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authorNicolas Pena <npm@chromium.org>2017-03-31 10:22:11 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-03-31 16:40:20 +0000
commitfc715c3c1d9c9c623c36ae9fc8b8aac0362e4c22 (patch)
treebb4ec95d6531903196cecb3d215d9ca05f1b45db /core/fxge/dib/cfx_dibsource.cpp
parentc0cf369e0bd58ce5ae910d0b8636f6f23eca1490 (diff)
downloadpdfium-fc715c3c1d9c9c623c36ae9fc8b8aac0362e4c22.tar.xz
Split fx_dib part 1
Move CFX_DIBSource to its own file. Also move the classes that inherit from it to their own headers. Their cpp's will be added in followup. Change-Id: Id2b53e124ea5445c558bfcf627bf526870cc92e8 Reviewed-on: https://pdfium-review.googlesource.com/3450 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Nicolás Peña <npm@chromium.org>
Diffstat (limited to 'core/fxge/dib/cfx_dibsource.cpp')
-rw-r--r--core/fxge/dib/cfx_dibsource.cpp530
1 files changed, 530 insertions, 0 deletions
diff --git a/core/fxge/dib/cfx_dibsource.cpp b/core/fxge/dib/cfx_dibsource.cpp
new file mode 100644
index 0000000000..a3e5c30d5b
--- /dev/null
+++ b/core/fxge/dib/cfx_dibsource.cpp
@@ -0,0 +1,530 @@
+// 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_dibsource.h"
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "core/fxge/ge/cfx_cliprgn.h"
+#include "third_party/base/ptr_util.h"
+
+CFX_DIBSource::CFX_DIBSource()
+ : m_Width(0), m_Height(0), m_bpp(0), m_AlphaFlag(0), m_Pitch(0) {}
+
+CFX_DIBSource::~CFX_DIBSource() {}
+
+uint8_t* CFX_DIBSource::GetBuffer() const {
+ return nullptr;
+}
+
+bool CFX_DIBSource::SkipToScanline(int line, IFX_Pause* pPause) const {
+ return false;
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_DIBSource::Clone(const FX_RECT* pClip) const {
+ FX_RECT rect(0, 0, m_Width, m_Height);
+ if (pClip) {
+ rect.Intersect(*pClip);
+ if (rect.IsEmpty())
+ return nullptr;
+ }
+ auto pNewBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+ if (!pNewBitmap->Create(rect.Width(), rect.Height(), GetFormat()))
+ return nullptr;
+
+ pNewBitmap->SetPalette(m_pPalette.get());
+ pNewBitmap->SetAlphaMask(m_pAlphaMask, pClip);
+ if (GetBPP() == 1 && rect.left % 8 != 0) {
+ int left_shift = rect.left % 32;
+ int right_shift = 32 - left_shift;
+ int dword_count = pNewBitmap->m_Pitch / 4;
+ for (int row = rect.top; row < rect.bottom; row++) {
+ uint32_t* src_scan = (uint32_t*)GetScanline(row) + rect.left / 32;
+ uint32_t* dest_scan = (uint32_t*)pNewBitmap->GetScanline(row - rect.top);
+ for (int i = 0; i < dword_count; i++) {
+ dest_scan[i] =
+ (src_scan[i] << left_shift) | (src_scan[i + 1] >> right_shift);
+ }
+ }
+ } else {
+ int copy_len = (pNewBitmap->GetWidth() * pNewBitmap->GetBPP() + 7) / 8;
+ if (m_Pitch < (uint32_t)copy_len)
+ copy_len = m_Pitch;
+
+ for (int row = rect.top; row < rect.bottom; row++) {
+ const uint8_t* src_scan = GetScanline(row) + rect.left * m_bpp / 8;
+ uint8_t* dest_scan = (uint8_t*)pNewBitmap->GetScanline(row - rect.top);
+ FXSYS_memcpy(dest_scan, src_scan, copy_len);
+ }
+ }
+ return pNewBitmap;
+}
+
+void CFX_DIBSource::BuildPalette() {
+ if (m_pPalette)
+ return;
+
+ if (GetBPP() == 1) {
+ m_pPalette.reset(FX_Alloc(uint32_t, 2));
+ if (IsCmykImage()) {
+ m_pPalette.get()[0] = 0xff;
