1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/* Copyright (C) 2001-2012 Artifex Software, Inc.
All Rights Reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
Refer to licensing information at http://www.artifex.com or contact
Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134, San Rafael,
CA 94903, U.S.A., +1(415)492-9861, for further information.
*/
/* ImageType 1 initialization */
#include "gx.h"
#include "gserrors.h"
#include "gxiparam.h"
#include "gximage.h"
#include "stream.h"
#include "memory_.h"
/* Structure descriptor */
public_st_gs_image1();
/*
* Define the image types for ImageType 1 images.
* Note that opaque images and masks have different types, although
* they have the same ImageType.
*/
static image_proc_sput(gx_image1_sput);
static image_proc_sget(gx_image1_sget);
static image_proc_release(gx_image1_release);
const gx_image_type_t gs_image_type_1 = {
&st_gs_image1, gx_begin_image1, gx_data_image_source_size,
gx_image1_sput, gx_image1_sget, gx_image1_release, 1
};
static image_proc_sput(gx_image1_mask_sput);
static image_proc_sget(gx_image1_mask_sget);
/*
* Image masks are not actually pixel images, so they don't need to
* worry about releasing the color space.
*/
const gx_image_type_t gs_image_type_mask1 = {
&st_gs_image1, gx_begin_image1, gx_data_image_source_size,
gx_image1_mask_sput, gx_image1_mask_sget, gx_image_default_release, 1
};
/* Define the procedures for initializing gs_image_ts to default values. */
void
gs_image_t_init_adjust(gs_image_t * pim, gs_color_space * color_space,
bool adjust)
{
gs_pixel_image_t_init((gs_pixel_image_t *) pim, color_space);
pim->ImageMask = (color_space == NULL);
pim->adjust = adjust;
pim->type = (pim->ImageMask ? &gs_image_type_mask1 : &gs_image_type_1);
pim->Alpha = gs_image_alpha_none;
pim->image_parent_type = gs_image_type1;
}
void
gs_image_t_init_mask_adjust(gs_image_t * pim, bool write_1s, bool adjust)
{
gs_image_t_init(pim, NULL);
if (write_1s)
pim->Decode[0] = 1, pim->Decode[1] = 0;
else
pim->Decode[0] = 0, pim->Decode[1] = 1;
pim->adjust = adjust;
}
/* Start processing an ImageType 1 image. */
int
gx_begin_image1(gx_device * dev,
const gs_imager_state * pis, const gs_matrix * pmat,
const gs_image_common_t * pic, const gs_int_rect * prect,
const gx_drawing_color * pdcolor, const gx_clip_path * pcpath,
gs_memory_t * mem, gx_image_enum_common_t ** pinfo)
{
gx_image_enum *penum;
const gs_image_t *pim = (const gs_image_t *)pic;
int code = gx_image_enum_alloc(pic, prect, mem, &penum);
if (code < 0)
return code;
penum->alpha = pim->Alpha;
penum->use_mask_color = false;
penum->image_parent_type = pim->image_parent_type;
penum->masked = pim->ImageMask;
penum->adjust =
(pim->ImageMask && pim->adjust ? float2fixed(0.25) : fixed_0);
code = gx_image_enum_begin(dev, pis, pmat, pic, pdcolor, pcpath, mem,
penum);
if (code >= 0)
*pinfo = (gx_image_enum_common_t *)penum;
return code;
}
/* Serialization */
/*
* We add the Alpha value to the control word.
