eBookReaderSwitch/include/mupdf/fitz/device.h

#ifndef MUPDF_FITZ_DEVICE_H
#define MUPDF_FITZ_DEVICE_H

#include "mupdf/fitz/system.h"
#include "mupdf/fitz/context.h"
#include "mupdf/fitz/geometry.h"
#include "mupdf/fitz/image.h"
#include "mupdf/fitz/shade.h"
#include "mupdf/fitz/path.h"
#include "mupdf/fitz/text.h"

/*
	The different format handlers (pdf, xps etc) interpret pages to a
	device. These devices can then process the stream of calls they
	receive in various ways:
		The trace device outputs debugging information for the calls.
		The draw device will render them.
		The list device stores them in a list to play back later.
		The text device performs text extraction and searching.
		The bbox device calculates the bounding box for the page.
	Other devices can (and will) be written in the future.
*/
typedef struct fz_device_s fz_device;

enum
{
	/* Flags */
	FZ_DEVFLAG_MASK = 1,
	FZ_DEVFLAG_COLOR = 2,
	FZ_DEVFLAG_UNCACHEABLE = 4,
	FZ_DEVFLAG_FILLCOLOR_UNDEFINED = 8,
	FZ_DEVFLAG_STROKECOLOR_UNDEFINED = 16,
	FZ_DEVFLAG_STARTCAP_UNDEFINED = 32,
	FZ_DEVFLAG_DASHCAP_UNDEFINED = 64,
	FZ_DEVFLAG_ENDCAP_UNDEFINED = 128,
	FZ_DEVFLAG_LINEJOIN_UNDEFINED = 256,
	FZ_DEVFLAG_MITERLIMIT_UNDEFINED = 512,
	FZ_DEVFLAG_LINEWIDTH_UNDEFINED = 1024,
	/* Arguably we should have a bit for the dash pattern itself being
	 * undefined, but that causes problems; do we assume that it should
	 * always be set to non-dashing at the start of every glyph? */
	FZ_DEVFLAG_BBOX_DEFINED = 2048,
	FZ_DEVFLAG_GRIDFIT_AS_TILED = 4096,
};

enum
{
	/* PDF 1.4 -- standard separable */
	FZ_BLEND_NORMAL,
	FZ_BLEND_MULTIPLY,
	FZ_BLEND_SCREEN,
	FZ_BLEND_OVERLAY,
	FZ_BLEND_DARKEN,
	FZ_BLEND_LIGHTEN,
	FZ_BLEND_COLOR_DODGE,
	FZ_BLEND_COLOR_BURN,
	FZ_BLEND_HARD_LIGHT,
	FZ_BLEND_SOFT_LIGHT,
	FZ_BLEND_DIFFERENCE,
	FZ_BLEND_EXCLUSION,

	/* PDF 1.4 -- standard non-separable */
	FZ_BLEND_HUE,
	FZ_BLEND_SATURATION,
	FZ_BLEND_COLOR,
	FZ_BLEND_LUMINOSITY,

	/* For packing purposes */
	FZ_BLEND_MODEMASK = 15,
	FZ_BLEND_ISOLATED = 16,
	FZ_BLEND_KNOCKOUT = 32
};

int fz_lookup_blendmode(const char *name);
char *fz_blendmode_name(int blendmode);

typedef struct fz_device_container_stack_s fz_device_container_stack;
struct fz_device_container_stack_s
{
	fz_rect scissor;
	int type;
	int user;
};

enum
{
	fz_device_container_stack_is_clip,
	fz_device_container_stack_is_mask,
	fz_device_container_stack_is_group,
	fz_device_container_stack_is_tile,
};

struct fz_device_s
{
	int refs;
	int hints;
	int flags;

	void (*close_device)(fz_context *, fz_device *);
	void (*drop_device)(fz_context *, fz_device *);

	void (*fill_path)(fz_context *, fz_device *, const fz_path *, int even_odd, fz_matrix, fz_colorspace *, const float *color, float alpha, fz_color_params );
	void (*stroke_path)(fz_context *, fz_device *, const fz_path *, const fz_stroke_state *, fz_matrix, fz_colorspace *, const float *color, float alpha, fz_color_params );
	void (*clip_path)(fz_context *, fz_device *, const fz_path *, int even_odd, fz_matrix, fz_rect scissor);
	void (*clip_stroke_path)(fz_context *, fz_device *, const fz_path *, const fz_stroke_state *, fz_matrix, fz_rect scissor);

