Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 703 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/hb-paint.cc b/gfx/harfbuzz/src/hb-paint.cc
new file mode 100644
index 0000000000..28150f1638
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-paint.cc
@@ -0,0 +1,703 @@
+/*
+ * Copyright © 2022 Matthias Clasen
+ *
+ *  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.
+ */
+
+#include "hb.hh"
+
+#ifndef HB_NO_PAINT
+
+#include "hb-paint.hh"
+
+/**
+ * SECTION: hb-paint
+ * @title: hb-paint
+ * @short_description: Glyph painting
+ * @include: hb.h
+ *
+ * Functions for painting glyphs.
+ *
+ * The main purpose of these functions is to paint (extract) color glyph layers
+ * from the COLRv1 table, but the API works for drawing ordinary outlines and
+ * images as well.
+ *
+ * The #hb_paint_funcs_t struct can be used with hb_font_paint_glyph().
+ **/
+
+static void
+hb_paint_push_transform_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                             float xx, float yx,
+                             float xy, float yy,
+                             float dx, float dy,
+                             void *user_data) {}
+
+static void
+hb_paint_pop_transform_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                            void *user_data) {}
+
+static void
+hb_paint_push_clip_glyph_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                              hb_codepoint_t glyph,
+                              hb_font_t *font,
+                              void *user_data) {}
+
+static void
+hb_paint_push_clip_rectangle_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                                  float xmin, float ymin, float xmax, float ymax,
+                                  void *user_data) {}
+
+static void
+hb_paint_pop_clip_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                       void *user_data) {}
+
+static void
+hb_paint_color_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                    hb_bool_t is_foreground,
+                    hb_color_t color,
+                    void *user_data) {}
+
+static hb_bool_t
+hb_paint_image_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                    hb_blob_t *image,
+                    unsigned int width,
+                    unsigned int height,
+                    hb_tag_t format,
+                    float slant_xy,
+                    hb_glyph_extents_t *extents,
+                    void *user_data) { return false; }
+
+static void
+hb_paint_linear_gradient_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                              hb_color_line_t *color_line,
+                              float x0, float y0,
+                              float x1, float y1,
+                              float x2, float y2,
+                              void *user_data) {}
+
+static void
+hb_paint_radial_gradient_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                              hb_color_line_t *color_line,
+                              float x0, float y0, float r0,
+                              float x1, float y1, float r1,
+                              void *user_data) {}
+
+static void
+hb_paint_sweep_gradient_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                             hb_color_line_t *color_line,
+                             float x0, float y0,
+                             float start_angle,
+                             float end_angle,
+                             void *user_data) {}
+
+static void
+hb_paint_push_group_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                         void *user_data) {}
+
+static void
+hb_paint_pop_group_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                        hb_paint_composite_mode_t mode,
+                        void *user_data) {}
+
+static hb_bool_t
+hb_paint_custom_palette_color_nil (hb_paint_funcs_t *funcs, void *paint_data,
+                                   unsigned int color_index,
+                                   hb_color_t *color,
+                                   void *user_data) { return false; }
+
+static bool
+_hb_paint_funcs_set_preamble (hb_paint_funcs_t  *funcs,
+                             bool                func_is_null,
+                             void              **user_data,
+                             hb_destroy_func_t  *destroy)
+{
+  if (hb_object_is_immutable (funcs))
+  {
+    if (*destroy)
+      (*destroy) (*user_data);
+    return false;
+  }
+
+  if (func_is_null)
+  {
+    if (*destroy)
+      (*destroy) (*user_data);
