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// Copyright 2016 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 "core/fpdfapi/render/cpdf_devicebuffer.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fpdfapi/render/cpdf_rendercontext.h"
#include "core/fpdfapi/render/cpdf_renderoptions.h"
#include "core/fxge/cfx_fxgedevice.h"
#include "core/fxge/cfx_renderdevice.h"
#include "core/fxge/fx_dib.h"
#include "third_party/base/ptr_util.h"
CPDF_DeviceBuffer::CPDF_DeviceBuffer()
: m_pDevice(nullptr), m_pContext(nullptr), m_pObject(nullptr) {}
CPDF_DeviceBuffer::~CPDF_DeviceBuffer() {}
bool CPDF_DeviceBuffer::Initialize(CPDF_RenderContext* pContext,
CFX_RenderDevice* pDevice,
FX_RECT* pRect,
const CPDF_PageObject* pObj,
int max_dpi) {
m_pDevice = pDevice;
m_pContext = pContext;
m_Rect = *pRect;
m_pObject = pObj;
m_Matrix.Translate(-pRect->left, -pRect->top);
#if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_
int horz_size = pDevice->GetDeviceCaps(FXDC_HORZ_SIZE);
int vert_size = pDevice->GetDeviceCaps(FXDC_VERT_SIZE);
if (horz_size && vert_size && max_dpi) {
int dpih =
pDevice->GetDeviceCaps(FXDC_PIXEL_WIDTH) * 254 / (horz_size * 10);
int dpiv =
pDevice->GetDeviceCaps(FXDC_PIXEL_HEIGHT) * 254 / (vert_size * 10);
if (dpih > max_dpi)
m_Matrix.Scale((FX_FLOAT)(max_dpi) / dpih, 1.0f);
if (dpiv > max_dpi)
m_Matrix.Scale(1.0f, (FX_FLOAT)(max_dpi) / (FX_FLOAT)dpiv);
}
#endif
CFX_Matrix ctm = m_pDevice->GetCTM();
m_Matrix.Concat(CFX_Matrix(FXSYS_fabs(ctm.a), 0, 0, FXSYS_fabs(ctm.d), 0, 0));
CFX_FloatRect rect(*pRect);
m_Matrix.TransformRect(rect);
FX_RECT bitmap_rect = rect.GetOuterRect();
m_pBitmap = pdfium::MakeUnique<CFX_DIBitmap>();
m_pBitmap->Create(bitmap_rect.Width(), bitmap_rect.Height(), FXDIB_Argb);
return true;
}
void CPDF_DeviceBuffer::OutputToDevice() {
if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_GET_BITS) {
if (m_Matrix.a == 1.0f && m_Matrix.d == 1.0f) {
m_pDevice->SetDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top);
} else {
m_pDevice->StretchDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top,
m_Rect.Width(), m_Rect.Height());
}
return;
}
CFX_DIBitmap buffer;
m_pDevice->CreateCompatibleBitmap(&buffer, m_pBitmap->GetWidth(),
m_pBitmap->GetHeight());
m_pContext->GetBackground(&buffer, m_pObject, nullptr, &m_Matrix);
buffer.CompositeBitmap(0, 0, buffer.GetWidth(), buffer.GetHeight(),
m_pBitmap.get(), 0, 0);
m_pDevice->StretchDIBits(&buffer, m_Rect.left, m_Rect.top, m_Rect.Width(),
m_Rect.Height());
}
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