grey+alpha rendering support (for .sub)

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@203 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 71 insertions, 0 deletions

diff --git a/libvo/sub.c b/libvo/sub.c
new file mode 100644
index 0000000000..1ab62fcc6f
--- /dev/null
+++ b/libvo/sub.c
@@ -0,0 +1,71 @@
+
+typedef struct {
+    unsigned char *bmp;
+    unsigned char *pal;
+    int w,h,c;
+} raw_file;
+
+raw_file* load_raw(char *name){
+    int bpp;
+    raw_file* raw=malloc(sizeof(raw_file));
+    unsigned char head[32];
+    FILE *f=fopen(name,"rb");
+    if(!f) return NULL;                        // can't open
+    if(fread(head,32,1,f)<1) return NULL;        // too small
+    if(memcmp(head,"mhwanh",6)) return NULL;        // not raw file
+    raw->w=head[8]*256+head[9];
+    raw->h=head[10]*256+head[11];
+    raw->c=head[12]*256+head[13];
+    if(raw->c>256) return NULL;                 // too many colors!?
+    printf("RAW: %d x %d, %d colors\n",raw->w,raw->h,raw->c);
+    if(raw->c){
+        raw->pal=malloc(raw->c*3);
+        fread(raw->pal,3,raw->c,f);
+        bpp=1;
+    } else {
+        raw->pal=NULL;
+        bpp=3;
+    }
+    raw->bmp=malloc(raw->h*raw->w*bpp);
+    fread(raw->bmp,raw->h*raw->w*bpp,1,f);
+    fclose(f);
+    return raw;
+}
+
+static int vo_font_loaded=-1;
+static raw_file* vo_font_bmp=NULL;
+static raw_file* vo_font_alpha=NULL;
+
+void vo_load_font(char *bmpname,char *alphaname){
+    vo_font_loaded=0;
+    if(!(vo_font_bmp=load_raw(bmpname)))
+        printf("vo: Can't load font BMP\n"); else
+    if(!(vo_font_alpha=load_raw(alphaname)))
+        printf("vo: Can't load font Alpha\n"); else
+    vo_font_loaded=1;
+}
+
+int vo_sub_lines=2;
+char* vo_sub_text[8];
+
+
+void vo_draw_text(void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)){
+    int i;
+    int y=100;
+
+    if(vo_sub_lines<=0) return; // no text
+    
+    if(vo_font_loaded==-1) vo_load_font("font_b.raw","font_a.raw");
+    if(!vo_font_loaded) return; // no font
+    
+//    if(!vo_font_bmp) vo_load_font("mplayer_font_lowres_bitmap.raw","mplayer_font_lowres_alpha.raw");
+    
+    for(i=0;i<vo_sub_lines;i++){
+        char* text="Hello World!"; //vo_sub_text[i];
+        draw_alpha(100,y,50,vo_font_bmp->h,vo_font_bmp->bmp,vo_font_alpha->bmp,vo_font_bmp->w);
+//        x11_draw_alpha(100,y,50,vo_font_bmp->h,vo_font_bmp->bmp,vo_font_alpha->bmp,vo_font_bmp->w);
+        y+=50;
+    }
+
+}
+