Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 411 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_context.h b/nx-X11/extras/Mesa/src/mesa/swrast/s_context.h
new file mode 100644
index 000000000..5f5efdc22
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_context.h
@@ -0,0 +1,411 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.1
+ *
+ * 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"),
+ * 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.
+ */
+
+
+/**
+ * \file swrast/s_context.h
+ * \brief Software rasterization context and private types.
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+/**
+ * \mainpage swrast module
+ *
+ * This module, software rasterization, contains the software fallback
+ * routines for drawing points, lines, triangles, bitmaps and images.
+ * All rendering boils down to writing spans (arrays) of pixels with
+ * particular colors.  The span-writing routines must be implemented
+ * by the device driver.
+ */
+
+
+#ifndef S_CONTEXT_H
+#define S_CONTEXT_H
+
+#include "mtypes.h"
+#include "swrast.h"
+
+
+/**
+ * \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)
+ */
+/*@{*/
+#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];
+};
+
+
+/**
+ * \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.
+ */
+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] );
+
+typedef void (*swrast_point_func)( GLcontext *ctx, const SWvertex *);
+
+typedef void (*swrast_line_func)( GLcontext *ctx,
+                                  const SWvertex *, const SWvertex *);
+
+typedef void (*swrast_tri_func)( GLcontext *ctx, const SWvertex *,
+                                 const SWvertex *, const SWvertex *);
+
+
+/** \defgroup Bitmasks
+ * Bitmasks to indicate which rasterization options are enabled
+ * (RasterMask)
+ */
+/*@{*/
+#define ALPHATEST_BIT		0x001	/**< Alpha-test pixels */
+#define BLEND_BIT		0x002	/**< Blend pixels */
+#define DEPTH_BIT		0x004	/**< Depth-test pixels */
+#define FOG_BIT			0x008	/**< Fog pixels */
+#define LOGIC_OP_BIT		0x010	/**< Apply logic op in software */
+#define CLIP_BIT		0x020	/**< Scissor or window clip pixels */
+#define STENCIL_BIT		0x040	/**< Stencil pixels */
+#define MASKING_BIT		0x080	/**< Do glColorMask or glIndexMask */
+#define MULTI_DRAW_BIT		0x400	/**< Write to more than one color- */
+                                        /**< 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 ATIFRAGSHADER_BIT       0x4000  /**< ATI Fragment shader enabled */
+/*@}*/
+
+#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS|	\
+			        _NEW_SCISSOR|	\
+			        _NEW_COLOR|	\
+			        _NEW_DEPTH|	\
+			        _NEW_FOG|	\
+                                _NEW_PROGRAM|   \
+			        _NEW_STENCIL|	\
+			        _NEW_TEXTURE|	\
+			        _NEW_VIEWPORT|	\
+			        _NEW_DEPTH)
+
+
+/**
+ * \struct SWcontext
+ * \brief SWContext?
+ */
+typedef struct
+{
+   /** Driver interface:
+    */
+   struct swrast_device_driver Driver;
+
+   /** Configuration mechanisms to make software rasterizer match
+    * characteristics of the hardware rasterizer (if present):
+    */
+   GLboolean AllowVertexFog;
+   GLboolean AllowPixelFog;
+
+   /** Derived values, invalidated on statechanges, updated from
+    * _swrast_validate_derived():
+    */
+   GLuint _RasterMask;
+   GLfloat _MinMagThresh[MAX_TEXTURE_IMAGE_UNITS];
+   GLfloat _BackfaceSign;
+   GLboolean _PreferPixelFog;    /* Compute fog blend factor per fragment? */
+   GLboolean _AnyTextureCombine;
+   GLchan _FogColor[3];
+   GLboolean _FogEnabled;
+   GLenum _FogMode;  /* either GL_FOG_MODE or fragment program's fog mode */
+
+   /* Accum buffer temporaries.
+    */
+   GLboolean _IntegerAccumMode;	/**< Storing unscaled integers? */
+   GLfloat _IntegerAccumScaler;	/**< Implicit scale factor */
+
+   /* 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.
+    */
+   /*@{*/
+   void (*choose_point)( GLcontext * );
+   void (*choose_line)( GLcontext * );
+   void (*choose_triangle)( GLcontext * );
+
+   GLuint invalidate_point;
+   GLuint invalidate_line;
+   GLuint invalidate_triangle;
+   /*@}*/
+
+   /** Function pointers for dispatch behind public entrypoints. */
+   /*@{*/
+   void (*InvalidateState)( GLcontext *ctx, GLuint new_state );
+
+   swrast_point_func Point;
+   swrast_line_func Line;
+   swrast_tri_func Triangle;
+   /*@}*/
+
+   /**
+    * Placeholders for when separate specular (or secondary color) is
+    * enabled but texturing is not.
+    */
+   /*@{*/
+   swrast_point_func SpecPoint;
+   swrast_line_func SpecLine;
+   swrast_tri_func SpecTriangle;
+   /*@}*/
+
+   /**
+    * 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;
+   texture_sample_func TextureSample[MAX_TEXTURE_IMAGE_UNITS];
+
+   /** Buffer for saving the sampled texture colors.
+    * Needed for GL_ARB_texture_env_crossbar implementation.
+    */
+   GLchan *TexelBuffer;
+
+} SWcontext;
+
+
+extern void
+_swrast_validate_derived( GLcontext *ctx );
+
+
+#define SWRAST_CONTEXT(ctx) ((SWcontext *)ctx->swrast_context)
+
+#define RENDER_START(SWctx, GLctx)			\
+   do {							\
+      if ((SWctx)->Driver.SpanRenderStart) {		\
+         (*(SWctx)->Driver.SpanRenderStart)(GLctx);	\
+      }							\
+   } while (0)
+
+#define RENDER_FINISH(SWctx, GLctx)			\
+   do {							\
+      if ((SWctx)->Driver.SpanRenderFinish) {		\
+         (*(SWctx)->Driver.SpanRenderFinish)(GLctx);	\
+      }							\
+   } while (0)
+
+
+
+/*
+ * XXX these macros are just bandages for now in order to make
+ * CHAN_BITS==32 compile cleanly.
+ * These should probably go elsewhere at some point.
+ */
+#if CHAN_TYPE == GL_FLOAT
+#define ChanToFixed(X)  (X)
+#define FixedToChan(X)  (X)
+#else
+#define ChanToFixed(X)  IntToFixed(X)
+#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