| // Copyright 2020 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/fxge/win32/cgdi_display_driver.h" |
| |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/fx_system.h" |
| #include "core/fxge/dib/cfx_dibextractor.h" |
| #include "core/fxge/dib/cfx_dibitmap.h" |
| #include "core/fxge/render_defines.h" |
| #include "core/fxge/win32/cwin32_platform.h" |
| #include "third_party/base/check.h" |
| #include "third_party/base/check_op.h" |
| |
| CGdiDisplayDriver::CGdiDisplayDriver(HDC hDC) |
| : CGdiDeviceDriver(hDC, DeviceType::kDisplay) { |
| auto* pPlatform = |
| static_cast<CWin32Platform*>(CFX_GEModule::Get()->GetPlatform()); |
| if (pPlatform->m_GdiplusExt.IsAvailable()) { |
| m_RenderCaps |= FXRC_ALPHA_PATH | FXRC_ALPHA_IMAGE; |
| } |
| } |
| |
| CGdiDisplayDriver::~CGdiDisplayDriver() = default; |
| |
| int CGdiDisplayDriver::GetDeviceCaps(int caps_id) const { |
| if (caps_id == FXDC_HORZ_SIZE || caps_id == FXDC_VERT_SIZE) |
| return 0; |
| return CGdiDeviceDriver::GetDeviceCaps(caps_id); |
| } |
| |
| bool CGdiDisplayDriver::GetDIBits(const RetainPtr<CFX_DIBitmap>& pBitmap, |
| int left, |
| int top) { |
| bool ret = false; |
| int width = pBitmap->GetWidth(); |
| int height = pBitmap->GetHeight(); |
| HBITMAP hbmp = CreateCompatibleBitmap(m_hDC, width, height); |
| HDC hDCMemory = CreateCompatibleDC(m_hDC); |
| HBITMAP holdbmp = (HBITMAP)SelectObject(hDCMemory, hbmp); |
| BitBlt(hDCMemory, 0, 0, width, height, m_hDC, left, top, SRCCOPY); |
| SelectObject(hDCMemory, holdbmp); |
| BITMAPINFO bmi; |
| memset(&bmi, 0, sizeof bmi); |
| bmi.bmiHeader.biSize = sizeof bmi.bmiHeader; |
| bmi.bmiHeader.biBitCount = pBitmap->GetBPP(); |
| bmi.bmiHeader.biHeight = -height; |
| bmi.bmiHeader.biPlanes = 1; |
| bmi.bmiHeader.biWidth = width; |
| if (pBitmap->GetBPP() > 8) { |
| ret = ::GetDIBits(hDCMemory, hbmp, 0, height, pBitmap->GetBuffer(), &bmi, |
| DIB_RGB_COLORS) == height; |
| } else { |
| auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (bitmap->Create(width, height, FXDIB_Format::kRgb)) { |
| bmi.bmiHeader.biBitCount = 24; |
| ::GetDIBits(hDCMemory, hbmp, 0, height, bitmap->GetBuffer(), &bmi, |
| DIB_RGB_COLORS); |
| ret = pBitmap->TransferBitmap(0, 0, width, height, bitmap, 0, 0); |
| } else { |
| ret = false; |
| } |
| } |
| if (ret && pBitmap->IsAlphaFormat()) |
| pBitmap->SetUniformOpaqueAlpha(); |
| |
| DeleteObject(hbmp); |
| DeleteObject(hDCMemory); |
| return ret; |
| } |
| |
| bool CGdiDisplayDriver::SetDIBits(const RetainPtr<CFX_DIBBase>& pSource, |
| uint32_t color, |
| const FX_RECT& src_rect, |
| int left, |
| int top, |
| BlendMode blend_type) { |
| DCHECK_EQ(blend_type, BlendMode::kNormal); |
| if (pSource->IsMaskFormat()) { |
| int width = pSource->GetWidth(), height = pSource->GetHeight(); |
| int alpha = FXARGB_A(color); |
| if (pSource->GetBPP() != 1 || alpha != 255) { |
| auto background = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!background->Create(width, height, FXDIB_Format::kRgb32) || |
| !GetDIBits(background, left, top) || |
| !background->CompositeMask(0, 0, width, height, pSource, color, 0, 0, |
| BlendMode::kNormal, nullptr, false)) { |
| return false; |
| } |
| FX_RECT alpha_src_rect(0, 0, width, height); |
| return SetDIBits(background, 0, alpha_src_rect, left, top, |
| BlendMode::kNormal); |
| } |
| FX_RECT clip_rect(left, top, left + src_rect.Width(), |
| top + src_rect.Height()); |
| return StretchDIBits(pSource, color, left - src_rect.left, |
| top - src_rect.top, width, height, &clip_rect, |
| FXDIB_ResampleOptions(), BlendMode::kNormal); |
| } |
| int width = src_rect.Width(); |
| int height = src_rect.Height(); |
| if (pSource->IsAlphaFormat()) { |
| auto bitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!bitmap->Create(width, height, FXDIB_Format::kRgb) || |
| !GetDIBits(bitmap, left, top) || |
| !bitmap->CompositeBitmap(0, 0, width, height, pSource, src_rect.left, |
| src_rect.top, BlendMode::kNormal, nullptr, |
| false)) { |
| return false; |
| } |
| FX_RECT alpha_src_rect(0, 0, width, height); |
| return SetDIBits(bitmap, 0, alpha_src_rect, left, top, BlendMode::kNormal); |
