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Diffstat (limited to 'gfx/font_win.cc')
| -rw-r--r-- | gfx/font_win.cc | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/gfx/font_win.cc b/gfx/font_win.cc deleted file mode 100644 index f9b7243..0000000 --- a/gfx/font_win.cc +++ /dev/null @@ -1,216 +0,0 @@ -// Copyright (c) 2010 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -#include "gfx/font.h" - -#include <windows.h> -#include <math.h> - -#include <algorithm> - -#include "base/logging.h" -#include "base/string_util.h" -#include "base/win_util.h" -#include "gfx/canvas_skia.h" - -namespace gfx { - -// static -Font::HFontRef* Font::base_font_ref_; - -// static -Font::AdjustFontCallback Font::adjust_font_callback = NULL; -Font::GetMinimumFontSizeCallback Font::get_minimum_font_size_callback = NULL; - -// If the tmWeight field of a TEXTMETRIC structure has a value >= this, the -// font is bold. -static const int kTextMetricWeightBold = 700; - -// Returns either minimum font allowed for a current locale or -// lf_height + size_delta value. -static int AdjustFontSize(int lf_height, int size_delta) { - if (lf_height < 0) { - lf_height -= size_delta; - } else { - lf_height += size_delta; - } - int min_font_size = 0; - if (Font::get_minimum_font_size_callback) - min_font_size = Font::get_minimum_font_size_callback(); - // Make sure lf_height is not smaller than allowed min font size for current - // locale. - if (abs(lf_height) < min_font_size) { - return lf_height < 0 ? -min_font_size : min_font_size; - } else { - return lf_height; - } -} - -// -// Font -// - -Font::Font() - : font_ref_(GetBaseFontRef()) { -} - -int Font::height() const { - return font_ref_->height(); -} - -int Font::baseline() const { - return font_ref_->baseline(); -} - -int Font::ave_char_width() const { - return font_ref_->ave_char_width(); -} - -int Font::GetExpectedTextWidth(int length) const { - return length * std::min(font_ref_->dlu_base_x(), ave_char_width()); -} - -int Font::style() const { - return font_ref_->style(); -} - -NativeFont Font::nativeFont() const { - return hfont(); -} - -// static -Font Font::CreateFont(HFONT font) { - DCHECK(font); - LOGFONT font_info; - GetObject(font, sizeof(LOGFONT), &font_info); - return Font(CreateHFontRef(CreateFontIndirect(&font_info))); -} - -Font Font::CreateFont(const std::wstring& font_name, int font_size) { - HDC hdc = GetDC(NULL); - long lf_height = -MulDiv(font_size, GetDeviceCaps(hdc, LOGPIXELSY), 72); - ReleaseDC(NULL, hdc); - HFONT hf = ::CreateFont(lf_height, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - font_name.c_str()); - return Font::CreateFont(hf); -} - -// static -Font::HFontRef* Font::GetBaseFontRef() { - if (base_font_ref_ == NULL) { - NONCLIENTMETRICS metrics; - win_util::GetNonClientMetrics(&metrics); - - if (adjust_font_callback) - adjust_font_callback(&metrics.lfMessageFont); - metrics.lfMessageFont.lfHeight = - AdjustFontSize(metrics.lfMessageFont.lfHeight, 0); - HFONT font = CreateFontIndirect(&metrics.lfMessageFont); - DLOG_ASSERT(font); - base_font_ref_ = Font::CreateHFontRef(font); - // base_font_ref_ is global, up the ref count so it's never deleted. - base_font_ref_->AddRef(); - } - return base_font_ref_; -} - -const std::wstring& Font::FontName() const { - return font_ref_->font_name(); -} - -int Font::FontSize() { - LOGFONT font_info; - GetObject(hfont(), sizeof(LOGFONT), &font_info); - long lf_height = font_info.lfHeight; - HDC hdc = GetDC(NULL); - int device_caps = GetDeviceCaps(hdc, LOGPIXELSY); - int font_size = 0; - if (device_caps != 0) { - float font_size_float = -static_cast<float>(lf_height)*72/device_caps; - font_size = static_cast<int>(::ceil(font_size_float - 0.5)); - } - ReleaseDC(NULL, hdc); - return font_size; -} - -Font::HFontRef::HFontRef(HFONT hfont, - int height, - int baseline, - int ave_char_width, - int style, - int dlu_base_x) - : hfont_(hfont), - height_(height), - baseline_(baseline), - ave_char_width_(ave_char_width), - style_(style), - dlu_base_x_(dlu_base_x) { - DLOG_ASSERT(hfont); - - LOGFONT font_info; - GetObject(hfont_, sizeof(LOGFONT), &font_info); - font_name_ = std::wstring(font_info.lfFaceName); -} - -Font::HFontRef::~HFontRef() { - DeleteObject(hfont_); -} - -Font Font::DeriveFont(int size_delta, int style) const { - LOGFONT font_info; - GetObject(hfont(), sizeof(LOGFONT), &font_info); - font_info.lfHeight = AdjustFontSize(font_info.lfHeight, size_delta); - font_info.lfUnderline = ((style & UNDERLINED) == UNDERLINED); - font_info.lfItalic = ((style & ITALIC) == ITALIC); - font_info.lfWeight = (style & BOLD) ? FW_BOLD : FW_NORMAL; - - HFONT hfont = CreateFontIndirect(&font_info); - return Font(CreateHFontRef(hfont)); -} - -int Font::GetStringWidth(const std::wstring& text) const { - int width = 0, height = 0; - CanvasSkia::SizeStringInt(text, *this, &width, &height, - gfx::Canvas::NO_ELLIPSIS); - return width; -} - -Font::HFontRef* Font::CreateHFontRef(HFONT font) { - TEXTMETRIC font_metrics; - HDC screen_dc = GetDC(NULL); - HFONT previous_font = static_cast<HFONT>(SelectObject(screen_dc, font)); - int last_map_mode = SetMapMode(screen_dc, MM_TEXT); - GetTextMetrics(screen_dc, &font_metrics); - // Yes, this is how Microsoft recommends calculating the dialog unit - // conversions. - SIZE ave_text_size; - GetTextExtentPoint32(screen_dc, - L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", - 52, &ave_text_size); - const int dlu_base_x = (ave_text_size.cx / 26 + 1) / 2; - // To avoid the DC referencing font_handle_, select the previous font. - SelectObject(screen_dc, previous_font); - SetMapMode(screen_dc, last_map_mode); - ReleaseDC(NULL, screen_dc); - - const int height = std::max(1, static_cast<int>(font_metrics.tmHeight)); - const int baseline = std::max(1, static_cast<int>(font_metrics.tmAscent)); - const int ave_char_width = - std::max(1, static_cast<int>(font_metrics.tmAveCharWidth)); - int style = 0; - if (font_metrics.tmItalic) { - style |= Font::ITALIC; - } - if (font_metrics.tmUnderlined) { - style |= Font::UNDERLINED; - } - if (font_metrics.tmWeight >= kTextMetricWeightBold) { - style |= Font::BOLD; - } - - return new HFontRef(font, height, baseline, ave_char_width, style, - dlu_base_x); -} - -} // namespace gfx |