01e3032354
libjpeg-turbo has never really supported such compilers, since (AFAIK) they are non-existent on any modern computing platform and thus impossible for us to test. (Also, the TurboJPEG API would break without unsigned chars.) Furthermore, the unified CMake-based build system introduced in 2.0 always defines HAVE_UNSIGNED_CHAR, so retaining other code paths is pointless. Eliminating support for compilers without unsigned char eliminates the need for the GETJSAMPLE() macro, which improves the readability of many parts of the code as well as improving the performance of writing Targa and Windows BMP files. Fixes #317
385 lines
11 KiB
C
385 lines
11 KiB
C
/*
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* jdcol565.c
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*
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* This file was part of the Independent JPEG Group's software:
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* Copyright (C) 1991-1997, Thomas G. Lane.
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* Modifications:
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* Copyright (C) 2013, Linaro Limited.
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* Copyright (C) 2014-2015, D. R. Commander.
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* For conditions of distribution and use, see the accompanying README.ijg
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* file.
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*
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* This file contains output colorspace conversion routines.
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*/
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/* This file is included by jdcolor.c */
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INLINE
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LOCAL(void)
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ycc_rgb565_convert_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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my_cconvert_ptr cconvert = (my_cconvert_ptr)cinfo->cconvert;
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register int y, cb, cr;
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register JSAMPROW outptr;
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register JSAMPROW inptr0, inptr1, inptr2;
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register JDIMENSION col;
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JDIMENSION num_cols = cinfo->output_width;
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/* copy these pointers into registers if possible */
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register JSAMPLE *range_limit = cinfo->sample_range_limit;
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register int *Crrtab = cconvert->Cr_r_tab;
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register int *Cbbtab = cconvert->Cb_b_tab;
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register JLONG *Crgtab = cconvert->Cr_g_tab;
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register JLONG *Cbgtab = cconvert->Cb_g_tab;
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SHIFT_TEMPS
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while (--num_rows >= 0) {
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JLONG rgb;
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unsigned int r, g, b;
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inptr0 = input_buf[0][input_row];
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inptr1 = input_buf[1][input_row];
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inptr2 = input_buf[2][input_row];
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input_row++;
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outptr = *output_buf++;
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if (PACK_NEED_ALIGNMENT(outptr)) {
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y = *inptr0++;
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cb = *inptr1++;
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cr = *inptr2++;
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r = range_limit[y + Crrtab[cr]];
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g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS))];
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b = range_limit[y + Cbbtab[cb]];
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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outptr += 2;
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num_cols--;
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}
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for (col = 0; col < (num_cols >> 1); col++) {
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y = *inptr0++;
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cb = *inptr1++;
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cr = *inptr2++;
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r = range_limit[y + Crrtab[cr]];
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g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS))];
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b = range_limit[y + Cbbtab[cb]];
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rgb = PACK_SHORT_565(r, g, b);
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y = *inptr0++;
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cb = *inptr1++;
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cr = *inptr2++;
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r = range_limit[y + Crrtab[cr]];
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g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS))];
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b = range_limit[y + Cbbtab[cb]];
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rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
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WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
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outptr += 4;
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}
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if (num_cols & 1) {
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y = *inptr0;
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cb = *inptr1;
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cr = *inptr2;
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r = range_limit[y + Crrtab[cr]];
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g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS))];
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b = range_limit[y + Cbbtab[cb]];
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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}
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}
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}
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INLINE
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LOCAL(void)
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ycc_rgb565D_convert_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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my_cconvert_ptr cconvert = (my_cconvert_ptr)cinfo->cconvert;
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register int y, cb, cr;
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register JSAMPROW outptr;
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register JSAMPROW inptr0, inptr1, inptr2;
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register JDIMENSION col;
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JDIMENSION num_cols = cinfo->output_width;
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/* copy these pointers into registers if possible */
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register JSAMPLE *range_limit = cinfo->sample_range_limit;
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register int *Crrtab = cconvert->Cr_r_tab;
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register int *Cbbtab = cconvert->Cb_b_tab;
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register JLONG *Crgtab = cconvert->Cr_g_tab;
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register JLONG *Cbgtab = cconvert->Cb_g_tab;
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JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK];
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SHIFT_TEMPS
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while (--num_rows >= 0) {
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JLONG rgb;
