diff options
Diffstat (limited to 'mesalib/src/mesa/main/format_utils.h')
| -rw-r--r-- | mesalib/src/mesa/main/format_utils.h | 195 |
1 files changed, 193 insertions, 2 deletions
diff --git a/mesalib/src/mesa/main/format_utils.h b/mesalib/src/mesa/main/format_utils.h index 9f778e377..7f500ec78 100644 --- a/mesalib/src/mesa/main/format_utils.h +++ b/mesalib/src/mesa/main/format_utils.h @@ -32,14 +32,205 @@ #define FORMAT_UTILS_H #include "imports.h" +#include "macros.h" + +extern const mesa_array_format RGBA32_FLOAT; +extern const mesa_array_format RGBA8_UBYTE; +extern const mesa_array_format RGBA32_UINT; +extern const mesa_array_format RGBA32_INT; + +/* Only guaranteed to work for BITS <= 32 */ +#define MAX_UINT(BITS) ((BITS) == 32 ? UINT32_MAX : ((1u << (BITS)) - 1)) +#define MAX_INT(BITS) ((int)MAX_UINT((BITS) - 1)) +#define MIN_INT(BITS) ((BITS) == 32 ? INT32_MIN : (-(1 << (BITS - 1)))) + +/* Extends an integer of size SRC_BITS to one of size DST_BITS linearly */ +#define EXTEND_NORMALIZED_INT(X, SRC_BITS, DST_BITS) \ + (((X) * (int)(MAX_UINT(DST_BITS) / MAX_UINT(SRC_BITS))) + \ + ((DST_BITS % SRC_BITS) ? ((X) >> (SRC_BITS - DST_BITS % SRC_BITS)) : 0)) + +static inline float +_mesa_unorm_to_float(unsigned x, unsigned src_bits) +{ + return x * (1.0f / (float)MAX_UINT(src_bits)); +} + +static inline float +_mesa_snorm_to_float(int x, unsigned src_bits) +{ + if (x <= -MAX_INT(src_bits)) + return -1.0f; + else + return x * (1.0f / (float)MAX_INT(src_bits)); +} + +static inline uint16_t +_mesa_unorm_to_half(unsigned x, unsigned src_bits) +{ + return _mesa_float_to_half(_mesa_unorm_to_float(x, src_bits)); +} + +static inline uint16_t +_mesa_snorm_to_half(int x, unsigned src_bits) +{ + return _mesa_float_to_half(_mesa_snorm_to_float(x, src_bits)); +} + +static inline unsigned +_mesa_float_to_unorm(float x, unsigned dst_bits) +{ + if (x < 0.0f) + return 0; + else if (x > 1.0f) + return MAX_UINT(dst_bits); + else + return F_TO_I(x * MAX_UINT(dst_bits)); +} + +static inline unsigned +_mesa_half_to_unorm(uint16_t x, unsigned dst_bits) +{ + return _mesa_float_to_unorm(_mesa_half_to_float(x), dst_bits); +} + +static inline unsigned +_mesa_unorm_to_unorm(unsigned x, unsigned src_bits, unsigned dst_bits) +{ + if (src_bits < dst_bits) { + return EXTEND_NORMALIZED_INT(x, src_bits, dst_bits); + } else { + unsigned src_half = (1 << (src_bits - 1)) - 1; + + if (src_bits + dst_bits > sizeof(x) * 8) { + assert(src_bits + dst_bits <= sizeof(uint64_t) * 8); + return (((uint64_t) x * MAX_UINT(dst_bits) + src_half) / + MAX_UINT(src_bits)); + } else { + return (x * MAX_UINT(dst_bits) + src_half) / MAX_UINT(src_bits); + } + } +} + +static inline unsigned +_mesa_snorm_to_unorm(int x, unsigned src_bits, unsigned dst_bits) +{ + if (x < 0) + return 0; + else + return _mesa_unorm_to_unorm(x, src_bits - 1, dst_bits); +} + +static inline int +_mesa_float_to_snorm(float x, unsigned dst_bits) +{ + if (x < -1.0f) + return -MAX_INT(dst_bits); + else if (x > 1.0f) + return MAX_INT(dst_bits); + else + return F_TO_I(x * MAX_INT(dst_bits)); +} + +static inline int +_mesa_half_to_snorm(uint16_t x, unsigned dst_bits) +{ + return _mesa_float_to_snorm(_mesa_half_to_float(x), dst_bits); +} + +static inline int +_mesa_unorm_to_snorm(unsigned x, unsigned src_bits, unsigned dst_bits) +{ + return _mesa_unorm_to_unorm(x, src_bits, dst_bits - 1); +} + +static inline int +_mesa_snorm_to_snorm(int x, unsigned src_bits, unsigned dst_bits) +{ + if (x < -MAX_INT(src_bits)) + return -MAX_INT(dst_bits); + else if (src_bits < dst_bits) + return EXTEND_NORMALIZED_INT(x, src_bits - 1, dst_bits - 1); + else + return x >> (src_bits - dst_bits); +} + +static inline unsigned +_mesa_unsigned_to_unsigned(unsigned src, unsigned dst_size) +{ + return MIN2(src, MAX_UINT(dst_size)); +} + +static inline int +_mesa_unsigned_to_signed(unsigned src, unsigned dst_size) +{ + return MIN2(src, (unsigned)MAX_INT(dst_size)); +} + +static inline int +_mesa_signed_to_signed(int src, unsigned dst_size) +{ + return CLAMP(src, MIN_INT(dst_size), MAX_INT(dst_size)); +} + +static inline unsigned +_mesa_signed_to_unsigned(int src, unsigned dst_size) +{ + return CLAMP(src, 0, MAX_UINT(dst_size)); +} + +static inline unsigned +_mesa_float_to_unsigned(float src, unsigned dst_bits) +{ + if (src < 0.0f) + return 0; + if (src > (float)MAX_UINT(dst_bits)) + return MAX_UINT(dst_bits); + return _mesa_signed_to_unsigned(src, dst_bits); +} + +static inline unsigned +_mesa_float_to_signed(float src, unsigned dst_bits) +{ + if (src < (float)(-MAX_INT(dst_bits))) + return -MAX_INT(dst_bits); + if (src > (float)MAX_INT(dst_bits)) + return MAX_INT(dst_bits); + return _mesa_signed_to_signed(src, dst_bits); +} + +static inline unsigned +_mesa_half_to_unsigned(uint16_t src, unsigned dst_bits) +{ + if (_mesa_half_is_negative(src)) + return 0; + return _mesa_unsigned_to_unsigned(_mesa_float_to_half(src), dst_bits); +} + +static inline unsigned +_mesa_half_to_signed(uint16_t src, unsigned dst_bits) +{ + return _mesa_float_to_signed(_mesa_half_to_float(src), dst_bits); +} bool _mesa_format_to_array(mesa_format, GLenum *type, int *num_components, uint8_t swizzle[4], bool *normalized); void -_mesa_swizzle_and_convert(void *dst, GLenum dst_type, int num_dst_channels, - const void *src, GLenum src_type, int num_src_channels, +_mesa_swizzle_and_convert(void *dst, + enum mesa_array_format_datatype dst_type, + int num_dst_channels, + const void *src, + enum mesa_array_format_datatype src_type, + int num_src_channels, const uint8_t swizzle[4], bool normalized, int count); +bool +_mesa_compute_rgba2base2rgba_component_mapping(GLenum baseFormat, uint8_t *map); + +void +_mesa_format_convert(void *void_dst, uint32_t dst_format, size_t dst_stride, + void *void_src, uint32_t src_format, size_t src_stride, + size_t width, size_t height, uint8_t *rebase_swizzle); + #endif |