diff options
Diffstat (limited to 'core/fpdfapi/fpdf_render/fpdf_render_text.cpp')
-rw-r--r-- | core/fpdfapi/fpdf_render/fpdf_render_text.cpp | 195 |
1 files changed, 1 insertions, 194 deletions
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_text.cpp b/core/fpdfapi/fpdf_render/fpdf_render_text.cpp index e5e28b429c..ed254c17be 100644 --- a/core/fpdfapi/fpdf_render/fpdf_render_text.cpp +++ b/core/fpdfapi/fpdf_render/fpdf_render_text.cpp @@ -20,6 +20,7 @@ #include "core/fpdfapi/fpdf_page/pageint.h" #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h" #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h" +#include "core/fpdfapi/fpdf_render/cpdf_type3cache.h" #include "core/fpdfapi/fpdf_render/include/cpdf_renderoptions.h" #include "core/fpdfapi/fpdf_render/include/cpdf_textrenderer.h" #include "core/fxge/include/cfx_autofontcache.h" @@ -31,200 +32,6 @@ #include "core/fxge/include/cfx_pathdata.h" #include "core/fxge/include/cfx_renderdevice.h" -namespace { - -struct CPDF_UniqueKeyGen { - void Generate(int count, ...); - FX_CHAR m_Key[128]; - int m_KeyLen; -}; - -void CPDF_UniqueKeyGen::Generate(int count, ...) { - va_list argList; - va_start(argList, count); - for (int i = 0; i < count; i++) { - int p = va_arg(argList, int); - ((uint32_t*)m_Key)[i] = p; - } - va_end(argList); - m_KeyLen = count * sizeof(uint32_t); -} - -} // namespace - -CPDF_Type3Cache::CPDF_Type3Cache(CPDF_Type3Font* pFont) : m_pFont(pFont) {} - -CPDF_Type3Cache::~CPDF_Type3Cache() { - for (const auto& pair : m_SizeMap) { - delete pair.second; - } - m_SizeMap.clear(); -} - -CFX_GlyphBitmap* CPDF_Type3Cache::LoadGlyph(uint32_t charcode, - const CFX_Matrix* pMatrix, - FX_FLOAT retinaScaleX, - FX_FLOAT retinaScaleY) { - CPDF_UniqueKeyGen keygen; - keygen.Generate( - 4, FXSYS_round(pMatrix->a * 10000), FXSYS_round(pMatrix->b * 10000), - FXSYS_round(pMatrix->c * 10000), FXSYS_round(pMatrix->d * 10000)); - CFX_ByteString FaceGlyphsKey(keygen.m_Key, keygen.m_KeyLen); - CPDF_Type3Glyphs* pSizeCache; - auto it = m_SizeMap.find(FaceGlyphsKey); - if (it == m_SizeMap.end()) { - pSizeCache = new CPDF_Type3Glyphs; - m_SizeMap[FaceGlyphsKey] = pSizeCache; - } else { - pSizeCache = it->second; - } - auto it2 = pSizeCache->m_GlyphMap.find(charcode); - if (it2 != pSizeCache->m_GlyphMap.end()) - return it2->second; - - CFX_GlyphBitmap* pGlyphBitmap = - RenderGlyph(pSizeCache, charcode, pMatrix, retinaScaleX, retinaScaleY); - pSizeCache->m_GlyphMap[charcode] = pGlyphBitmap; - return pGlyphBitmap; -} - -CPDF_Type3Glyphs::CPDF_Type3Glyphs() - : m_TopBlueCount(0), m_BottomBlueCount(0) {} - -CPDF_Type3Glyphs::~CPDF_Type3Glyphs() { - for (const auto& pair : m_GlyphMap) - delete pair.second; -} - -static int _AdjustBlue(FX_FLOAT pos, int& count, int blues[]) { - FX_FLOAT min_distance = 1000000.0f * 1.0f; - int closest_pos = -1; - for (int i = 0; i < count; i++) { - FX_FLOAT distance = (FX_FLOAT)FXSYS_fabs(pos - (FX_FLOAT)blues[i]); - if (distance < 1.0f * 80.0f / 100.0f && distance < min_distance) { - min_distance = distance; - closest_pos = i; - } - } - if (closest_pos >= 0) { - return blues[closest_pos]; - } - int new_pos = FXSYS_round(pos); - if (count == TYPE3_MAX_BLUES) { - return new_pos; - } - blues[count++] = new_pos; - return new_pos; -} -void CPDF_Type3Glyphs::AdjustBlue(FX_FLOAT