diff options
Diffstat (limited to 'core/fxge/dib/cfx_bitmapcomposer.cpp')
| -rw-r--r-- | core/fxge/dib/cfx_bitmapcomposer.cpp | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/core/fxge/dib/cfx_bitmapcomposer.cpp b/core/fxge/dib/cfx_bitmapcomposer.cpp new file mode 100644 index 0000000000..7124ba9d46 --- /dev/null +++ b/core/fxge/dib/cfx_bitmapcomposer.cpp @@ -0,0 +1,216 @@ +// Copyright 2017 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/dib/cfx_bitmapcomposer.h" + +#include "core/fxcodec/fx_codec.h" +#include "core/fxge/cfx_gemodule.h" +#include "core/fxge/dib/cfx_dibitmap.h" +#include "core/fxge/ge/cfx_cliprgn.h" + +CFX_BitmapComposer::CFX_BitmapComposer() { + m_pScanlineV = nullptr; + m_pScanlineAlphaV = nullptr; + m_pClipScanV = nullptr; + m_pAddClipScan = nullptr; + m_bRgbByteOrder = false; + m_BlendType = FXDIB_BLEND_NORMAL; +} + +CFX_BitmapComposer::~CFX_BitmapComposer() { + FX_Free(m_pScanlineV); + FX_Free(m_pScanlineAlphaV); + FX_Free(m_pClipScanV); + FX_Free(m_pAddClipScan); +} + +void CFX_BitmapComposer::Compose(const CFX_RetainPtr<CFX_DIBitmap>& pDest, + const CFX_ClipRgn* pClipRgn, + int bitmap_alpha, + uint32_t mask_color, + FX_RECT& dest_rect, + bool bVertical, + bool bFlipX, + bool bFlipY, + bool bRgbByteOrder, + int alpha_flag, + void* pIccTransform, + int blend_type) { + m_pBitmap = pDest; + m_pClipRgn = pClipRgn; + m_DestLeft = dest_rect.left; + m_DestTop = dest_rect.top; + m_DestWidth = dest_rect.Width(); + m_DestHeight = dest_rect.Height(); + m_BitmapAlpha = bitmap_alpha; + m_MaskColor = mask_color; + m_pClipMask = nullptr; + if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI) + m_pClipMask = pClipRgn->GetMask(); + m_bVertical = bVertical; + m_bFlipX = bFlipX; + m_bFlipY = bFlipY; + m_AlphaFlag = alpha_flag; + m_pIccTransform = pIccTransform; + m_bRgbByteOrder = bRgbByteOrder; + m_BlendType = blend_type; +} +bool CFX_BitmapComposer::SetInfo(int width, + int height, + FXDIB_Format src_format, + uint32_t* pSrcPalette) { + m_SrcFormat = src_format; + if (!m_Compositor.Init(m_pBitmap->GetFormat(), src_format, width, pSrcPalette, + m_MaskColor, FXDIB_BLEND_NORMAL, + m_pClipMask != nullptr || (m_BitmapAlpha < 255), + m_bRgbByteOrder, m_AlphaFlag, m_pIccTransform)) { + return false; + } + if (m_bVertical) { + m_pScanlineV = FX_Alloc(uint8_t, m_pBitmap->GetBPP() / 8 * width + 4); + m_pClipScanV = FX_Alloc(uint8_t, m_pBitmap->GetHeight()); + if (m_pBitmap->m_pAlphaMask) { + m_pScanlineAlphaV = FX_Alloc(uint8_t, width + 4); + } + } + if (m_BitmapAlpha < 255) { + m_pAddClipScan = FX_Alloc( + uint8_t, m_bVertical ? m_pBitmap->GetHeight() : m_pBitmap->GetWidth()); + } + return true; +} + +void CFX_BitmapComposer::DoCompose(uint8_t* dest_scan, + const uint8_t* src_scan, + int dest_width, + const uint8_t* clip_scan, + const uint8_t* src_extra_alpha, + uint8_t* dst_extra_alpha) { + if (m_BitmapAlpha < 255) { + if (clip_scan) { + for (int i = 0; i < dest_width; i++) { + m_pAddClipScan[i] = clip_scan[i] * m_BitmapAlpha / 255; + } + } else { + FXSYS_memset(m_pAddClipScan, m_BitmapAlpha, dest_width); + } + clip_scan = m_pAddClipScan; + } + if (m_SrcFormat == FXDIB_8bppMask) { + m_Compositor.CompositeByteMaskLine(dest_scan, src_scan, dest_width, + clip_scan, dst_extra_alpha); + } else if ((m_SrcFormat & 0xff) == 8) { + m_Compositor.CompositePalBitmapLine(dest_scan, src_scan, 