*/
static int
gx_image1_sput(const gs_image_common_t *pic, stream *s,
const gs_color_space **ppcs)
{
const gs_image_t *const pim = (const gs_image_t *)pic;
return gx_pixel_image_sput((const gs_pixel_image_t *)pic, s, ppcs,
(int)pim->Alpha);
}
static int
gx_image1_sget(gs_image_common_t *pic, stream *s,
gs_color_space *pcs)
{
gs_image1_t *const pim = (gs_image1_t *)pic;
int code = gx_pixel_image_sget((gs_pixel_image_t *)pim, s, pcs);
if (code < 0)
return code;
pim->type = &gs_image_type_1;
pim->ImageMask = false;
pim->Alpha = code;
pim->image_parent_type = gs_image_type1;
return 0;
}
/*
* Masks have different parameters, so we use a different encoding:
* FFFFEEDCBA
* A = 0 if standard ImageMatrix, 1 if explicit ImageMatrix
* B = 0 if Decode=[0 1], 1 if Decode=[1 0]
* C = Interpolate
* D = adjust
* EE = Alpha
* FFFF = BitsPerComponent - 1 (only needed for soft masks)
* Width, encoded as a variable-length uint
* Height, encoded like Width
* ImageMatrix (if A = 1), per gs_matrix_store/fetch
*/
#define MI_ImageMatrix 0x01
#define MI_Decode 0x02
#define MI_Interpolate 0x04
#define MI_adjust 0x08
#define MI_Alpha_SHIFT 4
#define MI_Alpha_MASK 0x3
#define MI_BPC_SHIFT 6
#define MI_BPC_MASK 0xf
#define MI_BITS 10
static int
gx_image1_mask_sput(const gs_image_common_t *pic, stream *s,
const gs_color_space **ignore_ppcs)
{
const gs_image_t *pim = (const gs_image_t *)pic;
uint control =
(gx_image_matrix_is_default((const gs_data_image_t *)pim) ? 0 :
MI_ImageMatrix) |
(pim->Decode[0] != 0 ? MI_Decode : 0) |
(pim->Interpolate ? MI_Interpolate : 0) |
(pim->adjust ? MI_adjust : 0) |
(pim->Alpha << MI_Alpha_SHIFT) |
((pim->BitsPerComponent - 1) << MI_BPC_SHIFT);
sput_variable_uint(s, control);
sput_variable_uint(s, (uint)pim->Width);
sput_variable_uint(s, (uint)pim->Height);
if (control & MI_ImageMatrix)
sput_matrix(s, &pim->ImageMatrix);
return 0;
}
static int
gx_image1_mask_sget(gs_image_common_t *pic, stream *s,
gs_color_space *ignore_pcs)
{
gs_image1_t *const pim = (gs_image1_t *)pic;
int code;
uint control;
if ((code = sget_variable_uint(s, &control)) < 0)
return code;
gs_image_t_init_mask(pim, (control & MI_Decode) != 0);
if ((code = sget_variable_uint(s, (uint *)&pim->Width)) < 0 ||
(code = sget_variable_uint(s, (uint *)&pim->Height)) < 0
)
return code;
if (control & MI_ImageMatrix) {
if ((code = sget_matrix(s, &pim->ImageMatrix)) < 0)
return code;
} else
gx_image_matrix_set_default((gs_data_image_t *)pim);
pim->Interpolate = (control & MI_Interpolate) != 0;
pim->adjust = (control & MI_adjust) != 0;
pim->Alpha = (control >> MI_Alpha_SHIFT) & MI_Alpha_MASK;
pim->BitsPerComponent = ((control >> MI_BPC_SHIFT) & MI_BPC_MASK) + 1;
return 0;
}
static void
gx_image1_release(gs_image_common_t *pic, gs_memory_t *mem)
{
gx_pixel_image_release((gs_pixel_image_t *)pic, mem);
}
/* Free the image enumerator. */
void
gx_image_free_enum(gx_image_enum_common_t **ppenum)
{
gx_image_enum_common_t * penum = *ppenum;
gs_memory_t *mem = penum->memory;
/* Bug 688845 comment #38 :
Adobe Illustrator creates a Postscript document,
in which an image data procedure executes 'save',
and the corresponding 'restore' appears after the image end.
It causes this procedure is called at a higher save level than
at which the enumerator was allocated, so that gs_free_object below
works idle. Nevertheless we can't leave pointers in the structure,
because they may point to blocks already released
by the client's subclass method for end_image.
Leaving them uncleaned caused a real crash in the garbager - see bug 688845.
So we clean the entire subclassed enumerator here,
rather this is a generic function for base class.
Note the cleaning is neccessaryfor Postscript only,
because other languaged don't implement save-restore.
*/
memset(penum, 0, gs_object_size(mem, penum));
gs_free_object(mem, penum, "gx_image_free_enum");
*ppenum = NULL;
}
|
