bfc3ce3157
The old Un*x (autotools-based) build system always auto-generated this file, but that behavior was more or less a relic of the days before the libjpeg-turbo colorspace extensions were implemented. The thinking was that, if a particular developer wanted to change RGB_RED, RGB_GREEN, RGB_BLUE, or RGB_PIXELSIZE in order to compress from/decompress to different RGB pixel layouts, then the SIMD extensions should automatically respond to those changes whenever they were made to jmorecfg.h. The modern reality is that changing RGB_* is no longer necessary because of the libjpeg-turbo colorspace extensions, and changing any of the other constants in jsimdcfg.inc can't be done without making deeper modifications to the SIMD extensions. In general, we treat RGB_* as a de facto, immutable part of the legacy libpjeg API. Realistically, since the values of those constants have been the same in every Un*x distribution released in the past 20-30 years, any software that uses a system-supplied build of libjpeg must assume that those constants will have default values. Furthermore, even if it made sense to auto-generate jsimdcfg.inc, it was never possible to do so on Windows, so it was always going to be necessary to manually generate the Windows version of the file whenever any of the constants changed. This commit introduces a new custom CMake target called "jsimdcfg" that can be used, on Un*x platforms, to generate jsimdcfg.inc on demand, although this should only be necessary when introducing new x86 SIMD instructions or making other deep modifications, such as SIMD acceleration for 12-bit JPEGs. For those who may be wondering why we don't do the same thing for win/jconfig.h.in, it's because performing all of the necessary CMake checks to populate that file is very slow on Windows.
132 lines
4.6 KiB
C
132 lines
4.6 KiB
C
// This file generates the include file for the assembly
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// implementations by abusing the C preprocessor.
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//
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// Note: Some things are manually defined as they need to
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// be mapped to NASM types.
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;
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; Automatically generated include file from jsimdcfg.inc.h
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;
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#define JPEG_INTERNALS
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#include "../jpeglib.h"
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#include "../jconfig.h"
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#include "../jmorecfg.h"
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#include "jsimd.h"
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;
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; -- jpeglib.h
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;
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%define _cpp_protection_DCTSIZE DCTSIZE
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%define _cpp_protection_DCTSIZE2 DCTSIZE2
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;
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; -- jmorecfg.h
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;
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%define _cpp_protection_RGB_RED RGB_RED
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%define _cpp_protection_RGB_GREEN RGB_GREEN
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%define _cpp_protection_RGB_BLUE RGB_BLUE
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%define _cpp_protection_RGB_PIXELSIZE RGB_PIXELSIZE
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%define _cpp_protection_EXT_RGB_RED EXT_RGB_RED
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%define _cpp_protection_EXT_RGB_GREEN EXT_RGB_GREEN
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%define _cpp_protection_EXT_RGB_BLUE EXT_RGB_BLUE
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%define _cpp_protection_EXT_RGB_PIXELSIZE EXT_RGB_PIXELSIZE
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%define _cpp_protection_EXT_RGBX_RED EXT_RGBX_RED
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%define _cpp_protection_EXT_RGBX_GREEN EXT_RGBX_GREEN
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%define _cpp_protection_EXT_RGBX_BLUE EXT_RGBX_BLUE
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%define _cpp_protection_EXT_RGBX_PIXELSIZE EXT_RGBX_PIXELSIZE
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%define _cpp_protection_EXT_BGR_RED EXT_BGR_RED
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%define _cpp_protection_EXT_BGR_GREEN EXT_BGR_GREEN
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%define _cpp_protection_EXT_BGR_BLUE EXT_BGR_BLUE
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%define _cpp_protection_EXT_BGR_PIXELSIZE EXT_BGR_PIXELSIZE
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%define _cpp_protection_EXT_BGRX_RED EXT_BGRX_RED
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%define _cpp_protection_EXT_BGRX_GREEN EXT_BGRX_GREEN
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%define _cpp_protection_EXT_BGRX_BLUE EXT_BGRX_BLUE
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%define _cpp_protection_EXT_BGRX_PIXELSIZE EXT_BGRX_PIXELSIZE
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%define _cpp_protection_EXT_XBGR_RED EXT_XBGR_RED
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%define _cpp_protection_EXT_XBGR_GREEN EXT_XBGR_GREEN
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%define _cpp_protection_EXT_XBGR_BLUE EXT_XBGR_BLUE
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%define _cpp_protection_EXT_XBGR_PIXELSIZE EXT_XBGR_PIXELSIZE
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%define _cpp_protection_EXT_XRGB_RED EXT_XRGB_RED
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%define _cpp_protection_EXT_XRGB_GREEN EXT_XRGB_GREEN
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%define _cpp_protection_EXT_XRGB_BLUE EXT_XRGB_BLUE
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%define _cpp_protection_EXT_XRGB_PIXELSIZE EXT_XRGB_PIXELSIZE
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%define RGBX_FILLER_0XFF 1
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; Representation of a single sample (pixel element value).