0, dest_width, + clip_scan, src_extra_alpha, + dst_extra_alpha); + } else { + m_Compositor.CompositeRgbBitmapLine(dest_scan, src_scan, dest_width, + clip_scan, src_extra_alpha, + dst_extra_alpha); + } +} + +void CFX_BitmapComposer::ComposeScanline(int line, + const uint8_t* scanline, + const uint8_t* scan_extra_alpha) { + if (m_bVertical) { + ComposeScanlineV(line, scanline, scan_extra_alpha); + return; + } + const uint8_t* clip_scan = nullptr; + if (m_pClipMask) + clip_scan = m_pClipMask->GetBuffer() + + (m_DestTop + line - m_pClipRgn->GetBox().top) * + m_pClipMask->GetPitch() + + (m_DestLeft - m_pClipRgn->GetBox().left); + uint8_t* dest_scan = (uint8_t*)m_pBitmap->GetScanline(line + m_DestTop) + + m_DestLeft * m_pBitmap->GetBPP() / 8; + uint8_t* dest_alpha_scan = + m_pBitmap->m_pAlphaMask + ? (uint8_t*)m_pBitmap->m_pAlphaMask->GetScanline(line + m_DestTop) + + m_DestLeft + : nullptr; + DoCompose(dest_scan, scanline, m_DestWidth, clip_scan, scan_extra_alpha, + dest_alpha_scan); +} + +void CFX_BitmapComposer::ComposeScanlineV(int line, + const uint8_t* scanline, + const uint8_t* scan_extra_alpha) { + int i; + int Bpp = m_pBitmap->GetBPP() / 8; + int dest_pitch = m_pBitmap->GetPitch(); + int dest_alpha_pitch = + m_pBitmap->m_pAlphaMask ? m_pBitmap->m_pAlphaMask->GetPitch() : 0; + int dest_x = m_DestLeft + (m_bFlipX ? (m_DestWidth - line - 1) : line); + uint8_t* dest_buf = + m_pBitmap->GetBuffer() + dest_x * Bpp + m_DestTop * dest_pitch; + uint8_t* dest_alpha_buf = m_pBitmap->m_pAlphaMask + ? m_pBitmap->m_pAlphaMask->GetBuffer() + + dest_x + m_DestTop * dest_alpha_pitch + : nullptr; + if (m_bFlipY) { + dest_buf += dest_pitch * (m_DestHeight - 1); + dest_alpha_buf += dest_alpha_pitch * (m_DestHeight - 1); + } + int y_step = dest_pitch; + int y_alpha_step = dest_alpha_pitch; + if (m_bFlipY) { + y_step = -y_step; + y_alpha_step = -y_alpha_step; + } + uint8_t* src_scan = m_pScanlineV; + uint8_t* dest_scan = dest_buf; + for (i = 0; i < m_DestHeight; i++) { + for (int j = 0; j < Bpp; j++) { + *src_scan++ = dest_scan[j]; + } + dest_scan += y_step; + } + uint8_t* src_alpha_scan = m_pScanlineAlphaV; + uint8_t* dest_alpha_scan = dest_alpha_buf; + if (dest_alpha_scan) { + for (i = 0; i < m_DestHeight; i++) { + *src_alpha_scan++ = *dest_alpha_scan; + dest_alpha_scan += y_alpha_step; + } + } + uint8_t* clip_scan = nullptr; + if (m_pClipMask) { + clip_scan = m_pClipScanV; + int clip_pitch = m_pClipMask->GetPitch(); + const uint8_t* src_clip = + m_pClipMask->GetBuffer() + + (m_DestTop - m_pClipRgn->GetBox().top) * clip_pitch + + (dest_x - m_pClipRgn->GetBox().left); + if (m_bFlipY) { + src_clip += clip_pitch * (m_DestHeight - 1); + clip_pitch = -clip_pitch; + } + for (i = 0; i < m_DestHeight; i++) { + clip_scan[i] = *src_clip; + src_clip += clip_pitch; + } + } + DoCompose(m_pScanlineV, scanline, m_DestHeight, clip_scan, scan_extra_alpha, + m_pScanlineAlphaV); + src_scan = m_pScanlineV; + dest_scan = dest_buf; + for (i = 0; i < m_DestHeight; i++) { + for (int j = 0; j < Bpp; j++) { + dest_scan[j] = *src_scan++; + } + dest_scan += y_step; + } + src_alpha_scan = m_pScanlineAlphaV; + dest_alpha_scan = dest_alpha_buf; + if (dest_alpha_scan) { + for (i = 0; i < m_DestHeight; i++) { + *dest_alpha_scan = *src_alpha_scan++; + dest_alpha_scan += y_alpha_step; + } + } +} |