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Diffstat (limited to 'src/mesa/main/format_utils.c')
| -rw-r--r-- | src/mesa/main/format_utils.c | 870 |
1 files changed, 870 insertions, 0 deletions
diff --git a/src/mesa/main/format_utils.c b/src/mesa/main/format_utils.c new file mode 100644 index 00000000000..86259696cc8 --- /dev/null +++ b/src/mesa/main/format_utils.c @@ -0,0 +1,870 @@ +/* + * 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" + +/* 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"); + } +} |