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; On this SIMD implementation, this must be 'unsigned char'.
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;
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%define JSAMPLE byte ; unsigned char
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%define SIZEOF_JSAMPLE SIZEOF_BYTE ; sizeof(JSAMPLE)
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%define _cpp_protection_CENTERJSAMPLE CENTERJSAMPLE
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; Representation of a DCT frequency coefficient.
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; On this SIMD implementation, this must be 'short'.
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;
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%define JCOEF word ; short
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%define SIZEOF_JCOEF SIZEOF_WORD ; sizeof(JCOEF)
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; Datatype used for image dimensions.
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; On this SIMD implementation, this must be 'unsigned int'.
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;
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%define JDIMENSION dword ; unsigned int
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%define SIZEOF_JDIMENSION SIZEOF_DWORD ; sizeof(JDIMENSION)
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%define JSAMPROW POINTER ; JSAMPLE * (jpeglib.h)
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%define JSAMPARRAY POINTER ; JSAMPROW * (jpeglib.h)
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%define JSAMPIMAGE POINTER ; JSAMPARRAY * (jpeglib.h)
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%define JCOEFPTR POINTER ; JCOEF * (jpeglib.h)
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%define SIZEOF_JSAMPROW SIZEOF_POINTER ; sizeof(JSAMPROW)
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%define SIZEOF_JSAMPARRAY SIZEOF_POINTER ; sizeof(JSAMPARRAY)
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%define SIZEOF_JSAMPIMAGE SIZEOF_POINTER ; sizeof(JSAMPIMAGE)
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%define SIZEOF_JCOEFPTR SIZEOF_POINTER ; sizeof(JCOEFPTR)
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;
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; -- jdct.h
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;
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; A forward DCT routine is given a pointer to a work area of type DCTELEM[];
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; the DCT is to be performed in-place in that buffer.
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; To maximize parallelism, Type DCTELEM is changed to short (originally, int).
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;
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%define DCTELEM word ; short
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%define SIZEOF_DCTELEM SIZEOF_WORD ; sizeof(DCTELEM)
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%define FAST_FLOAT FP32 ; float
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%define SIZEOF_FAST_FLOAT SIZEOF_FP32 ; sizeof(FAST_FLOAT)
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; To maximize parallelism, Type MULTIPLIER is changed to short.
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;
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%define ISLOW_MULT_TYPE word ; must be short
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%define SIZEOF_ISLOW_MULT_TYPE SIZEOF_WORD ; sizeof(ISLOW_MULT_TYPE)
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%define IFAST_MULT_TYPE word ; must be short
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%define SIZEOF_IFAST_MULT_TYPE SIZEOF_WORD ; sizeof(IFAST_MULT_TYPE)
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%define IFAST_SCALE_BITS 2 ; fractional bits in scale factors
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%define FLOAT_MULT_TYPE FP32 ; must be float
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%define SIZEOF_FLOAT_MULT_TYPE SIZEOF_FP32 ; sizeof(FLOAT_MULT_TYPE)
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;
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; -- jsimd.h
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;
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%define _cpp_protection_JSIMD_NONE JSIMD_NONE
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%define _cpp_protection_JSIMD_MMX JSIMD_MMX
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%define _cpp_protection_JSIMD_3DNOW JSIMD_3DNOW
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%define _cpp_protection_JSIMD_SSE JSIMD_SSE
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%define _cpp_protection_JSIMD_SSE2 JSIMD_SSE2
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%define _cpp_protection_JSIMD_AVX2 JSIMD_AVX2
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