1 /*
2 * Copyright (C) 2007 Kevin Watters, Kevin Ollivier. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "GlyphBuffer.h"
28 #include "GraphicsContext.h"
29 #include "SimpleFontData.h"
30
31 #include <wx/dc.h>
32 #include <wx/dcgraph.h>
33 #include <wx/defs.h>
34 #include <wx/dcclient.h>
35 #include <wx/gdicmn.h>
36 #include <vector>
37
38 #if USE(WXGC)
39 #include <cairo.h>
40 #include <assert.h>
41
42 #include <pango/pango.h>
43 #include <pango/pangocairo.h>
44
45 // Use cairo-ft if a recent enough Pango version isn't available
46 #if !PANGO_VERSION_CHECK(1,18,0)
47 #include <cairo-ft.h>
48 #include <pango/pangofc-fontmap.h>
49 #endif
50
51 #endif
52
53 #include <gtk/gtk.h>
54
55 namespace WebCore {
56
57 #if USE(WXGC)
58 static PangoFontMap* g_fontMap;
59
pangoFontMap()60 PangoFontMap* pangoFontMap()
61 {
62 if (!g_fontMap)
63 g_fontMap = pango_cairo_font_map_get_default();
64
65 return g_fontMap;
66 }
67
createPangoFontForFont(const wxFont * wxfont)68 PangoFont* createPangoFontForFont(const wxFont* wxfont)
69 {
70 ASSERT(wxfont && wxfont->Ok());
71
72 const char* face = wxfont->GetFaceName().mb_str(wxConvUTF8);
73 char const* families[] = {
74 face,
75 0
76 };
77
78 switch (wxfont->GetFamily()) {
79 case wxFONTFAMILY_ROMAN:
80 families[1] = "serif";
81 break;
82 case wxFONTFAMILY_SWISS:
83 families[1] = "sans";
84 break;
85 case wxFONTFAMILY_MODERN:
86 families[1] = "monospace";
87 break;
88 default:
89 families[1] = "sans";
90 }
91
92 PangoFontDescription* description = pango_font_description_new();
93 pango_font_description_set_absolute_size(description, wxfont->GetPointSize() * PANGO_SCALE);
94
95 PangoFont* pangoFont = 0;
96 PangoContext* pangoContext = 0;
97
98 switch (wxfont->GetWeight()) {
99 case wxFONTWEIGHT_LIGHT:
100 pango_font_description_set_weight(description, PANGO_WEIGHT_LIGHT);
101 break;
102 case wxFONTWEIGHT_NORMAL:
103 pango_font_description_set_weight(description, PANGO_WEIGHT_NORMAL);
104 break;
105 case wxFONTWEIGHT_BOLD:
106 pango_font_description_set_weight(description, PANGO_WEIGHT_BOLD);
107 break;
108 }
109
110 switch (wxfont->GetStyle()) {
111 case wxFONTSTYLE_NORMAL:
112 pango_font_description_set_style(description, PANGO_STYLE_NORMAL);
113 break;
114 case wxFONTSTYLE_ITALIC:
115 pango_font_description_set_style(description, PANGO_STYLE_ITALIC);
116 break;
117 case wxFONTSTYLE_SLANT:
118 pango_font_description_set_style(description, PANGO_STYLE_OBLIQUE);
119 break;
120 }
121
122 PangoFontMap* fontMap = pangoFontMap();
123
124 pangoContext = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(fontMap));
125 for (unsigned i = 0; !pangoFont && i < G_N_ELEMENTS(families); i++) {
126 pango_font_description_set_family(description, families[i]);
127 pango_context_set_font_description(pangoContext, description);
128 pangoFont = pango_font_map_load_font(fontMap, pangoContext, description);
129 }
130 pango_font_description_free(description);
131
132 return pangoFont;
133 }
134
createScaledFontForFont(const wxFont * wxfont)135 cairo_scaled_font_t* createScaledFontForFont(const wxFont* wxfont)
136 {
137 ASSERT(wxfont && wxfont->Ok());
138
139 cairo_scaled_font_t* scaledFont = NULL;
140 PangoFont* pangoFont = createPangoFontForFont(wxfont);
141
142 #if PANGO_VERSION_CHECK(1,18,0)
143 if (pangoFont)
144 scaledFont = cairo_scaled_font_reference(pango_cairo_font_get_scaled_font(PANGO_CAIRO_FONT(pangoFont)));
145 #endif
146
147 return scaledFont;
148 }
149
