X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fmacros.h;h=dbe5b867c297b6a00687881a8ac8437aff14a908;hb=9ec5050898877baa6120fd9a04464651c7cb28ad;hp=55578adf836c874e7ec606a57e9b5f0228059570;hpb=fd70841121475d7aad98812d6bf9c9c67567b89a;p=mesa.git diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h index 55578adf836..dbe5b867c29 100644 --- a/src/mesa/main/macros.h +++ b/src/mesa/main/macros.h @@ -54,12 +54,15 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; #define FLOAT_TO_BYTE(X) ( (((GLint) (255.0F * (X))) - 1) / 2 ) +/** Convert GLbyte to GLfloat while preserving zero */ +#define BYTE_TO_FLOATZ(B) ((B) == 0 ? 0.0F : BYTE_TO_FLOAT(B)) + + /** Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0], texture/fb data */ #define BYTE_TO_FLOAT_TEX(B) ((B) == -128 ? -1.0F : (B) * (1.0F/127.0F)) /** Convert GLfloat in [-1.0,1.0] to GLbyte in [-128,127], texture/fb data */ -#define FLOAT_TO_BYTE_TEX(X) ( (GLint) (127.0F * (X)) ) - +#define FLOAT_TO_BYTE_TEX(X) CLAMP( (GLint) (127.0F * (X)), -128, 127 ) /** Convert GLushort in [0,65535] to GLfloat in [0.0,1.0] */ #define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F)) @@ -74,6 +77,9 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; /** Convert GLfloat in [-1.0,1.0] to GLshort in [-32768,32767] */ #define FLOAT_TO_SHORT(X) ( (((GLint) (65535.0F * (X))) - 1) / 2 ) +/** Convert GLshort to GLfloat while preserving zero */ +#define SHORT_TO_FLOATZ(S) ((S) == 0 ? 0.0F : SHORT_TO_FLOAT(S)) + /** Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0], texture/fb data */ #define SHORT_TO_FLOAT_TEX(S) ((S) == -32768 ? -1.0F : (S) * (1.0F/32767.0F)) @@ -83,14 +89,14 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; /** Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0] */ -#define UINT_TO_FLOAT(U) ((GLfloat) (U) * (1.0F / 4294967295.0)) +#define UINT_TO_FLOAT(U) ((GLfloat) ((U) * (1.0F / 4294967295.0))) /** Convert GLfloat in [0.0,1.0] to GLuint in [0,4294967295] */ #define FLOAT_TO_UINT(X) ((GLuint) ((X) * 4294967295.0)) /** Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0] */ -#define INT_TO_FLOAT(I) ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0)) +#define INT_TO_FLOAT(I) ((GLfloat) ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0))) /** Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647] */ /* causes overflow: @@ -127,6 +133,44 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; #define CLAMPED_FLOAT_TO_USHORT(us, f) \ us = ( (GLushort) IROUND( (f) * 65535.0F) ) +#define UNCLAMPED_FLOAT_TO_SHORT(s, f) \ + s = ( (GLshort) IROUND( CLAMP((f), -1.0F, 1.0F) * 32767.0F) ) + +/*** + *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255] + *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255] + ***/ +#if defined(USE_IEEE) && !defined(DEBUG) +#define IEEE_0996 0x3f7f0000 /* 0.996 or so */ +/* This function/macro is sensitive to precision. Test very carefully + * if you change it! + */ +#define UNCLAMPED_FLOAT_TO_UBYTE(UB, F) \ + do { \ + fi_type __tmp; \ + __tmp.f = (F); \ + if (__tmp.i < 0) \ + UB = (GLubyte) 0; \ + else if (__tmp.i >= IEEE_0996) \ + UB = (GLubyte) 255; \ + else { \ + __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F; \ + UB = (GLubyte) __tmp.i; \ + } \ + } while (0) +#define CLAMPED_FLOAT_TO_UBYTE(UB, F) \ + do { \ + fi_type __tmp; \ + __tmp.f = (F) * (255.0F/256.0F) + 32768.0F; \ + UB = (GLubyte) __tmp.i; \ + } while (0) +#else +#define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \ + ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F)) +#define CLAMPED_FLOAT_TO_UBYTE(ub, f) \ + ub = ((GLubyte) IROUND((f) * 255.0F)) +#endif + /*@}*/ @@ -138,10 +182,6 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; #define STRIDE_4UB(p, i) (p = (GLubyte (*)[4])((GLubyte *)p + i)) /** Stepping a GLfloat[4] pointer by a byte stride */ #define STRIDE_4F(p, i) (p = (GLfloat (*)[4])((GLubyte *)p + i)) -/** Stepping a GLchan[4] pointer by a byte stride */ -#define STRIDE_4CHAN(p, i) (p = (GLchan (*)[4])((GLubyte *)p + i)) -/** Stepping a GLchan pointer by a byte stride */ -#define STRIDE_CHAN(p, i) (p = (GLchan *)((GLubyte *)p + i)) /** Stepping a \p t pointer by a byte stride */ #define STRIDE_T(p, t, i) (p = (t)((GLubyte *)p + i)) @@ -207,7 +247,7 @@ do { \ */ #define COPY_4FV( DST, SRC ) \ do { \ - _mesa_memcpy(DST, SRC, sizeof(GLfloat) * 4); \ + memcpy(DST, SRC, sizeof(GLfloat) * 4); \ } while (0) /** Copy \p SZ elements into a 4-element vector */ @@ -555,27 +595,6 @@ do { \ */ #define LINTERP(T, OUT, IN) ((OUT) + (T) * ((IN) - (OUT))) -/* Can do better with integer math - */ -#define INTERP_UB( t, dstub, outub, inub ) \ -do { \ - GLfloat inf = UBYTE_TO_FLOAT( inub ); \ - GLfloat outf = UBYTE_TO_FLOAT( outub ); \ - GLfloat dstf = LINTERP( t, outf, inf ); \ - UNCLAMPED_FLOAT_TO_UBYTE( dstub, dstf ); \ -} while (0) - -#define INTERP_CHAN( t, dstc, outc, inc ) \ -do { \ - GLfloat inf = CHAN_TO_FLOAT( inc ); \ - GLfloat outf = CHAN_TO_FLOAT( outc ); \ - GLfloat dstf = LINTERP( t, outf, inf ); \ - UNCLAMPED_FLOAT_TO_CHAN( dstc, dstf ); \ -} while (0) - -#define INTERP_UI( t, dstui, outui, inui ) \ - dstui = (GLuint) (GLint) LINTERP( (t), (GLfloat) (outui), (GLfloat) (inui) ) - #define INTERP_F( t, dstf, outf, inf ) \ dstf = LINTERP( t, outf, inf ) @@ -594,31 +613,6 @@ do { \ dst[2] = LINTERP( (t), (out)[2], (in)[2] ); \ } while (0) -#define INTERP_4CHAN( t, dst, out, in ) \ -do { \ - INTERP_CHAN( (t), (dst)[0], (out)[0], (in)[0] ); \ - INTERP_CHAN( (t), (dst)[1], (out)[1], (in)[1] ); \ - INTERP_CHAN( (t), (dst)[2], (out)[2], (in)[2] ); \ - INTERP_CHAN( (t), (dst)[3], (out)[3], (in)[3] ); \ -} while (0) - -#define INTERP_3CHAN( t, dst, out, in ) \ -do { \ - INTERP_CHAN( (t), (dst)[0], (out)[0], (in)[0] ); \ - INTERP_CHAN( (t), (dst)[1], (out)[1], (in)[1] ); \ - INTERP_CHAN( (t), (dst)[2], (out)[2], (in)[2] ); \ -} while (0) - -#define INTERP_SZ( t, vec, to, out, in, sz ) \ -do { \ - switch (sz) { \ - case 4: vec[to][3] = LINTERP( (t), (vec)[out][3], (vec)[in][3] ); \ - case 3: vec[to][2] = LINTERP( (t), (vec)[out][2], (vec)[in][2] ); \ - case 2: vec[to][1] = LINTERP( (t), (vec)[out][1], (vec)[in][1] ); \ - case 1: vec[to][0] = LINTERP( (t), (vec)[out][0], (vec)[in][0] ); \ - } \ -} while(0) - /*@}*/ @@ -632,6 +626,10 @@ do { \ /** Maximum of two values: */ #define MAX2( A, B ) ( (A)>(B) ? (A) : (B) ) +/** Minimum and maximum of three values: */ +#define MIN3( A, B, C ) ((A) < (B) ? MIN2(A, C) : MIN2(B, C)) +#define MAX3( A, B, C ) ((A) > (B) ? MAX2(A, C) : MAX2(B, C)) + /** Dot product of two 2-element vectors */ #define DOT2( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] ) @@ -642,9 +640,6 @@ do { \ #define DOT4( a, b ) ( (a)[0]*(b)[0] + (a)[1]*(b)[1] + \ (a)[2]*(b)[2] + (a)[3]*(b)[3] ) -/** Dot product of two 4-element vectors */ -#define DOT4V(v,a,b,c,d) (v[0]*(a) + v[1]*(b) + v[2]*(c) + v[3]*(d)) - /** Cross product of two 3-element vectors */ #define CROSS3(n, u, v) \ @@ -674,6 +669,10 @@ do { \ #define LEN_SQUARED_2FV( V ) ((V)[0]*(V)[0]+(V)[1]*(V)[1]) +/** Compute ceiling of integer quotient of A divided by B. */ +#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 ) + + /** casts to silence warnings with some compilers */ #define ENUM_TO_INT(E) ((GLint)(E)) #define ENUM_TO_FLOAT(E) ((GLfloat)(GLint)(E))