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+/*
+ * Copyright © 2022 Red Hat, Inc
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Matthias Clasen
+ */
+
+#ifndef HB_CAIRO_UTILS_H
+#define HB_CAIRO_UTILS_H
+
+#include "hb.hh"
+#include "hb-cairo.h"
+
+
+typedef struct
+{
+ cairo_scaled_font_t *scaled_font;
+ cairo_t *cr;
+ hb_map_t *color_cache;
+} hb_cairo_context_t;
+
+static inline cairo_operator_t
+_hb_paint_composite_mode_to_cairo (hb_paint_composite_mode_t mode)
+{
+ switch (mode)
+ {
+ case HB_PAINT_COMPOSITE_MODE_CLEAR: return CAIRO_OPERATOR_CLEAR;
+ case HB_PAINT_COMPOSITE_MODE_SRC: return CAIRO_OPERATOR_SOURCE;
+ case HB_PAINT_COMPOSITE_MODE_DEST: return CAIRO_OPERATOR_DEST;
+ case HB_PAINT_COMPOSITE_MODE_SRC_OVER: return CAIRO_OPERATOR_OVER;
+ case HB_PAINT_COMPOSITE_MODE_DEST_OVER: return CAIRO_OPERATOR_DEST_OVER;
+ case HB_PAINT_COMPOSITE_MODE_SRC_IN: return CAIRO_OPERATOR_IN;
+ case HB_PAINT_COMPOSITE_MODE_DEST_IN: return CAIRO_OPERATOR_DEST_IN;
+ case HB_PAINT_COMPOSITE_MODE_SRC_OUT: return CAIRO_OPERATOR_OUT;
+ case HB_PAINT_COMPOSITE_MODE_DEST_OUT: return CAIRO_OPERATOR_DEST_OUT;
+ case HB_PAINT_COMPOSITE_MODE_SRC_ATOP: return CAIRO_OPERATOR_ATOP;
+ case HB_PAINT_COMPOSITE_MODE_DEST_ATOP: return CAIRO_OPERATOR_DEST_ATOP;
+ case HB_PAINT_COMPOSITE_MODE_XOR: return CAIRO_OPERATOR_XOR;
+ case HB_PAINT_COMPOSITE_MODE_PLUS: return CAIRO_OPERATOR_ADD;
+ case HB_PAINT_COMPOSITE_MODE_SCREEN: return CAIRO_OPERATOR_SCREEN;
+ case HB_PAINT_COMPOSITE_MODE_OVERLAY: return CAIRO_OPERATOR_OVERLAY;
+ case HB_PAINT_COMPOSITE_MODE_DARKEN: return CAIRO_OPERATOR_DARKEN;
+ case HB_PAINT_COMPOSITE_MODE_LIGHTEN: return CAIRO_OPERATOR_LIGHTEN;
+ case HB_PAINT_COMPOSITE_MODE_COLOR_DODGE: return CAIRO_OPERATOR_COLOR_DODGE;
+ case HB_PAINT_COMPOSITE_MODE_COLOR_BURN: return CAIRO_OPERATOR_COLOR_BURN;
+ case HB_PAINT_COMPOSITE_MODE_HARD_LIGHT: return CAIRO_OPERATOR_HARD_LIGHT;
+ case HB_PAINT_COMPOSITE_MODE_SOFT_LIGHT: return CAIRO_OPERATOR_SOFT_LIGHT;
+ case HB_PAINT_COMPOSITE_MODE_DIFFERENCE: return CAIRO_OPERATOR_DIFFERENCE;
+ case HB_PAINT_COMPOSITE_MODE_EXCLUSION: return CAIRO_OPERATOR_EXCLUSION;
+ case HB_PAINT_COMPOSITE_MODE_MULTIPLY: return CAIRO_OPERATOR_MULTIPLY;
+ case HB_PAINT_COMPOSITE_MODE_HSL_HUE: return CAIRO_OPERATOR_HSL_HUE;
+ case HB_PAINT_COMPOSITE_MODE_HSL_SATURATION: return CAIRO_OPERATOR_HSL_SATURATION;
+ case HB_PAINT_COMPOSITE_MODE_HSL_COLOR: return CAIRO_OPERATOR_HSL_COLOR;
+ case HB_PAINT_COMPOSITE_MODE_HSL_LUMINOSITY: return CAIRO_OPERATOR_HSL_LUMINOSITY;
+ default: return CAIRO_OPERATOR_CLEAR;
+ }
+}
+
+HB_INTERNAL hb_bool_t
+_hb_cairo_paint_glyph_image (hb_cairo_context_t *c,
+ hb_blob_t *blob,
+ unsigned width,
+ unsigned height,
+ hb_tag_t format,
+ float slant,
+ hb_glyph_extents_t *extents);
+
+HB_INTERNAL void
+_hb_cairo_paint_linear_gradient (hb_cairo_context_t *c,
+ hb_color_line_t *color_line,
+ float x0, float y0,
+ float x1, float y1,
+ float x2, float y2);
+
+HB_INTERNAL void
+_hb_cairo_paint_radial_gradient (hb_cairo_context_t *c,
+ hb_color_line_t *color_line,
+ float x0, float y0, float r0,
+ float x1, float y1, float r1);
+
+HB_INTERNAL void
+_hb_cairo_paint_sweep_gradient (hb_cairo_context_t *c,
+ hb_color_line_t *color_line,
+ float x0, float y0,
+ float start_angle, float end_angle);
+
+
+#endif /* HB_CAIRO_UTILS_H */