/* * Mesa 3-D graphics library * * 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. */ #include "format_utils.h" #include "glformats.h" static const uint8_t map_identity[7] = { 0, 1, 2, 3, 4, 5, 6 }; static const uint8_t map_3210[7] = { 3, 2, 1, 0, 4, 5, 6 }; static const uint8_t map_1032[7] = { 1, 0, 3, 2, 4, 5, 6 }; /** * Describes a format as an array format, if possible * * A helper function for figuring out if a (possibly packed) format is * actually an array format and, if so, what the array parameters are. * * \param[in] format the mesa format * \param[out] type the GL type of the array (GL_BYTE, etc.) * \param[out] num_components the number of components in the array * \param[out] swizzle a swizzle describing how to get from the * given format to RGBA * \param[out] normalized for integer formats, this represents whether * the format is a normalized integer or a * regular integer * \return true if this format is an array format, false otherwise */ bool _mesa_format_to_array(mesa_format format, GLenum *type, int *num_components, uint8_t swizzle[4], bool *normalized) { int i; GLuint format_components; uint8_t packed_swizzle[4]; const uint8_t *endian; if (_mesa_is_format_compressed(format)) return false; *normalized = !_mesa_is_format_integer(format); _mesa_format_to_type_and_comps(format, type, &format_components); switch (_mesa_get_format_layout(format)) { case MESA_FORMAT_LAYOUT_ARRAY: *num_components = format_components; _mesa_get_format_swizzle(format, swizzle); return true; case MESA_FORMAT_LAYOUT_PACKED: switch (*type) { case GL_UNSIGNED_BYTE: case GL_BYTE: if (_mesa_get_format_max_bits(format) != 8) return false; *num_components = _mesa_get_format_bytes(format); switch (*num_components) { case 1: endian = map_identity; break; case 2: endian = _mesa_little_endian() ? map_identity : map_1032; break; case 4: endian = _mesa_little_endian() ? map_identity : map_3210; break; default: endian = map_identity; assert(!"Invalid number of components"); } break; case GL_UNSIGNED_SHORT: case GL_SHORT: case GL_HALF_FLOAT: if (_mesa_get_format_max_bits(format) != 16) return false; *num_components = _mesa_get_format_bytes(format) / 2; switch (*num_components) { case 1: endian = map_identity; break; case 2: endian = _mesa_little_endian() ? map_identity : map_1032; break; default: endian = map_identity; assert(!"Invalid number of components"); } break; case GL_UNSIGNED_INT: case GL_INT: case GL_FLOAT: /* This isn't packed. At least not really. */ assert(format_components == 1); if (_mesa_get_format_max_bits(format) != 32) return false; *num_components = format_components; endian = map_identity; break; default: return false; } _mesa_get_format_swizzle(format, packed_swizzle); for (i = 0; i < 4; ++i) swizzle[i] = endian[packed_swizzle[i]]; return true; case MESA_FORMAT_LAYOUT_OTHER: default: return false; } } /* A bunch of format conversion macros and helper functions used below */ /* 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)) /* 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 unorm_to_float(unsigned x, unsigned src_bits) { return x * (1.0f / (float)MAX_UINT(src_bits)); } static inline float 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 unorm_to_half(unsigned x, unsigned src_bits) { return _mesa_float_to_half(unorm_to_float(x, src_bits)); } static inline uint16_t snorm_to_half(int x, unsigned src_bits) { return _mesa_float_to_half(snorm_to_float(x, src_bits)); } static inline unsigned 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 half_to_unorm(uint16_t x, unsigned dst_bits) { return float_to_unorm(_mesa_half_to_float(x), dst_bits); } static inline unsigned 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 return x >> (src_bits - dst_bits); } static inline unsigned snorm_to_unorm(int x, unsigned src_bits, unsigned dst_bits) { if (x < 0) return 0; else return unorm_to_unorm(x, src_bits - 1, dst_bits); } static inline int 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 half_to_snorm(uint16_t x, unsigned dst_bits) { return float_to_snorm(_mesa_half_to_float(x), dst_bits); } static inline int unorm_to_snorm(unsigned x, unsigned src_bits, unsigned dst_bits) { return unorm_to_unorm(x, src_bits, dst_bits - 1); } static inline int 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 float_to_uint(float x) { if (x < 0.0f) return 0; else return x; } static inline unsigned half_to_uint(uint16_t x) { if (_mesa_half_is_negative(x)) return 0; else return _mesa_float_to_half(x); } /** * Attempts to perform the given swizzle-and-convert operation with memcpy * * This function determines if the given swizzle-and-convert operation can * be done with a simple memcpy and, if so, does the memcpy. If not, it * returns false and we fall back to the standard version below. * * The arguments are exactly the same as for _mesa_swizzle_and_convert * * \return true if it successfully performed the swizzle-and-convert * operation with memcpy, false otherwise */ static bool swizzle_convert_try_memcpy(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) { int i; if (src_type != dst_type) return false; if (num_src_channels != num_dst_channels) return false; for (i = 0; i < num_dst_channels; ++i) if (swizzle[i] != i && swizzle[i] != MESA_FORMAT_SWIZZLE_NONE) return false; memcpy(dst, src, count * num_src_channels * _mesa_sizeof_type(src_type)); return true; } /** * Represents a single instance of the standard swizzle-and-convert loop * * Any swizzle-and-convert operation simply loops through the pixels and * performs the transformation operation one pixel at a time. This macro * embodies one instance of the conversion loop. This way we can do all * control flow outside of the loop and allow the compiler to unroll * everything inside the loop. * * Note: This loop is carefully crafted for performance. Be careful when * changing it and run some benchmarks to ensure no performance regressions * if you do. * * \param DST_TYPE the C datatype of the destination * \param DST_CHANS the number of destination channels * \param SRC_TYPE the C datatype of the source * \param SRC_CHANS the number of source channels * \param CONV an expression for converting from the source data, * storred in the variable "src", to the destination * format */ #define SWIZZLE_CONVERT_LOOP(DST_TYPE, DST_CHANS, SRC_TYPE, SRC_CHANS, CONV) \ for (s = 0; s < count; ++s) { \ for (j = 0; j < SRC_CHANS; ++j) { \ SRC_TYPE src = typed_src[j]; \ tmp[j] = CONV; \ } \ \ typed_dst[0] = tmp[swizzle_x]; \ if (DST_CHANS > 1) { \ typed_dst[1] = tmp[swizzle_y]; \ if (DST_CHANS > 2) { \ typed_dst[2] = tmp[swizzle_z]; \ if (DST_CHANS > 3) { \ typed_dst[3] = tmp[swizzle_w]; \ } \ } \ } \ typed_src += SRC_CHANS; \ typed_dst += DST_CHANS; \ } \ /** * Represents a single swizzle-and-convert operation * * This macro represents everything done in a single swizzle-and-convert * operation. The actual work is done by the SWIZZLE_CONVERT_LOOP macro. * This macro acts as a wrapper that uses a nested switch to ensure that * all looping parameters get unrolled. * * This macro makes assumptions about variables etc. in the calling * function. Changes to _mesa_swizzle_and_convert may require changes to * this macro. * * \param DST_TYPE the C datatype of the destination * \param SRC_TYPE the C datatype of the source * \param CONV an expression for converting from the source data, * storred in the variable "src", to the destination * format */ #define SWIZZLE_CONVERT(DST_TYPE, SRC_TYPE, CONV) \ do { \ const SRC_TYPE *typed_src = void_src; \ DST_TYPE *typed_dst = void_dst; \ DST_TYPE tmp[7]; \ tmp[4] = 0; \ tmp[5] = one; \ switch (num_dst_channels) { \ case 1: \ switch (num_src_channels) { \ case 1: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 1, CONV) \ break; \ case 2: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 2, CONV) \ break; \ case 3: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 3, CONV) \ break; \ case 4: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 4, CONV) \ break; \ } \ break; \ case 2: \ switch (num_src_channels) { \ case 1: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 1, CONV) \ break; \ case 2: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 2, CONV) \ break; \ case 3: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 3, CONV) \ break; \ case 4: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 4, CONV) \ break; \ } \ break; \ case 3: \ switch (num_src_channels) { \ case 1: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 1, CONV) \ break; \ case 2: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 2, CONV) \ break; \ case 3: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 3, CONV) \ break; \ case 4: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 4, CONV) \ break; \ } \ break; \ case 4: \ switch (num_src_channels) { \ case 1: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 1, CONV) \ break; \ case 2: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 2, CONV) \ break; \ case 3: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 3, CONV) \ break; \ case 4: \ SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 4, CONV) \ break; \ } \ break; \ } \ } while (0); /** * Convert between array-based color formats. * * 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 function * does just that in a general, yet efficient, way. * * The swizzle parameter is an array of 4 numbers (see * _mesa_get_format_swizzle) that describes where each channel in the * destination should come from in the source. If swizzle[i] < 4 then it * means that dst[i] = CONVERT(src[swizzle[i]]). If swizzle[i] is * MESA_FORMAT_SWIZZLE_ZERO or MESA_FORMAT_SWIZZLE_ONE, the corresponding * dst[i] will be filled with the appropreate representation of zero or one * respectively. * * Under most circumstances, the source and destination images must be * different as no care is taken not to clobber one with the other. * However, if they have the same number of bits per pixel, it is safe to * do an in-place conversion. * * \param[out] dst pointer to where the converted data should * be stored * * \param[in] dst_type the destination GL type of the converted * data (GL_BYTE, etc.) * * \param[in] num_dst_channels the number of channels in the converted * data * * \param[in] src pointer to the source data * * \param[in] src_type the GL type of the source data (GL_BYTE, * etc.) * * \param[in] num_src_channels the number of channels in the source data * (the number of channels total, not just * the number used) * * \param[in] swizzle describes how to get the destination data * from the source data. * * \param[in] normalized for integer types, this indicates whether * the data should be considered as integers * or as normalized integers; * * \param[in] count the number of pixels to convert */ void _mesa_swizzle_and_convert(void *void_dst, GLenum dst_type, int num_dst_channels, const void *void_src, GLenum src_type, int num_src_channels, const uint8_t swizzle[4], bool normalized, int count) { int s, j; register uint8_t swizzle_x, swizzle_y, swizzle_z, swizzle_w; if (swizzle_convert_try_memcpy(void_dst, dst_type, num_dst_channels, void_src, src_type, num_src_channels, swizzle, normalized, count)) return; swizzle_x = swizzle[0]; swizzle_y = swizzle[1]; swizzle_z = swizzle[2]; swizzle_w = swizzle[3]; switch (dst_type) { case GL_FLOAT: { const float one = 1.0f; switch (src_type) { case GL_FLOAT: SWIZZLE_CONVERT(float, float, src) break; case GL_HALF_FLOAT: SWIZZLE_CONVERT(float, uint16_t, _mesa_half_to_float(src)) break; case GL_UNSIGNED_BYTE: if (normalized) { SWIZZLE_CONVERT(float, uint8_t, unorm_to_float(src, 8)) } else { SWIZZLE_CONVERT(float, uint8_t, src) } break; case GL_BYTE: if (normalized) { SWIZZLE_CONVERT(float, int8_t, snorm_to_float(src, 8)) } 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"); } }