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unsigned int r, g, b;
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inptr0 = input_buf[0][input_row];
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inptr1 = input_buf[1][input_row];
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inptr2 = input_buf[2][input_row];
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input_row++;
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outptr = *output_buf++;
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if (PACK_NEED_ALIGNMENT(outptr)) {
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y = *inptr0++;
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cb = *inptr1++;
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cr = *inptr2++;
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r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
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g = range_limit[DITHER_565_G(y +
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((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS)), d0)];
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b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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outptr += 2;
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num_cols--;
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}
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for (col = 0; col < (num_cols >> 1); col++) {
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y = *inptr0++;
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cb = *inptr1++;
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cr = *inptr2++;
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r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
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g = range_limit[DITHER_565_G(y +
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((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS)), d0)];
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b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
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d0 = DITHER_ROTATE(d0);
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rgb = PACK_SHORT_565(r, g, b);
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y = *inptr0++;
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cb = *inptr1++;
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cr = *inptr2++;
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r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
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g = range_limit[DITHER_565_G(y +
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((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS)), d0)];
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b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
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d0 = DITHER_ROTATE(d0);
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rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
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WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
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outptr += 4;
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}
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if (num_cols & 1) {
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y = *inptr0;
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cb = *inptr1;
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cr = *inptr2;
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r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
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g = range_limit[DITHER_565_G(y +
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((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
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SCALEBITS)), d0)];
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b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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}
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}
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}
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INLINE
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LOCAL(void)
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rgb_rgb565_convert_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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register JSAMPROW outptr;
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register JSAMPROW inptr0, inptr1, inptr2;
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register JDIMENSION col;
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JDIMENSION num_cols = cinfo->output_width;
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SHIFT_TEMPS
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while (--num_rows >= 0) {
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JLONG rgb;
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unsigned int r, g, b;
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inptr0 = input_buf[0][input_row];
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inptr1 = input_buf[1][input_row];
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inptr2 = input_buf[2][input_row];
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input_row++;
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outptr = *output_buf++;
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if (PACK_NEED_ALIGNMENT(outptr)) {
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r = *inptr0++;
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g = *inptr1++;
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b = *inptr2++;
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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outptr += 2;
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num_cols--;
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}
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for (col = 0; col < (num_cols >> 1); col++) {
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r = *inptr0++;
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g = *inptr1++;
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b = *inptr2++;
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rgb = PACK_SHORT_565(r, g, b);
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r = *inptr0++;
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g = *inptr1++;
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b = *inptr2++;
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rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
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WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
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outptr += 4;
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}
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if (num_cols & 1) {
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r = *inptr0;
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g = *inptr1;
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b = *inptr2;
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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}
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}
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}
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INLINE
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LOCAL(void)
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rgb_rgb565D_convert_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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register JSAMPROW outptr;
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register JSAMPROW inptr0, inptr1, inptr2;
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register JDIMENSION col;
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register JSAMPLE *range_limit = cinfo->sample_range_limit;
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JDIMENSION num_cols = cinfo->output_width;
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JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK];
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SHIFT_TEMPS
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while (--num_rows >= 0) {
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JLONG rgb;
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unsigned int r, g, b;
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inptr0 = input_buf[0][input_row];
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inptr1 = input_buf[1][input_row];