+    *destroy = nullptr;
+    *user_data = nullptr;
+  }
+
+  return true;
+}
+
+static bool
+_hb_paint_funcs_set_middle (hb_paint_funcs_t  *funcs,
+                            void              *user_data,
+                            hb_destroy_func_t  destroy)
+{
+  if (user_data && !funcs->user_data)
+  {
+    funcs->user_data = (decltype (funcs->user_data)) hb_calloc (1, sizeof (*funcs->user_data));
+    if (unlikely (!funcs->user_data))
+      goto fail;
+  }
+  if (destroy && !funcs->destroy)
+  {
+    funcs->destroy = (decltype (funcs->destroy)) hb_calloc (1, sizeof (*funcs->destroy));
+    if (unlikely (!funcs->destroy))
+      goto fail;
+  }
+
+  return true;
+
+fail:
+  if (destroy)
+    (destroy) (user_data);
+  return false;
+}
+
+#define HB_PAINT_FUNC_IMPLEMENT(name)                                           \
+                                                                                \
+void                                                                            \
+hb_paint_funcs_set_##name##_func (hb_paint_funcs_t         *funcs,              \
+                                  hb_paint_##name##_func_t  func,               \
+                                  void                     *user_data,          \
+                                  hb_destroy_func_t         destroy)            \
+{                                                                               \
+  if (!_hb_paint_funcs_set_preamble (funcs, !func, &user_data, &destroy))       \
+      return;                                                                   \
+                                                                                \
+  if (funcs->destroy && funcs->destroy->name)                                   \
+    funcs->destroy->name (!funcs->user_data ? nullptr : funcs->user_data->name);\
+                                                                                \
+  if (!_hb_paint_funcs_set_middle (funcs, user_data, destroy))                  \
+      return;                                                                   \
+                                                                                \
+  if (func)                                                                     \
+    funcs->func.name = func;                                                    \
+  else                                                                          \
+    funcs->func.name = hb_paint_##name##_nil;                                   \
+                                                                                \
+  if (funcs->user_data)                                                         \
+    funcs->user_data->name = user_data;                                         \
+  if (funcs->destroy)                                                           \
+    funcs->destroy->name = destroy;                                             \
+}
+
+HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_PAINT_FUNC_IMPLEMENT
+
+/**
+ * hb_paint_funcs_create:
+ *
+ * Creates a new #hb_paint_funcs_t structure of paint functions.
+ *
+ * The initial reference count of 1 should be released with hb_paint_funcs_destroy()
+ * when you are done using the #hb_paint_funcs_t. This function never returns
+ * `NULL`. If memory cannot be allocated, a special singleton #hb_paint_funcs_t
+ * object will be returned.
+ *
+ * Returns value: (transfer full): the paint-functions structure
+ *
+ * Since: 7.0.0
+ */
+hb_paint_funcs_t *
+hb_paint_funcs_create ()
+{
+  hb_paint_funcs_t *funcs;
+  if (unlikely (!(funcs = hb_object_create<hb_paint_funcs_t> ())))
+    return const_cast<hb_paint_funcs_t *> (&Null (hb_paint_funcs_t));
+
+  funcs->func =  Null (hb_paint_funcs_t).func;
+
+  return funcs;
+}
+
+DEFINE_NULL_INSTANCE (hb_paint_funcs_t) =
+{
+  HB_OBJECT_HEADER_STATIC,
+
+  {
+#define HB_PAINT_FUNC_IMPLEMENT(name) hb_paint_##name##_nil,
+    HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_PAINT_FUNC_IMPLEMENT
+  }
+};
+
+/**
+ * hb_paint_funcs_get_empty:
+ *
+ * Fetches the singleton empty paint-functions structure.
+ *
+ * Return value: (transfer full): The empty paint-functions structure
+ *
+ * Since: 7.0.0
+ **/
+hb_paint_funcs_t *
+hb_paint_funcs_get_empty ()
+{
+  return const_cast<hb_paint_funcs_t *> (&Null (hb_paint_funcs_t));
+}
+
+/**
+ * hb_paint_funcs_reference: (skip)
+ * @funcs: The paint-functions structure
+ *
+ * Increases the reference count on a paint-functions structure.
+ *
+ * This prevents @funcs from being destroyed until a matching
+ * call to hb_paint_funcs_destroy() is made.
