diff options
Diffstat (limited to 'core/fxge/dib/fx_dib_engine.cpp')
| -rw-r--r-- | core/fxge/dib/fx_dib_engine.cpp | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/core/fxge/dib/fx_dib_engine.cpp b/core/fxge/dib/fx_dib_engine.cpp index 7aa710b795..d304a56600 100644 --- a/core/fxge/dib/fx_dib_engine.cpp +++ b/core/fxge/dib/fx_dib_engine.cpp @@ -13,26 +13,6 @@ #include "third_party/base/ptr_util.h" #include "third_party/base/stl_util.h" -namespace { - -bool SourceSizeWithinLimit(int width, int height) { - const int kMaxProgressiveStretchPixels = 1000000; - return !height || width < kMaxProgressiveStretchPixels / height; -} - -FXDIB_Format GetStretchedFormat(const CFX_DIBSource& src) { - FXDIB_Format format = src.GetFormat(); - if (format == FXDIB_1bppMask) - return FXDIB_8bppMask; - if (format == FXDIB_1bppRgb) - return FXDIB_8bppRgb; - if (format == FXDIB_8bppRgb && src.GetPalette()) - return FXDIB_Rgb; - return format; -} - -} // namespace - CWeightTable::CWeightTable() : m_DestMin(0), m_ItemSize(0), @@ -851,155 +831,3 @@ void CStretchEngine::StretchVert() { m_pDestMaskScanline); } } - -CFX_ImageStretcher::CFX_ImageStretcher( - IFX_ScanlineComposer* pDest, - const CFX_RetainPtr<CFX_DIBSource>& pSource, - int dest_width, - int dest_height, - const FX_RECT& bitmap_rect, - uint32_t flags) - : m_pDest(pDest), - m_pSource(pSource), - m_Flags(flags), - m_bFlipX(false), - m_bFlipY(false), - m_DestWidth(dest_width), - m_DestHeight(dest_height), - m_ClipRect(bitmap_rect), - m_DestFormat(GetStretchedFormat(*pSource)), - m_DestBPP(m_DestFormat & 0xff), - m_LineIndex(0) {} - -CFX_ImageStretcher::~CFX_ImageStretcher() { -} - -bool CFX_ImageStretcher::Start() { - if (m_DestWidth == 0 || m_DestHeight == 0) - return false; - - if (m_pSource->GetFormat() == FXDIB_1bppRgb && m_pSource->GetPalette()) { - FX_ARGB pal[256]; - int a0, r0, g0, b0, a1, r1, g1, b1; - ArgbDecode(m_pSource->GetPaletteEntry(0), a0, r0, g0, b0); - ArgbDecode(m_pSource->GetPaletteEntry(1), a1, r1, g1, b1); - for (int i = 0; i < 256; i++) { - int a = a0 + (a1 - a0) * i / 255; - int r = r0 + (r1 - r0) * i / 255; - int g = g0 + (g1 - g0) * i / 255; - int b = b0 + (b1 - b0) * i / 255; - pal[i] = ArgbEncode(a, r, g, b); - } - if (!m_pDest->SetInfo(m_ClipRect.Width(), m_ClipRect.Height(), m_DestFormat, - pal)) { - return false; - } - } else if (m_pSource->GetFormat() == FXDIB_1bppCmyk && - m_pSource->GetPalette()) { - FX_CMYK pal[256]; - int c0, m0, y0, k0, c1, m1, y1, k1; - CmykDecode(m_pSource->GetPaletteEntry(0), c0, m0, y0, k0); - CmykDecode(m_pSource->GetPaletteEntry(1), c1, m1, y1, k1); - for (int i = 0; i < 256; i++) { - int c = c0 + (c1 - c0) * i / 255; - int m = m0 + (m1 - m0) * i / 255; - int y = y0 + (y1 - y0) * i / 255; - int k = k0 + (k1 - k0) * i / 255; - pal[i] = CmykEncode(c, m, y, k); - } - if (!m_pDest->SetInfo(m_ClipRect.Width(), m_ClipRect.Height(), m_DestFormat, - pal)) { - return false; - } - } else if (!m_pDest->SetInfo(m_ClipRect.Width(), m_ClipRect.Height(), - m_DestFormat, nullptr)) { - return false; - } - - if (m_Flags & FXDIB_DOWNSAMPLE) - return StartQuickStretch(); - return StartStretch(); -} - -bool CFX_ImageStretcher::Continue(IFX_Pause* pPause) { - if (m_Flags & FXDIB_DOWNSAMPLE) - return ContinueQuickStretch(pPause); - return ContinueStretch(pPause); -} - -bool CFX_ImageStretcher::StartStretch() { - m_pStretchEngine = pdfium::MakeUnique<CStretchEngine>( - m_pDest, m_DestFormat, m_DestWidth, m_DestHeight, m_ClipRect, m_pSource, - m_Flags); - m_pStretchEngine->StartStretchHorz(); - if (SourceSizeWithinLimit(m_pSource->GetWidth(), m_pSource->GetHeight())) { - m_pStretchEngine->Continue(nullptr); - return false; - } - return true; -} - -bool CFX_ImageStretcher::ContinueStretch(IFX_Pause* pPause) { - return m_pStretchEngine && m_pStretchEngine->Continue(pPause); -} - -bool CFX_ImageStretcher::StartQuickStretch() { - if (m_DestWidth < 0) { - m_bFlipX = true; - m_DestWidth = -m_DestWidth; - } - if (m_DestHeight < 0) { - m_bFlipY = true; - m_DestHeight = -m_DestHeight; - } - uint32_t size = m_ClipRect.Width(); - if (size && m_DestBPP > (int)(INT_MAX / size)) { - return false; - } - size *= m_DestBPP; - m_pScanline.reset(FX_Alloc(uint8_t, (size / 8 + 3) / 4 * 4)); - if (m_pSource->m_pAlphaMask) - m_pMaskScanline.reset(FX_Alloc(uint8_t, (m_ClipRect.Width() + 3) / 4 * 4)); - - if (SourceSizeWithinLimit(m_pSource->GetWidth(), m_pSource->GetHeight())) { - ContinueQuickStretch(nullptr); - return false; - } - return true; -} - -bool CFX_ImageStretcher::ContinueQuickStretch(IFX_Pause* pPause) { - if (!m_pScanline) - return false; - - int result_width = m_ClipRect.Width(); - int result_height = m_ClipRect.Height(); - int src_height = m_pSource->GetHeight(); - for (; m_LineIndex < result_height; m_LineIndex++) { - int dest_y; - int src_y; - if (m_bFlipY) { - dest_y = result_height - m_LineIndex - 1; - src_y = (m_DestHeight - (dest_y + m_ClipRect.top) - 1) * src_height / - m_DestHeight; - } else { - dest_y = m_LineIndex; - src_y = (dest_y + m_ClipRect.top) * src_height / m_DestHeight; - } - src_y = pdfium::clamp(src_y, 0, src_height - 1); - - if (m_pSource->SkipToScanline(src_y, pPause)) - return true; - - m_pSource->DownSampleScanline(src_y, m_pScanline.get(), m_DestBPP, - m_DestWidth, m_bFlipX, m_ClipRect.left, - result_width); - if (m_pMaskScanline) { - m_pSource->m_pAlphaMask->DownSampleScanline( - src_y, m_pMaskScanline.get(), 1, m_DestWidth, m_bFlipX, - m_ClipRect.left, result_width); - } - m_pDest->ComposeScanline(dest_y, m_pScanline.get(), m_pMaskScanline.get()); - } - return false; -} |