summaryrefslogtreecommitdiff
path: root/source/fitz/bbox-device.c
blob: 377787412e729131df3fcf90900ce13199c6dd2b (plain)
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
#include "mupdf/fitz.h"

#include <assert.h>

#define STACK_SIZE 96

typedef struct fz_bbox_device_s
{
	fz_device super;

	fz_rect *result;
	int top;
	fz_rect stack[STACK_SIZE];
	/* mask content and tiles are ignored */
	int ignore;
} fz_bbox_device;

static void
fz_bbox_add_rect(fz_context *ctx, fz_device *dev, const fz_rect *rect, int clip)
{
	fz_bbox_device *bdev = (fz_bbox_device*)dev;
	fz_rect r = *rect;

	if (0 < bdev->top && bdev->top <= STACK_SIZE)
	{
		fz_intersect_rect(&r, &bdev->stack[bdev->top-1]);
	}
	if (!clip && bdev->top <= STACK_SIZE && !bdev->ignore)
	{
		fz_union_rect(bdev->result, &r);
	}
	if (clip && ++bdev->top <= STACK_SIZE)
	{
		bdev->stack[bdev->top-1] = r;
	}
}

static void
fz_bbox_fill_path(fz_context *ctx, fz_device *dev, const fz_path *path, int even_odd, const fz_matrix *ctm,
	fz_colorspace *colorspace, const float *color, float alpha, const fz_color_params *color_params)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, NULL, ctm, &r), 0);
}

static void
fz_bbox_stroke_path(fz_context *ctx, fz_device *dev, const fz_path *path, const fz_stroke_state *stroke,
	const fz_matrix *ctm, fz_colorspace *colorspace, const float *color, float alpha, const fz_color_params *color_params)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, stroke, ctm, &r), 0);
}

static void
fz_bbox_fill_text(fz_context *ctx, fz_device *dev, const fz_text *text, const fz_matrix *ctm,
	fz_colorspace *colorspace, const float *color, float alpha, const fz_color_params *color_params)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, NULL, ctm, &r), 0);
}

static void
fz_bbox_stroke_text(fz_context *ctx, fz_device *dev, const fz_text *text, const fz_stroke_state *stroke,
	const fz_matrix *ctm, fz_colorspace *colorspace, const float *color, float alpha, const fz_color_params *color_params)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, stroke, ctm, &r), 0);
}

static void
fz_bbox_fill_shade(fz_context *ctx, fz_device *dev, fz_shade *shade, const fz_matrix *ctm, float alpha, const fz_color_params *color_params)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_shade(ctx, shade, ctm, &r), 0);
}

static void
fz_bbox_fill_image(fz_context *ctx, fz_device *dev, fz_image *image, const fz_matrix *ctm, float alpha, const fz_color_params *color_params)
{
	fz_rect r = fz_unit_rect;
	fz_bbox_add_rect(ctx, dev, fz_transform_rect(&r, ctm), 0);
}

static void
fz_bbox_fill_image_mask(fz_context *ctx, fz_device *dev, fz_image *image, const fz_matrix *ctm,
	fz_colorspace *colorspace, const float *color, float alpha, const fz_color_params *color_params)
{
	fz_rect r = fz_unit_rect;
	fz_bbox_add_rect(ctx, dev, fz_transform_rect(&r, ctm), 0);
}

static void
fz_bbox_clip_path(fz_context *ctx, fz_device *dev, const fz_path *path, int even_odd, const fz_matrix *ctm, const fz_rect *scissor)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, NULL, ctm, &r), 1);
}

static void
fz_bbox_clip_stroke_path(fz_context *ctx, fz_device *dev, const fz_path *path, const fz_stroke_state *stroke, const fz_matrix *ctm, const fz_rect *scissor)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, stroke, ctm, &r), 1);
}

static void
fz_bbox_clip_text(fz_context *ctx, fz_device *dev, const fz_text *text, const fz_matrix *ctm, const fz_rect *scissor)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, NULL, ctm, &r), 1);
}

static void
fz_bbox_clip_stroke_text(fz_context *ctx, fz_device *dev, const fz_text *text, const fz_stroke_state *stroke, const fz_matrix *ctm, const fz_rect *scissor)
{
	fz_rect r;
	fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, stroke, ctm, &r), 1);
}

