From e15ae9a60043d8d9c1b110607c5059f13ca86421 Mon Sep 17 00:00:00 2001 From: eugeni Date: Fri, 7 Jul 2006 18:26:51 +0000 Subject: Initial libass release (without mencoder support). git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18942 b3059339-0415-0410-9bf9-f77b7e298cf2 --- libass/ass_render.c | 1766 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1766 insertions(+) create mode 100644 libass/ass_render.c (limited to 'libass/ass_render.c') diff --git a/libass/ass_render.c b/libass/ass_render.c new file mode 100644 index 0000000000..1723394830 --- /dev/null +++ b/libass/ass_render.c @@ -0,0 +1,1766 @@ +#include "config.h" + +#include +#include +#include +#include +#include FT_FREETYPE_H +#include FT_STROKER_H +#include FT_GLYPH_H +#include FT_SYNTHESIS_H + +#include "mp_msg.h" + +#include "ass.h" +#include "ass_cache.h" +#include "ass_utils.h" +#include "ass_fontconfig.h" + +#include "libvo/sub.h" // for utf8_get_char + +#define MAX_GLYPHS 1000 +#define MAX_LINES 100 + +char *get_path(char *); + +extern char *font_name; +#ifdef HAVE_FONTCONFIG +extern int font_fontconfig; +#else +static int font_fontconfig = 0; +#endif + +struct ass_instance_s { + FT_Library library; + fc_instance_t* fontconfig_priv; + ass_settings_t settings; + + ass_image_t* images_root; // rendering result is stored here + int n_images; + int max_images; +}; + +int no_more_font_messages = 0; // don't print font warnings + +typedef enum {EF_NONE = 0, EF_KARAOKE, EF_KARAOKE_KF, EF_KARAOKE_KO} effect_t; + +// describes a glyph +// glyph_info_t and text_info_t are used for text centering and word-wrapping operations +typedef struct glyph_info_s { + unsigned symbol; + FT_Glyph glyph; + FT_Glyph outline_glyph; + FT_BBox bbox; + FT_Vector pos; + char linebreak; // the first (leading) glyph of some line ? + uint32_t c1, c2, c3, c4; // colors + char bitmap; // bool + FT_Vector advance; // 26.6 + effect_t effect_type; + int effect_timing; + int asc, desc; // font max ascender and descender +// int height; + + glyph_hash_key_t hash_key; +} glyph_info_t; + +typedef struct line_info_s { + int asc, desc; +} line_info_t; + +typedef struct text_info_s { + glyph_info_t* glyphs; + int length; + line_info_t lines[MAX_LINES]; + int n_lines; + int height; +} text_info_t; + + +// Renderer state. +// Values like current font face, color, screen position, clipping and so on are stored here. +typedef struct render_context_s { + ass_event_t* event; + ass_style_t* style; + + FT_Face face; + char* font_path; + int font_size; + + FT_Stroker stroker; + int alignment; // alignment overrides go here; if zero, style value will be used + double rotation; + enum { EVENT_NORMAL, // "normal" top-, sub- or mid- title + EVENT_POSITIONED // happens after pos(,), margins are ignored + } evt_type; + int pos_x, pos_y; // position + int org_x, org_y; // origin + double scale_x, scale_y; + int hspacing; // distance between letters, in pixels + double border; // outline width + uint32_t c1, c2, c3, c4; // colors(Primary, Secondary, so on) in RGBA + int clip_x0, clip_y0, clip_x1, clip_y1; + char detect_collisions; + + effect_t effect_type; + int effect_timing; + + // face properties + char* family; + unsigned bold; + unsigned italic; + +} render_context_t; + +// frame-global data +typedef struct frame_context_s { + ass_instance_t* ass_priv; + int width, height; // screen dimensions + int orig_height; // frame height ( = screen height - margins ) + ass_track_t* track; + int add_bottom_margin; // additional margin, used to shift subtitles in case of collision + int add_top_margin; + long long time; // frame's timestamp, ms + double font_scale_x; // x scale applied to all glyphs to preserve text aspect ratio +} frame_context_t; + +static ass_instance_t* ass_instance; +static ass_settings_t* global_settings; +static text_info_t text_info; +static render_context_t render_context; +static frame_context_t frame_context; + +static void ass_lazy_track_init(void) +{ + ass_track_t* track = frame_context.track; + if (track->PlayResX && track->PlayResY) + return; + if (!track->PlayResX && !track->PlayResY) { + mp_msg(MSGT_GLOBAL, MSGL_WARN, "Neither PlayResX nor PlayResY defined. Assuming 384x288. \n"); + track->PlayResX = 384; + track->PlayResY = 288; + } else { + double orig_aspect = (global_settings->aspect * frame_context.height) / frame_context.orig_height; + if (!track->PlayResY) { + track->PlayResY = track->PlayResX / orig_aspect + .5; + mp_msg(MSGT_GLOBAL, MSGL_WARN, "PlayResY undefined, setting %d \n", track->PlayResY); + } else if (!track->PlayResX) { + track->PlayResX = track->PlayResY * orig_aspect + .5; + mp_msg(MSGT_GLOBAL, MSGL_WARN, "PlayResX undefined, setting %d \n", track->PlayResX); + } + } +} + +ass_instance_t* ass_init(void) +{ + char* family = 0; + char* path = 0; + char* fonts_path = 0; + int error; + fc_instance_t* fc_priv; + FT_Library ft; + ass_instance_t* priv; + + if (font_fontconfig && font_name) + family = strdup(font_name); + + if (!font_fontconfig && font_name) + path = strdup(font_name); + else + path = get_path("subfont.ttf"); + + fonts_path = get_path("fonts"); + + fc_priv = fontconfig_init(fonts_path, family, path); + + free(fonts_path); + if (path) free(path); + if (family) free(family); + + if (!fc_priv) + return 0; + + error = FT_Init_FreeType( &ft ); + if ( error ) { + mp_msg(MSGT_GLOBAL, MSGL_FATAL, "FT_Init_FreeType failed\n"); + fontconfig_done(fc_priv); + return 0; + } + + priv = calloc(1, sizeof(ass_instance_t)); + if (!priv) { + FT_Done_FreeType(ft); + fontconfig_done(fc_priv); + return 0; + } + priv->library = ft; + priv->fontconfig_priv = fc_priv; + // images_root and related stuff is zero-filled in calloc + + ass_face_cache_init(); + ass_glyph_cache_init(); + + text_info.glyphs = calloc(MAX_GLYPHS, sizeof(glyph_info_t)); + + return priv; +} + +void ass_done(ass_instance_t* priv) +{ + ass_face_cache_done(); + ass_glyph_cache_done(); + if (priv && priv->library) FT_Done_FreeType(priv->library); + if (priv && priv->fontconfig_priv) fontconfig_done(priv->fontconfig_priv); + if (priv) free(priv); + if (text_info.glyphs) free(text_info.glyphs); +} + +/** + * \brief Create a new ass_image_t and append it to images_root + * Parameters are the same as ass_image_t fields. + */ +static void my_draw_bitmap(unsigned char* bitmap, int bitmap_w, int bitmap_h, int stride, int dst_x, int dst_y, uint32_t color) +{ + ass_instance_t* priv = ass_instance; + ass_image_t* img; + + assert(priv->n_images <= priv->max_images); + if (priv->n_images == priv->max_images) { + if (!priv->max_images) priv->max_images = 100; + else priv->max_images *= 2; + priv->images_root = (ass_image_t*)realloc(priv->images_root, priv->max_images * sizeof(ass_image_t)); + } + assert(priv->images_root); + img = priv->images_root + priv->n_images; + + img->w = bitmap_w; + img->h = bitmap_h; + img->stride = stride; + img->bitmap = bitmap; + img->color = color; + img->dst_x = dst_x; + img->dst_y = dst_y; + + priv->n_images++; +} + +/** + * \brief convert bitmap glyph into ass_image_t struct(s) + * \param bit freetype bitmap glyph, FT_PIXEL_MODE_GRAY + * \param dst_x bitmap x coordinate in video frame + * \param dst_y bitmap y coordinate in video frame + * \param color first color, RGBA + * \param color2 second color, RGBA + * \param brk x coordinate relative to glyph origin, color is used to the left of brk, color2 - to the right + * Performs clipping. Uses my_draw_bitmap for actual bitmap convertion. + */ +static int render_glyph(FT_BitmapGlyph bit, int dst_x, int dst_y, uint32_t color, uint32_t color2, int brk) +{ + // brk is relative to dst_x + // color = color left of brk + // color2 = color right of brk + int b_x0, b_y0, b_x1, b_y1; // visible part of the bitmap + int clip_x0, clip_y0, clip_x1, clip_y1; + int tmp; + FT_Bitmap* bitmap; + + bitmap = &(bit->bitmap); + dst_x += bit->left; + dst_y -= bit->top; + brk -= bit->left; + + if (bitmap->pixel_mode != FT_PIXEL_MODE_GRAY) { + mp_msg(MSGT_GLOBAL, MSGL_WARN, "Unsupported pixel mode: %d\n", (int)(bitmap->pixel_mode)); + return 1; + } + + // clipping + clip_x0 = render_context.clip_x0; + clip_y0 = render_context.clip_y0; + clip_x1 = render_context.clip_x1; + clip_y1 = render_context.clip_y1; + b_x0 = 0; + b_y0 = 0; + b_x1 = bitmap->width; + b_y1 = bitmap->rows; + + tmp = dst_x - clip_x0; + if (tmp < 0) { + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "clip left\n"); + b_x0 = - tmp; + } + tmp = dst_y - clip_y0; + if (tmp < 0) { + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "clip top\n"); + b_y0 = - tmp; + } + tmp = clip_x1 - dst_x - bitmap->width; + if (tmp < 0) { + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "clip right\n"); + b_x1 = bitmap->width + tmp; + } + tmp = clip_y1 - dst_y - bitmap->rows; + if (tmp < 0) { + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "clip bottom\n"); + b_y1 = bitmap->rows + tmp; + } + + if ((b_y0 >= b_y1) || (b_x0 >= b_x1)) + return 0; + + if (brk > b_x0) { // draw left part + if (brk > b_x1) brk = b_x1; + my_draw_bitmap(bitmap->buffer + bitmap->pitch * b_y0 + b_x0, + brk - b_x0, b_y1 - b_y0, bitmap->pitch, + dst_x + b_x0, dst_y + b_y0, color); + } + if (brk < b_x1) { // draw right part + if (brk < b_x0) brk = b_x0; + my_draw_bitmap(bitmap->buffer + bitmap->pitch * b_y0 + brk, + b_x1 - brk, b_y1 - b_y0, bitmap->pitch, + dst_x + brk, dst_y + b_y0, color2); + + } + return 0; +} + +/** + * \brief Render text_info_t struct into ass_images_t list + * Rasterize glyphs and put them in glyph cache. + */ +static int render_text(text_info_t* text_info, int dst_x, int dst_y) +{ + int pen_x, pen_y; + int error, error2; + int i; + FT_Glyph image; + FT_BitmapGlyph bit; + glyph_hash_val_t hash_val; + + for (i = 0; i < text_info->length; ++i) { + if (text_info->glyphs[i].bitmap != 1) { + if ((text_info->glyphs[i].symbol == '\n') || (text_info->glyphs[i].symbol == 0)) + continue; + error = FT_Glyph_To_Bitmap( &(text_info->glyphs[i].outline_glyph), FT_RENDER_MODE_NORMAL, 0, 1); + error2 = FT_Glyph_To_Bitmap( &(text_info->glyphs[i].glyph), FT_RENDER_MODE_NORMAL, 0, 1); + + if (error || error2) { + FT_Done_Glyph(text_info->glyphs[i].outline_glyph); + FT_Done_Glyph(text_info->glyphs[i].glyph); + mp_msg(MSGT_GLOBAL, MSGL_WARN, "FT_Glyph_To_Bitmap error %d %d, symbol %d, index %d\n", + error, error2, text_info->glyphs[i].symbol, text_info->glyphs[i].hash_key.index); + text_info->glyphs[i].symbol = 0; // do not render + continue; + } + // cache + text_info->glyphs[i].hash_key.bitmap = 1; // other hash_key fields were set in get_glyph() + hash_val.bbox_scaled = text_info->glyphs[i].bbox; + hash_val.outline_glyph = text_info->glyphs[i].outline_glyph; + hash_val.glyph = text_info->glyphs[i].glyph; + hash_val.advance.x = text_info->glyphs[i].advance.x; + hash_val.advance.y = text_info->glyphs[i].advance.y; + cache_add_glyph(&(text_info->glyphs[i].hash_key), &hash_val); + } + } + + for (i = 0; i < text_info->length; ++i) { + glyph_info_t* info = text_info->glyphs + i; + if ((info->symbol == 0) || (info->symbol == '\n')) + continue; + + pen_x = dst_x + info->pos.x; + pen_y = dst_y + info->pos.y; + image = info->outline_glyph; + bit = (FT_BitmapGlyph)image; + + if ((info->effect_type == EF_KARAOKE_KO) && (info->effect_timing <= info->bbox.xMax)) { + // do nothing + } else + render_glyph(bit, pen_x, pen_y, info->c3, 0, 1000000); + } + for (i = 0; i < text_info->length; ++i) { + glyph_info_t* info = text_info->glyphs + i; + if ((info->symbol == 0) || (info->symbol == '\n')) + continue; + + pen_x = dst_x + info->pos.x; + pen_y = dst_y + info->pos.y; + image = info->glyph; + bit = (FT_BitmapGlyph)image; + + if ((info->effect_type == EF_KARAOKE) || (info->effect_type == EF_KARAOKE_KO)) { + if (info->effect_timing > info->bbox.xMax) + render_glyph(bit, pen_x, pen_y, info->c1, 0, 1000000); + else + render_glyph(bit, pen_x, pen_y, info->c2, 0, 1000000); + } else if (info->effect_type == EF_KARAOKE_KF) { + render_glyph(bit, pen_x, pen_y, info->c1, info->c2, info->effect_timing); + } else + render_glyph(bit, pen_x, pen_y, info->c1, 0, 1000000); + } + + return 0; +} + +/** + * \brief Mapping between script and screen coordinates + */ +static int x2scr(int x) { + return x*frame_context.width / frame_context.track->PlayResX; +} +/** + * \brief Mapping between script and screen coordinates + */ +static int y2scr(int y) { + return y * frame_context.orig_height / frame_context.track->PlayResY + global_settings->top_margin; +} +// the same for toptitles +static int y2scr_top(int y) { + return y * frame_context.orig_height / frame_context.track->PlayResY; +} +// the same for subtitles +static int y2scr_sub(int y) { + return y * frame_context.orig_height / frame_context.track->PlayResY + global_settings->top_margin + global_settings->bottom_margin; +} + +static void vmirror_bbox(FT_BBox* orig, FT_BBox* pbbox) { + pbbox->xMin = orig->xMin; + pbbox->xMax = orig->xMax; + pbbox->yMin = - orig->yMax; + pbbox->yMax = - orig->yMin; +} + +static void compute_string_bbox( text_info_t* info, FT_BBox *abbox ) { + FT_BBox bbox; + int n; + + /* initialize string bbox to "empty" values */ + bbox.xMin = bbox.yMin = 32000; + bbox.xMax = bbox.yMax = -32000; + + /* for each glyph image, compute its bounding box, */ + /* translate it, and grow the string bbox */ + for ( n = 0; n < info->length; n++ ) { + FT_BBox glyph_bbox; + vmirror_bbox( &(info->glyphs[n].bbox), &glyph_bbox ); + glyph_bbox.xMin += info->glyphs[n].pos.x; + glyph_bbox.xMax += info->glyphs[n].pos.x; + glyph_bbox.yMin += info->glyphs[n].pos.y; + glyph_bbox.yMax += info->glyphs[n].pos.y; + if ( glyph_bbox.xMin < bbox.xMin ) bbox.xMin = glyph_bbox.xMin; + if ( glyph_bbox.yMin < bbox.yMin ) bbox.yMin = glyph_bbox.yMin; + if ( glyph_bbox.xMax > bbox.xMax ) bbox.xMax = glyph_bbox.xMax; + if ( glyph_bbox.yMax > bbox.yMax ) bbox.yMax = glyph_bbox.yMax; + } + + /* check that we really grew the string bbox */ + if ( bbox.xMin > bbox.xMax ) { + bbox.xMin = 0; + bbox.yMin = 0; + bbox.xMax = 0; + bbox.yMax = 0; + } + + /* return string bbox */ + *abbox = bbox; +} + + +/** + * \brief Check if starting part of (*p) matches sample. If true, shift p to the first symbol after the matching part. + */ +static inline int mystrcmp(char** p, char* sample) { + int len = strlen(sample); + if (strncmp(*p, sample, len) == 0) { + (*p) += len; + return 1; + } else + return 0; +} + +static void change_font_size(int sz) +{ + double size = (double)sz * global_settings->font_size_coeff * 0.8; + size *= frame_context.height; + size /= frame_context.track->PlayResY; + + if (size < 1) + size = 1; + else if (size > frame_context.height * 2) + size = frame_context.height * 2; + + FT_Set_Pixel_Sizes(render_context.face, 0, size); + + render_context.font_size = sz; +} + +/** + * \brief Change current font, using setting from render_context. + */ +static void update_font(void) +{ + int error; + unsigned val; + ass_instance_t* priv = frame_context.ass_priv; + face_desc_t desc; + desc.family = strdup(render_context.family); + + val = render_context.bold; + // 0 = normal, 1 = bold, >1 = exact weight + if (val == 0) val = 80; // normal + else if (val == 1) val = 200; // bold + desc.bold = val; + + val = render_context.italic; + if (val == 0) val = 0; // normal + else if (val == 1) val = 110; //italic + desc.italic = val; + + error = ass_new_face(priv->library, priv->fontconfig_priv, &desc, &(render_context.face)); + if (error) { + render_context.face = 0; + } + + if (render_context.face) + { + change_font_size(render_context.font_size); + } +} + +/** + * \brief Change border width + */ +static void change_border(double border) +{ + if (!render_context.stroker) { + if (!no_more_font_messages) + mp_msg(MSGT_GLOBAL, MSGL_WARN, "No stroker!\n"); + } else { + render_context.border = border; + FT_Stroker_Set( render_context.stroker, + (int)(64 * border), + FT_STROKER_LINECAP_ROUND, + FT_STROKER_LINEJOIN_ROUND, + 0 ); + } +} + +#define _r(c) ((c)>>24) +#define _g(c) (((c)>>16)&0xFF) +#define _b(c) (((c)>>8)&0xFF) +#define _a(c) ((c)&0xFF) + +/** + * \brief Calculate a weighted average of two colors + * calculates c1*(1-a) + c2*a, but separately for each component except alpha + */ +static void change_color(uint32_t* var, uint32_t new, double pwr) +{ + (*var)= ((uint32_t)(_r(*var) * (1 - pwr) + _r(new) * pwr) << 24) + + ((uint32_t)(_g(*var) * (1 - pwr) + _g(new) * pwr) << 16) + + ((uint32_t)(_b(*var) * (1 - pwr) + _b(new) * pwr) << 8) + + _a(*var); +} + +// like change_color, but for alpha component only +static void change_alpha(uint32_t* var, uint32_t new, double pwr) +{ + *var = (_r(*var) << 24) + (_g(*var) << 16) + (_b(*var) << 8) + (_a(*var) * (1 - pwr) + _a(new) * pwr); +} + + +/** + * \brief Calculate alpha value by piecewise linear function + * Used for \fad, \fade implementation. + */ +static void interpolate_alpha(long long now, + long long t1, long long t2, long long t3, long long t4, + unsigned a1, unsigned a2, unsigned a3) +{ + unsigned a; + double cf; + if (now <= t1) { + a = a1; + } else if (now >= t4) { + a = a3; + } else if (now < t2) { // and > t1 + cf = ((double)(now - t1)) / (t2 - t1); + a = a1 * (1 - cf) + a2 * cf; + } else if (now > t3) { + cf = ((double)(now - t3)) / (t4 - t3); + a = a2 * (1 - cf) + a3 * cf; + } else { // t2 <= now <= t3 + a = a2; + } + + + change_alpha(&render_context.c1, a, 1.); + change_alpha(&render_context.c2, a, 1.); + change_alpha(&render_context.c3, a, 1.); + change_alpha(&render_context.c4, a, 1.); +} + +/** + * \brief Parse style override tag. + * \param p string to parse + * \param pwr multiplier for some tag effects (comes from \t tags) + */ +static char* parse_tag(char* p, double pwr) { +#define skip_all(x) if (*p == (x)) ++p; else { \ + while ((*p != (x)) && (*p != '}') && (*p != 0)) {++p;} } +#define skip(x) if (*p == (x)) ++p; else { return p; } + + skip_all('\\'); + if ((*p == '}') || (*p == 0)) + return p; + + if (mystrcmp(&p, "fsc")) { + char tp = *p++; + double val; + if (tp == 'x') { + if (mystrtod(&p, &val)) { + val /= 100; + render_context.scale_x = (val - 1.) * pwr + 1.; + } else + render_context.scale_x = render_context.style->ScaleX; + } else if (tp == 'y') { + if (mystrtod(&p, &val)) { + val /= 100; + render_context.scale_y = (val - 1.) * pwr + 1.; + } else + render_context.scale_y = render_context.style->ScaleY; + } + } else if (mystrcmp(&p, "fsp")) { + int val; + if (mystrtoi(&p, 10, &val)) + render_context.hspacing = val * pwr; + else + render_context.hspacing = 0; + } else if (mystrcmp(&p, "fs")) { + int val; + if (mystrtoi(&p, 10, &val)) + val = render_context.font_size * ( 1 - pwr ) + val * pwr; + else + val = render_context.style->FontSize; + if (render_context.face) + change_font_size(val); + } else if (mystrcmp(&p, "bord")) { + double val; + if (mystrtod(&p, &val)) + val = render_context.border * ( 1 - pwr ) + val * pwr; + else + val = (render_context.style->BorderStyle == 1) ? render_context.style->Outline : 1.; + change_border(val); + } else if (mystrcmp(&p, "move")) { + int x1, x2, y1, y2; + long long t1, delta_t, t; + int x, y; + double k; + skip('('); + x1 = strtol(p, &p, 10); + skip(','); + y1 = strtol(p, &p, 10); + skip(','); + x2 = strtol(p, &p, 10); + skip(','); + y2 = strtol(p, &p, 10); + skip(')'); // FIXME: 2 more optional args + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "movement: (%d, %d) -> (%d, %d)\n", x1, y1, x2, y2); + t1 = render_context.event->Start; + delta_t = render_context.event->Duration; + t = frame_context.time; // FIXME: move to render_context + k = ((double)(t - t1)) / delta_t; + x = k * (x2 - x1) + x1; + y = k * (y2 - y1) + y1; + render_context.pos_x = x; + render_context.pos_y = y; + render_context.detect_collisions = 0; + render_context.evt_type = EVENT_POSITIONED; + } else if (mystrcmp(&p, "frx") || mystrcmp(&p, "fry")) { + int val; + mystrtoi(&p, 10, &val); + mp_msg(MSGT_GLOBAL, MSGL_V, "frx/fry unimplemented \n"); + } else if (mystrcmp(&p, "frz") || mystrcmp(&p, "fr")) { + double angle; + int val; + val = strtol(p, &p, 10); + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "setting rotation to %.2f\n", val * pwr); + angle = M_PI * val / 180; + render_context.rotation = angle * pwr; + } else