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inptr2 = input_buf[2][input_row];
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input_row++;
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outptr = *output_buf++;
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if (PACK_NEED_ALIGNMENT(outptr)) {
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r = range_limit[DITHER_565_R(*inptr0++, d0)];
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g = range_limit[DITHER_565_G(*inptr1++, d0)];
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b = range_limit[DITHER_565_B(*inptr2++, d0)];
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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outptr += 2;
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num_cols--;
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}
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for (col = 0; col < (num_cols >> 1); col++) {
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r = range_limit[DITHER_565_R(*inptr0++, d0)];
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g = range_limit[DITHER_565_G(*inptr1++, d0)];
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b = range_limit[DITHER_565_B(*inptr2++, d0)];
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d0 = DITHER_ROTATE(d0);
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rgb = PACK_SHORT_565(r, g, b);
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r = range_limit[DITHER_565_R(*inptr0++, d0)];
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g = range_limit[DITHER_565_G(*inptr1++, d0)];
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b = range_limit[DITHER_565_B(*inptr2++, d0)];
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d0 = DITHER_ROTATE(d0);
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rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
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WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
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outptr += 4;
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}
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if (num_cols & 1) {
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r = range_limit[DITHER_565_R(*inptr0, d0)];
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g = range_limit[DITHER_565_G(*inptr1, d0)];
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b = range_limit[DITHER_565_B(*inptr2, d0)];
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rgb = PACK_SHORT_565(r, g, b);
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*(INT16 *)outptr = (INT16)rgb;
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}
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}
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}
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INLINE
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LOCAL(void)
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gray_rgb565_convert_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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register JSAMPROW inptr, outptr;
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register JDIMENSION col;
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JDIMENSION num_cols = cinfo->output_width;
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while (--num_rows >= 0) {
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JLONG rgb;
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unsigned int g;
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inptr = input_buf[0][input_row++];
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outptr = *output_buf++;
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if (PACK_NEED_ALIGNMENT(outptr)) {
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g = *inptr++;
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rgb = PACK_SHORT_565(g, g, g);
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*(INT16 *)outptr = (INT16)rgb;
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outptr += 2;
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num_cols--;
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}
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for (col = 0; col < (num_cols >> 1); col++) {
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g = *inptr++;
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rgb = PACK_SHORT_565(g, g, g);
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g = *inptr++;
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rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(g, g, g));
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WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
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outptr += 4;
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}
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if (num_cols & 1) {
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g = *inptr;
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rgb = PACK_SHORT_565(g, g, g);
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*(INT16 *)outptr = (INT16)rgb;
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}
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}
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}
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INLINE
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LOCAL(void)
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gray_rgb565D_convert_internal(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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register JSAMPROW inptr, outptr;
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register JDIMENSION col;
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register JSAMPLE *range_limit = cinfo->sample_range_limit;
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JDIMENSION num_cols = cinfo->output_width;
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JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK];
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while (--num_rows >= 0) {
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JLONG rgb;
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unsigned int g;
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inptr = input_buf[0][input_row++];
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outptr = *output_buf++;
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if (PACK_NEED_ALIGNMENT(outptr)) {
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g = *inptr++;
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g = range_limit[DITHER_565_R(g, d0)];
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rgb = PACK_SHORT_565(g, g, g);
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*(INT16 *)outptr = (INT16)rgb;
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outptr += 2;
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num_cols--;
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}
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for (col = 0; col < (num_cols >> 1); col++) {
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g = *inptr++;
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g = range_limit[DITHER_565_R(g, d0)];
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rgb = PACK_SHORT_565(g, g, g);
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d0 = DITHER_ROTATE(d0);
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g = *inptr++;
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g = range_limit[DITHER_565_R(g, d0)];
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rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(g, g, g));
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d0 = DITHER_ROTATE(d0);
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WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
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outptr += 4;
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}
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if (num_cols & 1) {
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g = *inptr;
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g = range_limit[DITHER_565_R(g, d0)];
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rgb = PACK_SHORT_565(g, g, g);
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*(INT16 *)outptr = (INT16)rgb;
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}
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}
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}
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