diff options
Diffstat (limited to 'mesalib/src/mesa/swrast/s_context.h')
| -rw-r--r-- | mesalib/src/mesa/swrast/s_context.h | 697 |
1 files changed, 348 insertions, 349 deletions
diff --git a/mesalib/src/mesa/swrast/s_context.h b/mesalib/src/mesa/swrast/s_context.h index 7535832ab..8d7458c2d 100644 --- a/mesalib/src/mesa/swrast/s_context.h +++ b/mesalib/src/mesa/swrast/s_context.h @@ -1,349 +1,348 @@ -/*
- * Mesa 3-D graphics library
- * Version: 6.5.3
- *
- * 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.
- */
-
-
-/**
- * \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 "main/compiler.h"
-#include "main/mtypes.h"
-#include "program/prog_execute.h"
-#include "swrast.h"
-#include "s_span.h"
-
-
-typedef void (*texture_sample_func)(struct gl_context *ctx,
- const struct gl_texture_object *tObj,
- GLuint n, const GLfloat texcoords[][4],
- const GLfloat lambda[], GLfloat rgba[][4]);
-
-typedef void (_ASMAPIP blend_func)( struct gl_context *ctx, GLuint n,
- const GLubyte mask[],
- GLvoid *src, const GLvoid *dst,
- GLenum chanType);
-
-typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *);
-
-typedef void (*swrast_line_func)( struct gl_context *ctx,
- const SWvertex *, const SWvertex *);
-
-typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *,
- const SWvertex *, const SWvertex *);
-
-
-typedef void (*validate_texture_image_func)(struct gl_context *ctx,
- struct gl_texture_object *texObj,
- GLuint face, GLuint level);
-
-
-/**
- * \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 CLAMPING_BIT 0x8000 /**< Clamp colors to [0,1] */
-/*@}*/
-
-#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 Per-context state that's private to the software rasterizer module.
- */
-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():
- */
- GLbitfield _RasterMask;
- GLfloat _BackfaceSign; /** +1 or -1 */
- GLfloat _BackfaceCullSign; /** +1, 0, or -1 */
- GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */
- GLboolean _TextureCombinePrimary;
- GLboolean _FogEnabled;
- GLboolean _DeferredTexture;
- GLenum _FogMode; /* either GL_FOG_MODE or fragment program's fog mode */
-
- /** List/array of the fragment attributes to interpolate */
- GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];
- /** Same info, but as a bitmask */
- GLbitfield _ActiveAttribMask;
- /** Number of fragment attributes to interpolate */
- GLuint _NumActiveAttribs;
- /** Indicates how each attrib is to be interpolated (lines/tris) */
- GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */
-
- /* Accum buffer temporaries.
- */
- GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */
- GLfloat _IntegerAccumScaler; /**< Implicit scale factor */
-
- /* Working values:
- */
- GLuint StippleCounter; /**< Line stipple counter */
- GLuint PointLineFacing;
- GLbitfield NewState;
- GLuint StateChanges;
- GLenum Primitive; /* current primitive being drawn (ala glBegin) */
- GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */
-
- void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state );
-
- /**
- * When the NewState mask intersects these masks, we invalidate the
- * Point/Line/Triangle function pointers below.
- */
- /*@{*/
- GLbitfield InvalidatePointMask;
- GLbitfield InvalidateLineMask;
- GLbitfield InvalidateTriangleMask;
- /*@}*/
-
- /**
- * Device drivers plug in functions for these callbacks.
- * Will be called when the GL state change mask intersects the above masks.
- */
- /*@{*/
- void (*choose_point)( struct gl_context * );
- void (*choose_line)( struct gl_context * );
- void (*choose_triangle)( struct gl_context * );
- /*@}*/
-
- /**
- * Current point, line and triangle drawing functions.
- */
- /*@{*/
- 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.
- */
- SWspanarrays *SpanArrays;
- SWspanarrays *ZoomedArrays; /**< For pixel zooming */
-
- /**
- * Used to buffer N GL_POINTS, instead of rendering one by one.
- */
- SWspan PointSpan;
-
- /** Internal hooks, kept up to date 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.
- */
- GLfloat *TexelBuffer;
-
- validate_texture_image_func ValidateTextureImage;
-
- /** State used during execution of fragment programs */
- struct gl_program_machine FragProgMachine;
-
-} SWcontext;
-
-
-extern void
-_swrast_validate_derived( struct gl_context *ctx );
-
-extern void
-_swrast_update_texture_samplers(struct gl_context *ctx);
-
-
-/** Return SWcontext for the given struct gl_context */
-static INLINE SWcontext *
-SWRAST_CONTEXT(struct gl_context *ctx)
-{
- return (SWcontext *) ctx->swrast_context;
-}
-
-/** const version of above */
-static INLINE const SWcontext *
-CONST_SWRAST_CONTEXT(const struct gl_context *ctx)
-{
- return (const SWcontext *) ctx->swrast_context;
-}
-
-
-/**
- * Called prior to framebuffer reading/writing.