if (mystrcmp(&p, "fn")) { + char* start = p; + char* family; + skip_all('\\'); + family = malloc(p - start + 1); + strncpy(family, start, p - start); + family[p - start] = '\0'; + if (render_context.family) + free(render_context.family); + render_context.family = family; + update_font(); + } else if (mystrcmp(&p, "alpha")) { + uint32_t val; + if (strtocolor(&p, &val)) { + unsigned char a = val >> 24; + change_alpha(&render_context.c1, a, pwr); + change_alpha(&render_context.c2, a, pwr); + change_alpha(&render_context.c3, a, pwr); + change_alpha(&render_context.c4, a, pwr); + } else { + change_alpha(&render_context.c1, render_context.style->PrimaryColour, pwr); + change_alpha(&render_context.c2, render_context.style->SecondaryColour, pwr); + change_alpha(&render_context.c3, render_context.style->OutlineColour, pwr); + change_alpha(&render_context.c4, render_context.style->BackColour, pwr); + } + // FIXME: simplify + } else if (mystrcmp(&p, "an")) { + int val = strtol(p, &p, 10); + int v = (val - 1) / 3; // 0, 1 or 2 for vertical alignment + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "an %d\n", val); + if (v != 0) v = 3 - v; + val = ((val - 1) % 3) + 1; // horizontal alignment + val += v*4; + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "align %d\n", val); + render_context.alignment = val; + } else if (mystrcmp(&p, "a")) { + int val = strtol(p, &p, 10); + render_context.alignment = val; + } else if (mystrcmp(&p, "pos")) { + int v1, v2; + skip('('); + v1 = strtol(p, &p, 10); + skip(','); + v2 = strtol(p, &p, 10); + skip(')'); + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "pos(%d, %d)\n", v1, v2); + render_context.evt_type = EVENT_POSITIONED; + render_context.detect_collisions = 0; + render_context.pos_x = v1; + render_context.pos_y = v2; + } else if (mystrcmp(&p, "fade")) { + int a1, a2, a3, v1, v2, v3, v4; + skip('('); + a1 = strtol(p, &p, 10); + skip(','); + a2 = strtol(p, &p, 10); + skip(','); + a3 = strtol(p, &p, 10); + skip(','); + v1 = strtol(p, &p, 10); + skip(','); + v2 = strtol(p, &p, 10); + skip(','); + v3 = strtol(p, &p, 10); + skip(','); + v4 = strtol(p, &p, 10); + skip(')'); + interpolate_alpha(frame_context.time - render_context.event->Start, v1, v2, v3, v4, a1, a2, a3); + } else if (mystrcmp(&p, "fad")) { + int v1, v2; + long long now, t1, t2, t3, t4; + skip('('); + v1 = strtol(p, &p, 10); + skip(','); + v2 = strtol(p, &p, 10); + skip(')'); + now = frame_context.time; + t1 = render_context.event->Start; + t2 = t1 + v1; + t4 = render_context.event->Start + render_context.event->Duration; + t3 = t4 - v2; + interpolate_alpha(now, t1, t2, t3, t4, 0xFF, 0, 0xFF); + } else if (mystrcmp(&p, "org")) { + int v1, v2; + skip('('); + v1 = strtol(p, &p, 10); + skip(','); + v2 = strtol(p, &p, 10); + skip(')'); + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "org(%d, %d)\n", v1, v2); + // render_context.evt_type = EVENT_POSITIONED; + render_context.org_x = v1; + render_context.org_y = v2; + } else if (mystrcmp(&p, "t")) { + double v[3]; + int v1, v2; + double v3; + int cnt; + long long t1, t2, t, delta_t; + double k; + skip('('); + for (cnt = 0; cnt < 3; ++cnt) { + if (*p == '\\') + break; + v[cnt] = strtod(p, &p); + skip(','); + } + if (cnt == 3) { + v1 = v[0]; v2 = v[1]; v3 = v[2]; + } else if (cnt == 2) { + v1 = v[0]; v2 = v[1]; v3 = 1.; + } else if (cnt == 1) { + v1 = 0; v2 = render_context.event->Duration; v3 = v[0]; + } else { // cnt == 0 + v1 = 0; v2 = render_context.event->Duration; v3 = 1.; + } + render_context.detect_collisions = 0; + t1 = v1; + t2 = v2; + delta_t = v2 - v1; + t = frame_context.time - render_context.event->Start; // FIXME: move to render_context + if (t < t1) + k = 0.; + else if (t > t2) + k = 1.; + else k = ((double)(t - t1)) / delta_t; + while (*p == '\\') + p = parse_tag(p, k); // maybe k*pwr ? no, specs forbid nested \t's + skip_all(')'); // FIXME: better skip(')'), but much more tags support required + } else if (mystrcmp(&p, "clip")) { + int x0, y0, x1, y1; + int res = 1; + skip('('); + res &= mystrtoi(&p, 10, &x0); + skip(','); + res &= mystrtoi(&p, 10, &y0); + skip(','); + res &= mystrtoi(&p, 10, &x1); + skip(','); + res &= mystrtoi(&p, 10, &y1); + skip(')'); + if (res) { + render_context.clip_x0 = render_context.clip_x0 * (1-pwr) + x0 * pwr; + render_context.clip_x1 = render_context.clip_x1 * (1-pwr) + x1 * pwr; + render_context.clip_y0 = render_context.clip_y0 * (1-pwr) + y0 * pwr; + render_context.clip_y1 = render_context.clip_y1 * (1-pwr) + y1 * pwr; + } else { + render_context.clip_x0 = 0; + render_context.clip_y0 = 0; + render_context.clip_x1 = frame_context.track->PlayResX; + render_context.clip_y1 = frame_context.track->PlayResY; + } + } else if (mystrcmp(&p, "c")) { + uint32_t val; + if (!strtocolor(&p, &val)) + val = render_context.style->PrimaryColour; + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "color: %X\n", val); + change_color(&render_context.c1, val, pwr); + } else if ((*p >= '1') && (*p <= '4') && (++p) && (mystrcmp(&p, "c") || mystrcmp(&p, "a"))) { + char n = *(p-2); + char cmd = *(p-1); + uint32_t* pcolor; + uint32_t val; + assert((n >= '1') && (n <= '4')); + if (!strtocolor(&p, &val)) + switch(n) { + case '1': val = render_context.style->PrimaryColour; break; + case '2': val = render_context.style->SecondaryColour; break; + case '3': val = render_context.style->OutlineColour; break; + case '4': val = render_context.style->BackColour; break; + default : val = 0; break; // impossible due to assert; avoid compilation warning + } + switch (n) { + case '1': pcolor = &render_context.c1; break; + case '2': pcolor = &render_context.c2; break; + case '3': pcolor = &render_context.c3; break; + case '4': pcolor = &render_context.c4; break; + default : pcolor = 0; break; + } + switch (cmd) { + case 'c': change_color(pcolor, val, pwr); break; + case 'a': change_alpha(pcolor, val >> 24, pwr); break; + default: mp_msg(MSGT_GLOBAL, MSGL_WARN, "Bad command: %c%c\n", n, cmd); break; + } + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "single c/a at %f: %c%c = %X \n", pwr, n, cmd, *pcolor); + } else if (mystrcmp(&p, "r")) { + render_context.c1 = render_context.style->PrimaryColour; + render_context.c2 = render_context.style->SecondaryColour; + render_context.c3 = render_context.style->OutlineColour; + render_context.c4 = render_context.style->BackColour; + render_context.font_size = render_context.style->FontSize; + + if (render_context.family) + free(render_context.family); + render_context.family = strdup(render_context.style->FontName); + render_context.bold = - render_context.style->Bold; + render_context.italic = - render_context.style->Italic; + update_font(); + + if (render_context.stroker) { + double border = (render_context.style->BorderStyle == 1) ? render_context.style->Outline : 1.; + change_border(border); + } + render_context.scale_x = render_context.style->ScaleX; + render_context.scale_y = render_context.style->ScaleY; + render_context.hspacing = 0; // FIXME + + // FIXME: does not reset unsupported attributes. + } else if (mystrcmp(&p, "be")) { + int val; + mystrtoi(&p, 10, &val); + mp_msg(MSGT_GLOBAL, MSGL_V, "be unimplemented \n"); + } else if (mystrcmp(&p, "b")) { + int b; + if (mystrtoi(&p, 10, &b)) + render_context.bold = b; + else + render_context.bold = - render_context.style->Bold; + update_font(); + } else if (mystrcmp(&p, "i")) { + int i; + if (mystrtoi(&p, 10, &i)) + render_context.italic = i; + else + render_context.italic = - render_context.style->Italic; + update_font(); + } else if (mystrcmp(&p, "kf") || mystrcmp(&p, "K")) { + int val = strtol(p, &p, 10); + render_context.effect_type = EF_KARAOKE_KF; + render_context.effect_timing = val * 10; + } else if (mystrcmp(&p, "ko")) { + int val = strtol(p, &p, 10); + render_context.effect_type = EF_KARAOKE_KO; + render_context.effect_timing = val * 10; + } else if (mystrcmp(&p, "k")) { + int val = strtol(p, &p, 10); + render_context.effect_type = EF_KARAOKE; + render_context.effect_timing = val * 10; + } + + return p; + +#undef skip +#undef skip_all +} + +/** + * \brief Get next ucs4 char from string, parsing and executing style overrides + * \param str string pointer + * \return ucs4 code of the next char + * On return str points to the unparsed part of the string + */ +static unsigned get_next_char(char** str) +{ + char* p = *str; + unsigned chr; + if (*p == '{') { // '\0' goes here + p++; + while (1) { + p = parse_tag(p, 1.); + if (*p == '}') { // end of tag + p++; + if (*p == '{') { + p++; + continue; + } else + break; + } else if (*p != '\\') + mp_msg(MSGT_GLOBAL, MSGL_V, "Unable to parse: \"%s\" \n", p); + if (*p == 0) + break; + } + } + if (*p == '\t') { + ++p; + *str = p; + return ' '; + } + if (*p == '\\') { + if ((*(p+1) == 'N') || ((*(p+1) == 'n') && (frame_context.track->WrapStyle == 2))) { + p += 2; + *str = p; + return '\n'; + } else if (*(p+1) == 'n') { + p += 2; + *str = p; + return ' '; + } + } + chr = utf8_get_char(&p); + *str = p; + return chr; +} + +/** + * \brief Start new event. Reset render_context. + */ +static int init_render_context(ass_event_t* event) +{ + int error; + +// init render_context + render_context.event = event; + render_context.style = frame_context.track->styles + event->Style; + + render_context.font_size = render_context.style->FontSize; + render_context.evt_type = EVENT_NORMAL; + render_context.alignment = 0; + render_context.rotation = 0.; + render_context.pos_x = 0; + render_context.pos_y = 0; + render_context.org_x = 0; + render_context.org_y = 0; + render_context.scale_x = render_context.style->ScaleX; + render_context.scale_y = render_context.style->ScaleY; + render_context.hspacing = 0; + render_context.c1 = render_context.style->PrimaryColour; + render_context.c2 = render_context.style->SecondaryColour; + render_context.c3 = render_context.style->OutlineColour; + render_context.c4 = render_context.style->BackColour; + render_context.clip_x0 = 0; + render_context.clip_y0 = 0; + render_context.clip_x1 = frame_context.track->PlayResX; + render_context.clip_y1 = frame_context.track->PlayResY; + render_context.detect_collisions = 1; + + if (render_context.family) + free(render_context.family); + render_context.family = strdup(render_context.style->FontName); + render_context.bold = - render_context.style->Bold; // style value for bold text is -1 + render_context.italic = - render_context.style->Italic; + + update_font(); + + if (render_context.face) { +#if (FREETYPE_MAJOR > 2) || ((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR > 1)) + error = FT_Stroker_New( ass_instance->library, &render_context.stroker ); +#else // < 2.2 + error = FT_Stroker_New( render_context.face->memory, &render_context.stroker ); +#endif + if ( error ) { + mp_msg(MSGT_GLOBAL, MSGL_V, "failed to get stroker\n"); + render_context.stroker = 0; + } else { + // FIXME: probably wrong when render_context.Border == 3 + double border = (render_context.style->BorderStyle == 1) ? render_context.style->Outline : 1.; + change_border(border); + } + } + + return 0; +} + +static int free_render_context(void) +{ + if (render_context.stroker != 0) { + FT_Stroker_Done(render_context.stroker); + render_context.stroker = 0; + } + return 0; +} + +/** + * \brief Get normal and outline glyphs from cache (if possible) or font face + * \param index face glyph index + * \param symbol ucs4 char + * \param info out: struct filled with extracted data + * \param advance advance vector of the extracted glyph + * \return 0 on success + */ +static int get_glyph(int index, int symbol, glyph_info_t* info, FT_Vector* advance) +{ + int error; + glyph_hash_val_t* val; + glyph_hash_key_t* key = &(info->hash_key); + + key->face = render_context.face; + key->size = render_context.font_size; + key->index = index; + key->outline = (render_context.border * 0xFFFF); // convert to 16.16 + key->scale_x = (render_context.scale_x * 0xFFFF); + key->scale_y = (render_context.scale_y * 0xFFFF); + key->angle = (render_context.rotation * 0xFFFF); + key->advance = *advance; + key->bold = render_context.bold; + key->italic = render_context.italic; + + key->bitmap = 1; // looking for bitmap glyph + + + val = cache_find_glyph(key); +// val = 0; + + if (val) { + // bitmap glyph found, no need for FT_Glyph_Copy + info->glyph = val->glyph; + info->outline_glyph = val->outline_glyph; + info->bbox = val->bbox_scaled; + info->advance.x = val->advance.x; + info->advance.y = val->advance.y; + info->bitmap = 1; // bitmap glyph + + return 0; + } + + // not found, get a new outline glyph from face +// mp_msg(MSGT_GLOBAL, MSGL_INFO, "miss, index = %d, symbol = %c, adv = (%d, %d)\n", index, symbol, advance->x, advance->y); + + error = FT_Load_Glyph(render_context.face, index, FT_LOAD_NO_BITMAP ); + if (error) { + mp_msg(MSGT_GLOBAL, MSGL_WARN, "Error loading glyph\n"); + return error; + } + +#if (FREETYPE_MAJOR > 2) || \ + ((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR >= 2)) || \ + ((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR == 1) && (FREETYPE_PATCH >= 10)) +// FreeType >= 2.1.10 required + if (!