// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fpdfapi/render/cpdf_devicebuffer.h"
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#include "core/fpdfapi/page/cpdf_pageobject.h"
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#include "core/fpdfapi/render/cpdf_rendercontext.h"
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#include "core/fpdfapi/render/cpdf_renderoptions.h"
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#include "core/fxge/cfx_defaultrenderdevice.h"
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#include "core/fxge/cfx_renderdevice.h"
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#include "core/fxge/dib/cfx_dibitmap.h"
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#include "core/fxge/fx_dib.h"
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#include "third_party/base/ptr_util.h"
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CPDF_DeviceBuffer::CPDF_DeviceBuffer() {}
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CPDF_DeviceBuffer::~CPDF_DeviceBuffer() {}
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bool CPDF_DeviceBuffer::Initialize(CPDF_RenderContext* pContext,
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CFX_RenderDevice* pDevice,
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FX_RECT* pRect,
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const CPDF_PageObject* pObj,
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int max_dpi) {
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m_pDevice = pDevice;
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m_pContext = pContext;
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m_Rect = *pRect;
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m_pObject = pObj;
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m_Matrix.Translate(-pRect->left, -pRect->top);
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#if _FX_PLATFORM_ != _FX_PLATFORM_APPLE_
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int horz_size = pDevice->GetDeviceCaps(FXDC_HORZ_SIZE);
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int vert_size = pDevice->GetDeviceCaps(FXDC_VERT_SIZE);
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if (horz_size && vert_size && max_dpi) {
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int dpih =
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pDevice->GetDeviceCaps(FXDC_PIXEL_WIDTH) * 254 / (horz_size * 10);
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int dpiv =
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pDevice->GetDeviceCaps(FXDC_PIXEL_HEIGHT) * 254 / (vert_size * 10);
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if (dpih > max_dpi)
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m_Matrix.Scale((float)(max_dpi) / dpih, 1.0f);
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if (dpiv > max_dpi)
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m_Matrix.Scale(1.0f, (float)(max_dpi) / (float)dpiv);
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}
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#endif
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CFX_Matrix ctm = m_pDevice->GetCTM();
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m_Matrix.Concat(CFX_Matrix(fabs(ctm.a), 0, 0, fabs(ctm.d), 0, 0));
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FX_RECT bitmap_rect =
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m_Matrix.TransformRect(CFX_FloatRect(*pRect)).GetOuterRect();
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m_pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
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m_pBitmap->Create(bitmap_rect.Width(), bitmap_rect.Height(), FXDIB_Argb);
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return true;
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}
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void CPDF_DeviceBuffer::OutputToDevice() {
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if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_GET_BITS) {
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if (m_Matrix.a == 1.0f && m_Matrix.d == 1.0f) {
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m_pDevice->SetDIBits(m_pBitmap, m_Rect.left, m_Rect.top);
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} else {
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m_pDevice->StretchDIBits(m_pBitmap, m_Rect.left, m_Rect.top,
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m_Rect.Width(), m_Rect.Height());
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}
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return;
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}
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auto pBuffer = pdfium::MakeRetain<CFX_DIBitmap>();
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m_pDevice->CreateCompatibleBitmap(pBuffer, m_pBitmap->GetWidth(),
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m_pBitmap->GetHeight());
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m_pContext->GetBackground(pBuffer, m_pObject.Get(), nullptr, &m_Matrix);
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pBuffer->CompositeBitmap(0, 0, pBuffer->GetWidth(), pBuffer->GetHeight(),
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m_pBitmap, 0, 0);
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m_pDevice->StretchDIBits(pBuffer, m_Rect.left, m_Rect.top, m_Rect.Width(),
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m_Rect.Height());
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}
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