diff options
Diffstat (limited to 'src/mesa/main/formats.h')
| -rw-r--r-- | src/mesa/main/formats.h | 137 |
1 files changed, 136 insertions, 1 deletions
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h index d0959906b3e..8656c01d2d8 100644 --- a/src/mesa/main/formats.h +++ b/src/mesa/main/formats.h @@ -36,7 +36,7 @@ #include <GL/gl.h> #include <stdbool.h> #include <stdint.h> - +#include "compiler.h" #ifdef __cplusplus extern "C" { @@ -82,6 +82,132 @@ enum { }; /** + * An uint32_t that encodes the information necessary to represent an + * array format + */ +typedef uint32_t mesa_array_format; + +/** + * Encoding for valid array format data types + */ +enum mesa_array_format_datatype { + MESA_ARRAY_FORMAT_TYPE_UBYTE = 0x0, + MESA_ARRAY_FORMAT_TYPE_USHORT = 0x1, + MESA_ARRAY_FORMAT_TYPE_UINT = 0x2, + MESA_ARRAY_FORMAT_TYPE_BYTE = 0x4, + MESA_ARRAY_FORMAT_TYPE_SHORT = 0x5, + MESA_ARRAY_FORMAT_TYPE_INT = 0x6, + MESA_ARRAY_FORMAT_TYPE_HALF = 0xd, + MESA_ARRAY_FORMAT_TYPE_FLOAT = 0xe, +}; + +/** + * An enum useful to encode/decode information stored in a mesa_array_format + */ +enum { + MESA_ARRAY_FORMAT_TYPE_IS_SIGNED = 0x4, + MESA_ARRAY_FORMAT_TYPE_IS_FLOAT = 0x8, + MESA_ARRAY_FORMAT_TYPE_NORMALIZED = 0x10, + MESA_ARRAY_FORMAT_DATATYPE_MASK = 0xf, + MESA_ARRAY_FORMAT_TYPE_MASK = 0x1f, + MESA_ARRAY_FORMAT_TYPE_SIZE_MASK = 0x3, + MESA_ARRAY_FORMAT_NUM_CHANS_MASK = 0xe0, + MESA_ARRAY_FORMAT_SWIZZLE_X_MASK = 0x00700, + MESA_ARRAY_FORMAT_SWIZZLE_Y_MASK = 0x03800, + MESA_ARRAY_FORMAT_SWIZZLE_Z_MASK = 0x1c000, + MESA_ARRAY_FORMAT_SWIZZLE_W_MASK = 0xe0000, + MESA_ARRAY_FORMAT_BIT = 0x80000000 +}; + +#define MESA_ARRAY_FORMAT(SIZE, SIGNED, IS_FLOAT, NORM, NUM_CHANS, \ + SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W) ( \ + (((SIZE >> 1) ) & MESA_ARRAY_FORMAT_TYPE_SIZE_MASK) | \ + (((SIGNED) << 2 ) & MESA_ARRAY_FORMAT_TYPE_IS_SIGNED) | \ + (((IS_FLOAT) << 3 ) & MESA_ARRAY_FORMAT_TYPE_IS_FLOAT) | \ + (((NORM) << 4 ) & MESA_ARRAY_FORMAT_TYPE_NORMALIZED) | \ + (((NUM_CHANS) << 5 ) & MESA_ARRAY_FORMAT_NUM_CHANS_MASK) | \ + (((SWIZZLE_X) << 8 ) & MESA_ARRAY_FORMAT_SWIZZLE_X_MASK) | \ + (((SWIZZLE_Y) << 11) & MESA_ARRAY_FORMAT_SWIZZLE_Y_MASK) | \ + (((SWIZZLE_Z) << 14) & MESA_ARRAY_FORMAT_SWIZZLE_Z_MASK) | \ + (((SWIZZLE_W) << 17) & MESA_ARRAY_FORMAT_SWIZZLE_W_MASK) | \ + MESA_ARRAY_FORMAT_BIT) + +/** + * Various helpers to access the data encoded in a mesa_array_format + */ +static inline bool +_mesa_array_format_is_signed(mesa_array_format f) +{ + return (f & MESA_ARRAY_FORMAT_TYPE_IS_SIGNED) != 0; +} + +static inline bool +_mesa_array_format_is_float(mesa_array_format f) +{ + return (f & MESA_ARRAY_FORMAT_TYPE_IS_FLOAT) != 0; +} + +static inline bool +_mesa_array_format_is_normalized(mesa_array_format f) +{ + return (f & MESA_ARRAY_FORMAT_TYPE_NORMALIZED) !=0; +} + +static inline enum mesa_array_format_datatype +_mesa_array_format_get_datatype(mesa_array_format f) +{ + return (enum mesa_array_format_datatype) + (f & MESA_ARRAY_FORMAT_DATATYPE_MASK); +} + +static inline int +_mesa_array_format_datatype_get_size(enum mesa_array_format_datatype type) +{ + return 1 << (type & MESA_ARRAY_FORMAT_TYPE_SIZE_MASK); +} + +static inline int +_mesa_array_format_get_type_size(mesa_array_format f) +{ + return 1 << (f & MESA_ARRAY_FORMAT_TYPE_SIZE_MASK); +} + +static inline int +_mesa_array_format_get_num_channels(mesa_array_format f) +{ + return (f & MESA_ARRAY_FORMAT_NUM_CHANS_MASK) >> 5; +} + +static inline void +_mesa_array_format_get_swizzle(mesa_array_format f, uint8_t *swizzle) +{ + swizzle[0] = (f & MESA_ARRAY_FORMAT_SWIZZLE_X_MASK) >> 8; + swizzle[1] = (f & MESA_ARRAY_FORMAT_SWIZZLE_Y_MASK) >> 11; + swizzle[2] = (f & MESA_ARRAY_FORMAT_SWIZZLE_Z_MASK) >> 14; + swizzle[3] = (f & MESA_ARRAY_FORMAT_SWIZZLE_W_MASK) >> 17; +} + +static inline void +_mesa_array_format_set_swizzle(mesa_array_format *f, + int32_t x, int32_t y, int32_t z, int32_t w) +{ + *f |= ((x << 8 ) & MESA_ARRAY_FORMAT_SWIZZLE_X_MASK) | + ((y << 11) & MESA_ARRAY_FORMAT_SWIZZLE_Y_MASK) | + ((z << 14) & MESA_ARRAY_FORMAT_SWIZZLE_Z_MASK) | + ((w << 17) & MESA_ARRAY_FORMAT_SWIZZLE_W_MASK); +} + +/** + * A helper to know if the format stored in a uint32_t is a mesa_format + * or a mesa_array_format + */ +static inline bool +_mesa_format_is_mesa_array_format(uint32_t f) +{ + return (f & MESA_ARRAY_FORMAT_BIT) != 0; +} + +/** * Mesa texture/renderbuffer image formats. */ typedef enum @@ -466,9 +592,18 @@ _mesa_get_format_base_format(mesa_format format); extern void _mesa_get_format_block_size(mesa_format format, GLuint *bw, GLuint *bh); +extern mesa_array_format +_mesa_array_format_flip_channels(mesa_array_format format); + extern void _mesa_get_format_swizzle(mesa_format format, uint8_t swizzle_out[4]); +extern uint32_t +_mesa_format_to_array_format(mesa_format format); + +extern mesa_format +_mesa_format_from_array_format(uint32_t array_format); + extern GLboolean _mesa_is_format_compressed(mesa_format format); |