW texture compression */ #ifdef XFree86Server #define ENABLE_EXT_timer_query 0 #elif 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 #endif