1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "core/fpdfapi/render/cpdf_devicebuffer.h" 8 9 #include "core/fpdfapi/page/cpdf_pageobject.h" 10 #include "core/fpdfapi/render/cpdf_rendercontext.h" 11 #include "core/fpdfapi/render/cpdf_renderoptions.h" 12 #include "core/fxge/cfx_fxgedevice.h" 13 #include "core/fxge/cfx_renderdevice.h" 14 #include "core/fxge/fx_dib.h" 15 #include "third_party/base/ptr_util.h" 16 17 CPDF_DeviceBuffer::CPDF_DeviceBuffer() 18 : m_pDevice(nullptr), m_pContext(nullptr), m_pObject(nullptr) {} 19 20 CPDF_DeviceBuffer::~CPDF_DeviceBuffer() {} 21 22 bool CPDF_DeviceBuffer::Initialize(CPDF_RenderContext* pContext, 23 CFX_RenderDevice* pDevice, 24 FX_RECT* pRect, 25 const CPDF_PageObject* pObj, 26 int max_dpi) { 27 m_pDevice = pDevice; 28 m_pContext = pContext; 29 m_Rect = *pRect; 30 m_pObject = pObj; 31 m_Matrix.Translate(-pRect->left, -pRect->top); 32 #if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_ 33 int horz_size = pDevice->GetDeviceCaps(FXDC_HORZ_SIZE); 34 int vert_size = pDevice->GetDeviceCaps(FXDC_VERT_SIZE); 35 if (horz_size && vert_size && max_dpi) { 36 int dpih = 37 pDevice->GetDeviceCaps(FXDC_PIXEL_WIDTH) * 254 / (horz_size * 10); 38 int dpiv = 39 pDevice->GetDeviceCaps(FXDC_PIXEL_HEIGHT) * 254 / (vert_size * 10); 40 if (dpih > max_dpi) 41 m_Matrix.Scale((FX_FLOAT)(max_dpi) / dpih, 1.0f); 42 if (dpiv > max_dpi) 43 m_Matrix.Scale(1.0f, (FX_FLOAT)(max_dpi) / (FX_FLOAT)dpiv); 44 } 45 #endif 46 CFX_Matrix ctm = m_pDevice->GetCTM(); 47 m_Matrix.Concat(CFX_Matrix(FXSYS_fabs(ctm.a), 0, 0, FXSYS_fabs(ctm.d), 0, 0)); 48 49 CFX_FloatRect rect(*pRect); 50 m_Matrix.TransformRect(rect); 51 52 FX_RECT bitmap_rect = rect.GetOuterRect(); 53 m_pBitmap = pdfium::MakeUnique<CFX_DIBitmap>(); 54 m_pBitmap->Create(bitmap_rect.Width(), bitmap_rect.Height(), FXDIB_Argb); 55 return true; 56 } 57 58 void CPDF_DeviceBuffer::OutputToDevice() { 59 if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_GET_BITS) { 60 if (m_Matrix.a == 1.0f && m_Matrix.d == 1.0f) { 61 m_pDevice->SetDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top); 62 } else { 63 m_pDevice->StretchDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top, 64 m_Rect.Width(), m_Rect.Height()); 65 } 66 return; 67 } 68 CFX_DIBitmap buffer; 69 m_pDevice->CreateCompatibleBitmap(&buffer, m_pBitmap->GetWidth(), 70 m_pBitmap->GetHeight()); 71 m_pContext->GetBackground(&buffer, m_pObject, nullptr, &m_Matrix); 72 buffer.CompositeBitmap(0, 0, buffer.GetWidth(), buffer.GetHeight(), 73 m_pBitmap.get(), 0, 0); 74 m_pDevice->StretchDIBits(&buffer, m_Rect.left, m_Rect.top, m_Rect.Width(), 75 m_Rect.Height()); 76 } 77
