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- /* Copyright (C) 1994, 1995, 1996, 1997 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* gdevm24.c */
- /* 24-bit-per-pixel "memory" (stored bitmap) device */
- #include "memory_.h"
- #include "gx.h"
- #include "gxdevice.h"
- #include "gxdevmem.h" /* semi-public definitions */
- #include "gdevmem.h" /* private definitions */
-
- extern dev_proc_strip_copy_rop(mem_gray8_rgb24_strip_copy_rop); /* in gdevmrop.c */
- #define mem_true24_strip_copy_rop mem_gray8_rgb24_strip_copy_rop
-
- /* ================ Standard (byte-oriented) device ================ */
-
- #undef chunk
- #define chunk byte
-
- /* Procedures */
- declare_mem_procs(mem_true24_copy_mono, mem_true24_copy_color, mem_true24_fill_rectangle);
- private dev_proc_copy_alpha(mem_true24_copy_alpha);
-
- /* The device descriptor. */
- const gx_device_memory far_data mem_true24_device =
- mem_full_alpha_device("image24", 24, 0, mem_open,
- gx_default_rgb_map_rgb_color, gx_default_rgb_map_color_rgb,
- mem_true24_copy_mono, mem_true24_copy_color, mem_true24_fill_rectangle,
- mem_get_bits, gx_default_map_cmyk_color, mem_true24_copy_alpha,
- gx_default_strip_tile_rectangle, mem_true24_strip_copy_rop);
-
- /* Convert x coordinate to byte offset in scan line. */
- #undef x_to_byte
- #define x_to_byte(x) ((x) * 3)
-
- /* Unpack a color into its bytes. */
- #define declare_unpack_color(r, g, b, color)\
- byte r = (byte)(color >> 16);\
- byte g = (byte)((uint)color >> 8);\
- byte b = (byte)color
- /* Put a 24-bit color into the bitmap. */
- #define put3(ptr, r, g, b)\
- (ptr)[0] = r, (ptr)[1] = g, (ptr)[2] = b
- /* Put 4 bytes of color into the bitmap. */
- #define putw(ptr, wxyz)\
- *(bits32 *)(ptr) = (wxyz)
- /* Load the 3-word 24-bit-color cache. */
- /* Free variables: [m]dev, rgbr, gbrg, brgb. */
- #if arch_is_big_endian
- # define set_color24_cache(crgb, r, g, b)\
- mdev->color24.rgbr = rgbr = ((bits32)(crgb) << 8) | (r),\
- mdev->color24.gbrg = gbrg = (rgbr << 8) | (g),\
- mdev->color24.brgb = brgb = (gbrg << 8) | (b),\
- mdev->color24.rgb = (crgb)
- #else
- # define set_color24_cache(crgb, r, g, b)\
- mdev->color24.rgbr = rgbr =\
- ((bits32)(r) << 24) | ((bits32)(b) << 16) |\
- ((bits16)(g) << 8) | (r),\
- mdev->color24.brgb = brgb = (rgbr << 8) | (b),\
- mdev->color24.gbrg = gbrg = (brgb << 8) | (g),\
- mdev->color24.rgb = (crgb)
- #endif
-
- /* Fill a rectangle with a color. */
- private int
- mem_true24_fill_rectangle(gx_device *dev,
- int x, int y, int w, int h, gx_color_index color)
- { declare_unpack_color(r, g, b, color);
- declare_scan_ptr(dest);
-
- /*
- * In order to avoid testing w > 0 and h > 0 twice, we defer
- * executing setup_rect, and use fit_fill_xywh instead of
- * fit_fill.
