| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include <algorithm> |
| #include <limits> |
| #include <vector> |
| |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxge/cfx_pathdata.h" |
| #include "core/fxge/fx_freetype.h" |
| #include "core/fxge/ifx_renderdevicedriver.h" |
| |
| namespace { |
| |
| void ResetTransform(FT_Face face) { |
| FXFT_Matrix matrix; |
| matrix.xx = 0x10000L; |
| matrix.xy = 0; |
| matrix.yx = 0; |
| matrix.yy = 0x10000L; |
| FXFT_Set_Transform(face, &matrix, 0); |
| } |
| |
| } // namespace |
| |
| FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS() : m_pGlyph(nullptr) {} |
| |
| FXTEXT_GLYPHPOS::FXTEXT_GLYPHPOS(const FXTEXT_GLYPHPOS&) = default; |
| |
| FXTEXT_GLYPHPOS::~FXTEXT_GLYPHPOS(){}; |
| |
| ScopedFontTransform::ScopedFontTransform(FT_Face face, FXFT_Matrix* matrix) |
| : m_Face(face) { |
| FXFT_Set_Transform(m_Face, matrix, 0); |
| } |
| |
| ScopedFontTransform::~ScopedFontTransform() { |
| ResetTransform(m_Face); |
| } |
| |
| FX_RECT FXGE_GetGlyphsBBox(const std::vector<FXTEXT_GLYPHPOS>& glyphs, |
| int anti_alias, |
| float retinaScaleX, |
| float retinaScaleY) { |
| FX_RECT rect(0, 0, 0, 0); |
| bool bStarted = false; |
| for (const FXTEXT_GLYPHPOS& glyph : glyphs) { |
| const CFX_GlyphBitmap* pGlyph = glyph.m_pGlyph; |
| if (!pGlyph) |
| continue; |
| |
| FX_SAFE_INT32 char_left = glyph.m_Origin.x; |
| char_left += pGlyph->m_Left; |
| if (!char_left.IsValid()) |
| continue; |
| |
| FX_SAFE_INT32 char_width = pGlyph->m_pBitmap->GetWidth(); |
| char_width /= retinaScaleX; |
| if (anti_alias == FXFT_RENDER_MODE_LCD) |
| char_width /= 3; |
| if (!char_width.IsValid()) |
| continue; |
| |
| FX_SAFE_INT32 char_right = char_left + char_width; |
| if (!char_right.IsValid()) |
| continue; |
| |
| FX_SAFE_INT32 char_top = glyph.m_Origin.y; |
| char_top -= pGlyph->m_Top; |
| if (!char_top.IsValid()) |
| continue; |
| |
| FX_SAFE_INT32 char_height = pGlyph->m_pBitmap->GetHeight(); |
| char_height /= retinaScaleY; |
| if (!char_height.IsValid()) |
| continue; |
| |
| FX_SAFE_INT32 char_bottom = char_top + char_height; |
| if (!char_bottom.IsValid()) |
| continue; |
| |
| if (bStarted) { |
| rect.left = pdfium::base::ValueOrDieForType<int32_t>( |
| pdfium::base::CheckMin(rect.left, char_left)); |
| rect.right = pdfium::base::ValueOrDieForType<int32_t>( |
| pdfium::base::CheckMax(rect.right, char_right)); |
| rect.top = pdfium::base::ValueOrDieForType<int32_t>( |
| pdfium::base::CheckMin(rect.top, char_top)); |
| rect.bottom = pdfium::base::ValueOrDieForType<int32_t>( |
| pdfium::base::CheckMax(rect.bottom, char_bottom)); |
| continue; |
| } |
| |
| rect.left = char_left.ValueOrDie(); |
| rect.right = char_right.ValueOrDie(); |
| rect.top = char_top.ValueOrDie(); |
| rect.bottom = char_bottom.ValueOrDie(); |
| bStarted = true; |
| } |
| return rect; |
| } |