pango_renderer.h File Reference

#include <pango/pango.h>
#include <pango/pangoft2.h>
#include <ft2build.h>
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Defines

#define PANGO_GLYPH_EMPTY   ((PangoGlyph)0x0FFFFFFF)

Functions

void render_single_line (unsigned char *bmp, PangoLayoutLine *pango_line, unsigned int font_hash_code, int x, int y, const int width)
 Render 1 single pango line at (x,y).
void render_single_glyph (unsigned char *bmp, int x, int y, const int width, const FT_BitmapGlyph glyph)
 Render 1 single glyph at (x,y).

Define Documentation

#define PANGO_GLYPH_EMPTY   ((PangoGlyph)0x0FFFFFFF)

Copyright (C) 2008 iRex Technologies B.V. All rights reserved.

Definition at line 37 of file pango_renderer.h.

Referenced by render_single_line().


Function Documentation

void render_single_glyph ( unsigned char *  bmp,
int  x,
int  y,
const int  width,
const FT_BitmapGlyph  glyph 
)

Render 1 single glyph at (x,y).

Definition at line 83 of file pango_renderer.cpp.

Referenced by render_single_line().

00088 {
00089     unsigned char *src = glyph->bitmap.buffer;
00090     unsigned char *dst = bmp + y * width + x;
00091 
00092     for(int i = 0; i < glyph->bitmap.rows; i++)
00093     {
00094         unsigned char *p = dst;
00095         for (int j = 0; j < glyph->bitmap.pitch; j++)
00096         {
00097             *p++ ^= *src++;
00098         }
00099         dst += width;
00100     }
00101 }

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void render_single_line ( unsigned char *  bmp,
PangoLayoutLine *  pango_line,
unsigned int  font_hash_code,
int  x,
int  y,
const int  width 
)

Render 1 single pango line at (x,y).

Copyright (C) 2008 iRex Technologies B.V. All rights reserved.

Definition at line 30 of file pango_renderer.cpp.

References data, FontCache::get_glyph(), FontCache::instance(), PANGO_GLYPH_EMPTY, and render_single_glyph().

Referenced by text::TextView::render().

00036 {
00037     // Draw run list .
00038     int glyph_pos_x = 0, glyph_pos_y = 0;
00039     GSList *runs_list = pango_line->runs;
00040 
00041     FontCache& font_cache = FontCache::instance();
00042 
00043     // draw each pango run
00044     while (runs_list)
00045     {
00046         // Get glyph data.
00047         PangoLayoutRun *run = (PangoLayoutRun *)runs_list->data;
00048         PangoGlyphString *glyphs = run->glyphs;
00049         FT_Face ft_face = pango_fc_font_lock_face(PANGO_FC_FONT(run->item->analysis.font));
00050 
00051         // draw each glyph
00052         for (int i=0; i<glyphs->num_glyphs; i++)
00053         {
00054             PangoGlyphGeometry geometry = glyphs->glyphs[i].geometry;
00055             glyph_pos_x = x + geometry.x_offset;
00056             glyph_pos_y = y + geometry.y_offset;
00057             x += geometry.width; 
00058 
00059             if (glyphs->glyphs[i].glyph == PANGO_GLYPH_EMPTY)
00060             {
00061                 continue;
00062             }
00063 
00064             // load glyph bitmap and copy
00065             FT_BitmapGlyph data = font_cache.get_glyph(ft_face,
00066                                                        font_hash_code,
00067                                                        glyphs->glyphs[i].glyph);
00068             if (data)
00069             {
00070                 render_single_glyph(bmp,
00071                                     PANGO_PIXELS(glyph_pos_x) + data->left,
00072                                     PANGO_PIXELS(glyph_pos_y) - data->top,
00073                                     width,
00074                                     data);
00075             }
00076         }
00077 
00078         pango_fc_font_unlock_face(PANGO_FC_FONT(run->item->analysis.font));
00079         runs_list = runs_list->next;
00080     }
00081 }

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