top, - FX_FLOAT bottom, - int& top_line, - int& bottom_line) { - top_line = _AdjustBlue(top, m_TopBlueCount, m_TopBlue); - bottom_line = _AdjustBlue(bottom, m_BottomBlueCount, m_BottomBlue); -} - -static FX_BOOL _IsScanLine1bpp(uint8_t* pBuf, int width) { - int size = width / 8; - for (int i = 0; i < size; i++) { - if (pBuf[i]) - return TRUE; - } - return (width % 8) && (pBuf[width / 8] & (0xff << (8 - width % 8))); -} - -static FX_BOOL _IsScanLine8bpp(uint8_t* pBuf, int width) { - for (int i = 0; i < width; i++) { - if (pBuf[i] > 0x40) - return TRUE; - } - return FALSE; -} - -static int _DetectFirstLastScan(const CFX_DIBitmap* pBitmap, FX_BOOL bFirst) { - int height = pBitmap->GetHeight(), pitch = pBitmap->GetPitch(), - width = pBitmap->GetWidth(); - int bpp = pBitmap->GetBPP(); - if (bpp > 8) { - width *= bpp / 8; - } - uint8_t* pBuf = pBitmap->GetBuffer(); - int line = bFirst ? 0 : height - 1; - int line_step = bFirst ? 1 : -1; - int line_end = bFirst ? height : -1; - while (line != line_end) { - if (bpp == 1) { - if (_IsScanLine1bpp(pBuf + line * pitch, width)) { - return line; - } - } else { - if (_IsScanLine8bpp(pBuf + line * pitch, width)) { - return line; - } - } - line += line_step; - } - return -1; -} - -CFX_GlyphBitmap* CPDF_Type3Cache::RenderGlyph(CPDF_Type3Glyphs* pSize, - uint32_t charcode, - const CFX_Matrix* pMatrix, - FX_FLOAT retinaScaleX, - FX_FLOAT retinaScaleY) { - const CPDF_Type3Char* pChar = m_pFont->LoadChar(charcode); - if (!pChar || !pChar->m_pBitmap) - return nullptr; - - CFX_DIBitmap* pBitmap = pChar->m_pBitmap.get(); - CFX_Matrix image_matrix, text_matrix; - image_matrix = pChar->m_ImageMatrix; - text_matrix.Set(pMatrix->a, pMatrix->b, pMatrix->c, pMatrix->d, 0, 0); - image_matrix.Concat(text_matrix); - std::unique_ptr<CFX_DIBitmap> pResBitmap; - int left = 0; - int top = 0; - if (FXSYS_fabs(image_matrix.b) < FXSYS_fabs(image_matrix.a) / 100 && - FXSYS_fabs(image_matrix.c) < FXSYS_fabs(image_matrix.d) / 100) { - int top_line = _DetectFirstLastScan(pBitmap, TRUE); - int bottom_line = _DetectFirstLastScan(pBitmap, FALSE); - if (top_line == 0 && bottom_line == pBitmap->GetHeight() - 1) { - FX_FLOAT top_y = image_matrix.d + image_matrix.f; - FX_FLOAT bottom_y = image_matrix.f; - FX_BOOL bFlipped = top_y > bottom_y; - if (bFlipped) { - FX_FLOAT temp = top_y; - top_y = bottom_y; - bottom_y = temp; - } - pSize->AdjustBlue(top_y, bottom_y, top_line, bottom_line); - pResBitmap.reset(pBitmap->StretchTo( - (int)(FXSYS_round(image_matrix.a) * retinaScaleX), - (int)((bFlipped ? top_line - bottom_line : bottom_line - top_line) * - retinaScaleY))); - top = top_line; - if (image_matrix.a < 0) { - image_matrix.Scale(retinaScaleX, retinaScaleY); - left = FXSYS_round(image_matrix.e + image_matrix.a); - } else { - left = FXSYS_round(image_matrix.e); - } - } - } - if (!pResBitmap) { - image_matrix.Scale(retinaScaleX, retinaScaleY); - pResBitmap.reset(pBitmap->TransformTo(&image_matrix, left, top)); - } - if (!pResBitmap) - return nullptr; - - CFX_GlyphBitmap* pGlyph = new CFX_GlyphBitmap; - pGlyph->m_Left = left; - pGlyph->m_Top = -top; - pGlyph->m_Bitmap.TakeOver(pResBitmap.get()); - return pGlyph; -} - FX_BOOL CPDF_RenderStatus::ProcessText(const CPDF_TextObject* textobj, const CFX_Matrix* pObj2Device, CFX_PathData* pClippingPath) { |