+ *
+ * Return value: The paint-functions structure
+ *
+ * Since: 7.0.0
+ */
+hb_paint_funcs_t *
+hb_paint_funcs_reference (hb_paint_funcs_t *funcs)
+{
+  return hb_object_reference (funcs);
+}
+
+/**
+ * hb_paint_funcs_destroy: (skip)
+ * @funcs: The paint-functions structure
+ *
+ * Decreases the reference count on a paint-functions structure.
+ *
+ * When the reference count reaches zero, the structure
+ * is destroyed, freeing all memory.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_funcs_destroy (hb_paint_funcs_t *funcs)
+{
+  if (!hb_object_destroy (funcs)) return;
+
+  if (funcs->destroy)
+  {
+#define HB_PAINT_FUNC_IMPLEMENT(name) \
+    if (funcs->destroy->name) funcs->destroy->name (!funcs->user_data ? nullptr : funcs->user_data->name);
+      HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_PAINT_FUNC_IMPLEMENT
+  }
+
+  hb_free (funcs->destroy);
+  hb_free (funcs->user_data);
+  hb_free (funcs);
+}
+
+/**
+ * hb_paint_funcs_set_user_data: (skip)
+ * @funcs: The paint-functions structure
+ * @key: The user-data key
+ * @data: A pointer to the user data
+ * @destroy: (nullable): A callback to call when @data is not needed anymore
+ * @replace: Whether to replace an existing data with the same key
+ *
+ * Attaches a user-data key/data pair to the specified paint-functions structure.
+ *
+ * Return value: `true` if success, `false` otherwise
+ *
+ * Since: 7.0.0
+ **/
+hb_bool_t
+hb_paint_funcs_set_user_data (hb_paint_funcs_t *funcs,
+			     hb_user_data_key_t *key,
+			     void *              data,
+			     hb_destroy_func_t   destroy,
+			     hb_bool_t           replace)
+{
+  return hb_object_set_user_data (funcs, key, data, destroy, replace);
+}
+
+/**
+ * hb_paint_funcs_get_user_data: (skip)
+ * @funcs: The paint-functions structure
+ * @key: The user-data key to query
+ *
+ * Fetches the user-data associated with the specified key,
+ * attached to the specified paint-functions structure.
+ *
+ * Return value: (transfer none): A pointer to the user data
+ *
+ * Since: 7.0.0
+ **/
+void *
+hb_paint_funcs_get_user_data (const hb_paint_funcs_t *funcs,
+			     hb_user_data_key_t       *key)
+{
+  return hb_object_get_user_data (funcs, key);
+}
+
+/**
+ * hb_paint_funcs_make_immutable:
+ * @funcs: The paint-functions structure
+ *
+ * Makes a paint-functions structure immutable.
+ *
+ * After this call, all attempts to set one of the callbacks
+ * on @funcs will fail.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_funcs_make_immutable (hb_paint_funcs_t *funcs)
+{
+  if (hb_object_is_immutable (funcs))
+    return;
+
+  hb_object_make_immutable (funcs);
+}
+
+/**
+ * hb_paint_funcs_is_immutable:
+ * @funcs: The paint-functions structure
+ *
+ * Tests whether a paint-functions structure is immutable.
+ *
+ * Return value: `true` if @funcs is immutable, `false` otherwise
+ *
+ * Since: 7.0.0
+ */
+hb_bool_t
+hb_paint_funcs_is_immutable (hb_paint_funcs_t *funcs)
+{
+  return hb_object_is_immutable (funcs);
+}
+
+
+/**
+ * hb_color_line_get_color_stops:
+ * @color_line: a #hb_color_line_t object
+ * @start: the index of the first color stop to return
+ * @count: (inout) (optional): Input = the maximum number of feature tags to return;
+ *     Output = the actual number of feature tags returned (may be zero)
+ * @color_stops: (out) (array length=count) (optional): Array of #hb_color_stop_t to populate
+ *
+ * Fetches a list of color stops from the given color line object.
