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mesa: move GLfixed type and related macros to swrast module

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Fixed point is only used in swrast and sw-based drivers.
This commit is contained in:
Brian Paul 2009-02-27 22:26:18 -07:00
parent 8bf25a17d2
commit 389d50baff
3 changed files with 34 additions and 32 deletions
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32
src/mesa/main/mtypes.h
View file

@ -78,38 +78,6 @@
#endif
/**
* Fixed point data type.
*/
typedef int GLfixed;
/*
* 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)
/**
* \name Some forward type declarations
*/

28
src/mesa/swrast/s_context.h
View file

@ -288,6 +288,34 @@ swrast_render_finish(GLcontext *ctx)
/*
* 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.

6
src/mesa/swrast/swrast.h
View file

@ -75,6 +75,12 @@ typedef struct {
} SWvertex;
/**
* Fixed point data type.
*/
typedef int GLfixed;
#define FRAG_ATTRIB_CI FRAG_ATTRIB_COL0