	void (*fill_text)(fz_context *, fz_device *, const fz_text *, fz_matrix, fz_colorspace *, const float *color, float alpha, fz_color_params );
	void (*stroke_text)(fz_context *, fz_device *, const fz_text *, const fz_stroke_state *, fz_matrix, fz_colorspace *, const float *color, float alpha, fz_color_params );
	void (*clip_text)(fz_context *, fz_device *, const fz_text *, fz_matrix, fz_rect scissor);
	void (*clip_stroke_text)(fz_context *, fz_device *, const fz_text *, const fz_stroke_state *, fz_matrix, fz_rect scissor);
	void (*ignore_text)(fz_context *, fz_device *, const fz_text *, fz_matrix );

	void (*fill_shade)(fz_context *, fz_device *, fz_shade *shd, fz_matrix ctm, float alpha, fz_color_params color_params);
	void (*fill_image)(fz_context *, fz_device *, fz_image *img, fz_matrix ctm, float alpha, fz_color_params color_params);
	void (*fill_image_mask)(fz_context *, fz_device *, fz_image *img, fz_matrix ctm, fz_colorspace *, const float *color, float alpha, fz_color_params color_params);
	void (*clip_image_mask)(fz_context *, fz_device *, fz_image *img, fz_matrix ctm, fz_rect scissor);

	void (*pop_clip)(fz_context *, fz_device *);

	void (*begin_mask)(fz_context *, fz_device *, fz_rect area, int luminosity, fz_colorspace *, const float *bc, fz_color_params );
	void (*end_mask)(fz_context *, fz_device *);
	void (*begin_group)(fz_context *, fz_device *, fz_rect area, fz_colorspace *cs, int isolated, int knockout, int blendmode, float alpha);
	void (*end_group)(fz_context *, fz_device *);

	int (*begin_tile)(fz_context *, fz_device *, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm, int id);
	void (*end_tile)(fz_context *, fz_device *);

	void (*render_flags)(fz_context *, fz_device *, int set, int clear);
	void (*set_default_colorspaces)(fz_context *, fz_device *, fz_default_colorspaces *);

	void (*begin_layer)(fz_context *, fz_device *, const char *layer_name);
	void (*end_layer)(fz_context *, fz_device *);

	fz_rect d1_rect;

	int container_len;
	int container_cap;
	fz_device_container_stack *container;
};

void fz_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);
void fz_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);
void fz_clip_path(fz_context *ctx, fz_device *dev, const fz_path *path, int even_odd, fz_matrix ctm, fz_rect scissor);
void fz_clip_stroke_path(fz_context *ctx, fz_device *dev, const fz_path *path, const fz_stroke_state *stroke, fz_matrix ctm, fz_rect scissor);
void fz_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);
void fz_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);
void fz_clip_text(fz_context *ctx, fz_device *dev, const fz_text *text, fz_matrix ctm, fz_rect scissor);
void fz_clip_stroke_text(fz_context *ctx, fz_device *dev, const fz_text *text, const fz_stroke_state *stroke, fz_matrix ctm, fz_rect scissor);
void fz_ignore_text(fz_context *ctx, fz_device *dev, const fz_text *text, fz_matrix ctm);
void fz_pop_clip(fz_context *ctx, fz_device *dev);
void fz_fill_shade(fz_context *ctx, fz_device *dev, fz_shade *shade, fz_matrix ctm, float alpha, fz_color_params color_params);
void fz_fill_image(fz_context *ctx, fz_device *dev, fz_image *image, fz_matrix ctm, float alpha, fz_color_params color_params);
void fz_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);
void fz_clip_image_mask(fz_context *ctx, fz_device *dev, fz_image *image, fz_matrix ctm, fz_rect scissor);
void fz_begin_mask(fz_context *ctx, fz_device *dev, fz_rect area, int luminosity, fz_colorspace *colorspace, const float *bc, fz_color_params color_params);
void fz_end_mask(fz_context *ctx, fz_device *dev);
void fz_begin_group(fz_context *ctx, fz_device *dev, fz_rect area, fz_colorspace *cs, int isolated, int knockout, int blendmode, float alpha);
void fz_end_group(fz_context *ctx, fz_device *dev);
void fz_begin_tile(fz_context *ctx, fz_device *dev, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm);
int fz_begin_tile_id(fz_context *ctx, fz_device *dev, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm, int id);
void fz_end_tile(fz_context *ctx, fz_device *dev);
void fz_render_flags(fz_context *ctx, fz_device *dev, int set, int clear);
void fz_set_default_colorspaces(fz_context *ctx, fz_device *dev, fz_default_colorspaces *default_cs);
void fz_begin_layer(fz_context *ctx, fz_device *dev, const char *layer_name);
void fz_end_layer(fz_context *ctx, fz_device *dev);
fz_device *fz_new_device_of_size(fz_context *ctx, int size);

