mesa/format_utils: Add a general format conversion function
Most format conversion operations required by GL can be performed by converting one channel at a time, shuffling the channels around, and optionally filling missing channels with zeros and ones. This adds a function to do just that in a general, yet efficient, way. v2: * Add better comments including full docs for functions * Don't use __typeof__ * Use inline helpers instead of writing out conversions by hand, * Force full loop unrolling for better performance v3: Add another set of parens around the MAX_INT macro Signed-off-by: Jason Ekstrand <jason.ekstrand@intel.com> Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Jason Ekstrand
@@ -51,6 +51,7 @@ MAIN_FILES = \
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$(SRCDIR)main/formats.c \
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$(SRCDIR)main/format_pack.c \
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$(SRCDIR)main/format_unpack.c \
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$(SRCDIR)main/format_utils.c \
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$(SRCDIR)main/framebuffer.c \
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$(SRCDIR)main/get.c \
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$(SRCDIR)main/genmipmap.c \
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870
src/mesa/main/format_utils.c
Normal file
870
src/mesa/main/format_utils.c
Normal file
@@ -0,0 +1,870 @@
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/*
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* Mesa 3-D graphics library
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*
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* Copyright (C) 2014 Intel Corporation All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "format_utils.h"
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#include "glformats.h"
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/* A bunch of format conversion macros and helper functions used below */
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/* Only guaranteed to work for BITS <= 32 */
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#define MAX_UINT(BITS) ((BITS) == 32 ? UINT32_MAX : ((1u << (BITS)) - 1))
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#define MAX_INT(BITS) ((int)MAX_UINT((BITS) - 1))
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/* Extends an integer of size SRC_BITS to one of size DST_BITS linearly */
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#define EXTEND_NORMALIZED_INT(X, SRC_BITS, DST_BITS) \
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(((X) * (int)(MAX_UINT(DST_BITS) / MAX_UINT(SRC_BITS))) + \
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((DST_BITS % SRC_BITS) ? ((X) >> (SRC_BITS - DST_BITS % SRC_BITS)) : 0))
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static inline float
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unorm_to_float(unsigned x, unsigned src_bits)
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{
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return x * (1.0f / (float)MAX_UINT(src_bits));
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}
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static inline float
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snorm_to_float(int x, unsigned src_bits)
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{
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if (x == -MAX_INT(src_bits))
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return -1.0f;
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else
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return x * (1.0f / (float)MAX_INT(src_bits));
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}
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static inline uint16_t
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unorm_to_half(unsigned x, unsigned src_bits)
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{
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return _mesa_float_to_half(unorm_to_float(x, src_bits));
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}
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static inline uint16_t
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snorm_to_half(int x, unsigned src_bits)
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{
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return _mesa_float_to_half(snorm_to_float(x, src_bits));
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}
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static inline unsigned
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float_to_unorm(float x, unsigned dst_bits)
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{
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if (x < 0.0f)
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return 0;
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else if (x > 1.0f)
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return MAX_UINT(dst_bits);
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else
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return F_TO_I(x * MAX_UINT(dst_bits));
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}
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static inline unsigned
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half_to_unorm(uint16_t x, unsigned dst_bits)
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{
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return float_to_unorm(_mesa_half_to_float(x), dst_bits);
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}
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static inline unsigned
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unorm_to_unorm(unsigned x, unsigned src_bits, unsigned dst_bits)
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{
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if (src_bits < dst_bits)
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return EXTEND_NORMALIZED_INT(x, src_bits, dst_bits);
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else
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return x >> (src_bits - dst_bits);
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}
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static inline unsigned
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snorm_to_unorm(int x, unsigned src_bits, unsigned dst_bits)
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{
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if (x < 0)
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return 0;
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else
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return unorm_to_unorm(x, src_bits - 1, dst_bits);
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}
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static inline int
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float_to_snorm(float x, unsigned dst_bits)
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{
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if (x < -1.0f)
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return -MAX_INT(dst_bits);
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else if (x > 1.0f)
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return MAX_INT(dst_bits);
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else
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return F_TO_I(x * MAX_INT(dst_bits));
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}
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static inline int
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half_to_snorm(uint16_t x, unsigned dst_bits)
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{
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return float_to_snorm(_mesa_half_to_float(x), dst_bits);
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}
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static inline int
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unorm_to_snorm(unsigned x, unsigned src_bits, unsigned dst_bits)
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{
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return unorm_to_unorm(x, src_bits, dst_bits - 1);
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}
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static inline int
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snorm_to_snorm(int x, unsigned src_bits, unsigned dst_bits)
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{
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if (x < -MAX_INT(src_bits))
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return -MAX_INT(dst_bits);
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else if (src_bits < dst_bits)
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return EXTEND_NORMALIZED_INT(x, src_bits - 1, dst_bits - 1);
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else
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return x >> (src_bits - dst_bits);
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}
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static inline unsigned
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float_to_uint(float x)
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{
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if (x < 0.0f)
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return 0;
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else
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return x;
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}
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static inline unsigned
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half_to_uint(uint16_t x)
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{
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if (_mesa_half_is_negative(x))
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return 0;
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else
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return _mesa_float_to_half(x);
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}
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/**
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* Attempts to perform the given swizzle-and-convert operation with memcpy
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*
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* This function determines if the given swizzle-and-convert operation can
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* be done with a simple memcpy and, if so, does the memcpy. If not, it
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* returns false and we fall back to the standard version below.
