214 lines
6.1 KiB
C
214 lines
6.1 KiB
C
|
#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, fz_rect rect, int clip)
|
||
|
|
{
|
||
|
|
fz_bbox_device *bdev = (fz_bbox_device*)dev;
|
||
|
|
|
||
|
|
if (0 < bdev->top && bdev->top <= STACK_SIZE)
|
||
|
|
{
|
||
|
|
rect = fz_intersect_rect(rect, bdev->stack[bdev->top-1]);
|
||
|
|
}
|
||
|
|
if (!clip && bdev->top <= STACK_SIZE && !bdev->ignore)
|
||
|
|
{
|
||
|
|
*bdev->result = fz_union_rect(*bdev->result, rect);
|
||
|
|
}
|
||
|
|
if (clip && ++bdev->top <= STACK_SIZE)
|
||
|
|
{
|
||
|
|
bdev->stack[bdev->top-1] = rect;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_fill_path(fz_context *ctx, fz_device *dev, const fz_path *path, int even_odd, fz_matrix ctm,
|
||
|
|
fz_colorspace *colorspace, const float *color, float alpha, fz_color_params color_params)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, NULL, ctm), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_stroke_path(fz_context *ctx, fz_device *dev, const fz_path *path, const fz_stroke_state *stroke,
|
||
|
|
fz_matrix ctm, fz_colorspace *colorspace, const float *color, float alpha, fz_color_params color_params)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, stroke, ctm), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_fill_text(fz_context *ctx, fz_device *dev, const fz_text *text, fz_matrix ctm,
|
||
|
|
fz_colorspace *colorspace, const float *color, float alpha, fz_color_params color_params)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, NULL, ctm), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_stroke_text(fz_context *ctx, fz_device *dev, const fz_text *text, const fz_stroke_state *stroke,
|
||
|
|
fz_matrix ctm, fz_colorspace *colorspace, const float *color, float alpha, fz_color_params color_params)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, stroke, ctm), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_fill_shade(fz_context *ctx, fz_device *dev, fz_shade *shade, fz_matrix ctm, float alpha, fz_color_params color_params)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_shade(ctx, shade, ctm), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_fill_image(fz_context *ctx, fz_device *dev, fz_image *image, fz_matrix ctm, float alpha, fz_color_params color_params)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_transform_rect(fz_unit_rect, ctm), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_fill_image_mask(fz_context *ctx, fz_device *dev, fz_image *image, fz_matrix ctm,
|
||
|
|
fz_colorspace *colorspace, const float *color, float alpha, fz_color_params color_params)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_transform_rect(fz_unit_rect, ctm), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_clip_path(fz_context *ctx, fz_device *dev, const fz_path *path, int even_odd, fz_matrix ctm, fz_rect scissor)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, NULL, ctm), 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_clip_stroke_path(fz_context *ctx, fz_device *dev, const fz_path *path, const fz_stroke_state *stroke, fz_matrix ctm, fz_rect scissor)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_path(ctx, path, stroke, ctm), 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_clip_text(fz_context *ctx, fz_device *dev, const fz_text *text, fz_matrix ctm, fz_rect scissor)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, NULL, ctm), 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_clip_stroke_text(fz_context *ctx, fz_device *dev, const fz_text *text, const fz_stroke_state *stroke, fz_matrix ctm, fz_rect scissor)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_bound_text(ctx, text, stroke, ctm), 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
fz_bbox_clip_image_mask(fz_context *ctx, fz_device *dev, fz_image *image, fz_matrix ctm, fz_rect scissor)
|
||
|
|
{
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_transform_rect(fz_unit_rect, 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, fz_rect rect, int luminosity, fz_colorspace *colorspace, const float *color, 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, 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, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm, int id)
|
||
|
|
{
|
||
|
|
fz_bbox_device *bdev = (fz_bbox_device*)dev;
|
||
|
|
fz_bbox_add_rect(ctx, dev, fz_transform_rect(area, 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--;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Create a device to compute the bounding
|
||
|
|
box of all marks on a page.
|
||
|
|
|
||
|
|
The returned bounding box will be the union of all bounding
|
||
|
|
boxes of all objects on a page.
|
||
|
|
*/
|
||
|
|
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.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;
|
||
|
|
}
|