1 /*
2 * File: image.cc
3 *
4 * Copyright (C) 2005-2007 Jorge Arellano Cid <jcid@dillo.org>,
5 * Sebastian Geerken <sgeerken@dillo.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
11 */
12
13 /*
14 * This file implements image data transfer methods. It handles the transfer
15 * of data from an Image to a DwImage widget.
16 */
17
18 #include "msg.h"
19
20 #include "image.hh"
21 #include "dw/core.hh"
22 #include "dw/image.hh"
23
24 using namespace dw::core;
25
26 // Image to Object-ImgRenderer macro
27 #define I2IR(Image) ((dw::core::ImgRenderer*)(Image->img_rndr))
28
29
30 /*
31 * Create and initialize a new image structure.
32 */
a_Image_new(void * layout,void * img_rndr,int32_t bg_color)33 DilloImage *a_Image_new(void *layout, void *img_rndr, int32_t bg_color)
34 {
35 DilloImage *Image;
36
37 Image = dNew(DilloImage, 1);
38 Image->layout = layout;
39 Image->img_rndr = img_rndr;
40 Image->width = 0;
41 Image->height = 0;
42 Image->bg_color = bg_color;
43 Image->ScanNumber = 0;
44 Image->BitVec = NULL;
45 Image->State = IMG_Empty;
46
47 Image->RefCount = 0;
48
49 return Image;
50 }
51
52 /*
53 * Create and initialize a new image structure with an image widget.
54 */
a_Image_new_with_dw(void * layout,const char * alt_text,int32_t bg_color)55 DilloImage *a_Image_new_with_dw(void *layout, const char *alt_text,
56 int32_t bg_color)
57 {
58 dw::Image *dw = new dw::Image(alt_text);
59 return a_Image_new(layout, (void*)(dw::core::ImgRenderer*)dw, bg_color);
60 }
61
62 /*
63 * Return the image renderer as a widget. This is somewhat tricky,
64 * since simple casting leads to wrong (and hard to debug) results,
65 * because of multiple inheritance. This function can be used from C
66 * code, where only access to void* is possible.
67 */
a_Image_get_dw(DilloImage * Image)68 void *a_Image_get_dw(DilloImage *Image)
69 {
70 return (dw::Image*)(dw::core::ImgRenderer*)Image->img_rndr;
71 }
72 /*
73 * Deallocate an Image structure
74 */
Image_free(DilloImage * Image)75 static void Image_free(DilloImage *Image)
76 {
77 a_Bitvec_free(Image->BitVec);
78 dFree(Image);
79 }
80
81 /*
82 * Unref and free if necessary
83 * Do nothing if the argument is NULL
84 */
a_Image_unref(DilloImage * Image)85 void a_Image_unref(DilloImage *Image)
86 {
87 _MSG(" %d ", Image->RefCount);
88 if (Image && --Image->RefCount == 0)
89 Image_free(Image);
90 }
91
92 /*
93 * Add a reference to an Image struct
94 * Do nothing if the argument is NULL
95 */
a_Image_ref(DilloImage * Image)96 void a_Image_ref(DilloImage *Image)
97 {
98 if (Image)
99 ++Image->RefCount;
100 }
101
102 /*
103 * Set initial parameters of the image
104 */
a_Image_set_parms(DilloImage * Image,void * v_imgbuf,DilloUrl * url,int version,uint_t width,uint_t height,DilloImgType type)105 void a_Image_set_parms(DilloImage *Image, void *v_imgbuf, DilloUrl *url,
106 int version, uint_t width, uint_t height,
107 DilloImgType type)
108 {
109 _MSG("a_Image_set_parms: width=%d height=%d iw=%d ih=%d\n",
110 width, height, Image->width, Image->height);
111
112 /* Resize from 0,0 to width,height */
113 bool resize = true;
114 I2IR(Image)->setBuffer((Imgbuf*)v_imgbuf, resize);
115
116 if (!Image->BitVec)
117 Image->BitVec = a_Bitvec_new(height);
118 Image->width = width;
119 Image->height = height;
120 Image->State = IMG_SetParms;
121 }
122
123 /*
124 * Implement the write method
125 */
a_Image_write(DilloImage * Image,uint_t y)126 void a_Image_write(DilloImage *Image, uint_t y)
127 {
128 _MSG("a_Image_write\n");
129 dReturn_if_fail ( y < Image->height );
130
131 /* Update the row in DwImage */
132 I2IR(Image)->drawRow(y);
133 a_Bitvec_set_bit(Image->BitVec, y);
134 Image->State = IMG_Write;
135 }
136
137 /*
138 * Implement the close method
139 */
a_Image_close(DilloImage * Image)140 void a_Image_close(DilloImage *Image)
141 {
142 _MSG("a_Image_close\n");
143 I2IR(Image)->finish();
144 }
145
146 /*
147 * Implement the abort method
148 */
a_Image_abort(DilloImage * Image)149 void a_Image_abort(DilloImage *Image)
150 {
151 _MSG("a_Image_abort\n");
152 I2IR(Image)->fatal();
153 }
154
155