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/*
* Copyright 2018 Vincent Sanders <vince@netsurf-browser.org>
*
* This file is part of libnspdf.
*
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
*/
/**
* \file
* NetSurf PDF library graphics state
*/
#ifndef NSPDF__GRAPHICS_STATE_H_
#define NSPDF__GRAPHICS_STATE_H_
/**
* colourspaces
* \todo extend this with full list from section 4.5.2
*/
enum graphics_state_colorspace {
GSDeviceGray = 0, /* Default */
GSDeviceRGB,
GSDeviceCMYK,
};
struct graphics_state_color {
enum graphics_state_colorspace space;
union {
float gray; /* default is 0 - black */
struct {
float r;
float g;
float b;
} rgb;
struct {
float c;
float m;
float y;
float k;
} cmyk;
} u;
};
struct graphics_state_param {
float ctm[6]; /* current transform matrix */
/* clipping path */
struct {
struct graphics_state_color colour;
} stroke;
struct {
struct graphics_state_color colour;
} other;
/* text state */
float line_width;
unsigned int line_cap;
unsigned int line_join;
float miter_limit;
/* dash pattern */
/* rendering intent RelativeColorimetric */
bool stroke_adjustment;
/* blend mode: Normal */
/* soft mask */
/* alpha constant */
/* alpha source */
/* device dependant */
bool overprint;
float overprint_mode;
/* black generation */
/* undercolor removal */
/* transfer */
/* halftone */
float flatness;
float smoothness;
};
struct graphics_state {
float *path; /* current path */
unsigned int path_idx; /* current index into path */
unsigned int path_alloc; /* current number of path elements allocated */
struct graphics_state_param *param_stack; /* parameter stack */
unsigned int param_stack_idx;
unsigned int param_stack_alloc;
};
#endif
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