+ m_pPalette.get()[1] = 0;
+ } else {
+ m_pPalette.get()[0] = 0xff000000;
+ m_pPalette.get()[1] = 0xffffffff;
+ }
+ } else if (GetBPP() == 8) {
+ m_pPalette.reset(FX_Alloc(uint32_t, 256));
+ if (IsCmykImage()) {
+ for (int i = 0; i < 256; i++)
+ m_pPalette.get()[i] = 0xff - i;
+ } else {
+ for (int i = 0; i < 256; i++)
+ m_pPalette.get()[i] = 0xff000000 | (i * 0x10101);
+ }
+ }
+}
+
+bool CFX_DIBSource::BuildAlphaMask() {
+ if (m_pAlphaMask)
+ return true;
+
+ m_pAlphaMask = pdfium::MakeRetain<CFX_DIBitmap>();
+ if (!m_pAlphaMask->Create(m_Width, m_Height, FXDIB_8bppMask)) {
+ m_pAlphaMask = nullptr;
+ return false;
+ }
+ FXSYS_memset(m_pAlphaMask->GetBuffer(), 0xff,
+ m_pAlphaMask->GetHeight() * m_pAlphaMask->GetPitch());
+ return true;
+}
+
+uint32_t CFX_DIBSource::GetPaletteEntry(int index) const {
+ ASSERT((GetBPP() == 1 || GetBPP() == 8) && !IsAlphaMask());
+ if (m_pPalette) {
+ return m_pPalette.get()[index];
+ }
+ if (IsCmykImage()) {
+ if (GetBPP() == 1) {
+ return index ? 0 : 0xff;
+ }
+ return 0xff - index;
+ }
+ if (GetBPP() == 1) {
+ return index ? 0xffffffff : 0xff000000;
+ }
+ return index * 0x10101 | 0xff000000;
+}
+
+void CFX_DIBSource::SetPaletteEntry(int index, uint32_t color) {
+ ASSERT((GetBPP() == 1 || GetBPP() == 8) && !IsAlphaMask());
+ if (!m_pPalette) {
+ BuildPalette();
+ }
+ m_pPalette.get()[index] = color;
+}
+
+int CFX_DIBSource::FindPalette(uint32_t color) const {
+ ASSERT((GetBPP() == 1 || GetBPP() == 8) && !IsAlphaMask());
+ if (!m_pPalette) {
+ if (IsCmykImage()) {
+ if (GetBPP() == 1) {
+ return ((uint8_t)color == 0xff) ? 0 : 1;
+ }
+ return 0xff - (uint8_t)color;
+ }
+ if (GetBPP() == 1) {
+ return ((uint8_t)color == 0xff) ? 1 : 0;
+ }
+ return (uint8_t)color;
+ }
+ int palsize = (1 << GetBPP());
+ for (int i = 0; i < palsize; i++)
+ if (m_pPalette.get()[i] == color) {
+ return i;
+ }
+ return -1;
+}
+
+void CFX_DIBSource::GetOverlapRect(int& dest_left,
+ int& dest_top,
+ int& width,
+ int& height,
+ int src_width,
+ int src_height,
+ int& src_left,
+ int& src_top,
+ const CFX_ClipRgn* pClipRgn) {
+ if (width == 0 || height == 0) {
+ return;
+ }
+ ASSERT(width > 0 && height > 0);
+ if (dest_left > m_Width || dest_top > m_Height) {
+ width = 0;
+ height = 0;
+ return;
+ }
+ int x_offset = dest_left - src_left;
+ int y_offset = dest_top - src_top;
+ FX_RECT src_rect(src_left, src_top, src_left + width, src_top + height);
+ FX_RECT src_bound(0, 0, src_width, src_height);
+ src_rect.Intersect(src_bound);
+ FX_RECT dest_rect(src_rect.left + x_offset, src_rect.top + y_offset,
+ src_rect.right + x_offset, src_rect.bottom + y_offset);
+ FX_RECT dest_bound(0, 0, m_Width, m_Height);
+ dest_rect.Intersect(dest_bound);
+ if (pClipRgn) {
+ dest_rect.Intersect(pClipRgn->GetBox());
+ }
+ dest_left = dest_rect.left;
+ dest_top = dest_rect.top;
+ src_left = dest_left - x_offset;
+ src_top = dest_top - y_offset;
+ width = dest_rect.right - dest_rect.left;
+ height = dest_rect.bottom - dest_rect.top;
+}
+
+void CFX_DIBSource::SetPalette(const uint32_t* pSrc) {
+ static const uint32_t kPaletteSize = 256;
+ if (!pSrc || GetBPP() > 8) {
+ m_pPalette.reset();
+ return;
+ }
+ uint32_t pal_size = 1 << GetBPP();
+ if (!m_pPalette)
+ m_pPalette.reset(FX_Alloc(uint32_t, pal_size));