+ *
+ * Note that due to variations being applied, the returned color stops
+ * may be out of order. It is the callers responsibility to ensure that
+ * color stops are sorted by their offset before they are used.
+ *
+ * Return value: the total number of color stops in @color_line
+ *
+ * Since: 7.0.0
+ */
+unsigned int
+hb_color_line_get_color_stops (hb_color_line_t *color_line,
+                               unsigned int start,
+                               unsigned int *count,
+                               hb_color_stop_t *color_stops)
+{
+  return color_line->get_color_stops (color_line,
+				      color_line->data,
+				      start, count,
+				      color_stops,
+				      color_line->get_color_stops_user_data);
+}
+
+/**
+ * hb_color_line_get_extend:
+ * @color_line: a #hb_color_line_t object
+ *
+ * Fetches the extend mode of the color line object.
+ *
+ * Return value: the extend mode of @color_line
+ *
+ * Since: 7.0.0
+ */
+hb_paint_extend_t
+hb_color_line_get_extend (hb_color_line_t *color_line)
+{
+  return color_line->get_extend (color_line,
+				 color_line->data,
+				 color_line->get_extend_user_data);
+}
+
+
+/**
+ * hb_paint_push_transform:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @xx: xx component of the transform matrix
+ * @yx: yx component of the transform matrix
+ * @xy: xy component of the transform matrix
+ * @yy: yy component of the transform matrix
+ * @dx: dx component of the transform matrix
+ * @dy: dy component of the transform matrix
+ *
+ * Perform a "push-transform" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_push_transform (hb_paint_funcs_t *funcs, void *paint_data,
+                         float xx, float yx,
+                         float xy, float yy,
+                         float dx, float dy)
+{
+  funcs->push_transform (paint_data, xx, yx, xy, yy, dx, dy);
+}
+
+/**
+ * hb_paint_pop_transform:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ *
+ * Perform a "pop-transform" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_pop_transform (hb_paint_funcs_t *funcs, void *paint_data)
+{
+  funcs->pop_transform (paint_data);
+}
+
+/**
+ * hb_paint_push_clip_glyph:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @glyph: the glyph ID
+ * @font: the font
+ *
+ * Perform a "push-clip-glyph" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_push_clip_glyph (hb_paint_funcs_t *funcs, void *paint_data,
+                          hb_codepoint_t glyph,
+                          hb_font_t *font)
+{
+  funcs->push_clip_glyph (paint_data, glyph, font);
+}
+
+/**
+ * hb_paint_push_clip_rectangle:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @xmin: min X for the rectangle
+ * @ymin: min Y for the rectangle
+ * @xmax: max X for the rectangle
+ * @ymax: max Y for the rectangle
+ *
+ * Perform a "push-clip-rect" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_push_clip_rectangle (hb_paint_funcs_t *funcs, void *paint_data,
+                              float xmin, float ymin, float xmax, float ymax)
+{
+  funcs->push_clip_rectangle (paint_data, xmin, ymin, xmax, ymax);
+}
+
+/**
+ * hb_paint_pop_clip:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ *
+ * Perform a "pop-clip" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_pop_clip (hb_paint_funcs_t *funcs, void *paint_data)
+{
+  funcs->pop_clip (paint_data);
+}
+
+/**
+ * hb_paint_color:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @is_foreground: whether the color is the foreground
+ * @color: The color to use
+ *
+ * Perform a "color" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_color (hb_paint_funcs_t *funcs, void *paint_data,
+                hb_bool_t is_foreground,
+                hb_color_t color)
+{
+  funcs->color (paint_data, is_foreground, color);
+}
+
+/**
+ * hb_paint_image:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @image: image data
+ * @width: width of the raster image in pixels, or 0
+ * @height: height of the raster image in pixels, or 0
+ * @format: the image format as a tag
+ * @slant: the synthetic slant ratio to be applied to the image during rendering
