diff options
-rw-r--r-- | libass/Makefile.am | 2 | ||||
-rw-r--r-- | libass/ass_render.c | 217 | ||||
-rw-r--r-- | libass/ass_render.h | 258 |
3 files changed, 260 insertions, 217 deletions
diff --git a/libass/Makefile.am b/libass/Makefile.am index fd818ae..28c99ae 100644 --- a/libass/Makefile.am +++ b/libass/Makefile.am @@ -7,7 +7,7 @@ libass_la_SOURCES = ass.c ass_cache.c ass_font.c ass_fontconfig.c ass_render.c \ ass_utils.c ass_bitmap.c ass_library.c ass_bitmap.h \ ass_cache.h ass_fontconfig.h ass_font.h ass.h \ ass_library.h ass_types.h ass_utils.h ass_drawing.c \ - ass_drawing.h ass_cache_template.h + ass_drawing.h ass_cache_template.h ass_render.h libass_la_LDFLAGS = -version-info $(LIBASS_LT_CURRENT):$(LIBASS_LT_REVISION):$(LIBASS_LT_AGE) libass_la_LDFLAGS += -export-symbols $(srcdir)/libass.sym diff --git a/libass/ass_render.c b/libass/ass_render.c index 3d1e8e6..f970f96 100644 --- a/libass/ass_render.c +++ b/libass/ass_render.c @@ -37,6 +37,7 @@ #include "ass_fontconfig.h" #include "ass_library.h" #include "ass_drawing.h" +#include "ass_render.h" #define MAX_GLYPHS_INITIAL 1024 #define MAX_LINES_INITIAL 64 @@ -47,222 +48,6 @@ #define GLYPH_CACHE_MAX 1000 #define BITMAP_CACHE_MAX_SIZE 50 * 1048576 -typedef struct { - double xMin; - double xMax; - double yMin; - double yMax; -} DBBox; - -typedef struct { - double x; - double y; -} DVector; - -typedef struct free_list { - void *object; - struct free_list *next; -} FreeList; - -typedef struct { - int frame_width; - int frame_height; - double font_size_coeff; // font size multiplier - double line_spacing; // additional line spacing (in frame pixels) - int top_margin; // height of top margin. Everything except toptitles is shifted down by top_margin. - int bottom_margin; // height of bottom margin. (frame_height - top_margin - bottom_margin) is original video height. - int left_margin; - int right_margin; - int use_margins; // 0 - place all subtitles inside original frame - // 1 - use margins for placing toptitles and subtitles - double aspect; // frame aspect ratio, d_width / d_height. - double storage_aspect; // pixel ratio of the source image - ASS_Hinting hinting; - - char *default_font; - char *default_family; -} ASS_Settings; - -// a rendered event -typedef struct { - ASS_Image *imgs; - int top, height; - int detect_collisions; - int shift_direction; - ASS_Event *event; -} EventImages; - -typedef enum { EF_NONE = 0, EF_KARAOKE, EF_KARAOKE_KF, EF_KARAOKE_KO -} Effect; - -// describes a glyph -// GlyphInfo and TextInfo are used for text centering and word-wrapping operations -typedef struct { - unsigned symbol; - FT_Glyph glyph; - FT_Glyph outline_glyph; - Bitmap *bm; // glyph bitmap - Bitmap *bm_o; // outline bitmap - Bitmap *bm_s; // shadow bitmap - FT_BBox bbox; - FT_Vector pos; - char linebreak; // the first (leading) glyph of some line ? - uint32_t c[4]; // colors - FT_Vector advance; // 26.6 - Effect effect_type; - int effect_timing; // time duration of current karaoke word - // after process_karaoke_effects: distance in pixels from the glyph origin. - // part of the glyph to the left of it is displayed in a different color. - int effect_skip_timing; // delay after the end of last karaoke word - int asc, desc; // font max ascender and descender - int be; // blur edges - double blur; // gaussian blur - double shadow_x; - double shadow_y; - double frx, fry, frz; // rotation - double fax, fay; // text shearing - - BitmapHashKey hash_key; -} GlyphInfo; - -typedef struct { - double asc, desc; -} LineInfo; - -typedef struct { - GlyphInfo *glyphs; - int length; - LineInfo *lines; - int n_lines; - double height; - int max_glyphs; - int max_lines; -} TextInfo; - - -// Renderer state. -// Values like current font face, color, screen position, clipping and so on are stored here. -typedef struct { - ASS_Event *event; - ASS_Style *style; - - ASS_Font *font; - char *font_path; - double font_size; - int flags; // decoration flags (underline/strike-through) - - FT_Stroker stroker; - int alignment; // alignment overrides go here; if zero, style value will be used - double frx, fry, frz; - double fax, fay; // text shearing - enum { - EVENT_NORMAL, // "normal" top-, sub- or mid- title - EVENT_POSITIONED, // happens after pos(,), margins are ignored - EVENT_HSCROLL, // "Banner" transition effect, text_width is unlimited - EVENT_VSCROLL // "Scroll up", "Scroll down" transition effects - } evt_type; - double pos_x, pos_y; // position - double org_x, org_y; // origin - char have_origin; // origin is explicitly defined; if 0, get_base_point() is used - double scale_x, scale_y; - double hspacing; // distance between letters, in pixels - double border_x; // outline width - double border_y; - uint32_t c[4]; // colors(Primary, Secondary, so on) in RGBA - int clip_x0, clip_y0, clip_x1, clip_y1; - char clip_mode; // 1 = iclip - char detect_collisions; - uint32_t fade; // alpha from \fad - char be; // blur edges - double blur; // gaussian blur - double shadow_x; - double shadow_y; - int drawing_mode; // not implemented; when != 0 text is discarded, except for style override tags - ASS_Drawing *drawing; // current drawing - ASS_Drawing *clip_drawing; // clip vector - int clip_drawing_mode; // 0 = regular clip, 1 = inverse clip - - Effect effect_type; - int effect_timing; - int effect_skip_timing; - - enum { - SCROLL_LR, // left-to-right - SCROLL_RL, - SCROLL_TB, // top-to-bottom - SCROLL_BT - } scroll_direction; // for EVENT_HSCROLL, EVENT_VSCROLL - int scroll_shift; - - // face properties - char *family; - unsigned bold; - unsigned italic; - int treat_family_as_pattern; - -} RenderContext; - -typedef struct { - Hashmap *font_cache; - Hashmap *glyph_cache; - Hashmap *bitmap_cache; - Hashmap *composite_cache; - size_t glyph_max; - size_t bitmap_max_size; -} CacheStore; - -struct ass_renderer { - ASS_Library *library; - FT_Library ftlibrary; - FCInstance *fontconfig_priv; - ASS_Settings settings; - int render_id; - ASS_SynthPriv *synth_priv; - - ASS_Image *images_root; // rendering result is stored here - ASS_Image *prev_images_root; - - EventImages *eimg; // temporary buffer for sorting rendered events - int eimg_size; // allocated buffer size - - // frame-global data - int width, height; // screen dimensions - int orig_height; // frame height ( = screen height - margins ) - int orig_width; // frame width ( = screen width - margins ) - int orig_height_nocrop; // frame height ( = screen height - margins + cropheight) - int orig_width_nocrop; // frame width ( = screen width - margins + cropwidth) - ASS_Track *track; - long long time; // frame's timestamp, ms - double font_scale; - double font_scale_x; // x scale applied to all glyphs to preserve text aspect ratio - double border_scale; - - RenderContext state; - TextInfo text_info; - CacheStore cache; - - FreeList *free_head; - FreeList *free_tail; -}; - -struct render_priv { - int top, height; - int render_id; -}; - -typedef struct { - int x0; - int y0; - int x1; - int y1; -} Rect; - -typedef struct { - int a, b; // top and height -} Segment; - -/* End of type definitions */ - static void ass_lazy_track_init(ASS_Renderer *render_priv) { ASS_Track *track = render_priv->track; diff --git a/libass/ass_render.h b/libass/ass_render.h new file mode 100644 index 0000000..182989e --- /dev/null +++ b/libass/ass_render.h @@ -0,0 +1,258 @@ +/* + * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com> + * Copyright (C) 2009 Grigori Goronzy <greg@geekmind.org> + * + * This file is part of libass. + * + * libass is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * libass is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with libass; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef LIBASS_RENDER_H +#define LIBASS_RENDER_H + +#include <inttypes.h> +#include <ft2build.h> +#include FT_FREETYPE_H +#include FT_STROKER_H +#include FT_GLYPH_H +#include FT_SYNTHESIS_H + +#include "ass.h" +#include "ass_font.h" +#include "ass_bitmap.h" +#include "ass_cache.h" +#include "ass_utils.h" +#include "ass_fontconfig.h" +#include "ass_library.h" +#include "ass_drawing.h" + +typedef struct { + double xMin; + double xMax; + double yMin; + double yMax; +} DBBox; + +typedef struct { + double x; + double y; +} DVector; + +typedef struct free_list { + void *object; + struct free_list *next; +} FreeList; + +typedef struct { + int frame_width; + int frame_height; + double font_size_coeff; // font size multiplier + double line_spacing; // additional line spacing (in frame pixels) + int top_margin; // height of top margin. Everything except toptitles is shifted down by top_margin. + int bottom_margin; // height of bottom margin. (frame_height - top_margin - bottom_margin) is original video height. + int left_margin; + int right_margin; + int use_margins; // 0 - place all subtitles inside original frame + // 1 - use margins for placing toptitles and subtitles + double aspect; // frame aspect ratio, d_width / d_height. + double storage_aspect; // pixel ratio of the source image + ASS_Hinting hinting; + + char *default_font; + char *default_family; +} ASS_Settings; + +// a rendered event +typedef struct { + ASS_Image *imgs; + int top, height; + int detect_collisions; + int shift_direction; + ASS_Event *event; +} EventImages; + +typedef enum { + EF_NONE = 0, + EF_KARAOKE, + EF_KARAOKE_KF, + EF_KARAOKE_KO +} Effect; + +// describes a glyph +// GlyphInfo and TextInfo are used for text centering and word-wrapping operations +typedef struct { + unsigned symbol; + FT_Glyph glyph; + FT_Glyph outline_glyph; + Bitmap *bm; // glyph bitmap + Bitmap *bm_o; // outline bitmap + Bitmap *bm_s; // shadow bitmap + FT_BBox bbox; + FT_Vector pos; + char linebreak; // the first (leading) glyph of some line ? + uint32_t c[4]; // colors + FT_Vector advance; // 26.6 + Effect effect_type; + int effect_timing; // time duration of current karaoke word + // after process_karaoke_effects: distance in pixels from the glyph origin. + // part of the glyph to the left of it is displayed in a different color. + int effect_skip_timing; // delay after the end of last karaoke word + int asc, desc; // font max ascender and descender + int be; // blur edges + double blur; // gaussian blur + double shadow_x; + double shadow_y; + double frx, fry, frz; // rotation + double fax, fay; // text shearing + + BitmapHashKey hash_key; +} GlyphInfo; + +typedef struct { + double asc, desc; +} LineInfo; + +typedef struct { + GlyphInfo *glyphs; + int length; + LineInfo *lines; + int n_lines; + double height; + int max_glyphs; + int max_lines; +} TextInfo; + +// Renderer state. +// Values like current font face, color, screen position, clipping and so on are stored here. +typedef struct { + ASS_Event *event; + ASS_Style *style; + + ASS_Font *font; + char *font_path; + double font_size; + int flags; // decoration flags (underline/strike-through) + + FT_Stroker stroker; + int alignment; // alignment overrides go here; if zero, style value will be used + double frx, fry, frz; + double fax, fay; // text shearing + enum { + EVENT_NORMAL, // "normal" top-, sub- or mid- title + EVENT_POSITIONED, // happens after pos(,), margins are ignored + EVENT_HSCROLL, // "Banner" transition effect, text_width is unlimited + EVENT_VSCROLL // "Scroll up", "Scroll down" transition effects + } evt_type; + double pos_x, pos_y; // position + double org_x, org_y; // origin + char have_origin; // origin is explicitly defined; if 0, get_base_point() is used + double scale_x, scale_y; + double hspacing; // distance between letters, in pixels + double border_x; // outline width + double border_y; + uint32_t c[4]; // colors(Primary, Secondary, so on) in RGBA + int clip_x0, clip_y0, clip_x1, clip_y1; + char clip_mode; // 1 = iclip + char detect_collisions; + uint32_t fade; // alpha from \fad + char be; // blur edges + double blur; // gaussian blur + double shadow_x; + double shadow_y; + int drawing_mode; // not implemented; when != 0 text is discarded, except for style override tags + ASS_Drawing *drawing; // current drawing + ASS_Drawing *clip_drawing; // clip vector + int clip_drawing_mode; // 0 = regular clip, 1 = inverse clip + + Effect effect_type; + int effect_timing; + int effect_skip_timing; + + enum { + SCROLL_LR, // left-to-right + SCROLL_RL, + SCROLL_TB, // top-to-bottom + SCROLL_BT + } scroll_direction; // for EVENT_HSCROLL, EVENT_VSCROLL + int scroll_shift; + + // face properties + char *family; + unsigned bold; + unsigned italic; + int treat_family_as_pattern; + +} RenderContext; + +typedef struct { + Hashmap *font_cache; + Hashmap *glyph_cache; + Hashmap *bitmap_cache; + Hashmap *composite_cache; + size_t glyph_max; + size_t bitmap_max_size; +} CacheStore; + +struct ass_renderer { + ASS_Library *library; + FT_Library ftlibrary; + FCInstance *fontconfig_priv; + ASS_Settings settings; + int render_id; + ASS_SynthPriv *synth_priv; + + ASS_Image *images_root; // rendering result is stored here + ASS_Image *prev_images_root; + + EventImages *eimg; // temporary buffer for sorting rendered events + int eimg_size; // allocated buffer size + + // frame-global data + int width, height; // screen dimensions + int orig_height; // frame height ( = screen height - margins ) + int orig_width; // frame width ( = screen width - margins ) + int orig_height_nocrop; // frame height ( = screen height - margins + cropheight) + int orig_width_nocrop; // frame width ( = screen width - margins + cropwidth) + ASS_Track *track; + long long time; // frame's timestamp, ms + double font_scale; + double font_scale_x; // x scale applied to all glyphs to preserve text aspect ratio + double border_scale; + + RenderContext state; + TextInfo text_info; + CacheStore cache; + + FreeList *free_head; + FreeList *free_tail; +}; + +typedef struct render_priv { + int top, height; + int render_id; +} RenderPriv; + +typedef struct { + int x0; + int y0; + int x1; + int y1; +} Rect; + +typedef struct { + int a, b; // top and height +} Segment; + +#endif /* LIBASS_RENDER_H */ |