Mercurial > MadButterfly

annotate src/shape_image.c @ 268:43900cae1d49

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Support resizing for image. - Programmers can change size of image that showed on the output device.
author Thinker K.F. Li <thinker@branda.to>
date Sat, 24 Jan 2009 18:19:02 +0800
parents af2d3300f8ff
children 6a1b36738d3d
rev   line source
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
1 #include <stdio.h>
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
2 #include <string.h>
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
3 #include <cairo.h>
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
4 #include "mb_types.h"
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
5 #include "mb_shapes.h"
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
6 #include "mb_img_ldr.h"
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
7 #include "mb_tools.h"
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
8
265
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
9 /*! \page sh_image_n_image_ldr Image and Image Loader
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
10 *
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
11 * Image (\ref sh_image_t) is a shape to show an image on the output
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
12 * device. Programmers manipulate object of an image shape to show it
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
13 * at specified position with specified size. To create a new instance
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
14 * of sh_iamge_t, an image should be specified. Programmers must have
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
15 * a way to load image from files. The solution proposed by MadButterfly
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
16 * is image loader (\ref mb_img_ldr_t).
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
17 *
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
18 * Image loader is a repository of image files, programmers give him an
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
19 * ID and get an image returned the loader. Image loader decodes image
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
20 * files specified IDs and return them in an internal representation.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
21 * The internal representation of an array of pixels. Pixels are in
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
22 * order of columns (X-axis) and then row by row (Y-axis). An pixel
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
23 * can be 32bits, for ARGB, 24bits, for RGB, 8bits, for 8bits Alpha or
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
24 * 256-grey-levels, and 1bits, for bitmap.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
25 *
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
26 * Every row is padded to round to byte boundary, a rounded row is a stride.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
27 * Bytes a stride occupied is stride size. The internal rpresentation
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
28 * is a series of strides. The data returned by image loader is
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
29 * \ref mb_img_data_t type. mb_img_data_t::content is data in internal
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
30 * representation.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
31 *
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
32 * \ref simple_mb_img_ldr_t is a simple implementation of image loader.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
33 * It is a repository of image files in a directory and sub-directories.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
34 * ID of an image is mapped to a file in the directory and sub-directories.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
35 * ID it-self is a relative path relate to root directory of the repository.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
36 * \ref simple_mb_img_ldr_t handle PNG files only, now.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
37 *
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
38 * \section get_img_ldr Get an Image Loader for Program
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
39 * redraw_man_t::img_ldr is an image loader assigned by backend.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
40 * X backend, now, create an instance of simple_mb_img_ldr_t and assigns
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
41 * the instance to redraw_man_t::img_ldr. Programmers should get
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
42 * image loader assigned for a rdman by calling rdman_img_ldr().
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
43 *
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
44 * \image html image_n_ldr.png
266
af2d3300f8ff Add image for document of latex format
Thinker K.F. Li <thinker@branda.to>
parents: 265
diff changeset
45 * \image latex image_n_ldr.eps "Relationship of image and loader" width=10cm
265
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
46 */
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
47
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
48 #define ASSERT(x)
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
49 #define OK 0
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
50 #define ERR -1
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
51
265
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
52 /*! \brief Image shape.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
53 */
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
54 typedef struct _sh_image {
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
55 shape_t shape;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
56
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
57 co_aix x, y;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
58 co_aix w, h;
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
59 co_aix poses[4][2];
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
60
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
61 mb_img_data_t *img_data;
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
62 paint_t *paint;
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
63 redraw_man_t *rdman;
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
64 } sh_image_t;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
65
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
66 static void sh_image_free(shape_t *shape);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
67
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
68 /*! \brief Creae a new image shape.
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
69 *
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
70 * \param img_data is image data whose owner-ship is transfered.