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*
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* The arguments are exactly the same as for _mesa_swizzle_and_convert
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*
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* \return true if it successfully performed the swizzle-and-convert
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* operation with memcpy, false otherwise
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*/
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static bool
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swizzle_convert_try_memcpy(void *dst, GLenum dst_type, int num_dst_channels,
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const void *src, GLenum src_type, int num_src_channels,
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const uint8_t swizzle[4], bool normalized, int count)
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{
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int i;
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if (src_type != dst_type)
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return false;
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if (num_src_channels != num_dst_channels)
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return false;
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for (i = 0; i < num_dst_channels; ++i)
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if (swizzle[i] != i && swizzle[i] != MESA_FORMAT_SWIZZLE_NONE)
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return false;
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memcpy(dst, src, count * num_src_channels * _mesa_sizeof_type(src_type));
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return true;
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}
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/**
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* Represents a single instance of the standard swizzle-and-convert loop
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*
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* Any swizzle-and-convert operation simply loops through the pixels and
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* performs the transformation operation one pixel at a time. This macro
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* embodies one instance of the conversion loop. This way we can do all
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* control flow outside of the loop and allow the compiler to unroll
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* everything inside the loop.
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*
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* Note: This loop is carefully crafted for performance. Be careful when
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* changing it and run some benchmarks to ensure no performance regressions
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* if you do.
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*
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* \param DST_TYPE the C datatype of the destination
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* \param DST_CHANS the number of destination channels
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* \param SRC_TYPE the C datatype of the source
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* \param SRC_CHANS the number of source channels
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* \param CONV an expression for converting from the source data,
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* storred in the variable "src", to the destination
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* format
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*/
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#define SWIZZLE_CONVERT_LOOP(DST_TYPE, DST_CHANS, SRC_TYPE, SRC_CHANS, CONV) \
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for (s = 0; s < count; ++s) { \
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for (j = 0; j < SRC_CHANS; ++j) { \
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SRC_TYPE src = typed_src[j]; \
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tmp[j] = CONV; \
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} \
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\
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typed_dst[0] = tmp[swizzle_x]; \
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if (DST_CHANS > 1) { \
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typed_dst[1] = tmp[swizzle_y]; \
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if (DST_CHANS > 2) { \
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typed_dst[2] = tmp[swizzle_z]; \
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if (DST_CHANS > 3) { \
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typed_dst[3] = tmp[swizzle_w]; \
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} \
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} \
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} \
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typed_src += SRC_CHANS; \
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typed_dst += DST_CHANS; \
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} \
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/**
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* Represents a single swizzle-and-convert operation
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*
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* This macro represents everything done in a single swizzle-and-convert
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* operation. The actual work is done by the SWIZZLE_CONVERT_LOOP macro.
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* This macro acts as a wrapper that uses a nested switch to ensure that
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* all looping parameters get unrolled.
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*
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* This macro makes assumptions about variables etc. in the calling
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* function. Changes to _mesa_swizzle_and_convert may require changes to
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* this macro.