+ pal_size = std::min(pal_size, kPaletteSize);
+ FXSYS_memcpy(m_pPalette.get(), pSrc, pal_size * sizeof(uint32_t));
+}
+
+void CFX_DIBSource::GetPalette(uint32_t* pal, int alpha) const {
+ ASSERT(GetBPP() <= 8 && !IsCmykImage());
+ if (GetBPP() == 1) {
+ pal[0] = ((m_pPalette ? m_pPalette.get()[0] : 0xff000000) & 0xffffff) |
+ (alpha << 24);
+ pal[1] = ((m_pPalette ? m_pPalette.get()[1] : 0xffffffff) & 0xffffff) |
+ (alpha << 24);
+ return;
+ }
+ if (m_pPalette) {
+ for (int i = 0; i < 256; i++) {
+ pal[i] = (m_pPalette.get()[i] & 0x00ffffff) | (alpha << 24);
+ }
+ } else {
+ for (int i = 0; i < 256; i++) {
+ pal[i] = (i * 0x10101) | (alpha << 24);
+ }
+ }
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_DIBSource::CloneAlphaMask(
+ const FX_RECT* pClip) const {
+ ASSERT(GetFormat() == FXDIB_Argb);
+ FX_RECT rect(0, 0, m_Width, m_Height);
+ if (pClip) {
+ rect.Intersect(*pClip);
+ if (rect.IsEmpty())
+ return nullptr;
+ }
+ auto pMask = pdfium::MakeRetain<CFX_DIBitmap>();
+ if (!pMask->Create(rect.Width(), rect.Height(), FXDIB_8bppMask))
+ return nullptr;
+
+ for (int row = rect.top; row < rect.bottom; row++) {
+ const uint8_t* src_scan = GetScanline(row) + rect.left * 4 + 3;
+ uint8_t* dest_scan =
+ const_cast<uint8_t*>(pMask->GetScanline(row - rect.top));
+ for (int col = rect.left; col < rect.right; col++) {
+ *dest_scan++ = *src_scan;
+ src_scan += 4;
+ }
+ }
+ return pMask;
+}
+
+bool CFX_DIBSource::SetAlphaMask(const CFX_RetainPtr<CFX_DIBSource>& pAlphaMask,
+ const FX_RECT* pClip) {
+ if (!HasAlpha() || GetFormat() == FXDIB_Argb)
+ return false;
+
+ if (!pAlphaMask) {
+ m_pAlphaMask->Clear(0xff000000);
+ return true;
+ }
+ FX_RECT rect(0, 0, pAlphaMask->m_Width, pAlphaMask->m_Height);
+ if (pClip) {
+ rect.Intersect(*pClip);
+ if (rect.IsEmpty() || rect.Width() != m_Width ||
+ rect.Height() != m_Height) {
+ return false;
+ }
+ } else {
+ if (pAlphaMask->m_Width != m_Width || pAlphaMask->m_Height != m_Height)
+ return false;
+ }
+ for (int row = 0; row < m_Height; row++) {
+ FXSYS_memcpy(const_cast<uint8_t*>(m_pAlphaMask->GetScanline(row)),
+ pAlphaMask->GetScanline(row + rect.top) + rect.left,
+ m_pAlphaMask->m_Pitch);
+ }
+ return true;
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_DIBSource::FlipImage(bool bXFlip,
+ bool bYFlip) const {
+ auto pFlipped = pdfium::MakeRetain<CFX_DIBitmap>();
+ if (!pFlipped->Create(m_Width, m_Height, GetFormat()))
+ return nullptr;
+
+ pFlipped->SetPalette(m_pPalette.get());
+ uint8_t* pDestBuffer = pFlipped->GetBuffer();
+ int Bpp = m_bpp / 8;
+ for (int row = 0; row < m_Height; row++) {
+ const uint8_t* src_scan = GetScanline(row);
+ uint8_t* dest_scan =
+ pDestBuffer + m_Pitch * (bYFlip ? (m_Height - row - 1) : row);
+ if (!bXFlip) {
+ FXSYS_memcpy(dest_scan, src_scan, m_Pitch);
+ continue;
+ }
+ if (m_bpp == 1) {
+ FXSYS_memset(dest_scan, 0, m_Pitch);
+ for (int col = 0; col < m_Width; col++)
+ if (src_scan[col / 8] & (1 << (7 - col % 8))) {
+ int dest_col = m_Width - col - 1;
+ dest_scan[dest_col / 8] |= (1 << (7 - dest_col % 8));
+ }
+ } else {
+ dest_scan += (m_Width - 1) * Bpp;
+ if (Bpp == 1) {
+ for (int col = 0; col < m_Width; col++) {
+ *dest_scan = *src_scan;
+ dest_scan--;
+ src_scan++;