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
71 */
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
72 shape_t *rdman_shape_image_new(redraw_man_t *rdman, mb_img_data_t *img_data,
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
73 co_aix x, co_aix y, co_aix w, co_aix h) {
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
74 sh_image_t *img;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
75 cairo_format_t fmt;
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
76 paint_t *paint;
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
77
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
78 img = O_ALLOC(sh_image_t);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
79 if(img == NULL)
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
80 return NULL;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
81
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
82 memset(img, 0, sizeof(sh_image_t));
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
83
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
84 img->shape.free = sh_image_free;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
85 mb_obj_init((mb_obj_t *)img, MBO_IMAGE);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
86 img->x = x;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
87 img->y = y;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
88 img->w = w;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
89 img->h = h;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
90 img->img_data = img_data;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
91
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
92 paint = rdman_paint_image_new(rdman, img_data);
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
93 rdman_paint_fill(rdman, paint, (shape_t *)img);
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
94 img->paint = paint;
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
95 img->rdman = rdman;
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
96
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
97 return (shape_t *)img;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
98 }
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
99
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
100 void sh_image_free(shape_t *shape) {
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
101 sh_image_t *img = (sh_image_t *)shape;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
102
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
103 rdman_paint_free(img->rdman, img->paint);
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
104 mb_obj_destroy(shape);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
105 MB_IMG_DATA_FREE(img->img_data);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
106 free(img);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
107 }
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
108
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
109 void sh_image_transform(shape_t *shape) {
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
110 sh_image_t *img = (sh_image_t *)shape;
268
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
111 mb_img_data_t *img_data;
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
112 co_aix (*poses)[2];
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
113 co_aix img_matrix[6];
268
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
114 co_aix x_factor, y_factor;
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
115 cairo_matrix_t cmatrix;
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
116 int i;
268
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
117
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
118 img_data = img->img_data;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
119
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
120 poses = img->poses;
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
121 poses[0][0] = img->x;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
122 poses[0][1] = img->y;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
123 poses[1][0] = img->x + img->w;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
124 poses[1][1] = img->y;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
125 poses[2][0] = img->x + img->w;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
126 poses[2][1] = img->y + img->h;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
127 poses[3][0] = img->x;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
128 poses[3][1] = img->y + img->h;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
129 for(i = 0; i < 4; i++)
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
130 coord_trans_pos(img->shape.coord, &poses[i][0], &poses[i][1]);
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
131
265
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
132 /* Transformation from user space to image space */
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
133 img_matrix[0] = (poses[1][0] - poses[0][0]) / img->w;
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
134 img_matrix[1] = (poses[1][1] - poses[0][1]) / img->w;
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
135 img_matrix[2] = -poses[0][0];
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
136 img_matrix[3] = (poses[3][0] - poses[0][0]) / img->h;
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
137 img_matrix[4] = (poses[3][1] - poses[0][1]) / img->h;
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
138 img_matrix[5] = -poses[0][1];
268
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
139 if(img->w != img_data->w ||
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
140 img->h != img_data->h) {
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
141 /* Resize image */
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
142 x_factor = img_data->w / img->w;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
143 img_matrix[0] *= x_factor;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
144 img_matrix[1] *= x_factor;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
145 img_matrix[2] *= x_factor;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
146 y_factor = img_data->h / img->h;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
147 img_matrix[3] *= y_factor;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
148 img_matrix[4] *= y_factor;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
149 img_matrix[5] *= y_factor;
43900cae1d49 Support resizing for image.
Thinker K.F. Li <thinker@branda.to>
parents: 266
diff changeset
150 }
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
151 paint_image_set_matrix(sh_get_fill(shape), img_matrix);
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
152
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
153 geo_from_positions(sh_get_geo(shape), 4, poses);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
154 }
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
155
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
156 /*! \brief Draw image for an image shape.
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
157 *
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
158 * \note Image is not rescaled for size of the shape.
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
159 */
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
160 void sh_image_draw(shape_t *shape, cairo_t *cr) {
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
161 sh_image_t *img = (sh_image_t *)shape;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
162 cairo_pattern_t *saved_source;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
163 cairo_matrix_t matrix, saved_matrix;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
164 co_aix *aggr;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
165
260
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
166 cairo_move_to(cr, img->poses[0][0], img->poses[0][1]);
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
167 cairo_line_to(cr, img->poses[1][0], img->poses[1][1]);
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
168 cairo_line_to(cr, img->poses[2][0], img->poses[2][1]);
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
169 cairo_line_to(cr, img->poses[3][0], img->poses[3][1]);
29acbd8a0dd0 Integrate sh_image with svg2code.py.
Thinker K.F. Li <thinker@branda.to>
parents: 257
diff changeset
170 cairo_close_path(cr);
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
171 }
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
172
265
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
173 /*! \brief Change geometry of an image.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
174 *
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
175 * Set position and size of an image.
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
176 */
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
177 void sh_image_set_geometry(shape_t *shape, co_aix x, co_aix y,
b42ee279669e Change function name and add comments.
Thinker K.F. Li <thinker@branda.to>
parents: 260
diff changeset
178 co_aix w, co_aix h) {
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
179 sh_image_t *img = (sh_image_t *)shape;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
180
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
181 img->x = x;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
182 img->y = y;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
183 img->w = w;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
184 img->h = h;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
185 }