fix empty strings
[enigma2.git] / lib / gdi / font.cpp
index 9a7ec069737613492d6e9464958440bb87b309c9..77c8de94e373682106f487257cc6d59ae61829f7 100644 (file)
@@ -18,7 +18,7 @@
 #include <lib/base/init.h>
 #include <lib/base/init_num.h>
 
-//#define HAVE_FRIBIDI
+#define HAVE_FRIBIDI
 // until we have it in the cdk
 
 #ifdef HAVE_FRIBIDI
@@ -205,12 +205,10 @@ float fontRenderClass::getLineHeight(const gFont& font)
                return 0;
        }
        int linegap=current_face->size->metrics.height-(current_face->size->metrics.ascender+current_face->size->metrics.descender);
-       float height=(current_face->size->metrics.ascender+current_face->size->metrics.descender+linegap/2.0)/64;
-       delete fnt;
+       float height=(current_face->size->metrics.ascender+current_face->size->metrics.descender+linegap)/64.0;
        return height;
 }
 
-
 fontRenderClass::~fontRenderClass()
 {
        singleLock s(ftlock);
@@ -331,30 +329,39 @@ int eTextPara::appendGlyph(Font *current_font, FT_Face current_face, FT_UInt gly
        ng.bbox.setWidth( glyph->width );
        ng.bbox.setHeight( glyph->height );
 
-       xadvance+=kern;
+       xadvance += kern;
+       ng.bbox.setWidth(xadvance);
 
-       ng.x=cursor.x()+kern;
-       ng.y=cursor.y();
-       ng.w=xadvance;
-       ng.font=current_font;
-       ng.glyph_index=glyphIndex;
-       ng.flags=flags;
+       ng.x = cursor.x()+kern;
+       ng.y = cursor.y();
+       ng.w = xadvance;
+       ng.font = current_font;
+       ng.glyph_index = glyphIndex;
+       ng.flags = flags;
        glyphs.push_back(ng);
 
-       cursor+=ePoint(xadvance, 0);
-       previous=glyphIndex;
+       cursor += ePoint(xadvance, 0);
+       previous = glyphIndex;
        return 0;
 }
 
 void eTextPara::calc_bbox()
 {
-       boundBox.setLeft( 32000 );
-       boundBox.setTop( 32000 );
-       boundBox.setRight( -32000 );         // for each glyph image, compute its bounding box, translate it,
-       boundBox.setBottom( -32000 );
-       // and grow the string bbox
+       if (!glyphs.size())
+       {
+               bboxValid = 0;
+               boundBox = eRect();
+               return;
+       }
+       
+       bboxValid = 1;
 
-       for ( glyphString::iterator i(glyphs.begin()); i != glyphs.end(); ++i)
+       glyphString::iterator i(glyphs.begin());
+       
+       boundBox = i->bbox; 
+       ++i;
+
+       for (; i != glyphs.end(); ++i)
        {
                if ( i->flags & GS_ISSPACE )
                        continue;
@@ -368,8 +375,6 @@ void eTextPara::calc_bbox()
                        boundBox.setBottom( i->bbox.bottom() );
        }
 //     eDebug("boundBox left = %i, top = %i, right = %i, bottom = %i", boundBox.left(), boundBox.top(), boundBox.right(), boundBox.bottom() );
-       if ( glyphs.size() )
-               bboxValid=1;
 }
 
 void eTextPara::newLine(int flags)
@@ -379,7 +384,7 @@ void eTextPara::newLine(int flags)
        cursor.setX(left);
        previous=0;
        int linegap=current_face->size->metrics.height-(current_face->size->metrics.ascender+current_face->size->metrics.descender);
-       cursor+=ePoint(0, (current_face->size->metrics.ascender+current_face->size->metrics.descender+linegap*1/2)>>6);
+       cursor+=ePoint(0, (current_face->size->metrics.ascender+current_face->size->metrics.descender+linegap)>>6);
        if (maximum.height()<cursor.y())
                maximum.setHeight(cursor.y());
        previous=0;
@@ -401,6 +406,7 @@ void eTextPara::setFont(const gFont *font)
 }
 
 std::string eTextPara::replacement_facename;
+std::set<int> eTextPara::forced_replaces;
 
 void eTextPara::setFont(Font *fnt, Font *replacement)
 {
@@ -437,7 +443,7 @@ void eTextPara::setFont(Font *fnt, Font *replacement)
 void
 shape (std::vector<unsigned long> &string, const std::vector<unsigned long> &text);
 
-int eTextPara::renderString(const std::string &string, int rflags)
+int eTextPara::renderString(const char *string, int rflags)
 {
        singleLock s(ftlock);
        
@@ -461,11 +467,12 @@ int eTextPara::renderString(const std::string &string, int rflags)
        }
        
        std::vector<unsigned long> uc_string, uc_visual;
-       uc_string.reserve(string.length());
+       if (string)
+               uc_string.reserve(strlen(string));
        
