diff options
Diffstat (limited to 'src/mesa/main/macros.h')
| -rw-r--r-- | src/mesa/main/macros.h | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h index 2630855a0e..3d9a1aba98 100644 --- a/src/mesa/main/macros.h +++ b/src/mesa/main/macros.h @@ -54,33 +54,61 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; #define FLOAT_TO_BYTE(X) ( (((GLint) (255.0F * (X))) - 1) / 2 ) -/** Convert GLushort in [0,65536] to GLfloat in [0.0,1.0] */ +/** 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)) ) + + +/** Convert GLushort in [0,65535] to GLfloat in [0.0,1.0] */ #define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F)) +/** Convert GLfloat in [0.0,1.0] to GLushort in [0, 65535] */ +#define FLOAT_TO_USHORT(X) ((GLuint) ((X) * 65535.0F)) + + /** Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0] */ #define SHORT_TO_FLOAT(S) ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)) -/** Convert GLfloat in [0.0,1.0] to GLshort in [-32768,32767] */ +/** 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 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)) + +/** Convert GLfloat in [-1.0,1.0] to GLshort in [-32768,32767], texture/fb data */ +#define FLOAT_TO_SHORT_TEX(X) ( (GLint) (32767.0F * (X)) ) + + /** Convert GLuint in [0,4294967295] to GLfloat in [0.0,1.0] */ -#define UINT_TO_FLOAT(U) ((GLfloat) (U) * (1.0F / 4294967295.0F)) +#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/4294967294.0F)) +#define INT_TO_FLOAT(I) ((2.0F * (I) + 1.0F) * (1.0F/4294967294.0)) /** Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647] */ /* causes overflow: -#define FLOAT_TO_INT(X) ( (((GLint) (4294967294.0F * (X))) - 1) / 2 ) +#define FLOAT_TO_INT(X) ( (((GLint) (4294967294.0 * (X))) - 1) / 2 ) */ /* a close approximation: */ #define FLOAT_TO_INT(X) ( (GLint) (2147483647.0 * (X)) ) +/** Convert GLfloat in [-1.0,1.0] to GLint64 in [-(1<<63),(1 << 63) -1] */ +#define FLOAT_TO_INT64(X) ( (GLint64) (9223372036854775807.0 * (double)(X)) ) + + +/** Convert GLint in [-2147483648,2147483647] to GLfloat in [-1.0,1.0], texture/fb data */ +#define INT_TO_FLOAT_TEX(I) ((I) == -2147483648 ? -1.0F : (I) * (1.0F/2147483647.0)) + +/** Convert GLfloat in [-1.0,1.0] to GLint in [-2147483648,2147483647], texture/fb data */ +#define FLOAT_TO_INT_TEX(X) ( (GLint) (2147483647.0 * (X)) ) + #define BYTE_TO_UBYTE(b) ((GLubyte) ((b) < 0 ? 0 : (GLubyte) (b))) #define SHORT_TO_UBYTE(s) ((GLubyte) ((s) < 0 ? 0 : (GLubyte) ((s) >> 7))) @@ -95,7 +123,7 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; #define INT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 15))) #define UINT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 16))) #define UNCLAMPED_FLOAT_TO_USHORT(us, f) \ - us = ( (GLushort) IROUND( CLAMP((f), 0.0, 1.0) * 65535.0F) ) + us = ( (GLushort) IROUND( CLAMP((f), 0.0F, 1.0F) * 65535.0F) ) #define CLAMPED_FLOAT_TO_USHORT(us, f) \ us = ( (GLushort) IROUND( (f) * 65535.0F) ) |