// 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_font.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; }