+ }
+ } else if (Bpp == 3) {
+ for (int col = 0; col < m_Width; col++) {
+ dest_scan[0] = src_scan[0];
+ dest_scan[1] = src_scan[1];
+ dest_scan[2] = src_scan[2];
+ dest_scan -= 3;
+ src_scan += 3;
+ }
+ } else {
+ ASSERT(Bpp == 4);
+ for (int col = 0; col < m_Width; col++) {
+ *(uint32_t*)dest_scan = *(uint32_t*)src_scan;
+ dest_scan -= 4;
+ src_scan += 4;
+ }
+ }
+ }
+ }
+ if (m_pAlphaMask) {
+ pDestBuffer = pFlipped->m_pAlphaMask->GetBuffer();
+ uint32_t dest_pitch = pFlipped->m_pAlphaMask->GetPitch();
+ for (int row = 0; row < m_Height; row++) {
+ const uint8_t* src_scan = m_pAlphaMask->GetScanline(row);
+ uint8_t* dest_scan =
+ pDestBuffer + dest_pitch * (bYFlip ? (m_Height - row - 1) : row);
+ if (!bXFlip) {
+ FXSYS_memcpy(dest_scan, src_scan, dest_pitch);
+ continue;
+ }
+ dest_scan += (m_Width - 1);
+ for (int col = 0; col < m_Width; col++) {
+ *dest_scan = *src_scan;
+ dest_scan--;
+ src_scan++;
+ }
+ }
+ }
+ return pFlipped;
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_DIBSource::CloneConvert(
+ FXDIB_Format dest_format) {
+ if (dest_format == GetFormat())
+ return Clone(nullptr);
+
+ auto pClone = pdfium::MakeRetain<CFX_DIBitmap>();
+ if (!pClone->Create(m_Width, m_Height, dest_format))
+ return nullptr;
+
+ CFX_RetainPtr<CFX_DIBitmap> pSrcAlpha;
+ if (HasAlpha()) {
+ if (GetFormat() == FXDIB_Argb)
+ pSrcAlpha = CloneAlphaMask();
+ else
+ pSrcAlpha = m_pAlphaMask;
+
+ if (!pSrcAlpha)
+ return nullptr;
+ }
+ bool ret = true;
+ if (dest_format & 0x0200) {
+ if (dest_format == FXDIB_Argb) {
+ ret = pSrcAlpha ? pClone->LoadChannel(FXDIB_Alpha, pSrcAlpha, FXDIB_Alpha)
+ : pClone->LoadChannel(FXDIB_Alpha, 0xff);
+ } else {
+ ret = pClone->SetAlphaMask(pSrcAlpha);
+ }
+ }
+ if (!ret)
+ return nullptr;
+
+ CFX_RetainPtr<CFX_DIBSource> holder(this);
+ std::unique_ptr<uint32_t, FxFreeDeleter> pal_8bpp;
+ if (!ConvertBuffer(dest_format, pClone->GetBuffer(), pClone->GetPitch(),
+ m_Width, m_Height, holder, 0, 0, &pal_8bpp)) {
+ return nullptr;
+ }
+ if (pal_8bpp)
+ pClone->SetPalette(pal_8bpp.get());
+
+ return pClone;
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_DIBSource::SwapXY(
+ bool bXFlip,
+ bool bYFlip,
+ const FX_RECT* pDestClip) const {
+ FX_RECT dest_clip(0, 0, m_Height, m_Width);
+ if (pDestClip)
+ dest_clip.Intersect(*pDestClip);
+ if (dest_clip.IsEmpty())
+ return nullptr;
+
+ auto pTransBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
+ int result_height = dest_clip.Height();
+ int result_width = dest_clip.Width();
+ if (!pTransBitmap->Create(result_width, result_height, GetFormat()))
+ return nullptr;
+
+ pTransBitmap->SetPalette(m_pPalette.get());
+ int dest_pitch = pTransBitmap->GetPitch();
+ uint8_t* dest_buf = pTransBitmap->GetBuffer();
+ int row_start = bXFlip ? m_Height - dest_clip.right : dest_clip.left;
+ int row_end = bXFlip ? m_Height - dest_clip.left : dest_clip.right;
+ int col_start = bYFlip ? m_Width - dest_clip.bottom : dest_clip.top;
+ int col_end = bYFlip ? m_Width - dest_clip.top : dest_clip.bottom;
+ if (GetBPP() == 1) {
+ FXSYS_memset(dest_buf, 0xff, dest_pitch * result_height);
+ for (int row = row_start; row < row_end; row++) {
+ const uint8_t* src_scan = GetScanline(row);