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*
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* \param DST_TYPE the C datatype of the destination
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* \param SRC_TYPE the C datatype of the source
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* \param CONV an expression for converting from the source data,
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* storred in the variable "src", to the destination
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* format
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*/
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#define SWIZZLE_CONVERT(DST_TYPE, SRC_TYPE, CONV) \
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do { \
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const SRC_TYPE *typed_src = void_src; \
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DST_TYPE *typed_dst = void_dst; \
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DST_TYPE tmp[7]; \
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tmp[4] = 0; \
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tmp[5] = one; \
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switch (num_dst_channels) { \
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case 1: \
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switch (num_src_channels) { \
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case 1: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 1, CONV) \
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break; \
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case 2: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 2, CONV) \
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break; \
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case 3: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 3, CONV) \
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break; \
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case 4: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 4, CONV) \
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break; \
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} \
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break; \
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case 2: \
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switch (num_src_channels) { \
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case 1: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 1, CONV) \
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break; \
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case 2: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 2, CONV) \
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break; \
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case 3: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 3, CONV) \
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break; \
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case 4: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 4, CONV) \
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break; \
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} \
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break; \
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case 3: \
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switch (num_src_channels) { \
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case 1: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 1, CONV) \
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break; \
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case 2: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 2, CONV) \
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break; \
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case 3: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 3, CONV) \
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break; \
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case 4: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 4, CONV) \
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break; \
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} \
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break; \
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case 4: \
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switch (num_src_channels) { \
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case 1: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 1, CONV) \
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break; \
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case 2: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 2, CONV) \
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break; \
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case 3: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 3, CONV) \
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break; \
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case 4: \
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SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 4, CONV) \
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break; \
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} \
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break; \
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} \
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} while (0);
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/**
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* Convert between array-based color formats.
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*
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* Most format conversion operations required by GL can be performed by
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* converting one channel at a time, shuffling the channels around, and
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* optionally filling missing channels with zeros and ones. This function
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* does just that in a general, yet efficient, way.
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*
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* The swizzle parameter is an array of 4 numbers (see
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* _mesa_get_format_swizzle) that describes where each channel in the
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* destination should come from in the source. If swizzle[i] < 4 then it
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* means that dst[i] = CONVERT(src[swizzle[i]]). If swizzle[i] is
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* MESA_FORMAT_SWIZZLE_ZERO or MESA_FORMAT_SWIZZLE_ONE, the corresponding
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* dst[i] will be filled with the appropreate representation of zero or one
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* respectively.
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*
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* Under most circumstances, the source and destination images must be
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* different as no care is taken not to clobber one with the other.
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* However, if they have the same number of bits per pixel, it is safe to
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* do an in-place conversion.
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*
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* \param[out] dst pointer to where the converted data should
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* be stored
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*
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* \param[in] dst_type the destination GL type of the converted
|
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* data (GL_BYTE, etc.)
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*
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* \param[in] num_dst_channels the number of channels in the converted
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* data
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*
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* \param[in] src pointer to the source data
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*
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* \param[in] src_type the GL type of the source data (GL_BYTE,
|
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* etc.)
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*
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* \param[in] num_src_channels the number of channels in the source data
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* (the number of channels total, not just
|
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* the number used)
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*
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* \param[in] swizzle describes how to get the destination data
|
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* from the source data.