+ * @extents: (nullable): the extents of the glyph
+ *
+ * Perform a "image" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_image (hb_paint_funcs_t *funcs, void *paint_data,
+                hb_blob_t *image,
+                unsigned int width,
+                unsigned int height,
+                hb_tag_t format,
+                float slant,
+                hb_glyph_extents_t *extents)
+{
+  funcs->image (paint_data, image, width, height, format, slant, extents);
+}
+
+/**
+ * hb_paint_linear_gradient:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @color_line: Color information for the gradient
+ * @x0: X coordinate of the first point
+ * @y0: Y coordinate of the first point
+ * @x1: X coordinate of the second point
+ * @y1: Y coordinate of the second point
+ * @x2: X coordinate of the third point
+ * @y2: Y coordinate of the third point
+ *
+ * Perform a "linear-gradient" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_linear_gradient (hb_paint_funcs_t *funcs, void *paint_data,
+                          hb_color_line_t *color_line,
+                          float x0, float y0,
+                          float x1, float y1,
+                          float x2, float y2)
+{
+  funcs->linear_gradient (paint_data, color_line, x0, y0, x1, y1, x2, y2);
+}
+
+/**
+ * hb_paint_radial_gradient:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @color_line: Color information for the gradient
+ * @x0: X coordinate of the first circle's center
+ * @y0: Y coordinate of the first circle's center
+ * @r0: radius of the first circle
+ * @x1: X coordinate of the second circle's center
+ * @y1: Y coordinate of the second circle's center
+ * @r1: radius of the second circle
+ *
+ * Perform a "radial-gradient" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_radial_gradient (hb_paint_funcs_t *funcs, void *paint_data,
+                          hb_color_line_t *color_line,
+                          float x0, float y0, float r0,
+                          float x1, float y1, float r1)
+{
+  funcs->radial_gradient (paint_data, color_line, x0, y0, r0, y1, x1, r1);
+}
+
+/**
+ * hb_paint_sweep_gradient:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @color_line: Color information for the gradient
+ * @x0: X coordinate of the circle's center
+ * @y0: Y coordinate of the circle's center
+ * @start_angle: the start angle
+ * @end_angle: the end angle
+ *
+ * Perform a "sweep-gradient" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_sweep_gradient (hb_paint_funcs_t *funcs, void *paint_data,
+                         hb_color_line_t *color_line,
+                         float x0, float y0,
+                         float start_angle, float end_angle)
+{
+  funcs->sweep_gradient (paint_data, color_line, x0, y0, start_angle, end_angle);
+}
+
+/**
+ * hb_paint_push_group:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ *
+ * Perform a "push-group" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_push_group (hb_paint_funcs_t *funcs, void *paint_data)
+{
+  funcs->push_group (paint_data);
+}
+
+/**
+ * hb_paint_pop_group:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @mode: the compositing mode to use
+ *
+ * Perform a "pop-group" paint operation.
+ *
+ * Since: 7.0.0
+ */
+void
+hb_paint_pop_group (hb_paint_funcs_t *funcs, void *paint_data,
+                    hb_paint_composite_mode_t mode)
+{
+  funcs->pop_group (paint_data, mode);
+}
+
+/**
+ * hb_paint_custom_palette_color:
+ * @funcs: paint functions
+ * @paint_data: associated data passed by the caller
+ * @color_index: color index
+ * @color: (out): fetched color
+ *
+ * Gets the custom palette color for @color_index.
+ *
+ * Return value: `true` if found, `false` otherwise
+ *
+ * Since: 7.0.0
+ */
+hb_bool_t
+hb_paint_custom_palette_color (hb_paint_funcs_t *funcs, void *paint_data,
+                               unsigned int color_index,
+                               hb_color_t *color)
+{
+  return funcs->custom_palette_color (paint_data, color_index, color);
+}
+
+#endif