FM / layout

/usr/share/doc/libicu-devel/samples/layout/

/usr/share/doc/libicu-devel/samples/layout

Name	Size	Mode	Actions
arraymem.h	646	0644	edit dl rm
cgnomelayout.c	8648	0644	edit dl rm
clayout.c	10060	0644	edit dl rm
cmaps.cpp	5428	0644	edit dl rm
cmaps.h	2106	0644	edit dl rm
FontMap.cpp	7517	0644	edit dl rm
FontMap.GDI	426	0644	edit dl rm
FontMap.Gnome	392	0644	edit dl rm
FontMap.h	1887	0644	edit dl rm
FontTableCache.cpp	2427	0644	edit dl rm
FontTableCache.h	1089	0644	edit dl rm
GDIFontInstance.cpp	9826	0644	edit dl rm
GDIFontInstance.h	3688	0644	edit dl rm
GDIFontMap.cpp	1356	0644	edit dl rm
GDIFontMap.h	1262	0644	edit dl rm
gdiglue.cpp	1707	0644	edit dl rm
gdiglue.h	983	0644	edit dl rm
GDIGUISupport.cpp	862	0644	edit dl rm
GDIGUISupport.h	949	0644	edit dl rm
GnomeFontInstance.cpp	5557	0644	edit dl rm
GnomeFontInstance.h	3880	0644	edit dl rm
GnomeFontMap.cpp	1427	0644	edit dl rm
GnomeFontMap.h	1240	0644	edit dl rm
gnomeglue.cpp	1682	0644	edit dl rm
gnomeglue.h	986	0644	edit dl rm
GnomeGUISupport.cpp	1074	0644	edit dl rm
GnomeGUISupport.h	961	0644	edit dl rm
gnomelayout.cpp	8701	0644	edit dl rm
gsupport.h	370	0644	edit dl rm
GUISupport.h	890	0644	edit dl rm
layout.cpp	10032	0644	edit dl rm
layout.sln	1202	0644	edit dl rm
layout.vcxproj	13234	0644	edit dl rm
layout.vcxproj.filters	3132	0644	edit dl rm
LayoutSample.rc	3450	0644	edit dl rm
Makefile	2983	0644	edit dl rm
Makefile.in	2991	0644	edit dl rm
paragraph.cpp	7765	0644	edit dl rm
paragraph.h	2232	0644	edit dl rm
pflow.c	9490	0644	edit dl rm
pflow.h	940	0644	edit dl rm
readme.html	7500	0644	edit dl rm
RenderingSurface.h	1119	0644	edit dl rm
resource.h	907	0644	edit dl rm
rsurface.cpp	712	0644	edit dl rm
rsurface.h	528	0644	edit dl rm
Sample.txt	1697	0644	edit dl rm
ScriptCompositeFontInstance.cpp	3274	0644	edit dl rm
ScriptCompositeFontInstance.h	6302	0644	edit dl rm
sfnt.h	5021	0644	edit dl rm
Surface.cpp	892	0644	edit dl rm
Surface.h	519	0644	edit dl rm
ucreader.cpp	509	0644	edit dl rm
ucreader.h	422	0644	edit dl rm
UnicodeReader.cpp	4202	0644	edit dl rm
UnicodeReader.h	999	0644	edit dl rm

Edit: /usr/share/doc/libicu-devel/samples/layout/GnomeFontInstance.cpp (5557B)

/*
 *******************************************************************************
 *
 *   © 2016 and later: Unicode, Inc. and others.
 *   License & terms of use: http://www.unicode.org/copyright.html#License
 *
 *******************************************************************************
 *******************************************************************************
 *
 *   Copyright (C) 1999-2007, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
 *   file name:  GnomeFontInstance.cpp
 *
 *   created on: 08/30/2001
 *   created by: Eric R. Mader
 */

#include <gnome.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include FT_RENDER_H
#include FT_TRUETYPE_TABLES_H
#include <cairo.h>
#include <cairo-ft.h>

#include "layout/LETypes.h"
#include "layout/LESwaps.h"

#include "GnomeFontInstance.h"
#include "sfnt.h"
#include "cmaps.h"

GnomeSurface::GnomeSurface(GtkWidget *theWidget)
    : fWidget(theWidget)
{
    fCairo = gdk_cairo_create(fWidget->window);
}