+ int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) -
+ dest_clip.left;
+ uint8_t* dest_scan = dest_buf;
+ if (bYFlip) {
+ dest_scan += (result_height - 1) * dest_pitch;
+ }
+ int dest_step = bYFlip ? -dest_pitch : dest_pitch;
+ for (int col = col_start; col < col_end; col++) {
+ if (!(src_scan[col / 8] & (1 << (7 - col % 8)))) {
+ dest_scan[dest_col / 8] &= ~(1 << (7 - dest_col % 8));
+ }
+ dest_scan += dest_step;
+ }
+ }
+ } else {
+ int nBytes = GetBPP() / 8;
+ int dest_step = bYFlip ? -dest_pitch : dest_pitch;
+ if (nBytes == 3) {
+ dest_step -= 2;
+ }
+ for (int row = row_start; row < row_end; row++) {
+ int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) -
+ dest_clip.left;
+ uint8_t* dest_scan = dest_buf + dest_col * nBytes;
+ if (bYFlip) {
+ dest_scan += (result_height - 1) * dest_pitch;
+ }
+ if (nBytes == 4) {
+ uint32_t* src_scan = (uint32_t*)GetScanline(row) + col_start;
+ for (int col = col_start; col < col_end; col++) {
+ *(uint32_t*)dest_scan = *src_scan++;
+ dest_scan += dest_step;
+ }
+ } else {
+ const uint8_t* src_scan = GetScanline(row) + col_start * nBytes;
+ if (nBytes == 1) {
+ for (int col = col_start; col < col_end; col++) {
+ *dest_scan = *src_scan++;
+ dest_scan += dest_step;
+ }
+ } else {
+ for (int col = col_start; col < col_end; col++) {
+ *dest_scan++ = *src_scan++;
+ *dest_scan++ = *src_scan++;
+ *dest_scan = *src_scan++;
+ dest_scan += dest_step;
+ }
+ }
+ }
+ }
+ }
+ if (m_pAlphaMask) {
+ dest_pitch = pTransBitmap->m_pAlphaMask->GetPitch();
+ dest_buf = pTransBitmap->m_pAlphaMask->GetBuffer();
+ int dest_step = bYFlip ? -dest_pitch : dest_pitch;
+ for (int row = row_start; row < row_end; row++) {
+ int dest_col = (bXFlip ? dest_clip.right - (row - row_start) - 1 : row) -
+ dest_clip.left;
+ uint8_t* dest_scan = dest_buf + dest_col;
+ if (bYFlip) {
+ dest_scan += (result_height - 1) * dest_pitch;
+ }
+ const uint8_t* src_scan = m_pAlphaMask->GetScanline(row) + col_start;
+ for (int col = col_start; col < col_end; col++) {
+ *dest_scan = *src_scan++;
+ dest_scan += dest_step;
+ }
+ }
+ }
+ return pTransBitmap;
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_DIBSource::TransformTo(
+ const CFX_Matrix* pDestMatrix,
+ int& result_left,
+ int& result_top,
+ uint32_t flags,
+ const FX_RECT* pDestClip) {
+ CFX_RetainPtr<CFX_DIBSource> holder(this);
+ CFX_ImageTransformer transformer(holder, pDestMatrix, flags, pDestClip);
+ transformer.Start();
+ transformer.Continue(nullptr);
+ result_left = transformer.result().left;
+ result_top = transformer.result().top;
+ return transformer.DetachBitmap();
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_DIBSource::StretchTo(int dest_width,
+ int dest_height,
+ uint32_t flags,
+ const FX_RECT* pClip) {
+ CFX_RetainPtr<CFX_DIBSource> holder(this);
+ FX_RECT clip_rect(0, 0, FXSYS_abs(dest_width), FXSYS_abs(dest_height));
+ if (pClip)
+ clip_rect.Intersect(*pClip);
+
+ if (clip_rect.IsEmpty())
+ return nullptr;
+
+ if (dest_width == m_Width && dest_height == m_Height)
+ return Clone(&clip_rect);
+
+ CFX_BitmapStorer storer;
+ CFX_ImageStretcher stretcher(&storer, holder, dest_width, dest_height,
+ clip_rect, flags);
+ if (stretcher.Start())
+ stretcher.Continue(nullptr);
+
+ return storer.Detach();
+}