X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fswrast%2Fs_context.h;h=9d14c89bd601fcd270a94f3a768e0748d35c9bb5;hb=7576b9b19d433f90c7f9daae01888e7bfea7e7b9;hp=900c1907f6044f282be5a503e264410c375122c7;hpb=f595212336ae63c981f0f39f4ea1dec67ff7fe25;p=mesa.git diff --git a/src/mesa/swrast/s_context.h b/src/mesa/swrast/s_context.h index 900c1907f60..9d14c89bd60 100644 --- a/src/mesa/swrast/s_context.h +++ b/src/mesa/swrast/s_context.h @@ -1,10 +1,8 @@ -/* $Id: s_context.h,v 1.18 2002/05/02 00:59:20 brianp Exp $ */ - /* * Mesa 3-D graphics library - * Version: 4.1 + * Version: 6.1 * - * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2004 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"), @@ -22,15 +20,13 @@ * 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. - * - * Authors: - * Keith Whitwell */ + /** * \file swrast/s_context.h - * \brief fill in description - * \author Keith Whitwell + * \brief Software rasterization context and private types. + * \author Keith Whitwell */ #ifndef S_CONTEXT_H @@ -39,27 +35,177 @@ #include "mtypes.h" #include "swrast.h" -/* - * For texture sampling: + +/** + * \defgroup SpanFlags SPAN_XXX-flags + * Bitmasks to indicate which span_arrays need to be computed + * (sw_span::interpMask) or have already been filled + * (sw_span::arrayMask) */ -typedef void (*TextureSampleFunc)( GLcontext *ctx, GLuint texUnit, - const struct gl_texture_object *tObj, - GLuint n, GLfloat texcoords[][4], - const GLfloat lambda[], GLchan rgba[][4] ); +/*@{*/ +#define SPAN_RGBA 0x001 +#define SPAN_SPEC 0x002 +#define SPAN_INDEX 0x004 +#define SPAN_Z 0x008 +#define SPAN_W 0x010 +#define SPAN_FOG 0x020 +#define SPAN_TEXTURE 0x040 +#define SPAN_INT_TEXTURE 0x080 +#define SPAN_LAMBDA 0x100 +#define SPAN_COVERAGE 0x200 +#define SPAN_FLAT 0x400 /**< flat shading? */ +/** sw_span::arrayMask only - for span_arrays::x, span_arrays::y */ +#define SPAN_XY 0x800 +#define SPAN_MASK 0x1000 /**< sw_span::arrayMask only */ +/*@}*/ + +/** + * \struct span_arrays + * \brief Arrays of fragment values. + * + * These will either be computed from the x/xStep values above or + * filled in by glDraw/CopyPixels, etc. + * These arrays are separated out of sw_span to conserve memory. + */ +struct span_arrays { + GLchan rgb[MAX_WIDTH][3]; + GLchan rgba[MAX_WIDTH][4]; + GLuint index[MAX_WIDTH]; + GLchan spec[MAX_WIDTH][4]; /* specular color */ + GLint x[MAX_WIDTH]; /**< X/Y used for point/line rendering only */ + GLint y[MAX_WIDTH]; /**< X/Y used for point/line rendering only */ + GLdepth z[MAX_WIDTH]; + GLfloat fog[MAX_WIDTH]; + GLfloat texcoords[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH][4]; + GLfloat lambda[MAX_TEXTURE_COORD_UNITS][MAX_WIDTH]; + GLfloat coverage[MAX_WIDTH]; + + /** This mask indicates if fragment is alive or culled */ + GLubyte mask[MAX_WIDTH]; +}; -/* - * Blending function +/** + * \struct sw_span + * \brief Contains data for either a horizontal line or a set of + * pixels that are passed through a pipeline of functions before being + * drawn. + * + * The sw_span structure describes the colors, Z, fogcoord, texcoords, + * etc for either a horizontal run or an array of independent pixels. + * We can either specify a base/step to indicate interpolated values, or + * fill in arrays of values. The interpMask and arrayMask bitfields + * indicate which are active. + * + * With this structure it's easy to hand-off span rasterization to + * subroutines instead of doing it all inline in the triangle functions + * like we used to do. + * It also cleans up the local variable namespace a great deal. + * + * It would be interesting to experiment with multiprocessor rasterization + * with this structure. The triangle rasterizer could simply emit a + * stream of these structures which would be consumed by one or more + * span-processing threads which could run in parallel. */ -#ifdef USE_MMX_ASM +struct sw_span { + GLint x, y; + + /** Only need to process pixels between start <= i < end */ + /** At this time, start is always zero. */ + GLuint start, end; + + /** This flag indicates that mask[] array is effectively filled with ones */ + GLboolean writeAll; + + /** either GL_POLYGON, GL_LINE, GL_POLYGON, GL_BITMAP */ + GLenum primitive; + + /** 0 = front-facing span, 1 = back-facing span (for two-sided stencil) */ + GLuint facing; + + /** + * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates + * which of the x/xStep variables are relevant. + */ + GLuint interpMask; + + /* For horizontal spans, step is the partial derivative wrt X. + * For lines, step is the delta from one fragment to the next. + */ +#if CHAN_TYPE == GL_FLOAT + GLfloat red, redStep; + GLfloat green, greenStep; + GLfloat blue, blueStep; + GLfloat alpha, alphaStep; + GLfloat specRed, specRedStep; + GLfloat specGreen, specGreenStep; + GLfloat specBlue, specBlueStep; +#else /* CHAN_TYPE == GL_UNSIGNED_BYTE or GL_UNSIGNED_SHORT */ + GLfixed red, redStep; + GLfixed green, greenStep; + GLfixed blue, blueStep; + GLfixed alpha, alphaStep; + GLfixed specRed, specRedStep; + GLfixed specGreen, specGreenStep; + GLfixed specBlue, specBlueStep; +#endif + GLfixed index, indexStep; + GLfixed z, zStep; + GLfloat fog, fogStep; + GLfloat tex[MAX_TEXTURE_COORD_UNITS][4]; /* s, t, r, q */ + GLfloat texStepX[MAX_TEXTURE_COORD_UNITS][4]; + GLfloat texStepY[MAX_TEXTURE_COORD_UNITS][4]; + GLfixed intTex[2], intTexStep[2]; /* s, t only */ + + /* partial derivatives wrt X and Y. */ + GLfloat dzdx, dzdy; + GLfloat w, dwdx, dwdy; + GLfloat drdx, drdy; + GLfloat dgdx, dgdy; + GLfloat dbdx, dbdy; + GLfloat dadx, dady; + GLfloat dsrdx, dsrdy; + GLfloat dsgdx, dsgdy; + GLfloat dsbdx, dsbdy; + GLfloat dfogdx, dfogdy; + + /** + * This bitmask (of \link SpanFlags SPAN_* flags\endlink) indicates + * which of the fragment arrays in the span_arrays struct are relevant. + */ + GLuint arrayMask; + + /** + * We store the arrays of fragment values in a separate struct so + * that we can allocate sw_span structs on the stack without using + * a lot of memory. The span_arrays struct is about 400KB while the + * sw_span struct is only about 512 bytes. + */ + struct span_arrays *array; +}; + + +#define INIT_SPAN(S, PRIMITIVE, END, INTERP_MASK, ARRAY_MASK) \ +do { \ + (S).primitive = (PRIMITIVE); \ + (S).interpMask = (INTERP_MASK); \ + (S).arrayMask = (ARRAY_MASK); \ + (S).start = 0; \ + (S).end = (END); \ + (S).facing = 0; \ + (S).array = SWRAST_CONTEXT(ctx)->SpanArrays; \ +} while (0) + + +typedef void (*texture_sample_func)(GLcontext *ctx, GLuint texUnit, + const struct gl_texture_object *tObj, + GLuint n, const GLfloat texcoords[][4], + const GLfloat lambda[], GLchan rgba[][4]); + typedef void (_ASMAPIP blend_func)( GLcontext *ctx, GLuint n, const GLubyte mask[], GLchan src[][4], CONST GLchan dst[][4] ); -#else -typedef void (*blend_func)( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan src[][4], CONST GLchan dst[][4] ); -#endif typedef void (*swrast_point_func)( GLcontext *ctx, const SWvertex *); @@ -88,6 +234,7 @@ typedef void (*swrast_tri_func)( GLcontext *ctx, const SWvertex *, /**< buffer or no buffers. */ #define OCCLUSION_BIT 0x800 /**< GL_HP_occlusion_test enabled */ #define TEXTURE_BIT 0x1000 /**< Texturing really enabled */ +#define FRAGPROG_BIT 0x2000 /**< Fragment program enabled */ /*@}*/ #define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS| \ @@ -95,6 +242,7 @@ typedef void (*swrast_tri_func)( GLcontext *ctx, const SWvertex *, _NEW_COLOR| \ _NEW_DEPTH| \ _NEW_FOG| \ + _NEW_PROGRAM| \ _NEW_STENCIL| \ _NEW_TEXTURE| \ _NEW_VIEWPORT| \ @@ -121,22 +269,27 @@ typedef struct * _swrast_validate_derived(): */ GLuint _RasterMask; - GLfloat _MinMagThresh[MAX_TEXTURE_UNITS]; - GLfloat _backface_sign; - GLboolean _PreferPixelFog; + GLfloat _MinMagThresh[MAX_TEXTURE_IMAGE_UNITS]; + GLfloat _BackfaceSign; + GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */ GLboolean _AnyTextureCombine; + GLchan _FogColor[3]; + GLboolean _FogEnabled; /* Accum buffer temporaries. */ GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */ GLfloat _IntegerAccumScaler; /**< Implicit scale factor */ + GLchan *CurAuxBuffer; /* Working values: */ GLuint StippleCounter; /**< Line stipple counter */ GLuint NewState; GLuint StateChanges; + GLenum Primitive; /* current primitive being drawn (ala glBegin) */ + GLbitfield CurrentBufferBit; /* exactly one the of DD_*_BIT buffer bits */ /** Mechanism to allow driver (like X11) to register further * software rasterization routines. @@ -170,12 +323,23 @@ typedef struct swrast_tri_func SpecTriangle; /*@}*/ - struct sw_span *span; + /** + * Typically, we'll allocate a sw_span structure as a local variable + * and set its 'array' pointer to point to this object. The reason is + * this object is big and causes problems when allocated on the stack + * on some systems. + */ + struct span_arrays *SpanArrays; + + /** + * Used to buffer N GL_POINTS, instead of rendering one by one. + */ + struct sw_span PointSpan; /** Internal hooks, kept uptodate by the same mechanism as above. */ blend_func BlendFunc; - TextureSampleFunc TextureSample[MAX_TEXTURE_UNITS]; + texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS]; /** Buffer for saving the sampled texture colors. * Needed for GL_ARB_texture_env_crossbar implementation. @@ -220,4 +384,18 @@ _swrast_validate_derived( GLcontext *ctx ); #define FixedToChan(X) FixedToInt(X) #endif + + +extern void +_swrast_translate_program( GLcontext *ctx ); + +extern GLboolean +_swrast_execute_codegen_program(GLcontext *ctx, + const struct fragment_program *program, + GLuint maxInst, + struct fp_machine *machine, + const struct sw_span *span, + GLuint column ); + + #endif