static void
fz_bbox_clip_image_mask(fz_context *ctx, fz_device *dev, fz_image *image, const fz_matrix *ctm, const fz_rect *scissor)
{
	fz_rect r = fz_unit_rect;
	fz_bbox_add_rect(ctx, dev, fz_transform_rect(&r, ctm), 1);
}

static void
fz_bbox_pop_clip(fz_context *ctx, fz_device *dev)
{
	fz_bbox_device *bdev = (fz_bbox_device*)dev;
	if (bdev->top > 0)
		bdev->top--;
	else
		fz_warn(ctx, "unexpected pop clip");
}

static void
fz_bbox_begin_mask(fz_context *ctx, fz_device *dev, const fz_rect *rect, int luminosity, fz_colorspace *colorspace, const float *color, const fz_color_params *color_params)
{
	fz_bbox_device *bdev = (fz_bbox_device*)dev;
	fz_bbox_add_rect(ctx, dev, rect, 1);
	bdev->ignore++;
}

static void
fz_bbox_end_mask(fz_context *ctx, fz_device *dev)
{
	fz_bbox_device *bdev = (fz_bbox_device*)dev;
	assert(bdev->ignore > 0);
	bdev->ignore--;
}

static void
fz_bbox_begin_group(fz_context *ctx, fz_device *dev, const fz_rect *rect, fz_colorspace *cs, int isolated, int knockout, int blendmode, float alpha)
{
	fz_bbox_add_rect(ctx, dev, rect, 1);
}

static void
fz_bbox_end_group(fz_context *ctx, fz_device *dev)
{
	fz_bbox_pop_clip(ctx, dev);
}

static int
fz_bbox_begin_tile(fz_context *ctx, fz_device *dev, const fz_rect *area, const fz_rect *view, float xstep, float ystep, const fz_matrix *ctm, int id)
{
	fz_bbox_device *bdev = (fz_bbox_device*)dev;
	fz_rect r = *area;
	fz_bbox_add_rect(ctx, dev, fz_transform_rect(&r, ctm), 0);
	bdev->ignore++;
	return 0;
}

static void
fz_bbox_end_tile(fz_context *ctx, fz_device *dev)
{
	fz_bbox_device *bdev = (fz_bbox_device*)dev;
	assert(bdev->ignore > 0);
	bdev->ignore--;
}

static void
fz_bbox_drop_device(fz_context *ctx, fz_device *dev)
{
	fz_bbox_device *bdev = (fz_bbox_device*)dev;
	if (bdev->top > 0)
		fz_warn(ctx, "items left on stack in bbox device: %d", bdev->top);
}

fz_device *
fz_new_bbox_device(fz_context *ctx, fz_rect *result)
{
	fz_bbox_device *dev = fz_new_derived_device(ctx, fz_bbox_device);

	dev->super.drop_device = fz_bbox_drop_device;

	dev->super.fill_path = fz_bbox_fill_path;
	dev->super.stroke_path = fz_bbox_stroke_path;
	dev->super.clip_path = fz_bbox_clip_path;
	dev->super.clip_stroke_path = fz_bbox_clip_stroke_path;

	dev->super.fill_text = fz_bbox_fill_text;
	dev->super.stroke_text = fz_bbox_stroke_text;
	dev->super.clip_text = fz_bbox_clip_text;
	dev->super.clip_stroke_text = fz_bbox_clip_stroke_text;

	dev->super.fill_shade = fz_bbox_fill_shade;
	dev->super.fill_image = fz_bbox_fill_image;
	dev->super.fill_image_mask = fz_bbox_fill_image_mask;
	dev->super.clip_image_mask = fz_bbox_clip_image_mask;

	dev->super.pop_clip = fz_bbox_pop_clip;

	dev->super.begin_mask = fz_bbox_begin_mask;
	dev->super.end_mask = fz_bbox_end_mask;
	dev->super.begin_group = fz_bbox_begin_group;
	dev->super.end_group = fz_bbox_end_group;

	dev->super.begin_tile = fz_bbox_begin_tile;
	dev->super.end_tile = fz_bbox_end_tile;

	dev->result = result;
	dev->top = 0;
	dev->ignore = 0;

	*result = fz_empty_rect;

	return (fz_device*)dev;
}