(render_context.face->style_flags & FT_STYLE_FLAG_ITALIC) && + ((render_context.italic == 1) || (render_context.italic > 55))) { + FT_GlyphSlot_Oblique(render_context.face->glyph); + } +#endif + error = FT_Get_Glyph(render_context.face->glyph, &(info->glyph)); + if (error) { + mp_msg(MSGT_GLOBAL, MSGL_WARN, "Error getting glyph\n"); + return error; + } + + info->advance.x = info->glyph->advance.x >> 10; + info->advance.y = info->glyph->advance.y >> 10; + + info->outline_glyph = info->glyph; + FT_Glyph_Stroke( &(info->outline_glyph), render_context.stroker, 0 ); // don't destroy original + + info->bitmap = 0; // outline glyph + + return 0; +} + +/** + * \brief rearrange text between lines + * \param max_text_width maximal text line width in pixels + * The algo is similar to the one in libvo/sub.c: + * 1. Place text, wrapping it when current line is full + * 2. Try moving words from the end of a line to the beginning of the next one while it reduces + * the difference in lengths between this two lines. + * The result may not be optimal, but usually is good enough. + */ +static void wrap_lines_smart(int max_text_width) +{ + int i, j; + glyph_info_t *cur, *s1, *e1, *s2, *s3, *w; + int last_space; + int break_type; + int exit; + int pen_shift_x; + int pen_shift_y; + int max_asc, max_desc; + int cur_line; + + last_space = -1; + text_info.n_lines = 1; + break_type = 0; + s1 = text_info.glyphs; // current line start + for (i = 0; i < text_info.length; ++i) { + cur = text_info.glyphs + i; + int break_at = -1; + int s_offset = s1->bbox.xMin + s1->pos.x; + int len = (cur->bbox.xMax + cur->pos.x) - s_offset; + + if (cur->symbol == '\n') { + break_type = 2; + break_at = i; + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "forced line break at %d\n", break_at); + } + + if (len >= max_text_width) { + break_type = 1; + break_at = last_space; + if (break_at == -1) + break_at = i - 1; + if (break_at == -1) + break_at = 0; + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "overfill at %d\n", i); + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "line break at %d\n", break_at); + } + + if (break_at != -1) { + // need to use one more line + // marking break_at+1 as start of a new line + int lead = break_at + 1; // the first symbol of the new line + if (text_info.n_lines >= MAX_LINES) { + // to many lines ! + // no more linebreaks + for (j = lead; j < text_info.length; ++j) + text_info.glyphs[j].linebreak = 0; + break; + } + if (lead < text_info.length) + text_info.glyphs[lead].linebreak = break_type; + last_space = -1; + s1 = text_info.glyphs + lead; + s_offset = s1->bbox.xMin + s1->pos.x; + text_info.n_lines ++; + } + + if (cur->symbol == ' ') + last_space = i; + } +#define DIFF(x,y) (((x) < (y)) ? (y - x) : (x - y)) + exit = 0; + while (!exit) { + exit = 1; + w = s3 = text_info.glyphs; + s1 = s2 = 0; + for (i = 0; i <= text_info.length; ++i) { + cur = text_info.glyphs + i; + if ((i == text_info.length) || cur->linebreak) { + s1 = s2; + s2 = s3; + s3 = cur; +// printf("line: %d, %d, %d \n", s1 - text_info.glyphs, s2 - text_info.glyphs, s3 - text_info.glyphs); + if (s1 && (s2->linebreak == 1)) { // have at least 2 lines, and linebreak is 'soft' + int l1, l2, l1_new, l2_new; + + w = s2; + do { --w; } while ((w > s1) && (w->symbol == ' ')); + do { --w; } while ((w > s1) && (w->symbol != ' ')); + e1 = w; + do { --e1; } while ((e1 > s1) && (e1->symbol == ' ')); + if (w->symbol == ' ') ++w; + +// printf("check: %d, %d, %d, w: %d, e: %d \n", s1 - text_info.glyphs, s2 - text_info.glyphs, s3 - text_info.glyphs, +// w - text_info.glyphs, e1 - text_info.glyphs); + + l1 = ((s2-1)->bbox.xMax + (s2-1)->pos.x) - (s1->bbox.xMin + s1->pos.x); + l2 = ((s3-1)->bbox.xMax + (s3-1)->pos.x) - (s2->bbox.xMin + s2->pos.x); + l1_new = (e1->bbox.xMax + e1->pos.x) - (s1->bbox.xMin + s1->pos.x); + l2_new = ((s3-1)->bbox.xMax + (s3-1)->pos.x) - (w->bbox.xMin + w->pos.x); + + if (DIFF(l1_new, l2_new) < DIFF(l1, l2)) { + w->linebreak = 1; + s2->linebreak = 0; + exit = 0; + } + } + } + if (i == text_info.length) + break; + } + + } + assert(text_info.n_lines >= 1); +#undef DIFF + + text_info.height = 0; + max_asc = max_desc = 0; + cur_line = 0; + for (i = 0; i < text_info.length + 1; ++i) { + if ((i == text_info.length) || text_info.glyphs[i].linebreak) { + text_info.lines[cur_line].asc = max_asc; + text_info.lines[cur_line].desc = max_desc; + text_info.height += max_asc + max_desc; + cur_line ++; + max_asc = max_desc = 0; + } + if (i < text_info.length) { + cur = text_info.glyphs + i; + if (cur->asc > max_asc) + max_asc = cur->asc * render_context.scale_y; + if (cur->desc > max_desc) + max_desc = cur->desc * render_context.scale_y; + } + } + + pen_shift_x = 0; + pen_shift_y = 0; + cur_line = 1; + for (i = 0; i < text_info.length; ++i) { + cur = text_info.glyphs + i; + if (cur->linebreak) { + int height = text_info.lines[cur_line - 1].desc + text_info.lines[cur_line].asc; + cur_line ++; + pen_shift_x = - cur->pos.x; + pen_shift_y += (height >> 6) + global_settings->line_spacing; + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "shifting from %d to %d by (%d, %d)\n", i, text_info.length - 1, pen_shift_x, pen_shift_y); + } + cur->pos.x += pen_shift_x; + cur->pos.y += pen_shift_y; + } +// printf("============= \n"); +} + +/** + * \brief determine karaoke effects + * Karaoke effects cannot be calculated during parse stage (get_next_char()), + * so they are done in a separate step. + * Parse stage: when karaoke style override is found, its parameters are stored in the next glyph's + * (the first glyph of the karaoke word)'s effect_type and effect_timing. + * This function: + * 1. sets effect_type for all glyphs in the word (_karaoke_ word) + * 2. sets effect_timing for all glyphs to x coordinate of the border line between the left and right karaoke parts + * (left part is filled with PrimaryColour, right one - with SecondaryColour). + */ +static void process_karaoke_effects(void) +{ + glyph_info_t *cur, *cur2; + glyph_info_t *s1, *e1; // start and end of the current word + glyph_info_t *s2; // start of the next word + int i; + int timing; // current timing + int tm_start, tm_end; // timings at start and end of the current word + int tm_current; + double dt; + int x; + int x_start, x_end; + + tm_current = frame_context.time - render_context.event->Start; + timing = 0; + s1 = s2 = 0; + for (i = 0; i <= text_info.length; ++i) { + cur = text_info.glyphs + i; + if ((i == text_info.length) || (cur->effect_type != EF_NONE)) { + s1 = s2; + s2 = cur; + if (s1) { + e1 = s2 - 1; + tm_start = timing; + tm_end = timing + s1->effect_timing; + timing = tm_end; + x_start = s1->bbox.xMin + s1->pos.x; + x_end = e1->bbox.xMax + e1->pos.x; + + dt = (tm_current - tm_start); + if ((s1->effect_type == EF_KARAOKE) || (s1->effect_type == EF_KARAOKE_KO)) { + if (dt > 0) + x = x_end + 1; + else + x = x_start; + } else if (s1->effect_type == EF_KARAOKE_KF) { + dt /= (tm_end - tm_start); + x = x_start + (x_end - x_start) * dt; + } else { + mp_msg(MSGT_GLOBAL, MSGL_ERR, "Unknown effect type (internal error) \n"); + continue; + } + + for (cur2 = s1; cur2 <= e1; ++cur2) { + cur2->effect_type = s1->effect_type; + cur2->effect_timing = x - cur2->pos.x; + } + } + } + } +} + +int get_face_ascender(FT_Face face) +{ + int v = face->size->metrics.ascender; + if (!v) + v = FT_MulFix(face->bbox.yMax, face->size->metrics.y_scale); + return v; +} + +int get_face_descender(FT_Face face) +{ + int v = face->size->metrics.descender; + if (!v) + v = FT_MulFix(face->bbox.yMin, face->size->metrics.y_scale); + return -v; +} + +/** + * \brief Main ass rendering function, glues everything together + * \param event event to render + * Process event, appending resulting ass_image_t's to images_root. + */ +int ass_render_event(ass_event_t* event) +{ + char* p; + FT_UInt glyph_index; + FT_Bool use_kerning; + FT_UInt previous; + FT_UInt num_glyphs; + FT_Vector pen; + int error; + unsigned code; + FT_BBox bbox; + int i, j; + FT_Vector shift; + int MarginL, MarginR, MarginV; + int max_text_width; + ass_style_t* style = frame_context.track->styles + event->Style; + int last_break; + int alignment, halign, valign; + int device_x, device_y; + + init_render_context(event); + + text_info.length = 0; + pen.x = 0; + pen.y = 0; + previous = 0; + num_glyphs = 0; + + + p = event->Text; + if (!p) { + mp_msg(MSGT_GLOBAL, MSGL_WARN, "Empty event!\n"); + return 0; + } + + // Event parsing. + while (1) { + render_context.effect_type = EF_NONE; + + // get next char, executing style override + // this affects render_context + code = get_next_char(&p); + + // face could have been changed in get_next_char + if (!render_context.face) { + free_render_context(); + return 0; + } + + if (code == 0) + break; + + use_kerning = FT_HAS_KERNING(render_context.face); + + if (text_info.length >= MAX_GLYPHS) { + mp_msg(MSGT_GLOBAL, MSGL_WARN, "\nMAX_GLYPHS reached: event %d, start = %llu, duration = %llu\n Text = %s\n", + (int)(event - frame_context.track->events), event->Start, event->Duration, event->Text); + break; + } + + glyph_index = FT_Get_Char_Index( render_context.face, code); + + if ( use_kerning && previous && glyph_index ) { + FT_Vector delta; + FT_Get_Kerning( render_context.face, previous, glyph_index, FT_KERNING_DEFAULT, &delta ); + pen.x += delta.x; + pen.y += delta.y; + } + + shift.x = pen.x & 63; + shift.y = pen.y & 63; + + if ((render_context.scale_x != 1.) || (render_context.scale_y != 1.) || + (frame_context.font_scale_x != 1.)) { + FT_Matrix matrix; + matrix.xx = (FT_Fixed)( render_context.scale_x * frame_context.font_scale_x * 0x10000L ); + matrix.xy = (FT_Fixed)( 0 * 0x10000L ); + matrix.yx = (FT_Fixed)( 0 * 0x10000L ); + matrix.yy = (FT_Fixed)( render_context.scale_y * 0x10000L ); + + FT_Set_Transform( render_context.face, &matrix, &shift ); + } else { + FT_Set_Transform(render_context.face, 0, &shift); + } + + error = get_glyph(glyph_index, code, text_info.glyphs + text_info.length, &shift); + + if (error) { + continue; + } + + text_info.glyphs[text_info.length].pos.x = pen.x >> 6; + text_info.glyphs[text_info.length].pos.y = pen.y >> 6; + + pen.x += text_info.glyphs[text_info.length].advance.x; + pen.x += render_context.hspacing; + pen.y += text_info.glyphs[text_info.length].advance.y; + + // if it's an outline glyph, we still need to fill the bbox + if (text_info.glyphs[text_info.length].bitmap != 1) { + FT_Glyph_Get_CBox( text_info.glyphs[text_info.length].glyph, FT_GLYPH_BBOX_PIXELS, &(text_info.glyphs[text_info.length].bbox) ); + } + + + previous = glyph_index; + + text_info.glyphs[text_info.length].symbol = code; + text_info.glyphs[text_info.length].linebreak = 0; + text_info.glyphs[text_info.length].c1 = render_context.c1; + text_info.glyphs[text_info.length].c2 = render_context.c2; + text_info.glyphs[text_info.length].c3 = render_context.c3; + text_info.glyphs[text_info.length].c4 = render_context.c4; + text_info.glyphs[text_info.length].effect_type = render_context.effect_type; + text_info.glyphs[text_info.length].effect_timing = render_context.effect_timing; + text_info.glyphs[text_info.length].asc = get_face_ascender(render_context.face); + text_info.glyphs[text_info.length].desc = get_face_descender(render_context.face); + + text_info.length++; + } + + if (text_info.length == 0) { + // no valid symbols in the event; this can be smth like {comment} + free_render_context(); + return 0; + } + + // depends on glyph x coordinates being monotonous, so it should be done before line wrap + process_karaoke_effects(); + + // calculate max length of a line + MarginL = (event->MarginL) ? event->MarginL : style->MarginL; + MarginR = (event->MarginR) ? event->MarginR : style->MarginR; + MarginV = (event->MarginV) ? event->MarginV : style->MarginV; + + max_text_width = x2scr(frame_context.track->PlayResX - MarginR) - x2scr(MarginL); + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "normal text width: %d\n", max_text_width); + + // rearrange text in several lines + wrap_lines_smart(max_text_width); + + // alignments + alignment = render_context.alignment; + if (!alignment) + alignment = render_context.style->Alignment; + halign = alignment & 3; + valign = alignment & 12; + + // align text + last_break = -1; + for (i = 1; i < text_info.length + 1; ++i) { // (text_info.length + 1) is the end of the last line + if ((i == text_info.length) || text_info.glyphs[i].linebreak) { + + glyph_info_t* first_glyph = text_info.glyphs + last_break + 1; + glyph_info_t* last_glyph = text_info.glyphs + i - 1; + + while ((last_glyph >= first_glyph) && ((last_glyph->symbol == '\n') || (last_glyph->symbol == 0))) + last_glyph --; + + int width = last_glyph->pos.x + last_glyph->bbox.xMax - first_glyph->pos.x - first_glyph->bbox.xMin; + int shift = - first_glyph->bbox.xMin; // now text line starts exactly at 0 (left margin) + if (halign == HALIGN_LEFT) { // left aligned, no action + } else if (halign == HALIGN_RIGHT) { // right aligned + shift = max_text_width - width; + } else if (halign == HALIGN_CENTER) { // centered + shift = (max_text_width - width) / 2; + } + for (j = last_break + 1; j < i; ++j) { + text_info.glyphs[j].pos.x += shift; + } + last_break = i - 1; + } + } + + // determing text bounding box + compute_string_bbox(&text_info, &bbox); + + // determine device coordinates for text + + // FIXME: using current font descender, ascender and height here is wrong. + // correct way is using max(descender) over all the fonts used in a line + // the same for height and ascender + if (render_context.evt_type == EVENT_NORMAL) { + device_x = x2scr(MarginL); + if (valign == VALIGN_TOP) { // toptitle + device_y = y2scr_top(MarginV) + (text_info.lines[0].asc >> 6); + if (render_context.detect_collisions) { + device_y += frame_context.add_top_margin; + frame_context.add_top_margin += (text_info.height >> 6); + } + } else if (valign == VALIGN_CENTER) { // midtitle + int scr_y = y2scr(frame_context.track->PlayResY / 2); + device_y = scr_y - (bbox.yMax - bbox.yMin) / 2; + } else { // subtitle + int scr_y; + if (valign != VALIGN_SUB) + mp_msg(MSGT_GLOBAL, MSGL_V, "Invalid valign, supposing 0 (subtitle)\n"); + scr_y = y2scr_sub(frame_context.track->PlayResY - MarginV); + device_y = scr_y; + device_y -= (text_info.height >> 6); + device_y += (text_info.lines[0].asc >> 6); + if (render_context.detect_collisions) { + device_y -= frame_context.add_bottom_margin; + frame_context.add_bottom_margin += (text_info.height >> 6); + } + } + } else if (render_context.evt_type == EVENT_POSITIONED) { + int align_shift_x = 0; + int align_shift_y = 0; + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "positioned event at %d, %d\n", render_context.pos_x, render_context.pos_y); + switch(halign) { + case HALIGN_LEFT: + align_shift_x = - bbox.xMin; + break; + case HALIGN_CENTER: + align_shift_x = - (bbox.xMax + bbox.xMin) /2; + break; + case HALIGN_RIGHT: + align_shift_x = - bbox.xMax; + break; + } + switch(valign) { + case VALIGN_TOP: + align_shift_y = - bbox.yMin; + break; + case VALIGN_CENTER: + align_shift_y = - (bbox.yMax + bbox.yMin) /2; + break; + case VALIGN_SUB: + align_shift_y = - bbox.yMax; + break; + } + device_x = x2scr(render_context.pos_x) + align_shift_x; + device_y = y2scr(render_context.pos_y) + align_shift_y; + } else { + mp_msg(MSGT_GLOBAL, MSGL_V, "unknown evt_type\n"); + device_x = 10; + device_y = 10; + } + + // fix clip coordinates (they depend on alignment) + render_context.clip_x0 = x2scr(render_context.clip_x0); + render_context.clip_x1 = x2scr(render_context.clip_x1); + if (render_context.evt_type == EVENT_NORMAL) { + if (valign == VALIGN_TOP) { + render_context.clip_y0 = y2scr_top(render_context.clip_y0); + render_context.clip_y1 = y2scr_top(render_context.clip_y1); + } else if (valign == VALIGN_CENTER) { + render_context.clip_y0 = y2scr(render_context.clip_y0); + render_context.clip_y1 = y2scr(render_context.clip_y1); + } else if (valign == VALIGN_SUB) { + render_context.clip_y0 = y2scr_sub(render_context.clip_y0); + render_context.clip_y1 = y2scr_sub(render_context.clip_y1); + } + } else if (render_context.evt_type == EVENT_POSITIONED) { + render_context.clip_y0 = y2scr(render_context.clip_y0); + render_context.clip_y1 = y2scr(render_context.clip_y1); + } + + // rotate glyphs if needed + if (render_context.rotation != 0.) { + double angle = render_context.rotation; + FT_Vector center; + FT_Matrix matrix_rotate; + + matrix_rotate.xx = (FT_Fixed)( cos( angle ) * 0x10000L ); + matrix_rotate.xy = (FT_Fixed)( -sin( angle ) * 0x10000L ); + matrix_rotate.yx = (FT_Fixed)( sin( angle ) * 0x10000L ); + matrix_rotate.yy = (FT_Fixed)( cos( angle ) * 0x10000L ); + + if (((render_context.org_x != 0) || (render_context.org_y != 0)) && (render_context.evt_type == EVENT_POSITIONED)) { + center.x = render_context.org_x; + center.y = render_context.org_y; + } else { + FT_BBox str_bbox; + + center.x = text_info.glyphs[0].pos.x + device_x; + center.y = text_info.glyphs[0].pos.y + device_y; + + compute_string_bbox(&text_info, &str_bbox); + center.x += (str_bbox.xMax - str_bbox.xMin) / 2; + center.y += (str_bbox.yMax - str_bbox.yMin) / 2; + } +// mp_msg(MSGT_GLOBAL, MSGL_DBG2, "\ncenter: %d, %d\n", center.x, center.y); + + for (i = 0; i < text_info.length; ++i) { + glyph_info_t* info = text_info.glyphs + i; + + // calculating shift vector + // shift = (position - center)*M - (position - center) + FT_Vector start; + FT_Vector start_old; +// mp_msg(MSGT_GLOBAL, MSGL_INFO, "start: (%d, %d) + (%d, %d) - (%d, %d) = (%d, %d)\n", info->pos.x, info->pos.y, device_x, device_y, center.x, center.y, +// info->pos.x + device_x - center.x, info->pos.y + device_y - center.y); + start.x = (info->pos.x + device_x - center.x) << 6; + start.y = - (info->pos.y + device_y - center.y) << 6; + start_old.x = start.x; + start_old.y = start.y; +// mp_msg(MSGT_GLOBAL, MSGL_INFO, "start: %d, %d\n", start.x / 64, start.y / 64); + + FT_Vector_Transform(&start, &matrix_rotate); + + start.x -= start_old.x; + start.y -= start_old.y; + + info->pos.x += start.x >> 6; + info->pos.y -= start.y >> 6; + +// mp_msg(MSGT_GLOBAL, MSGL_DBG2, "shift: %d, %d\n", start.x / 64, start.y / 64); + if (info->bitmap != 1) { + FT_Glyph_Transform( info->glyph, &matrix_rotate, 0 ); + FT_Glyph_Transform( info->outline_glyph, &matrix_rotate, 0 ); + } + } + } + + // render + render_text(&text_info, device_x, device_y); + + free_render_context(); + + return 0; +} + +void ass_configure(ass_instance_t* priv, const ass_settings_t* config) +{ + memcpy(&priv->settings, config, sizeof(ass_settings_t)); +} + +/** + * \brief Start a new frame + */ +int ass_start_frame(ass_instance_t *priv, ass_track_t* track, long long now) +{ + ass_instance = priv; + global_settings = &priv->settings; + + if (!priv->settings.frame_width && !priv->settings.frame_height) + return 1; // library not initialized + + frame_context.ass_priv = priv; + frame_context.width = global_settings->frame_width; + frame_context.height = global_settings->frame_height; + frame_context.orig_height = global_settings->frame_height - global_settings->top_margin - global_settings->bottom_margin; + frame_context.track = track; + frame_context.add_bottom_margin = 0; + frame_context.add_top_margin = 0; + frame_context.time = now; + + ass_lazy_track_init(); + + if (frame_context.width * track->PlayResY == frame_context.height * track->PlayResX) + frame_context.font_scale_x = 1.; + else + frame_context.font_scale_x = ((double)(frame_context.width * track->PlayResY)) / (frame_context.height * track->PlayResX); + + priv->n_images = 0; + + return 0; +} + +/** + * \brief End a frame, give out rendering results + * \return list of ass_image_t + */ +ass_image_t* ass_end_frame(void) +{ + ass_instance_t* priv = ass_instance; + if (priv->n_images) { + int i; + for (i = 0; i < priv->n_images - 1; ++i) + priv->images_root[i].next = priv->images_root + i + 1; + priv->images_root[priv->n_images - 1].next = 0; + return priv->images_root; + } else { + return 0; + } +} +/** + * \brief render a frame + * \param priv library handle + * \param track track + * \param now current video timestamp (ms) + */ +ass_image_t* ass_render_frame(ass_instance_t *priv, ass_track_t* track, long long now) +{ + int i, rc; + + rc = ass_start_frame(priv, track, now); + if (rc != 0) // some error + return 0; + for (i = 0; i < track->n_events; ++i) { + ass_event_t* event = track->events + i; + if ( (event->Start <= now) && (now < (event->Start + event->Duration)) ) { + ass_render_event(event); + } + } + return ass_end_frame(); +} + -- cgit v1.2.3