-       std::string::const_iterator p(string.begin());
+       const char *p = string ? string : "";
 
-       while(p != string.end())
+       while (*p)
        {
                unsigned int unicode=(unsigned char)*p++;
 
@@ -475,28 +482,28 @@ int eTextPara::renderString(const std::string &string, int rflags)
                        {
                                unicode&=0x1F;
                                unicode<<=6;
-                               if (p != string.end())
+                               if (p)
                                        unicode|=(*p++)&0x3F;
                        } else if ((unicode & 0xF0)==0xE0) // three bytes
                        {
                                unicode&=0x0F;
                                unicode<<=6;
-                               if (p != string.end())
+                               if (p)
                                        unicode|=(*p++)&0x3F;
                                unicode<<=6;
-                               if (p != string.end())
+                               if (p)
                                        unicode|=(*p++)&0x3F;
                        } else if ((unicode & 0xF8)==0xF0) // four bytes
                        {
                                unicode&=0x07;
                                unicode<<=6;
-                               if (p != string.end())
+                               if (p)
                                        unicode|=(*p++)&0x3F;
                                unicode<<=6;
-                               if (p != string.end())
+                               if (p)
                                        unicode|=(*p++)&0x3F;
                                unicode<<=6;
-                               if (p != string.end())
+                               if (p)
                                        unicode|=(*p++)&0x3F;
                        }
                }
@@ -582,9 +589,10 @@ nprint:    isprintable=0;
                }
                if (isprintable)
                {
-                       FT_UInt index;
-
-                       index=(rflags&RS_DIRECT)? *i : FT_Get_Char_Index(current_face, *i);
+                       FT_UInt index = 0;
+                       
+                       if (forced_replaces.find(*i) == forced_replaces.end())
+                               index=(rflags&RS_DIRECT)? *i : FT_Get_Char_Index(current_face, *i);
 
                        if (!index)
                        {
@@ -630,14 +638,22 @@ void eTextPara::blit(gDC &dc, const ePoint &offset, const gRGB &background, cons
        gSurface *surface = target->surface;
 
        register int opcode;
-       gColor *lookup8=0;
-       __u32 lookup32[16];
-               
+
+       gColor *lookup8, lookup8_invert[16];
+       gColor *lookup8_normal=0;
+
+       __u32 lookup32_normal[16], lookup32_invert[16], *lookup32;
+       
        if (surface->bpp == 8)
        {
                if (surface->clut.data)
                {
-                       lookup8=getColor(surface->clut, background, foreground).lookup;
+                       lookup8_normal=getColor(surface->clut, background, foreground).lookup;
+                       
+                       int i;
+                       for (i=0; i<16; ++i)
+                               lookup8_invert[i] = lookup8_normal[i^0xF];
+                       
                        opcode=0;
                } else
                        opcode=1;
@@ -648,15 +664,17 @@ void eTextPara::blit(gDC &dc, const ePoint &offset, const gRGB &background, cons
                {
                        lookup8=getColor(surface->clut, background, foreground).lookup;
                        for (int i=0; i<16; ++i)
-                               lookup32[i]=((surface->clut.data[lookup8[i]].a<<24)|
+                               lookup32_normal[i]=((surface->clut.data[lookup8[i]].a<<24)|
                                        (surface->clut.data[lookup8[i]].r<<16)|
                                        (surface->clut.data[lookup8[i]].g<<8)|
                                        (surface->clut.data[lookup8[i]].b))^0xFF000000;
                } else
                {
                        for (int i=0; i<16; ++i)
-                               lookup32[i]=(0x010101*i)|0xFF000000;
+                               lookup32_normal[i]=(0x010101*i)|0xFF000000;
                }
+               for (int i=0; i<16; ++i)
+                       lookup32_invert[i]=lookup32_normal[i^0xF];
        } else
        {
                eWarning("can't render to %dbpp", surface->bpp);
@@ -667,80 +685,93 @@ void eTextPara::blit(gDC &dc, const ePoint &offset, const gRGB &background, cons
        gRegion clip = dc.getClip() & area;
 
