home *** CD-ROM | disk | FTP | other *** search
- /* Copyright (C) 1994, 1995, 1996 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.
- */
-
- /* gdevm32.c */
- /* 32-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 */
-
- /* ================ Standard (byte-oriented) device ================ */
-
- #undef chunk
- #define chunk byte
-
- /* Procedures */
- declare_mem_procs(mem_true32_copy_mono, mem_true32_copy_color, mem_true32_fill_rectangle);
-
- /* The device descriptor. */
- const gx_device_memory far_data mem_true32_device =
- mem_full_device("image32", 24, 8, mem_open,
- gx_default_map_rgb_color, gx_default_map_color_rgb,
- mem_true32_copy_mono, mem_true32_copy_color, mem_true32_fill_rectangle,
- mem_get_bits, gx_default_cmyk_map_cmyk_color,
- gx_default_strip_tile_rectangle, gx_no_strip_copy_rop);
-
- /* Convert x coordinate to byte offset in scan line. */
- #undef x_to_byte
- #define x_to_byte(x) ((x) << 2)
-
- /* Swap the bytes of a color if needed. */
- #define color_swap_bytes(color)\
- (((color) >> 24) + (((color) >> 8) & 0xff00) +\
- (((color) & 0xff00) << 8) + ((color) << 24))
- #if arch_is_big_endian
- # define arrange_bytes(color) (color)
- #else
- # define arrange_bytes(color) color_swap_bytes(color)
- #endif
-
- /* Fill a rectangle with a color. */
- private int
- mem_true32_fill_rectangle(gx_device *dev,
- int x, int y, int w, int h, gx_color_index color)
- { bits32 a_color;
- declare_scan_ptr(dest);
-
- fit_fill(dev, x, y, w, h);
- a_color = arrange_bytes(color);
- setup_rect(dest);
- if ( w <= 4 )
- switch ( w )
- {
- /*case 0:*/ /* not possible */
- #define dest32 ((bits32 *)dest)
- case 1:
- do
- { dest32[0] = a_color;
- inc_ptr(dest, draster);
- }
- while ( --h > 0 );
- break;
- case 2:
- do
- { dest32[1] = dest32[0] = a_color;
- inc_ptr(dest, draster);
- }
- while ( --h > 0 );
- break;
- case 3:
- do
- { dest32[2] = dest32[1] = dest32[0] = a_color;
- inc_ptr(dest, draster);
- }
- while ( --h > 0 );
- break;
- case 4:
- do
- { dest32[3] = dest32[2] = dest32[1] = dest32[0] = a_color;
- inc_ptr(dest, draster);
- }
- while ( --h > 0 );
- break;
- default: /* not possible */
- ;
- }
- else if ( a_color == 0 )
- do
- { memset(dest, 0, w << 2);
- inc_ptr(dest, draster);
- }
- while ( --h > 0 );
- else
- do
- { bits32 *pptr = dest32;
- int cnt = w;
- do
- { pptr[3] = pptr[2] = pptr[1] = pptr[0] = a_color;
- pptr += 4;
- }
- while ( (cnt -= 4) > 4 );
- do { *pptr++ = a_color; } while ( --cnt > 0 );
- inc_ptr(dest, draster);
- }
- while ( --h > 0 );
- #undef dest32
- return 0;
- }
-
- /* Copy a monochrome bitmap. */
- private int
- mem_true32_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)
- { bits32 a_zero = arrange_bytes(zero);
- bits32 a_one = arrange_bytes(one);
- const byte *line;
- 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);
- first_bit = 0x80 >> (sourcex & 7);
- while ( h-- > 0 )
- { register bits32 *pptr = (bits32 *)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 )
- *pptr = a_one;
- }
- else
- { if ( zero != gx_no_color_index )
- *pptr = a_zero;
- }
- if ( (bit >>= 1) == 0 )
- bit = 0x80, sbyte = *sptr++;
- pptr++;
- }
- while ( --count > 0 );
- line += sraster;
- inc_ptr(dest, draster);
- }
- return 0;
- }
-
- /* Copy a color bitmap. */
- private int
- mem_true32_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;
- }
-
- /* ================ "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(mem32_word_copy_mono, mem32_word_copy_color, mem32_word_fill_rectangle);
-
- /* Here is the device descriptor. */
- const gx_device_memory far_data mem_true32_word_device =
- mem_full_device("image32w", 24, 8, mem_open,
- gx_default_map_rgb_color, gx_default_map_color_rgb,
- mem32_word_copy_mono, mem32_word_copy_color, mem32_word_fill_rectangle,
- mem_word_get_bits, gx_default_cmyk_map_cmyk_color,
- gx_default_strip_tile_rectangle, gx_no_strip_copy_rop);
-
- /* Fill a rectangle with a color. */
- private int
- mem32_word_fill_rectangle(gx_device *dev, int x, int y, int w, int h,
- gx_color_index color)
- { return mem_true32_fill_rectangle(dev, x, y, w, h,
- color_swap_bytes(color));
- }
-
- /* Copy a bitmap. */
- private int
- mem32_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)
- { return mem_true32_copy_mono(dev, base, sourcex, sraster, id,
- x, y, w, h, color_swap_bytes(zero),
- color_swap_bytes(one));
- }
-
- /* Copy a color bitmap. */
- private int
- mem32_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;
- bytes_copy_rectangle(row + (x << 2), raster, base + (sourcex << 2),
- sraster, w << 2, h);
- mem_swap_byte_rect(row, raster, x << 5, w << 5, h, false);
- return 0;
- }
-
- #endif /* !arch_is_big_endian */
-