- */
- fit_fill_xywh(dev, x, y, w, h);
- if ( w >= 5 )
- { if ( h <= 0 )
- return 0;
- setup_rect(dest);
- if ( r == g && r == b)
- {
- #if 1
- /* We think we can do better than the library's memset.... */
- int bcntm7 = w * 3 - 7;
- register bits32 cword = color | (color << 24);
- while ( h-- > 0 )
- { register byte *pptr = dest;
- byte *limit = pptr + bcntm7;
- /* We want to store full words, but we have to */
- /* guarantee that they are word-aligned. */
- switch ( x & 3 )
- {
- case 3: *pptr++ = (byte)cword;
- case 2: *pptr++ = (byte)cword;
- case 1: *pptr++ = (byte)cword;
- case 0: ;
- }
- /* Even with w = 5, we always store at least */
- /* 3 full words, regardless of the starting x. */
- *(bits32 *)pptr =
- ((bits32 *)pptr)[1] =
- ((bits32 *)pptr)[2] = cword;
- pptr += 12;
- while ( pptr < limit )
- { *(bits32 *)pptr =
- ((bits32 *)pptr)[1] = cword;
- pptr += 8;
- }
- switch ( pptr - limit )
- {
- case 0: pptr[6] = (byte)cword;
- case 1: pptr[5] = (byte)cword;
- case 2: pptr[4] = (byte)cword;
- case 3: *(bits32 *)pptr = cword;
- break;
- case 4: pptr[2] = (byte)cword;
- case 5: pptr[1] = (byte)cword;
- case 6: pptr[0] = (byte)cword;
- case 7: ;
- }
- inc_ptr(dest, draster);
- }
- #else
- int bcnt = w * 3;
- while ( h-- > 0 )
- { memset(dest, r, bcnt);
- inc_ptr(dest, draster);
- }
- #endif
- }
- else
- { int x3 = -x & 3, ww = w - x3; /* we know ww >= 2 */
- bits32 rgbr, gbrg, brgb;
- if ( mdev->color24.rgb == color )
- rgbr = mdev->color24.rgbr,
- gbrg = mdev->color24.gbrg,
- brgb = mdev->color24.brgb;
- else
- set_color24_cache(color, r, g, b);
- while ( h-- > 0 )
- { register byte *pptr = dest;
- int w1 = ww;
- switch ( x3 )
- {
- case 1:
- put3(pptr, r, g, b);
- pptr += 3; break;
- case 2:
- pptr[0] = r; pptr[1] = g;
- putw(pptr + 2, brgb);
- pptr += 6; break;
- case 3:
- pptr[0] = r;
- putw(pptr + 1, gbrg);
- putw(pptr + 5, brgb);
- pptr += 9; break;
- case 0:
- ;
- }
- while ( w1 >= 4 )
- { putw(pptr, rgbr);
- putw(pptr + 4, gbrg);
- putw(pptr + 8, brgb);
- pptr += 12;
- w1 -= 4;
- }
- switch ( w1 )
- {
- case 1:
- put3(pptr, r, g, b);
- break;
- case 2:
- putw(pptr, rgbr);
- pptr[4] = g; pptr[5] = b;
- break;
- case 3:
- putw(pptr, rgbr);
- putw(pptr + 4, gbrg);
- pptr[8] = b;
- break;
- case 0:
- ;
- }
- inc_ptr(dest, draster);
- }
- }
- }
- else if ( h > 0 ) /* w < 5 */
- {
- setup_rect(dest);
- switch ( w )
- {
- case 4:
- do
- { dest[9] = dest[6] = dest[3] = dest[0] = r;
- dest[10] = dest[7] = dest[4] = dest[1] = g;
- dest[11] = dest[8] = dest[5] = dest[2] = b;
- inc_ptr(dest, draster);
- }
- while ( --h );
- break;
- case 3:
- do
- { dest[6] = dest[3] = dest[0] = r;
- dest[7] = dest[4] = dest[1] = g;
- dest[8] = dest[5] = dest[2] = b;
- inc_ptr(dest, draster);
- }
- while ( --h );
- break;
- case 2:
- do
- { dest[3] = dest[0] = r;
- dest[4] = dest[1] = g;
- dest[5] = dest[2] = b;
- inc_ptr(dest, draster);
- }
- while ( --h );
- break;
- case 1:
- do
- { dest[0] = r, dest[1] = g, dest[2] = b;
- inc_ptr(dest, draster);
- }
- while ( --h );
- break;
- case 0:
- default:
- ;
- }
- }
- return 0;
- }
-
- /* Copy a monochrome bitmap. */
- private int
- mem_true24_copy_mono(gx_device *dev,
- const byte *base, int sourcex, int sraster, gx_bitmap_id id,
