hb-cairo-utils.hh (4364B)
1 /* 2 * Copyright © 2022 Red Hat, Inc 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Google Author(s): Matthias Clasen 25 */ 26 27 #ifndef HB_CAIRO_UTILS_H 28 #define HB_CAIRO_UTILS_H 29 30 #include "hb.hh" 31 #include "hb-cairo.h" 32 33 34 typedef struct 35 { 36 cairo_scaled_font_t *scaled_font; 37 cairo_t *cr; 38 hb_map_t *color_cache; 39 } hb_cairo_context_t; 40 41 static inline cairo_operator_t 42 _hb_paint_composite_mode_to_cairo (hb_paint_composite_mode_t mode) 43 { 44 switch (mode) 45 { 46 case HB_PAINT_COMPOSITE_MODE_CLEAR: return CAIRO_OPERATOR_CLEAR; 47 case HB_PAINT_COMPOSITE_MODE_SRC: return CAIRO_OPERATOR_SOURCE; 48 case HB_PAINT_COMPOSITE_MODE_DEST: return CAIRO_OPERATOR_DEST; 49 case HB_PAINT_COMPOSITE_MODE_SRC_OVER: return CAIRO_OPERATOR_OVER; 50 case HB_PAINT_COMPOSITE_MODE_DEST_OVER: return CAIRO_OPERATOR_DEST_OVER; 51 case HB_PAINT_COMPOSITE_MODE_SRC_IN: return CAIRO_OPERATOR_IN; 52 case HB_PAINT_COMPOSITE_MODE_DEST_IN: return CAIRO_OPERATOR_DEST_IN; 53 case HB_PAINT_COMPOSITE_MODE_SRC_OUT: return CAIRO_OPERATOR_OUT; 54 case HB_PAINT_COMPOSITE_MODE_DEST_OUT: return CAIRO_OPERATOR_DEST_OUT; 55 case HB_PAINT_COMPOSITE_MODE_SRC_ATOP: return CAIRO_OPERATOR_ATOP; 56 case HB_PAINT_COMPOSITE_MODE_DEST_ATOP: return CAIRO_OPERATOR_DEST_ATOP; 57 case HB_PAINT_COMPOSITE_MODE_XOR: return CAIRO_OPERATOR_XOR; 58 case HB_PAINT_COMPOSITE_MODE_PLUS: return CAIRO_OPERATOR_ADD; 59 case HB_PAINT_COMPOSITE_MODE_SCREEN: return CAIRO_OPERATOR_SCREEN; 60 case HB_PAINT_COMPOSITE_MODE_OVERLAY: return CAIRO_OPERATOR_OVERLAY; 61 case HB_PAINT_COMPOSITE_MODE_DARKEN: return CAIRO_OPERATOR_DARKEN; 62 case HB_PAINT_COMPOSITE_MODE_LIGHTEN: return CAIRO_OPERATOR_LIGHTEN; 63 case HB_PAINT_COMPOSITE_MODE_COLOR_DODGE: return CAIRO_OPERATOR_COLOR_DODGE; 64 case HB_PAINT_COMPOSITE_MODE_COLOR_BURN: return CAIRO_OPERATOR_COLOR_BURN; 65 case HB_PAINT_COMPOSITE_MODE_HARD_LIGHT: return CAIRO_OPERATOR_HARD_LIGHT; 66 case HB_PAINT_COMPOSITE_MODE_SOFT_LIGHT: return CAIRO_OPERATOR_SOFT_LIGHT; 67 case HB_PAINT_COMPOSITE_MODE_DIFFERENCE: return CAIRO_OPERATOR_DIFFERENCE; 68 case HB_PAINT_COMPOSITE_MODE_EXCLUSION: return CAIRO_OPERATOR_EXCLUSION; 69 case HB_PAINT_COMPOSITE_MODE_MULTIPLY: return CAIRO_OPERATOR_MULTIPLY; 70 case HB_PAINT_COMPOSITE_MODE_HSL_HUE: return CAIRO_OPERATOR_HSL_HUE; 71 case HB_PAINT_COMPOSITE_MODE_HSL_SATURATION: return CAIRO_OPERATOR_HSL_SATURATION; 72 case HB_PAINT_COMPOSITE_MODE_HSL_COLOR: return CAIRO_OPERATOR_HSL_COLOR; 73 case HB_PAINT_COMPOSITE_MODE_HSL_LUMINOSITY: return CAIRO_OPERATOR_HSL_LUMINOSITY; 74 default: return CAIRO_OPERATOR_CLEAR; 75 } 76 } 77 78 HB_INTERNAL hb_bool_t 79 _hb_cairo_paint_glyph_image (hb_cairo_context_t *c, 80 hb_blob_t *blob, 81 unsigned width, 82 unsigned height, 83 hb_tag_t format, 84 float slant, 85 hb_glyph_extents_t *extents); 86 87 HB_INTERNAL void 88 _hb_cairo_paint_linear_gradient (hb_cairo_context_t *c, 89 hb_color_line_t *color_line, 90 float x0, float y0, 91 float x1, float y1, 92 float x2, float y2); 93 94 HB_INTERNAL void 95 _hb_cairo_paint_radial_gradient (hb_cairo_context_t *c, 96 hb_color_line_t *color_line, 97 float x0, float y0, float r0, 98 float x1, float y1, float r1); 99 100 HB_INTERNAL void 101 _hb_cairo_paint_sweep_gradient (hb_cairo_context_t *c, 102 hb_color_line_t *color_line, 103 float x0, float y0, 104 float start_angle, float end_angle); 105 106 107 #endif /* HB_CAIRO_UTILS_H */