From 0a6de063b05088c9c9556f0aefd2171906e8baf4 Mon Sep 17 00:00:00 2001 From: Philip Gladstone Date: Sun, 16 Feb 2003 22:49:52 +0000 Subject: Updated with many new features. Originally committed as revision 1587 to svn://svn.ffmpeg.org/ffmpeg/trunk --- vhook/drawtext.c | 287 ++++++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 230 insertions(+), 57 deletions(-) diff --git a/vhook/drawtext.c b/vhook/drawtext.c index 8b3666cb15..df87198757 100644 --- a/vhook/drawtext.c +++ b/vhook/drawtext.c @@ -1,19 +1,29 @@ /* * drawtext.c: print text over the screen - ****************************************************************** + ****************************************************************************** * Options: - * -f font filename - * -s font size in pixels + * -f font filename (MANDATORY!!!) + * -s font size in pixels [default 16] * -b print background * -o outline glyphs (use the bg color) - * -x x position ( > 0) - * -y y position ( > 0) + * -x x position ( >= 0) [default 0] + * -y y position ( >= 0) [default 0] * -t text to print (will be passed to strftime()) - * -c <#RRGGBB> foreground color ('internet' way) - * -C <#RRGGBB> background color ('internet' way) - * - ****************************************************************** + * MANDATORY: will be used even when -T is used. + * in this case, -t will be used if some error + * occurs + * -T file with the text (re-read every frame) + * -c <#RRGGBB> foreground color ('internet' way) [default #ffffff] + * -C <#RRGGBB> background color ('internet' way) [default #000000] * + ****************************************************************************** + * Features: + * - True Type, Type1 and others via FreeType2 library + * - Font kerning (better output) + * - Line Wrap (if the text doesn't fit, the next char go to the next line) + * - Background box + * - Outline + ****************************************************************************** * Author: Gustavo Sverzut Barbieri * * This library is free software; you can redistribute it and/or @@ -30,6 +40,9 @@ * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + +#define MAXSIZE_TEXT 1024 + #include #include #include @@ -43,6 +56,7 @@ #include #include FT_FREETYPE_H +#include FT_GLYPH_H #define RGB_TO_YUV(rgb_color, yuv_color) { \ yuv_color[0] = ( 0.257 * rgb_color[0]) + (0.504 * rgb_color[1]) + (0.098 * rgb_color[2]) + 16; \ @@ -72,15 +86,25 @@ typedef struct { - char *text; + unsigned char *text; + unsigned char *file; unsigned int x; unsigned int y; int bg; int outline; unsigned char bgcolor[3]; /* YUV */ unsigned char fgcolor[3]; /* YUV */ - FT_Library ft_lib; - FT_Face ft_face; + FT_Library library; + FT_Face face; + FT_Glyph glyphs[ 255 ]; + FT_Bitmap bitmaps[ 255 ]; + int advance[ 255 ]; + int bitmap_left[ 255 ]; + int bitmap_top[ 255 ]; + unsigned int glyphs_index[ 255 ]; + int text_height; + int baseline; + int use_kerning; } ContextInfo; @@ -112,8 +136,6 @@ int ParseColor(char *text, unsigned char yuv_color[3]) RGB_TO_YUV(rgb_color, yuv_color); - printf("RGB=%d,%d,%d YUV=%d,%d,%d\n",rgb_color[0],rgb_color[1],rgb_color[2], - yuv_color[0],yuv_color[1],yuv_color[2]); return 0; } @@ -124,12 +146,14 @@ int Configure(void **ctxp, int argc, char *argv[]) ContextInfo *ci=NULL; char *font=NULL; unsigned int size=16; - + FT_BBox bbox; + int yMax, yMin; *ctxp = av_mallocz(sizeof(ContextInfo)); ci = (ContextInfo *) *ctxp; /* configure Context Info */ ci->text = NULL; + ci->file = NULL; ci->x = ci->y = 0; ci->fgcolor[0]=255; ci->fgcolor[1]=128; @@ -139,9 +163,10 @@ int Configure(void **ctxp, int argc, char *argv[]) ci->fgcolor[2]=128; ci->bg = 0; ci->outline = 0; + ci->text_height = 0; optind = 0; - while ((c = getopt(argc, argv, "f:t:x:y:s:c:C:bo")) > 0) { + while ((c = getopt(argc, argv, "f:t:T:x:y:s:c:C:bo")) > 0) { switch (c) { case 'f': font = optarg; @@ -149,6 +174,9 @@ int Configure(void **ctxp, int argc, char *argv[]) case 't': ci->text = av_strdup(optarg); break; + case 'T': + ci->file = av_strdup(optarg); + break; case 'x': ci->x = (unsigned int) atoi(optarg); break; @@ -190,34 +218,87 @@ int Configure(void **ctxp, int argc, char *argv[]) return -1; } + if (ci->file) + { + FILE *fp; + if ((fp=fopen(ci->file, "r")) == NULL) + { + perror("WARNING: the file could not be opened. Using text provided with -t switch. "); + } + else + { + fclose(fp); + } + } + if (!font) { fprintf(stderr,"ERROR: No font file provided! (-f filename)\n"); return -1; } - if ((error = FT_Init_FreeType(&(ci->ft_lib))) != 0) + if ((error = FT_Init_FreeType(&(ci->library))) != 0) { fprintf(stderr,"ERROR: Could not load FreeType (error# %d)\n",error); return -1; } - if ((error = FT_New_Face( ci->ft_lib, font, 0, &(ci->ft_face) )) != 0) + if ((error = FT_New_Face( ci->library, font, 0, &(ci->face) )) != 0) { fprintf(stderr,"ERROR: Could not load face: %s (error# %d)\n",font, error); return -1; } - if ((error = FT_Set_Pixel_Sizes( ci->ft_face, 0, size)) != 0) + if ((error = FT_Set_Pixel_Sizes( ci->face, 0, size)) != 0) { fprintf(stderr,"ERROR: Could not set font size to %d pixels (error# %d)\n",size, error); return -1; } - + + ci->use_kerning = FT_HAS_KERNING(ci->face); + + /* load and cache glyphs */ + yMax = -32000; + yMin = 32000; + for (c=0; c < 256; c++) + { + /* Load char */ + error = FT_Load_Char( ci->face, (unsigned char) c, FT_LOAD_RENDER | FT_LOAD_MONOCHROME ); + if (error) continue; /* ignore errors */ + + /* Save bitmap */ + ci->bitmaps[c] = ci->face->glyph->bitmap; + /* Save bitmap left */ + ci->bitmap_left[c] = ci->face->glyph->bitmap_left; + /* Save bitmap top */ + ci->bitmap_top[c] = ci->face->glyph->bitmap_top; + + /* Save advance */ + ci->advance[c] = ci->face->glyph->advance.x >> 6; + + /* Save glyph */ + error = FT_Get_Glyph( ci->face->glyph, &(ci->glyphs[c]) ); + /* Save glyph index */ + ci->glyphs_index[c] = FT_Get_Char_Index( ci->face, (unsigned char) c ); + + /* Measure text height to calculate text_height (or the maximum text height) */ + FT_Glyph_Get_CBox( ci->glyphs[ c ], ft_glyph_bbox_pixels, &bbox ); + if (bbox.yMax > yMax) + yMax = bbox.yMax; + if (bbox.yMin < yMin) + yMin = bbox.yMin; + + } + + ci->text_height = yMax - yMin; + ci->baseline = yMax; + return 0; } + + inline void draw_glyph(AVPicture *picture, FT_Bitmap *bitmap, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_fgcolor[3], unsigned char yuv_bgcolor[3], int outline) { int r, c; @@ -257,14 +338,15 @@ inline void draw_glyph(AVPicture *picture, FT_Bitmap *bitmap, unsigned int x, un /* 'draw' right pixel border */ COPY_3(dpixel, yuv_bgcolor); } - else if (in_glyph) + + if (in_glyph) /* see if we have a top/bottom border */ { /* top */ if ( (r-1 >= 0) && (! bitmap->buffer[(r-1)*bitmap->pitch +c/8] & (0x80>>(c%8))) ) /* we have a top border */ SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r-1)); - + /* bottom */ if ( (r+1 < height) && (! bitmap->buffer[(r+1)*bitmap->pitch +c/8] & (0x80>>(c%8))) ) /* we have a bottom border */ @@ -280,16 +362,66 @@ inline void draw_glyph(AVPicture *picture, FT_Bitmap *bitmap, unsigned int x, un } +inline void draw_box(AVPicture *picture, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_color[3]) +{ + int i, j; + + for (j = 0; (j < height); j++) + for (i = 0; (i < width); i++) + { + SET_PIXEL(picture, yuv_color, (i+x), (y+j)); + } + +} + + + + void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts) { ContextInfo *ci = (ContextInfo *) ctx; - FT_Face face = ci->ft_face; + FT_Face face = ci->face; FT_GlyphSlot slot = face->glyph; - char *text = ci->text; - int x = 0, y = 0, i=0, j=0, size=0, error; - int str_w, str_h; - char buff[1000]; + unsigned char *text = ci->text; + unsigned char c; + int x = 0, y = 0, i=0, size=0; + unsigned char buff[MAXSIZE_TEXT]; + unsigned char tbuff[MAXSIZE_TEXT]; time_t now = time(0); + int str_w, str_w_max; + FT_Vector pos[MAXSIZE_TEXT]; + FT_Vector delta; + + if (ci->file) + { + int fd = open(ci->file, O_RDONLY); + + if (fd < 0) + { + text = ci->text; + perror("WARNING: the file could not be opened. Using text provided with -t switch. "); + } + else + { + int l = read(fd, tbuff, sizeof(tbuff) - 1); + + if (l >= 0) + { + tbuff[l] = 0; + text = tbuff; + } + else + { + text = ci->text; + perror("WARNING: the file could not be opened. Using text provided with -t switch. "); + } + close(fd); + } + } + else + { + text = ci->text; + } strftime(buff, sizeof(buff), text, localtime(&now)); @@ -297,50 +429,91 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, size = strlen(text); - x = ci->x; - y = ci->y; - /* measure string size */ - str_w = str_h = 0; + + /* measure string size and save glyphs position*/ + str_w = str_w_max = 0; + x = ci->x; + y = ci->y; for (i=0; i < size; i++) { - /* load glyph image into the slot (erase previous one) */ - error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME ); - if (error) continue; /* ignore errors */ + c = text[i]; - str_w += slot->advance.x >> 6; - - if (slot->bitmap_top > str_h) - str_h = slot->bitmap_top; + /* kerning */ + if ( (ci->use_kerning) && (i > 0) && (ci->glyphs_index[c]) ) + { + FT_Get_Kerning( ci->face, + ci->glyphs_index[ text[i-1] ], + ci->glyphs_index[c], + ft_kerning_default, + &delta ); + + x += delta.x >> 6; + } + if (( (x + ci->advance[ c ]) >= width ) || ( c == '\n' )) + { + str_w = width - ci->x - 1; + + y += ci->text_height; + x = ci->x; + } + + + /* save position */ + pos[i].x = x + ci->bitmap_left[c]; + pos[i].y = y - ci->bitmap_top[c] + ci->baseline; + + + x += ci->advance[c]; + + + if (str_w > str_w_max) + str_w_max = str_w; + + } + + + + + if (ci->bg) + { + /* Check if it doesn't pass the limits */ + if ( str_w_max + ci->x >= width ) + str_w_max = width - ci->x - 1; + if ( y >= height ) + y = height - 1 - 2*ci->y; + + /* Draw Background */ + draw_box( picture, ci->x, ci->y, str_w_max, y - ci->y, ci->bgcolor ); } - if (ci->bg) - /* draw background */ - for (j = 0; (j < str_h) && (j+y < height); j++) - for (i = 0; (i < str_w) && (i+x < width); i++) - { - SET_PIXEL(picture, ci->bgcolor, (i+x), (y+j)); - } /* Draw Glyphs */ for (i=0; i < size; i++) { - /* load glyph image into the slot (erase previous one) */ - error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME ); - if (error) continue; /* ignore errors */ - - if (text[i] != '_') /* skip '_' (consider as space) */ + c = text[i]; + + if ( + ( (c == '_') && (text == ci->text) ) || /* skip '_' (consider as space) + IF text was specified in cmd line + (which doesn't like neasted quotes) */ + ( c == '\n' ) /* Skip new line char, just go to new line */ + ) + continue; + /* now, draw to our target surface */ - - draw_glyph( picture, &slot->bitmap, - x + slot->bitmap_left, - y - slot->bitmap_top + str_h, - width, height, - ci->fgcolor, ci->bgcolor, - ci->outline); + draw_glyph( picture, + &(ci->bitmaps[ c ]), + pos[i].x, + pos[i].y, + width, + height, + ci->fgcolor, + ci->bgcolor, + ci->outline ); /* increment pen position */ x += slot->advance.x >> 6; -- cgit v1.2.3