pango_renderer.cpp File Reference

#include "font_cache.h"
#include "pango_renderer.h"

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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).

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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().

{
    unsigned char *src = glyph->bitmap.buffer;
    unsigned char *dst = bmp + y * width + x;

    for(int i = 0; i < glyph->bitmap.rows; i++)
    {
        unsigned char *p = dst;
        for (int j = 0; j < glyph->bitmap.pitch; j++)
        {
            *p++ ^= *src++;
        }
        dst += width;
    }
}

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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().

{
    // Draw run list .
    int glyph_pos_x = 0, glyph_pos_y = 0;
    GSList *runs_list = pango_line->runs;

    FontCache& font_cache = FontCache::instance();

    // draw each pango run
    while (runs_list)
    {
        // Get glyph data.
        PangoLayoutRun *run = (PangoLayoutRun *)runs_list->data;
        PangoGlyphString *glyphs = run->glyphs;
        FT_Face ft_face = pango_fc_font_lock_face(PANGO_FC_FONT(run->item->analysis.font));

        // draw each glyph
        for (int i=0; i<glyphs->num_glyphs; i++)
        {
            PangoGlyphGeometry geometry = glyphs->glyphs[i].geometry;
            glyph_pos_x = x + geometry.x_offset;
            glyph_pos_y = y + geometry.y_offset;
            x += geometry.width; 

            if (glyphs->glyphs[i].glyph == PANGO_GLYPH_EMPTY)
            {
                continue;
            }

            // load glyph bitmap and copy
            FT_BitmapGlyph data = font_cache.get_glyph(ft_face,
                                                       font_hash_code,
                                                       glyphs->glyphs[i].glyph);
            if (data)
            {
                render_single_glyph(bmp,
                                    PANGO_PIXELS(glyph_pos_x) + data->left,
                                    PANGO_PIXELS(glyph_pos_y) - data->top,
                                    width,
                                    data);
            }
        }

        pango_fc_font_unlock_face(PANGO_FC_FONT(run->item->analysis.font));
        runs_list = runs_list->next;
    }
}

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