From 648161bb0edfc3d43db63caed5cc5213bc6cb78f Mon Sep 17 00:00:00 2001 From: The Android Open Source Project Date: Tue, 3 Mar 2009 18:28:41 -0800 Subject: auto import from //depot/cupcake/@135843 --- WebCore/platform/graphics/gtk/FontGtk.cpp | 371 ------------------------------ 1 file changed, 371 deletions(-) delete mode 100644 WebCore/platform/graphics/gtk/FontGtk.cpp (limited to 'WebCore/platform/graphics/gtk/FontGtk.cpp') diff --git a/WebCore/platform/graphics/gtk/FontGtk.cpp b/WebCore/platform/graphics/gtk/FontGtk.cpp deleted file mode 100644 index 288ba91..0000000 --- a/WebCore/platform/graphics/gtk/FontGtk.cpp +++ /dev/null @@ -1,371 +0,0 @@ -/* - * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. - * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com - * Copyright (c) 2007 Hiroyuki Ikezoe - * Copyright (c) 2007 Kouhei Sutou - * Copyright (C) 2007 Alp Toker - * Copyright (C) 2008 Xan Lopez - * Copyright (C) 2008 Nuanti Ltd. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "config.h" -#include "Font.h" - -#include "GraphicsContext.h" -#include "NotImplemented.h" -#include "SimpleFontData.h" - -#include -#include -#include -#include -#if defined(USE_FREETYPE) -#include -#endif - -#if !defined(PANGO_VERSION_CHECK) -// PANGO_VERSION_CHECK() and pango_layout_get_line_readonly() appeared in 1.5.2 -#define pango_layout_get_line_readonly pango_layout_get_line -#define PANGO_VERSION_CHECK(major,minor,micro) 0 -#endif - -namespace WebCore { - -#define IS_HIGH_SURROGATE(u) ((UChar)(u) >= (UChar)0xd800 && (UChar)(u) <= (UChar)0xdbff) -#define IS_LOW_SURROGATE(u) ((UChar)(u) >= (UChar)0xdc00 && (UChar)(u) <= (UChar)0xdfff) - -static void utf16_to_utf8(const UChar* aText, gint aLength, char* &text, gint &length) -{ - gboolean need_copy = FALSE; - int i; - - for (i = 0; i < aLength; i++) { - if (!aText[i] || IS_LOW_SURROGATE(aText[i])) { - need_copy = TRUE; - break; - } - else if (IS_HIGH_SURROGATE(aText[i])) { - if (i < aLength - 1 && IS_LOW_SURROGATE(aText[i+1])) - i++; - else { - need_copy = TRUE; - break; - } - } - } - - if (need_copy) { - - /* Pango doesn't correctly handle nuls. We convert them to 0xff. */ - /* Also "validate" UTF-16 text to make sure conversion doesn't fail. */ - - UChar* p = (UChar*)g_memdup(aText, aLength * sizeof(aText[0])); - - /* don't need to reset i */ - for (i = 0; i < aLength; i++) { - if (!p[i] || IS_LOW_SURROGATE(p[i])) - p[i] = 0xFFFD; - else if (IS_HIGH_SURROGATE(p[i])) { - if (i < aLength - 1 && IS_LOW_SURROGATE(aText[i+1])) - i++; - else - p[i] = 0xFFFD; - } - } - - aText = p; - } - - glong items_written; - text = g_utf16_to_utf8(reinterpret_cast(aText), aLength, NULL, &items_written, NULL); - length = items_written; - - if (need_copy) - g_free((gpointer)aText); - -} - -static gchar* convertUniCharToUTF8(const UChar* characters, gint length, int from, int to) -{ - gchar* utf8 = 0; - gint new_length = 0; - utf16_to_utf8(characters, length, utf8, new_length); - if (!utf8) - return NULL; - - if (from > 0) { - // discard the first 'from' characters - // FIXME: we should do this before the conversion probably - gchar* str_left = g_utf8_offset_to_pointer(utf8, from); - gchar* tmp = g_strdup(str_left); - g_free(utf8); - utf8 = tmp; - } - - gchar* pos = utf8; - gint len = strlen(pos); - GString* ret = g_string_new_len(NULL, len); - - // replace line break by space - while (len > 0) { - gint index, start; - pango_find_paragraph_boundary(pos, len, &index, &start); - g_string_append_len(ret, pos, index); - if (index == start) - break; - g_string_append_c(ret, ' '); - pos += start; - len -= start; - } - return g_string_free(ret, FALSE); -} - -static void setPangoAttributes(const Font* font, const TextRun& run, PangoLayout* layout) -{ -#if defined(USE_FREETYPE) - if (font->primaryFont()->m_font.m_pattern) { - PangoFontDescription* desc = pango_fc_font_description_from_pattern(font->primaryFont()->m_font.m_pattern, FALSE); - pango_layout_set_font_description(layout, desc); - pango_font_description_free(desc); - } -#elif defined(USE_PANGO) - if (font->primaryFont()->m_font.m_font) { - PangoFontDescription* desc = pango_font_describe(font->primaryFont()->m_font.m_font); - pango_layout_set_font_description(layout, desc); - pango_font_description_free(desc); - } -#endif - - pango_layout_set_auto_dir(layout, FALSE); - - PangoContext* pangoContext = pango_layout_get_context(layout); - PangoDirection direction = run.rtl() ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR; - pango_context_set_base_dir(pangoContext, direction); - PangoAttrList* list = pango_attr_list_new(); - PangoAttribute* attr; - - attr = pango_attr_size_new_absolute(font->pixelSize() * PANGO_SCALE); - attr->end_index = G_MAXUINT; - pango_attr_list_insert_before(list, attr); - - if (!run.spacingDisabled()) { - attr = pango_attr_letter_spacing_new(font->letterSpacing() * PANGO_SCALE); - attr->end_index = G_MAXUINT; - pango_attr_list_insert_before(list, attr); - } - - // Pango does not yet support synthesising small caps - // See http://bugs.webkit.org/show_bug.cgi?id=15610 - - pango_layout_set_attributes(layout, list); - pango_attr_list_unref(list); -} - -void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const -{ - cairo_t* cr = context->platformContext(); - cairo_save(cr); - cairo_translate(cr, point.x(), point.y()); - - PangoLayout* layout = pango_cairo_create_layout(cr); - setPangoAttributes(this, run, layout); - - gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length()); - pango_layout_set_text(layout, utf8, -1); - - // Our layouts are single line - PangoLayoutLine* layoutLine = pango_layout_get_line_readonly(layout, 0); - - GdkRegion* partialRegion = NULL; - if (to - from != run.length()) { - // Clip the region of the run to be rendered - char* start = g_utf8_offset_to_pointer(utf8, from); - char* end = g_utf8_offset_to_pointer(start, to - from); - int ranges[] = {start - utf8, end - utf8}; - partialRegion = gdk_pango_layout_line_get_clip_region(layoutLine, 0, 0, ranges, 1); - gdk_region_shrink(partialRegion, 0, -pixelSize()); - } - - Color fillColor = context->fillColor(); - float red, green, blue, alpha; - - // Text shadow, inspired by FontMac - IntSize shadowSize; - int shadowBlur = 0; - Color shadowColor; - bool hasShadow = context->textDrawingMode() == cTextFill && - context->getShadow(shadowSize, shadowBlur, shadowColor); - - // TODO: Blur support - if (hasShadow) { - // Disable graphics context shadows (not yet implemented) and paint them manually - context->clearShadow(); - Color shadowFillColor(shadowColor.red(), shadowColor.green(), shadowColor.blue(), shadowColor.alpha() * fillColor.alpha() / 255); - cairo_save(cr); - - shadowFillColor.getRGBA(red, green, blue, alpha); - cairo_set_source_rgba(cr, red, green, blue, alpha); - - cairo_translate(cr, shadowSize.width(), shadowSize.height()); - - if (partialRegion) { - gdk_cairo_region(cr, partialRegion); - cairo_clip(cr); - } - - pango_cairo_show_layout_line(cr, layoutLine); - - cairo_restore(cr); - } - - fillColor.getRGBA(red, green, blue, alpha); - cairo_set_source_rgba(cr, red, green, blue, alpha); - - if (partialRegion) { - gdk_cairo_region(cr, partialRegion); - cairo_clip(cr); - } - - pango_cairo_show_layout_line(cr, layoutLine); - - if (context->textDrawingMode() & cTextStroke) { - Color strokeColor = context->strokeColor(); - strokeColor.getRGBA(red, green, blue, alpha); - cairo_set_source_rgba(cr, red, green, blue, alpha); - pango_cairo_layout_line_path(cr, layoutLine); - cairo_set_line_width(cr, context->strokeThickness()); - cairo_stroke(cr); - } - - // Re-enable the platform shadow we disabled earlier - if (hasShadow) - context->setShadow(shadowSize, shadowBlur, shadowColor); - - // Pango sometimes leaves behind paths we don't want - cairo_new_path(cr); - - if (partialRegion) - gdk_region_destroy(partialRegion); - - g_free(utf8); - g_object_unref(layout); - - cairo_restore(cr); -} - -// We should create the layout with our actual context but we can't access it from here. -static PangoLayout* getDefaultPangoLayout(const TextRun& run) -{ - static PangoFontMap* map = pango_cairo_font_map_get_default(); -#if PANGO_VERSION_CHECK(1,21,5) - static PangoContext* pangoContext = pango_font_map_create_context(map); -#else - // Deprecated in Pango 1.21. - static PangoContext* pangoContext = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(map)); -#endif - PangoLayout* layout = pango_layout_new(pangoContext); - - return layout; -} - -float Font::floatWidthForComplexText(const TextRun& run) const -{ - if (run.length() == 0) - return 0.0f; - - PangoLayout* layout = getDefaultPangoLayout(run); - setPangoAttributes(this, run, layout); - - gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length()); - pango_layout_set_text(layout, utf8, -1); - - int width; - pango_layout_get_pixel_size(layout, &width, 0); - - g_free(utf8); - g_object_unref(layout); - - return width; -} - -int Font::offsetForPositionForComplexText(const TextRun& run, int x, bool includePartialGlyphs) const -{ - PangoLayout* layout = getDefaultPangoLayout(run); - setPangoAttributes(this, run, layout); - - gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length()); - pango_layout_set_text(layout, utf8, -1); - - int index, trailing; - pango_layout_xy_to_index(layout, x * PANGO_SCALE, 1, &index, &trailing); - glong offset = g_utf8_pointer_to_offset(utf8, utf8 + index); - if (includePartialGlyphs) - offset += trailing; - - g_free(utf8); - g_object_unref(layout); - - return offset; -} - -FloatRect Font::selectionRectForComplexText(const TextRun& run, const IntPoint& point, int h, int from, int to) const -{ - PangoLayout* layout = getDefaultPangoLayout(run); - setPangoAttributes(this, run, layout); - - gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length()); - pango_layout_set_text(layout, utf8, -1); - - char* start = g_utf8_offset_to_pointer(utf8, from); - char* end = g_utf8_offset_to_pointer(start, to - from); - - if (run.ltr()) { - from = start - utf8; - to = end - utf8; - } else { - from = end - utf8; - to = start - utf8; - } - - PangoLayoutLine* layoutLine = pango_layout_get_line_readonly(layout, 0); - int x_pos; - - x_pos = 0; - if (from < layoutLine->length) - pango_layout_line_index_to_x(layoutLine, from, FALSE, &x_pos); - float beforeWidth = PANGO_PIXELS_FLOOR(x_pos); - - x_pos = 0; - if (run.ltr() || to < layoutLine->length) - pango_layout_line_index_to_x(layoutLine, to, FALSE, &x_pos); - float afterWidth = PANGO_PIXELS(x_pos); - - g_free(utf8); - g_object_unref(layout); - - return FloatRect(point.x() + beforeWidth, point.y(), afterWidth - beforeWidth, h); -} - -} -- cgit v1.1