#define fz_new_derived_device(CTX, TYPE) \
	((TYPE *)Memento_label(fz_new_device_of_size(ctx,sizeof(TYPE)),#TYPE))

void fz_close_device(fz_context *ctx, fz_device *dev);

void fz_drop_device(fz_context *ctx, fz_device *dev);

fz_device *fz_keep_device(fz_context *ctx, fz_device *dev);

void fz_enable_device_hints(fz_context *ctx, fz_device *dev, int hints);
void fz_disable_device_hints(fz_context *ctx, fz_device *dev, int hints);

fz_rect fz_device_current_scissor(fz_context *ctx, fz_device *dev);

enum
{
	/* Hints */
	FZ_DONT_INTERPOLATE_IMAGES = 1,
	FZ_NO_CACHE = 2,
};

/*
	Cookie support - simple communication channel between app/library.
*/

typedef struct fz_cookie_s fz_cookie;

/*
	Provide two-way communication between application and library.
	Intended for multi-threaded applications where one thread is
	rendering pages and another thread wants to read progress
	feedback or abort a job that takes a long time to finish. The
	communication is unsynchronized without locking.

	abort: The application should set this field to 0 before
	calling fz_run_page to render a page. At any point when the
	page is being rendered the application my set this field to 1
	which will cause the rendering to finish soon. This field is
	checked periodically when the page is rendered, but exactly
	when is not known, therefore there is no upper bound on
	exactly when the rendering will abort. If the application
	did not provide a set of locks to fz_new_context, it must also
	await the completion of fz_run_page before issuing another
	call to fz_run_page. Note that once the application has set
	this field to 1 after it called fz_run_page it may not change
	the value again.

	progress: Communicates rendering progress back to the
	application and is read only. Increments as a page is being
	rendered. The value starts out at 0 and is limited to less
	than or equal to progress_max, unless progress_max is -1.

	progress_max: Communicates the known upper bound of rendering
	back to the application and is read only. The maximum value
	that the progress field may take. If there is no known upper
	bound on how long the rendering may take this value is -1 and
	progress is not limited. Note that the value of progress_max
	may change from -1 to a positive value once an upper bound is
	known, so take this into consideration when comparing the
	value of progress to that of progress_max.

	errors: count of errors during current rendering.

	incomplete: Initially should be set to 0. Will be set to non-zero
	if a TRYLATER error is thrown during rendering.
*/
struct fz_cookie_s
{
	int abort;
	int progress;
	int progress_max; /* -1 for unknown */
	int errors;
	int incomplete;
};

fz_device *fz_new_trace_device(fz_context *ctx, fz_output *out);

fz_device *fz_new_bbox_device(fz_context *ctx, fz_rect *rectp);

fz_device *fz_new_test_device(fz_context *ctx, int *is_color, float threshold, int options, fz_device *passthrough);

enum
{
	/* If set, test every pixel of images exhaustively.
	 * If clear, just look at colorspaces for images. */
	FZ_TEST_OPT_IMAGES = 1,

	/* If set, test every pixel of shadings. */
	/* If clear, just look at colorspaces for shadings. */
	FZ_TEST_OPT_SHADINGS = 2
};

fz_device *fz_new_draw_device(fz_context *ctx, fz_matrix transform, fz_pixmap *dest);

fz_device *fz_new_draw_device_with_bbox(fz_context *ctx, fz_matrix transform, fz_pixmap *dest, const fz_irect *clip);

fz_device *fz_new_draw_device_with_proof(fz_context *ctx, fz_matrix transform, fz_pixmap *dest, fz_colorspace *proof_cs);

fz_device *fz_new_draw_device_with_bbox_proof(fz_context *ctx, fz_matrix transform, fz_pixmap *dest, const fz_irect *clip, fz_colorspace *cs);

fz_device *fz_new_draw_device_type3(fz_context *ctx, fz_matrix transform, fz_pixmap *dest);

/*
	struct fz_draw_options: Options for creating a pixmap and draw device.
*/
typedef struct fz_draw_options_s fz_draw_options;

struct fz_draw_options_s
{
	int rotate;
	int x_resolution;
	int y_resolution;
	int width;
	int height;
	fz_colorspace *colorspace;
	int alpha;
	int graphics;
	int text;
};

extern const char *fz_draw_options_usage;

fz_draw_options *fz_parse_draw_options(fz_context *ctx, fz_draw_options *options, const char *string);

fz_device *fz_new_draw_device_with_options(fz_context *ctx, const fz_draw_options *options, fz_rect mediabox, fz_pixmap **pixmap);

#endif