- int x, int y, int w, int h, gx_color_index zero, gx_color_index one)
- { const byte *line;
- int sbit;
- int first_bit;
- declare_scan_ptr(dest);
-
- fit_copy(dev, base, sourcex, sraster, id, x, y, w, h);
- setup_rect(dest);
- line = base + (sourcex >> 3);
- sbit = sourcex & 7;
- first_bit = 0x80 >> sbit;
- if ( zero != gx_no_color_index )
- { /* Loop for halftones or inverted masks */
- /* (never used). */
- declare_unpack_color(r0, g0, b0, zero);
- declare_unpack_color(r1, g1, b1, one);
- while ( h-- > 0 )
- { register byte *pptr = dest;
- const byte *sptr = line;
- register int sbyte = *sptr++;
- register int bit = first_bit;
- int count = w;
- do
- { if ( sbyte & bit )
- { if ( one != gx_no_color_index )
- put3(pptr, r1, g1, b1);
- }
- else
- put3(pptr, r0, g0, b0);
- pptr += 3;
- if ( (bit >>= 1) == 0 )
- bit = 0x80, sbyte = *sptr++;
- }
- while ( --count > 0 );
- line += sraster;
- inc_ptr(dest, draster);
- }
- }
- else if ( one != gx_no_color_index )
- { /* Loop for character and pattern masks. */
- /* This is used heavily. */
- declare_unpack_color(r1, g1, b1, one);
- int first_mask = first_bit << 1;
- int first_count, first_skip;
- if ( sbit + w > 8 )
- first_mask -= 1,
- first_count = 8 - sbit;
- else
- first_mask -= first_mask >> w,
- first_count = w;
- first_skip = first_count * 3;
- while ( h-- > 0 )
- { register byte *pptr = dest;
- const byte *sptr = line;
- register int sbyte = *sptr++ & first_mask;
- int count = w - first_count;
- if ( sbyte )
- { register int bit = first_bit;
- do
- { if ( sbyte & bit )
- put3(pptr, r1, g1, b1);
- pptr += 3;
- }
- while ( (bit >>= 1) & first_mask );
- }
- else
- pptr += first_skip;
- while ( count >= 8 )
- { sbyte = *sptr++;
- if ( sbyte & 0xf0 )
- { if ( sbyte & 0x80 )
- put3(pptr, r1, g1, b1);
- if ( sbyte & 0x40 )
- put3(pptr + 3, r1, g1, b1);
- if ( sbyte & 0x20 )
- put3(pptr + 6, r1, g1, b1);
- if ( sbyte & 0x10 )
- put3(pptr + 9, r1, g1, b1);
- }
- if ( sbyte & 0xf )
- { if ( sbyte & 8 )
- put3(pptr + 12, r1, g1, b1);
- if ( sbyte & 4 )
- put3(pptr + 15, r1, g1, b1);
- if ( sbyte & 2 )
- put3(pptr + 18, r1, g1, b1);
- if ( sbyte & 1 )
- put3(pptr + 21, r1, g1, b1);
- }
- pptr += 24;
- count -= 8;
- }
- if ( count > 0 )
- { register int bit = 0x80;
- sbyte = *sptr++;
- do
- { if ( sbyte & bit )
- put3(pptr, r1, g1, b1);
- pptr += 3;
- bit >>= 1;
- }
- while ( --count > 0 );
- }
- line += sraster;
- inc_ptr(dest, draster);
- }
- }
- return 0;
- }
-
- /* Copy a color bitmap. */
- private int
- mem_true24_copy_color(gx_device *dev,
- const byte *base, int sourcex, int sraster, gx_bitmap_id id,
- int x, int y, int w, int h)
- { fit_copy(dev, base, sourcex, sraster, id, x, y, w, h);
- mem_copy_byte_rect(mdev, base, sourcex, sraster, x, y, w, h);
- return 0;
- }
-
- /* Copy an alpha map. */
- private int
- mem_true24_copy_alpha(gx_device *dev, const byte *base, int sourcex,
- int sraster, gx_bitmap_id id, int x, int y, int w, int h,
- gx_color_index color, int depth)
- { const byte *line;
- declare_scan_ptr(dest);
- declare_unpack_color(r, g, b, color);
-
- fit_copy(dev, base, sourcex, sraster, id, x, y, w, h);
- setup_rect(dest);
- line = base;
- while ( h-- > 0 )