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*
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* \param[in] normalized for integer types, this indicates whether
|
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* the data should be considered as integers
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* or as normalized integers;
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*
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* \param[in] count the number of pixels to convert
|
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*/
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void
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_mesa_swizzle_and_convert(void *void_dst, GLenum dst_type, int num_dst_channels,
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const void *void_src, GLenum src_type, int num_src_channels,
|
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const uint8_t swizzle[4], bool normalized, int count)
|
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{
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int s, j;
|
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register uint8_t swizzle_x, swizzle_y, swizzle_z, swizzle_w;
|
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if (swizzle_convert_try_memcpy(void_dst, dst_type, num_dst_channels,
|
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void_src, src_type, num_src_channels,
|
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swizzle, normalized, count))
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return;
|
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swizzle_x = swizzle[0];
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swizzle_y = swizzle[1];
|
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swizzle_z = swizzle[2];
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swizzle_w = swizzle[3];
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||||
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switch (dst_type) {
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case GL_FLOAT:
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{
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const float one = 1.0f;
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switch (src_type) {
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case GL_FLOAT:
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SWIZZLE_CONVERT(float, float, src)
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break;
|
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case GL_HALF_FLOAT:
|
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SWIZZLE_CONVERT(float, uint16_t, _mesa_half_to_float(src))
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break;
|
||||
case GL_UNSIGNED_BYTE:
|
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if (normalized) {
|
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SWIZZLE_CONVERT(float, uint8_t, unorm_to_float(src, 8))
|
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} else {
|
||||
SWIZZLE_CONVERT(float, uint8_t, src)
|
||||
}
|
||||
break;
|
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case GL_BYTE:
|
||||
if (normalized) {
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SWIZZLE_CONVERT(float, int8_t, snorm_to_float(src, 8))
|
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} else {
|
||||
SWIZZLE_CONVERT(float, int8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(float, uint16_t, unorm_to_float(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(float, uint16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(float, int16_t, snorm_to_float(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(float, int16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(float, uint32_t, unorm_to_float(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(float, uint32_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(float, int32_t, snorm_to_float(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(float, int32_t, src)
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
{
|
||||
const uint16_t one = _mesa_float_to_half(1.0f);
|
||||
switch (src_type) {
|
||||
case GL_FLOAT:
|
||||
SWIZZLE_CONVERT(uint16_t, float, _mesa_float_to_half(src))
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, src)
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, uint8_t, unorm_to_half(src, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, uint8_t, _mesa_float_to_half(src))
|
||||
}
|
||||
break;
|
||||
case GL_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, int8_t, snorm_to_half(src, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, int8_t, _mesa_float_to_half(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, unorm_to_half(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_float_to_half(src))
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, int16_t, snorm_to_half(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, int16_t, _mesa_float_to_half(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, uint32_t, unorm_to_half(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, uint32_t, _mesa_float_to_half(src))
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, int32_t, snorm_to_half(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, int32_t, _mesa_float_to_half(src))
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
{
|
||||
const uint8_t one = normalized ? UINT8_MAX : 1;
|
||||
switch (src_type) {
|
||||
case GL_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, float, float_to_unorm(src, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, float, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, uint16_t, half_to_unorm(src, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, uint16_t, half_to_uint(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
SWIZZLE_CONVERT(uint8_t, uint8_t, src)
|
||||
break;
|
||||
case GL_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, int8_t, snorm_to_unorm(src, 8, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, int8_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, uint16_t, unorm_to_unorm(src, 16, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, uint16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, int16_t, snorm_to_unorm(src, 16, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, int16_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, uint32_t, unorm_to_unorm(src, 32, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, uint32_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, int32_t, snorm_to_unorm(src, 32, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, int32_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case GL_BYTE:
|
||||
{
|
||||
const int8_t one = normalized ? INT8_MAX : 1;
|
||||
switch (src_type) {
|
||||
case GL_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, float, float_to_snorm(src, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, float, src)
|
||||
}
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint8_t, uint16_t, half_to_snorm(src, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint8_t, uint16_t, _mesa_half_to_float(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int8_t, uint8_t, unorm_to_snorm(src, 8, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int8_t, uint8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_BYTE:
|
||||
SWIZZLE_CONVERT(int8_t, int8_t, src)