GnomeSurface::~GnomeSurface()
{
    cairo_destroy(fCairo);
}

void GnomeSurface::drawGlyphs(const LEFontInstance *font, const LEGlyphID *glyphs, le_int32 count,
                              const float *positions, le_int32 x, le_int32 y, le_int32 /*width*/, le_int32 /*height*/)
{
    GnomeFontInstance *gFont = (GnomeFontInstance *) font;
    
    gFont->rasterizeGlyphs(fCairo, glyphs, count, positions, x, y);
}

GnomeFontInstance::GnomeFontInstance(FT_Library engine, const char *fontPathName, le_int16 pointSize, LEErrorCode &status)
    : FontTableCache(), fPointSize(pointSize), fUnitsPerEM(0), fAscent(0), fDescent(0), fLeading(0),
      fDeviceScaleX(1), fDeviceScaleY(1), fMapper(NULL)
{
    FT_Error error;

fFace      = NULL;
    fCairoFace = NULL;

error = FT_New_Face(engine, fontPathName, 0, &fFace);

if (error != 0) {
        printf("OOPS! Got error code %d\n", error);
        status = LE_FONT_FILE_NOT_FOUND_ERROR;
        return;
    }

// FIXME: what about the display resolution?
    fDeviceScaleX = ((float) 96) / 72;
    fDeviceScaleY = ((float) 96) / 72;

error = FT_Set_Char_Size(fFace, 0, pointSize << 6, 92, 92);
    
    fCairoFace = cairo_ft_font_face_create_for_ft_face(fFace, 0);

fUnitsPerEM = fFace->units_per_EM;

fAscent  = (le_int32) (yUnitsToPoints(fFace->ascender) * fDeviceScaleY);
    fDescent = (le_int32) -(yUnitsToPoints(fFace->descender) * fDeviceScaleY);
    fLeading = (le_int32) (yUnitsToPoints(fFace->height) * fDeviceScaleY) - fAscent - fDescent;

// printf("Face = %s, unitsPerEM = %d, ascent = %d, descent = %d\n", fontPathName, fUnitsPerEM, fAscent, fDescent);

if (error != 0) {
        status = LE_MEMORY_ALLOCATION_ERROR;
        return;
    }

status = initMapper();
}

GnomeFontInstance::~GnomeFontInstance()
{
    cairo_font_face_destroy(fCairoFace);
    
    if (fFace != NULL) {
        FT_Done_Face(fFace);
    }
}

LEErrorCode GnomeFontInstance::initMapper()
{
    LETag cmapTag = LE_CMAP_TABLE_TAG;
    const CMAPTable *cmap = (const CMAPTable *) readFontTable(cmapTag);

if (cmap == NULL) {
        return LE_MISSING_FONT_TABLE_ERROR;
    }

fMapper = CMAPMapper::createUnicodeMapper(cmap);

if (fMapper == NULL) {
        return LE_MISSING_FONT_TABLE_ERROR;
    }

return LE_NO_ERROR;
}

const void *GnomeFontInstance::getFontTable(LETag tableTag) const
{
    return FontTableCache::find(tableTag);
}

const void *GnomeFontInstance::readFontTable(LETag tableTag) const
{
    FT_ULong len = 0;
    FT_Byte *result = NULL;

FT_Load_Sfnt_Table(fFace, tableTag, 0, NULL, &len);

if (len > 0) {
        result = LE_NEW_ARRAY(FT_Byte, len);
        FT_Load_Sfnt_Table(fFace, tableTag, 0, result, &len);
    }

return result;
}

void GnomeFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
{
    advance.fX = 0;
    advance.fY = 0;

if (glyph >= 0xFFFE) {
        return;
    }

FT_Error error;

error = FT_Load_Glyph(fFace, glyph, FT_LOAD_DEFAULT);

if (error != 0) {
        return;
    }

advance.fX = fFace->glyph->metrics.horiAdvance >> 6;
    return;
}

le_bool GnomeFontInstance::getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const
{
    FT_Error error;

error = FT_Load_Glyph(fFace, glyph, FT_LOAD_DEFAULT);

if (error != 0) {
        return FALSE;
    }

if (pointNumber >= fFace->glyph->outline.n_points) {
        return FALSE;
    }

point.fX = fFace->glyph->outline.points[pointNumber].x >> 6;
    point.fY = fFace->glyph->outline.points[pointNumber].y >> 6;

return TRUE;
}

void GnomeFontInstance::rasterizeGlyphs(cairo_t *cairo, const LEGlyphID *glyphs, le_int32 glyphCount, const float *positions,
                                        le_int32 x, le_int32 y) const
{
    cairo_glyph_t *glyph_t = LE_NEW_ARRAY(cairo_glyph_t, glyphCount);
    le_int32 in, out;
    
    for (in = 0, out = 0; in < glyphCount; in += 1) {
        TTGlyphID glyph = LE_GET_GLYPH(glyphs[in]);
        
        if (glyph < 0xFFFE) {
            glyph_t[out].index = glyph;
            glyph_t[out].x     = x + positions[in*2];
            glyph_t[out].y     = y + positions[in*2 + 1];
            
            out += 1;
        }
    }
    
    cairo_set_font_face(cairo, fCairoFace);
    cairo_set_font_size(cairo, getXPixelsPerEm() * getScaleFactorX());
    cairo_show_glyphs(cairo, glyph_t, out);
    
    LE_DELETE_ARRAY(glyph_t);
}

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