1/*
2
3Mask Cache Item.
4
5Copyright (c) 2003 OpenBeOS.
6
7Author:
8	Michael Pfeiffer
9
10Permission is hereby granted, free of charge, to any person obtaining a copy of
11this software and associated documentation files (the "Software"), to deal in
12the Software without restriction, including without limitation the rights to
13use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
14of the Software, and to permit persons to whom the Software is furnished to do
15so, subject to the following conditions:
16
17The above copyright notice and this permission notice shall be included in all
18copies or substantial portions of the Software.
19
20THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26THE SOFTWARE.
27
28*/
29
30#include <unistd.h>
31#include <sys/stat.h>
32#include <File.h>
33
34#include "Report.h"
35#include "Mask.h"
36#include "ImageCache.h"
37
38// Implementation of MaskDescription
39
40MaskDescription::MaskDescription(PDF* pdf, const char* mask, int length, int width, int height, int bpc)
41	: fPDF(pdf)
42	, fMask(mask)
43	, fLength(length)
44	, fWidth(width)
45	, fHeight(height)
46	, fBPC(bpc)
47{
48}
49
50CacheItem* MaskDescription::NewItem(int id) {
51	REPORT(kDebug, -1, "MaskDescription::NewItem called");
52	int imageID;
53	BString fileName(kMaskPathPrefix);
54	const char* name;
55	::Mask* mask = NULL;
56
57	fileName << id;
58	name = fileName.String();
59
60	if (!StoreMask(name)) {
61		REPORT(kError, -1, "Could not store mask in cache.");
62		return NULL;
63	}
64
65	imageID = MakePDFMask();
66
67	if (imageID == -1) {
68		REPORT(kError, -1, "Could not embed mask in PDF file.");
69		unlink(name);
70	} else {
71		mask = new ::Mask(fPDF, imageID, name, Length(), Width(), Height(), BPC());
72	}
73	return mask;
74}
75
76bool MaskDescription::StoreMask(const char* name) {
77	bool ok;
78	BFile file(name, B_WRITE_ONLY | B_CREATE_FILE | B_ERASE_FILE);
79	if (file.InitCheck() != B_OK) return false;
80	ok = file.Write(Mask(), Length()) == Length();
81	if (!ok) {
82		unlink(name);
83	} else {
84	}
85	return ok;
86}
87
88int MaskDescription::MakePDFMask() {
89//	*maskId = PDF_open_image(fPdf, "raw", "memory", (const char *) mask, length, width, height, 1, bpc, "mask");
90	BString options;
91	int maskID;
92	PDF_create_pvf(fPDF, "mask", 0, Mask(), Length(), NULL);
93	options << "width " << fWidth << " height " << fHeight << " components 1 bpc " << fBPC;
94	maskID = PDF_load_image(fPDF, "raw", "mask", 0, options.String());
95	PDF_delete_pvf(fPDF, "mask", 0);
96	return maskID;
97}
98
99// Implementation of Mask
100
101Mask::Mask(PDF* pdf, int imageID, const char* fileName, int length, int width, int height, int bpc)
102	: fPDF(pdf)
103	, fImageID(imageID)
104	, fFileName(fileName)
105	, fLength(length)
106	, fWidth(width)
107	, fHeight(height)
108	, fBPC(bpc)
109{
110}
111
112Mask::~Mask() {
113	PDF_close_image(fPDF, ImageID());
114	unlink(FileName());
115}
116
117bool Mask::Equals(CIDescription* description) const {
118	REPORT(kDebug, -1, "Mask::Equals called");
119	MaskDescription* desc = dynamic_cast<MaskDescription*>(description);
120	if (desc && Length() == desc->Length() && Width() == desc->Width() && Height() == desc->Height() && BPC() == desc->BPC()) {
121		off_t size;
122		BFile file(FileName(), B_READ_ONLY);
123		if (file.InitCheck() == B_OK && file.GetSize(&size) == B_OK && size == Length()) {
124			char* buffer = new char[Length()];
125			if (buffer == NULL) return false;
126			bool ok = file.Read(buffer, Length()) == Length() &&
127				memcmp(desc->Mask(), buffer, Length()) == 0;
128			delete[] buffer;
129			return ok;
130		}
131	}
132	return false;
133}
134