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int8_t, uint16_t, unorm_to_snorm(src, 16, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int8_t, uint16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int8_t, int16_t, snorm_to_snorm(src, 16, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int8_t, int16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int8_t, uint32_t, unorm_to_snorm(src, 32, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int8_t, uint32_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int8_t, int32_t, snorm_to_snorm(src, 32, 8))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int8_t, int32_t, src)
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
{
|
||||
const uint16_t one = normalized ? UINT16_MAX : 1;
|
||||
switch (src_type) {
|
||||
case GL_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, float, float_to_unorm(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, float, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, half_to_unorm(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, half_to_uint(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, uint8_t, unorm_to_unorm(src, 8, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, uint8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, int8_t, snorm_to_unorm(src, 8, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, int8_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, src)
|
||||
break;
|
||||
case GL_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, int16_t, snorm_to_unorm(src, 16, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, int16_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, uint32_t, unorm_to_unorm(src, 32, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, uint32_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, int32_t, snorm_to_unorm(src, 32, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, int32_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
{
|
||||
const int16_t one = normalized ? INT16_MAX : 1;
|
||||
switch (src_type) {
|
||||
case GL_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, float, float_to_snorm(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, float, src)
|
||||
}
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, half_to_snorm(src, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_half_to_float(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int16_t, uint8_t, unorm_to_snorm(src, 8, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int16_t, uint8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int16_t, int8_t, snorm_to_snorm(src, 8, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int16_t, int8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int16_t, uint16_t, unorm_to_snorm(src, 16, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int16_t, uint16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
SWIZZLE_CONVERT(int16_t, int16_t, src)
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int16_t, uint32_t, unorm_to_snorm(src, 32, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int16_t, uint32_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int16_t, int32_t, snorm_to_snorm(src, 32, 16))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int16_t, int32_t, src)
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
{
|
||||
const uint32_t one = normalized ? UINT32_MAX : 1;
|
||||
switch (src_type) { case GL_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, float, float_to_unorm(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, float, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, uint16_t, half_to_unorm(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, uint16_t, half_to_uint(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, uint8_t, unorm_to_unorm(src, 8, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, uint8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, int8_t, snorm_to_unorm(src, 8, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, int8_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, uint16_t, unorm_to_unorm(src, 16, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, uint16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, int16_t, snorm_to_unorm(src, 16, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, int16_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
SWIZZLE_CONVERT(uint32_t, uint32_t, src)
|
||||
break;
|
||||
case GL_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, int32_t, snorm_to_unorm(src, 32, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, int32_t, (src < 0) ? 0 : src)
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
{
|
||||
const int32_t one = normalized ? INT32_MAX : 1;
|
||||
switch (src_type) {
|
||||
case GL_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, float, float_to_snorm(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, float, src)
|
||||
}
|
||||
break;
|
||||
case GL_HALF_FLOAT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(uint32_t, uint16_t, half_to_snorm(src, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(uint32_t, uint16_t, _mesa_half_to_float(src))
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int32_t, uint8_t, unorm_to_snorm(src, 8, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int32_t, uint8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_BYTE:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int32_t, int8_t, snorm_to_snorm(src, 8, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int32_t, int8_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int32_t, uint16_t, unorm_to_snorm(src, 16, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int32_t, uint16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_SHORT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int32_t, int16_t, snorm_to_snorm(src, 16, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int32_t, int16_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_UNSIGNED_INT:
|
||||
if (normalized) {
|
||||
SWIZZLE_CONVERT(int32_t, uint32_t, unorm_to_snorm(src, 32, 32))
|
||||
} else {
|
||||
SWIZZLE_CONVERT(int32_t, uint32_t, src)
|
||||
}
|
||||
break;
|
||||
case GL_INT:
|
||||
SWIZZLE_CONVERT(int32_t, int32_t, src)
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type combination");
|
||||
}
|
||||
}
|
||||
break;
|
||||
default:
|
||||
assert(!"Invalid channel type");
|
||||
}
|
||||
}
|
||||
41
src/mesa/main/format_utils.h
Normal file
41
src/mesa/main/format_utils.h
Normal file
@@ -0,0 +1,41 @@
|
||||
/**
|
||||
* \file format_utils.h
|
||||
* A collection of format conversion utility functions.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Mesa 3-D graphics library
|
||||
*
|
||||
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
|
||||
* Copyright (C) 2014 Intel Corporation All Rights Reserved.
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a
|
||||
* copy of this software and associated documentation files (the "Software"),
|
||||
* to deal in the Software without restriction, including without limitation
|
||||
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||||
* and/or sell copies of the Software, and to permit persons to whom the
|
||||
* Software is furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included
|
||||
* in all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
||||
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
||||
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
||||
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
||||
* OTHER DEALINGS IN THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#ifndef FORMAT_UTILS_H
|
||||
#define FORMAT_UTILS_H
|
||||
|
||||
#include "imports.h"
|
||||
|
||||
void
|
||||
_mesa_swizzle_and_convert(void *dst, GLenum dst_type, int num_dst_channels,
|
||||
const void *src, GLenum src_type, int num_src_channels,
|
||||
const uint8_t swizzle[4], bool normalized, int count);
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user