- * For drivers that rely on swrast for fallback rendering, this is the
- * driver's opportunity to map renderbuffers and textures.
- */
-static INLINE void
-swrast_render_start(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.SpanRenderStart)
- swrast->Driver.SpanRenderStart(ctx);
-}
-
-
-/** Called after framebuffer reading/writing */
-static INLINE void
-swrast_render_finish(struct gl_context *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- if (swrast->Driver.SpanRenderFinish)
- swrast->Driver.SpanRenderFinish(ctx);
-}
-
-
-
-/**
- * Size of an RGBA pixel, in bytes, for given datatype.
- */
-#define RGBA_PIXEL_SIZE(TYPE) \
- ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) : \
- ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort) \
- : 4 * sizeof(GLfloat)))
-
-
-
-/*
- * Fixed point arithmetic macros
- */
-#ifndef FIXED_FRAC_BITS
-#define FIXED_FRAC_BITS 11
-#endif
-
-#define FIXED_SHIFT FIXED_FRAC_BITS
-#define FIXED_ONE (1 << FIXED_SHIFT)
-#define FIXED_HALF (1 << (FIXED_SHIFT-1))
-#define FIXED_FRAC_MASK (FIXED_ONE - 1)
-#define FIXED_INT_MASK (~FIXED_FRAC_MASK)
-#define FIXED_EPSILON 1
-#define FIXED_SCALE ((float) FIXED_ONE)
-#define FIXED_DBL_SCALE ((double) FIXED_ONE)
-#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
-#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
-#define IntToFixed(I) ((I) << FIXED_SHIFT)
-#define FixedToInt(X) ((X) >> FIXED_SHIFT)
-#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT)
-#define FixedCeil(X) (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
-#define FixedFloor(X) ((X) & FIXED_INT_MASK)
-#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
-#define PosFloatToFixed(X) FloatToFixed(X)
-#define SignedFloatToFixed(X) FloatToFixed(X)
-
-
-
-/*
- * 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
-
-
-/**
- * For looping over fragment attributes in the pointe, line
- * triangle rasterizers.
- */
-#define ATTRIB_LOOP_BEGIN \
- { \
- GLuint a; \
- for (a = 0; a < swrast->_NumActiveAttribs; a++) { \
- const GLuint attr = swrast->_ActiveAttribs[a];
-
-#define ATTRIB_LOOP_END } }
-
-
-
-#endif
+/* + * Mesa 3-D graphics library + * Version: 6.5.3 + * + * 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. + */ + + +/** + * \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 "main/compiler.h" +#include "main/mtypes.h" +#include "program/prog_execute.h" +#include "swrast.h" +#include "s_span.h" + + +typedef void (*texture_sample_func)(struct gl_context *ctx, + const struct gl_texture_object *tObj, + GLuint n, const GLfloat texcoords[][4], + const GLfloat lambda[], GLfloat rgba[][4]); + +typedef void (_ASMAPIP blend_func)( struct gl_context *ctx, GLuint n, + const GLubyte mask[], + GLvoid *src, const GLvoid *dst, + GLenum chanType); + +typedef void (*swrast_point_func)( struct gl_context *ctx, const SWvertex *); + +typedef void (*swrast_line_func)( struct gl_context *ctx, + const SWvertex *, const SWvertex *); + +typedef void (*swrast_tri_func)( struct gl_context *ctx, const SWvertex *, + const SWvertex *, const SWvertex *); + + +typedef void (*validate_texture_image_func)(struct gl_context *ctx, + struct gl_texture_object *texObj, + GLuint face, GLuint level); + + +/** + * \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 CLAMPING_BIT 0x8000 /**< Clamp colors to [0,1] */ +/*@}*/ + +#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 Per-context state that's private to the software rasterizer module. + */ +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(): + */ + GLbitfield _RasterMask; + GLfloat _BackfaceSign; /** +1 or -1 */ + GLfloat _BackfaceCullSign; /** +1, 0, or -1 */ + GLboolean _PreferPixelFog; /* Compute fog blend factor per fragment? */ + GLboolean _TextureCombinePrimary; + GLboolean _FogEnabled; + GLboolean _DeferredTexture; + + /** List/array of the fragment attributes to interpolate */ + GLuint _ActiveAttribs[FRAG_ATTRIB_MAX]; + /** Same info, but as a bitmask */ + GLbitfield _ActiveAttribMask; + /** Number of fragment attributes to interpolate */ + GLuint _NumActiveAttribs; + /** Indicates how each attrib is to be interpolated (lines/tris) */ + GLenum _InterpMode[FRAG_ATTRIB_MAX]; /* GL_FLAT or GL_SMOOTH (for now) */ + + /* Accum buffer temporaries. + */ + GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */ + GLfloat _IntegerAccumScaler; /**< Implicit scale factor */ + + /* Working values: + */ + GLuint StippleCounter; /**< Line stipple counter */ + GLuint PointLineFacing; + GLbitfield NewState; + GLuint StateChanges; + GLenum Primitive; /* current primitive being drawn (ala glBegin) */ + GLboolean SpecularVertexAdd; /**< Add specular/secondary color per vertex */ + + void (*InvalidateState)( struct gl_context *ctx, GLbitfield new_state ); + + /** + * When the NewState mask intersects these masks, we invalidate the + * Point/Line/Triangle function pointers below. + */ + /*@{*/ + GLbitfield InvalidatePointMask; + GLbitfield InvalidateLineMask; + GLbitfield InvalidateTriangleMask; + /*@}*/ + + /** + * Device drivers plug in functions for these callbacks. + * Will be called when the GL state change mask intersects the above masks. + */ + /*@{*/ + void (*choose_point)( struct gl_context * ); + void (*choose_line)( struct gl_context * ); + void (*choose_triangle)( struct gl_context * ); + /*@}*/ + + /** + * Current point, line and triangle drawing functions. + */ + /*@{*/ + 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. + */ + SWspanarrays *SpanArrays; + SWspanarrays *ZoomedArrays; /**< For pixel zooming */ + + /** + * Used to buffer N GL_POINTS, instead of rendering one by one. + */ + SWspan PointSpan; + + /** Internal hooks, kept up to date 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. + */ + GLfloat *TexelBuffer; + + validate_texture_image_func ValidateTextureImage; + + /** State used during execution of fragment programs */ + struct gl_program_machine FragProgMachine; + +} SWcontext; + + +extern void +_swrast_validate_derived( struct gl_context *ctx ); + +extern void +_swrast_update_texture_samplers(struct gl_context *ctx); + + +/** Return SWcontext for the given struct gl_context */ +static INLINE SWcontext * +SWRAST_CONTEXT(struct gl_context *ctx) +{ + return (SWcontext *) ctx->swrast_context; +} + +/** const version of above */ +static INLINE const SWcontext * +CONST_SWRAST_CONTEXT(const struct gl_context *ctx) +{ + return (const SWcontext *) ctx->swrast_context; +} + + +/** + * Called prior to framebuffer reading/writing. + * For drivers that rely on swrast for fallback rendering, this is the + * driver's opportunity to map renderbuffers and textures. + */ +static INLINE void +swrast_render_start(struct gl_context *ctx) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + if (swrast->Driver.SpanRenderStart) + swrast->Driver.SpanRenderStart(ctx); +} + + +/** Called after framebuffer reading/writing */ +static INLINE void +swrast_render_finish(struct gl_context *ctx) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + if (swrast->Driver.SpanRenderFinish) + swrast->Driver.SpanRenderFinish(ctx); +} + + + +/** + * Size of an RGBA pixel, in bytes, for given datatype. + */ +#define RGBA_PIXEL_SIZE(TYPE) \ + ((TYPE == GL_UNSIGNED_BYTE) ? 4 * sizeof(GLubyte) : \ + ((TYPE == GL_UNSIGNED_SHORT) ? 4 * sizeof(GLushort) \ + : 4 * sizeof(GLfloat))) + + + +/* + * Fixed point arithmetic macros + */ +#ifndef FIXED_FRAC_BITS +#define FIXED_FRAC_BITS 11 +#endif + +#define FIXED_SHIFT FIXED_FRAC_BITS +#define FIXED_ONE (1 << FIXED_SHIFT) +#define FIXED_HALF (1 << (FIXED_SHIFT-1)) +#define FIXED_FRAC_MASK (FIXED_ONE - 1) +#define FIXED_INT_MASK (~FIXED_FRAC_MASK) +#define FIXED_EPSILON 1 +#define FIXED_SCALE ((float) FIXED_ONE) +#define FIXED_DBL_SCALE ((double) FIXED_ONE) +#define FloatToFixed(X) (IROUND((X) * FIXED_SCALE)) +#define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE)) +#define IntToFixed(I) ((I) << FIXED_SHIFT) +#define FixedToInt(X) ((X) >> FIXED_SHIFT) +#define FixedToUns(X) (((unsigned int)(X)) >> FIXED_SHIFT) +#define FixedCeil(X) (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK) +#define FixedFloor(X) ((X) & FIXED_INT_MASK) +#define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE)) +#define PosFloatToFixed(X) FloatToFixed(X) +#define SignedFloatToFixed(X) FloatToFixed(X) + + + +/* + * 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 + + +/** + * For looping over fragment attributes in the pointe, line + * triangle rasterizers. + */ +#define ATTRIB_LOOP_BEGIN \ + { \ + GLuint a; \ + for (a = 0; a < swrast->_NumActiveAttribs; a++) { \ + const GLuint attr = swrast->_ActiveAttribs[a]; + +#define ATTRIB_LOOP_END } } + + + +#endif |