        int buffer_stride=surface->stride;
-
-       for (glyphString::iterator i(glyphs.begin()); i != glyphs.end(); ++i)
+       
+       for (unsigned int c = 0; c < clip.rects.size(); ++c)
        {
-               static FTC_SBit glyph_bitmap;
-               if (fontRenderClass::instance->getGlyphBitmap(&i->font->font, i->glyph_index, &glyph_bitmap))
-                       continue;
-               int rx=i->x+glyph_bitmap->left + offset.x();
-               int ry=i->y-glyph_bitmap->top  + offset.y();
-               
-               __u8 *d=(__u8*)(surface->data)+buffer_stride*ry+rx*surface->bypp;
-               __u8 *s=glyph_bitmap->buffer;
-               register int sx=glyph_bitmap->width;
-               int sy=glyph_bitmap->height;
-               if ((sy+ry) >= clip.extends.bottom())
-                       sy=clip.extends.bottom()-ry;
-               if ((sx+rx) >= clip.extends.right())
-                       sx=clip.extends.right()-rx;
-               if (rx < clip.extends.left())
-               {
-                       int diff=clip.extends.left()-rx;
-                       s+=diff;
-                       sx-=diff;
-                       rx+=diff;
-                       d+=diff*surface->bypp;
-               }
-               if (ry < clip.extends.top())
+               for (glyphString::iterator i(glyphs.begin()); i != glyphs.end(); ++i)
                {
-                       int diff=clip.extends.top()-ry;
-                       s+=diff*glyph_bitmap->pitch;
-                       sy-=diff;
-                       ry+=diff;
-                       d+=diff*buffer_stride;
-               }
-               if (sx>0)
-                       for (int ay=0; ay<sy; ay++)
+                       if (!(i->flags & GS_INVERT))
                        {
-                               if (!opcode)            // 4bit lookup to 8bit
-                               {
-                                       register __u8 *td=d;
-                                       register int ax;
-                                       
-                                       for (ax=0; ax<sx; ax++)
-                                       {       
-                                               register int b=(*s++)>>4;
-                                               if(b)
-                                                       *td++=lookup8[b];
-                                               else
-                                                       td++;
-                                       }
-                               } else if (opcode == 1) // 8bit direct
-                               {
-                                       register __u8 *td=d;
-                                       register int ax;
-                                       for (ax=0; ax<sx; ax++)
-                                       {       
-                                               register int b=*s++;
-                                               *td++^=b;
-                                       }
-                               } else
+                               lookup8 = lookup8_normal;
+                               lookup32 = lookup32_normal;
+                       } else
+                       {
+                               lookup8 = lookup8_invert;
+                               lookup32 = lookup32_invert;
+                       }
+               
+                       static FTC_SBit glyph_bitmap;
+                       if (fontRenderClass::instance->getGlyphBitmap(&i->font->font, i->glyph_index, &glyph_bitmap))
+                               continue;
+                       int rx=i->x+glyph_bitmap->left + offset.x();
+                       int ry=i->y-glyph_bitmap->top  + offset.y();
+               
+                       __u8 *d=(__u8*)(surface->data)+buffer_stride*ry+rx*surface->bypp;
+                       __u8 *s=glyph_bitmap->buffer;
+                       register int sx=glyph_bitmap->width;
+                       int sy=glyph_bitmap->height;
+                       if ((sy+ry) >= clip.rects[c].bottom())
+                               sy=clip.rects[c].bottom()-ry;
+                       if ((sx+rx) >= clip.rects[c].right())
+                               sx=clip.rects[c].right()-rx;
+                       if (rx < clip.rects[c].left())
+                       {
+                               int diff=clip.rects[c].left()-rx;
+                               s+=diff;
+                               sx-=diff;
+                               rx+=diff;
+                               d+=diff*surface->bypp;
+                       }
+                       if (ry < clip.rects[c].top())
+                       {
+                               int diff=clip.rects[c].top()-ry;
+                               s+=diff*glyph_bitmap->pitch;
+                               sy-=diff;
+                               ry+=diff;
+                               d+=diff*buffer_stride;
+                       }
+                       if (sx>0)
+                               for (int ay=0; ay<sy; ay++)
                                {
-                                       register __u32 *td=(__u32*)d;
-                                       register int ax;
-                                       for (ax=0; ax<sx; ax++)
-                                       {       
-                                               register int b=(*s++)>>4;
-                                               if(b)
-                                                       *td++=lookup32[b];
-                                               else
-                                                       td++;
+                                       if (!opcode)            // 4bit lookup to 8bit
+                                       {
+                                               register __u8 *td=d;
+                                               register int ax;
+                                               
+                                               for (ax=0; ax<sx; ax++)
+                                               {       
+                                                       register int b=(*s++)>>4;
+                                                       if(b)
+                                                               *td++=lookup8[b];
+                                                       else
+                                                               td++;
+                                               }
+                                       } else if (opcode == 1) // 8bit direct
+                                       {
+                                               register __u8 *td=d;
+                                               register int ax;
+                                               for (ax=0; ax<sx; ax++)
+                                               {       
+                                                       register int b=*s++;
+                                                       *td++^=b;
+                                               }
+                                       } else
+                                       {
+                                               register __u32 *td=(__u32*)d;
+                                               register int ax;
+                                               for (ax=0; ax<sx; ax++)
+                                               {       
+                                                       register int b=(*s++)>>4;
+                                                       if(b)
+                                                               *td++=lookup32[b];
+                                                       else
+                                                               td++;
+                                               }
                                        }
+                                       s+=glyph_bitmap->pitch-sx;
+                                       d+=buffer_stride;
                                }
-                               s+=glyph_bitmap->pitch-sx;
-                               d+=buffer_stride;
-                       }
+               }
        }
 }