- { register byte *pptr = dest;
- int sx;
-
- for ( sx = sourcex; sx < sourcex + w; ++sx, pptr += 3 )
- { int alpha2, alpha;
-
- if ( depth == 2 ) /* map 0 - 3 to 0 - 15 */
- alpha =
- ((line[sx >> 2] >> ((3 - (sx & 3)) << 1)) & 3) * 5;
- else
- alpha2 = line[sx >> 1],
- alpha = (sx & 1 ? alpha2 & 0xf : alpha2 >> 4);
- if ( alpha == 15 )
- { /* Just write the new color. */
- put3(pptr, r, g, b);
- }
- else if ( alpha != 0 )
- { /* Blend RGB values. */
- #define make_shade(old, clr, alpha, amax) \
- (old) + (((int)(clr) - (int)(old)) * (alpha) / (amax))
- pptr[0] = make_shade(pptr[0], r, alpha, 15);
- pptr[1] = make_shade(pptr[1], g, alpha, 15);
- pptr[2] = make_shade(pptr[2], b, alpha, 15);
- #undef make_shade
- }
- }
- line += sraster;
- inc_ptr(dest, draster);
- }
- return 0;
- }
-
- /* ================ "Word"-oriented device ================ */
-
- /* Note that on a big-endian machine, this is the same as the */
- /* standard byte-oriented-device. */
-
- #if !arch_is_big_endian
-
- /* Procedures */
- declare_mem_procs(mem24_word_copy_mono, mem24_word_copy_color, mem24_word_fill_rectangle);
-
- /* Here is the device descriptor. */
- const gx_device_memory far_data mem_true24_word_device =
- mem_full_device("image24w", 24, 0, mem_open,
- gx_default_rgb_map_rgb_color, gx_default_rgb_map_color_rgb,
- mem24_word_copy_mono, mem24_word_copy_color, mem24_word_fill_rectangle,
- mem_word_get_bits, gx_default_map_cmyk_color,
- gx_default_strip_tile_rectangle, gx_no_strip_copy_rop);
-
- /* Fill a rectangle with a color. */
- private int
- mem24_word_fill_rectangle(gx_device *dev, int x, int y, int w, int h,
- gx_color_index color)
- { byte *base;
- uint raster;
- fit_fill(dev, x, y, w, h);
- base = scan_line_base(mdev, y);
- raster = mdev->raster;
- mem_swap_byte_rect(base, raster, x * 24, w * 24, h, true);
- mem_true24_fill_rectangle(dev, x, y, w, h, color);
- mem_swap_byte_rect(base, raster, x * 24, w * 24, h, false);
- return 0;
- }
-
- /* Copy a bitmap. */
- private int
- mem24_word_copy_mono(gx_device *dev,
- const byte *base, int sourcex, int sraster, gx_bitmap_id id,
- int x, int y, int w, int h, gx_color_index zero, gx_color_index one)
- { byte *row;
- uint raster;
- bool store;
- fit_copy(dev, base, sourcex, sraster, id, x, y, w, h);
- row = scan_line_base(mdev, y);
- raster = mdev->raster;
- store = (zero != gx_no_color_index && one != gx_no_color_index);
- mem_swap_byte_rect(row, raster, x * 24, w * 24, h, store);
- mem_true24_copy_mono(dev, base, sourcex, sraster, id,
- x, y, w, h, zero, one);
- mem_swap_byte_rect(row, raster, x * 24, w * 24, h, false);
- return 0;
- }
-
- /* Copy a color bitmap. */
- private int
- mem24_word_copy_color(gx_device *dev,
- const byte *base, int sourcex, int sraster, gx_bitmap_id id,
- int x, int y, int w, int h)
- { byte *row;
- uint raster;
- fit_copy(dev, base, sourcex, sraster, id, x, y, w, h);
- row = scan_line_base(mdev, y);
- raster = mdev->raster;
- mem_swap_byte_rect(row, raster, x * 24, w * 24, h, true);
- bytes_copy_rectangle(row + x * 3, raster, base + sourcex * 3, sraster,
- w * 3, h);
- mem_swap_byte_rect(row, raster, x * 24, w * 24, h, false);
- return 0;
- }
-
- #endif /* !arch_is_big_endian */
-