pango_font_get_glyph(PangoFont * font,PangoContext * context,gunichar wc)150 PangoGlyph pango_font_get_glyph(PangoFont* font, PangoContext* context, gunichar wc)
151 {
152 PangoGlyph result = 0;
153 gchar buffer[7];
154
155 gint length = g_unichar_to_utf8(wc, buffer);
156 g_return_val_if_fail(length, 0);
157
158 GList* items = pango_itemize(context, buffer, 0, length, NULL, NULL);
159
160 if (g_list_length(items) == 1) {
161 PangoItem* item = static_cast<PangoItem*>(items->data);
162 PangoFont* tmpFont = item->analysis.font;
163 item->analysis.font = font;
164
165 PangoGlyphString* glyphs = pango_glyph_string_new();
166 pango_shape(buffer, length, &item->analysis, glyphs);
167
168 item->analysis.font = tmpFont;
169
170 if (glyphs->num_glyphs == 1)
171 result = glyphs->glyphs[0].glyph;
172 else
173 g_warning("didn't get 1 glyph but %d", glyphs->num_glyphs);
174
175 pango_glyph_string_free(glyphs);
176 }
177
178 g_list_foreach(items, (GFunc)pango_item_free, NULL);
179 g_list_free(items);
180
181 return result;
182 }
183 #endif // USE(WXGC)
184
185
drawTextWithSpacing(GraphicsContext * graphicsContext,const SimpleFontData * font,const wxColour & color,const GlyphBuffer & glyphBuffer,int from,int numGlyphs,const FloatPoint & point)186 void drawTextWithSpacing(GraphicsContext* graphicsContext, const SimpleFontData* font, const wxColour& color, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point)
187 {
188 #if USE(WXGC)
189 wxGCDC* dc = static_cast<wxGCDC*>(graphicsContext->platformContext());
190 wxGraphicsContext* gc = dc->GetGraphicsContext();
191 gc->PushState();
192 cairo_t* cr = (cairo_t*)gc->GetNativeContext();
193
194 wxFont* wxfont = font->getWxFont();
195 PangoFont* pangoFont = createPangoFontForFont(wxfont);
196 PangoFontMap* fontMap = pangoFontMap();
197 PangoContext* pangoContext = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(fontMap));
198 cairo_scaled_font_t* scaled_font = createScaledFontForFont(wxfont);
199 ASSERT(scaled_font);
200
201 cairo_glyph_t* glyphs = NULL;
202 glyphs = static_cast<cairo_glyph_t*>(malloc(sizeof(cairo_glyph_t) * numGlyphs));
203
204 float offset = point.x();
205
206 for (int i = 0; i < numGlyphs; i++) {
207 glyphs[i].index = pango_font_get_glyph(pangoFont, pangoContext, glyphBuffer.glyphAt(from + i));
208 glyphs[i].x = offset;
209 glyphs[i].y = point.y();
210 offset += glyphBuffer.advanceAt(from + i);
211 }
212
213 cairo_set_source_rgba(cr, color.Red()/255.0, color.Green()/255.0, color.Blue()/255.0, color.Alpha()/255.0);
214 cairo_set_scaled_font(cr, scaled_font);
215
216 cairo_show_glyphs(cr, glyphs, numGlyphs);
217
218 cairo_scaled_font_destroy(scaled_font);
219 gc->PopState();
220 #else
221 wxDC* dc = graphicsContext->platformContext();
222
223 wxFont* wxfont = font->getWxFont();
224 if (wxfont && wxfont->IsOk())
225 dc->SetFont(*wxfont);
226 dc->SetTextForeground(color);
227
228 // convert glyphs to wxString
229 GlyphBufferGlyph* glyphs = const_cast<GlyphBufferGlyph*>(glyphBuffer.glyphs(from));
230 int offset = point.x();
231 wxString text = wxEmptyString;
232 for (unsigned i = 0; i < numGlyphs; i++) {
233 text = text.Append((wxChar)glyphs[i]);
234 offset += glyphBuffer.advanceAt(from + i);
235 }
236
237 // the y point is actually the bottom point of the text, turn it into the top
238 float height = font->ascent() - font->descent();
239 wxCoord ypoint = (wxCoord) (point.y() - height);
240
241 dc->DrawText(text, (wxCoord)point.x(), ypoint);
242 #endif
243 }
244
245 }
246