| } |
| CFX_DIBExtractor temp(pSource); |
| RetainPtr<CFX_DIBitmap> pBitmap = temp.GetBitmap(); |
| if (!pBitmap) |
| return false; |
| return GDI_SetDIBits(pBitmap, src_rect, left, top); |
| } |
| |
| bool CGdiDisplayDriver::UseFoxitStretchEngine( |
| const RetainPtr<CFX_DIBBase>& pSource, |
| uint32_t color, |
| int dest_left, |
| int dest_top, |
| int dest_width, |
| int dest_height, |
| const FX_RECT* pClipRect, |
| const FXDIB_ResampleOptions& options) { |
| FX_RECT bitmap_clip = *pClipRect; |
| if (dest_width < 0) |
| dest_left += dest_width; |
| |
| if (dest_height < 0) |
| dest_top += dest_height; |
| |
| bitmap_clip.Offset(-dest_left, -dest_top); |
| RetainPtr<CFX_DIBitmap> pStretched = |
| pSource->StretchTo(dest_width, dest_height, options, &bitmap_clip); |
| if (!pStretched) |
| return true; |
| |
| FX_RECT src_rect(0, 0, pStretched->GetWidth(), pStretched->GetHeight()); |
| return SetDIBits(pStretched, color, src_rect, pClipRect->left, pClipRect->top, |
| BlendMode::kNormal); |
| } |
| |
| bool CGdiDisplayDriver::StretchDIBits(const RetainPtr<CFX_DIBBase>& pSource, |
| uint32_t color, |
| int dest_left, |
| int dest_top, |
| int dest_width, |
| int dest_height, |
| const FX_RECT* pClipRect, |
| const FXDIB_ResampleOptions& options, |
| BlendMode blend_type) { |
| DCHECK(pSource); |
| DCHECK(pClipRect); |
| |
| if (options.HasAnyOptions() || dest_width > 10000 || dest_width < -10000 || |
| dest_height > 10000 || dest_height < -10000) { |
| return UseFoxitStretchEngine(pSource, color, dest_left, dest_top, |
| dest_width, dest_height, pClipRect, options); |
| } |
| if (pSource->IsMaskFormat()) { |
| FX_RECT image_rect; |
| image_rect.left = dest_width > 0 ? dest_left : dest_left + dest_width; |
| image_rect.right = dest_width > 0 ? dest_left + dest_width : dest_left; |
| image_rect.top = dest_height > 0 ? dest_top : dest_top + dest_height; |
| image_rect.bottom = dest_height > 0 ? dest_top + dest_height : dest_top; |
| FX_RECT clip_rect = image_rect; |
| clip_rect.Intersect(*pClipRect); |
| clip_rect.Offset(-image_rect.left, -image_rect.top); |
| int clip_width = clip_rect.Width(), clip_height = clip_rect.Height(); |
| RetainPtr<CFX_DIBitmap> pStretched(pSource->StretchTo( |
| dest_width, dest_height, FXDIB_ResampleOptions(), &clip_rect)); |
| if (!pStretched) |
| return true; |
| |
| auto background = pdfium::MakeRetain<CFX_DIBitmap>(); |
| if (!background->Create(clip_width, clip_height, FXDIB_Format::kRgb32) || |
| !GetDIBits(background, image_rect.left + clip_rect.left, |
| image_rect.top + clip_rect.top) || |
| !background->CompositeMask(0, 0, clip_width, clip_height, pStretched, |
| color, 0, 0, BlendMode::kNormal, nullptr, |
| false)) { |
| return false; |
| } |
| |
| FX_RECT src_rect(0, 0, clip_width, clip_height); |
| return SetDIBits(background, 0, src_rect, image_rect.left + clip_rect.left, |
| image_rect.top + clip_rect.top, BlendMode::kNormal); |
| } |
| if (pSource->IsAlphaFormat()) { |
| auto* pPlatform = |
| static_cast<CWin32Platform*>(CFX_GEModule::Get()->GetPlatform()); |
| if (pPlatform->m_GdiplusExt.IsAvailable()) { |
| CFX_DIBExtractor temp(pSource); |
| RetainPtr<CFX_DIBitmap> pBitmap = temp.GetBitmap(); |
| if (!pBitmap) |
| return false; |
| return pPlatform->m_GdiplusExt.StretchDIBits( |
| m_hDC, pBitmap, dest_left, dest_top, dest_width, dest_height, |
| pClipRect, FXDIB_ResampleOptions()); |
| } |
| return UseFoxitStretchEngine(pSource, color, dest_left, dest_top, |
| dest_width, dest_height, pClipRect, |
| FXDIB_ResampleOptions()); |
| } |
| CFX_DIBExtractor temp(pSource); |
| RetainPtr<CFX_DIBitmap> pBitmap = temp.GetBitmap(); |
| if (!pBitmap) |
| return false; |
| return GDI_StretchDIBits(pBitmap, dest_left, dest_top, dest_width, |
| dest_height, FXDIB_ResampleOptions()); |
| } |
| |
| bool CGdiDisplayDriver::StartDIBits(const RetainPtr<CFX_DIBBase>& pBitmap, |
| int bitmap_alpha, |
| uint32_t color, |
| const CFX_Matrix& matrix, |
| const FXDIB_ResampleOptions& options, |
| std::unique_ptr<CFX_ImageRenderer>* handle, |
| BlendMode blend_type) { |
| return false; |
| } |