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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /modules/freetype2/src/sdf/ftsdfrend.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/freetype2/src/sdf/ftsdfrend.h')
-rw-r--r-- | modules/freetype2/src/sdf/ftsdfrend.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/modules/freetype2/src/sdf/ftsdfrend.h b/modules/freetype2/src/sdf/ftsdfrend.h new file mode 100644 index 0000000000..571ac833d3 --- /dev/null +++ b/modules/freetype2/src/sdf/ftsdfrend.h @@ -0,0 +1,118 @@ +/**************************************************************************** + * + * ftsdfrend.h + * + * Signed Distance Field renderer interface (specification). + * + * Copyright (C) 2020-2023 by + * David Turner, Robert Wilhelm, and Werner Lemberg. + * + * Written by Anuj Verma. + * + * This file is part of the FreeType project, and may only be used, + * modified, and distributed under the terms of the FreeType project + * license, LICENSE.TXT. By continuing to use, modify, or distribute + * this file you indicate that you have read the license and + * understand and accept it fully. + * + */ + + +#ifndef FTSDFREND_H_ +#define FTSDFREND_H_ + +#include <freetype/ftrender.h> +#include <freetype/ftmodapi.h> +#include <freetype/internal/ftobjs.h> + +FT_BEGIN_HEADER + + + /************************************************************************** + * + * @struct: + * SDF_Renderer_Module + * + * @description: + * This struct extends the native renderer struct `FT_RendererRec`. It + * is basically used to store various parameters required by the + * renderer and some additional parameters that can be used to tweak the + * output of the renderer. + * + * @fields: + * root :: + * The native rendere struct. + * + * spread :: + * This is an essential parameter/property required by the renderer. + * `spread` defines the maximum unsigned value that is present in the + * final SDF output. For the default value check file + * `ftsdfcommon.h`. + * + * flip_sign :: + * By default positive values indicate positions inside of contours, + * i.e., filled by a contour. If this property is true then that + * output will be the opposite of the default, i.e., negative values + * indicate positions inside of contours. + * + * flip_y :: + * Setting this parameter to true makes the output image flipped + * along the y-axis. + * + * overlaps :: + * Set this to true to generate SDF for glyphs having overlapping + * contours. The overlapping support is limited to glyphs that do not + * have self-intersecting contours. Also, removing overlaps require a + * considerable amount of extra memory; additionally, it will not work + * if generating SDF from bitmap. + * + * @note: + * All properties except `overlaps` are valid for both the 'sdf' and + * 'bsdf' renderers. + * + */ + typedef struct SDF_Renderer_Module_ + { + FT_RendererRec root; + FT_UInt spread; + FT_Bool flip_sign; + FT_Bool flip_y; + FT_Bool overlaps; + + } SDF_Renderer_Module, *SDF_Renderer; + + + /************************************************************************** + * + * @renderer: + * ft_sdf_renderer_class + * + * @description: + * Renderer to convert @FT_Outline to signed distance fields. + * + */ + FT_DECLARE_RENDERER( ft_sdf_renderer_class ) + + + /************************************************************************** + * + * @renderer: + * ft_bitmap_sdf_renderer_class + * + * @description: + * This is not exactly a renderer; it is just a converter that + * transforms bitmaps to signed distance fields. + * + * @note: + * This is not a separate module, it is part of the 'sdf' module. + * + */ + FT_DECLARE_RENDERER( ft_bitmap_sdf_renderer_class ) + + +FT_END_HEADER + +#endif /* FTSDFREND_H_ */ + + +/* END */ |