Factor out renderer types into separate file

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 */