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authorLei Zhang <thestig@chromium.org>2017-09-19 14:18:48 -0700
committerChromium commit bot <commit-bot@chromium.org>2017-09-20 01:28:25 +0000
commit4b8d363ceed5437ee6a23563f69ba0a73d90413c (patch)
treef46c67c8a23318ea2d71035ca60355998e9daf20 /core/fxcodec/codec/ccodec_scanlinedecoder.cpp
parent89bf9ce294d83669922443dd17391e8c38e720a8 (diff)
downloadpdfium-4b8d363ceed5437ee6a23563f69ba0a73d90413c.tar.xz
Move CCodec_ScanlineDecoder to its own file.
Change-Id: Icacf877e2b66ca7d49637dcf9eaec0f99bcdd8bb Reviewed-on: https://pdfium-review.googlesource.com/14390 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'core/fxcodec/codec/ccodec_scanlinedecoder.cpp')
-rw-r--r--core/fxcodec/codec/ccodec_scanlinedecoder.cpp73
1 files changed, 73 insertions, 0 deletions
diff --git a/core/fxcodec/codec/ccodec_scanlinedecoder.cpp b/core/fxcodec/codec/ccodec_scanlinedecoder.cpp
new file mode 100644
index 0000000000..55b9a2a87d
--- /dev/null
+++ b/core/fxcodec/codec/ccodec_scanlinedecoder.cpp
@@ -0,0 +1,73 @@
+// 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/fxcodec/codec/ccodec_scanlinedecoder.h"
+
+#include "core/fxcrt/ifx_pauseindicator.h"
+
+CCodec_ScanlineDecoder::CCodec_ScanlineDecoder()
+ : CCodec_ScanlineDecoder(0, 0, 0, 0, 0, 0, 0) {}
+
+CCodec_ScanlineDecoder::CCodec_ScanlineDecoder(int nOrigWidth,
+ int nOrigHeight,
+ int nOutputWidth,
+ int nOutputHeight,
+ int nComps,
+ int nBpc,
+ uint32_t nPitch)
+ : m_OrigWidth(nOrigWidth),
+ m_OrigHeight(nOrigHeight),
+ m_OutputWidth(nOutputWidth),
+ m_OutputHeight(nOutputHeight),
+ m_nComps(nComps),
+ m_bpc(nBpc),
+ m_Pitch(nPitch),
+ m_NextLine(-1),
+ m_pLastScanline(nullptr) {}
+
+CCodec_ScanlineDecoder::~CCodec_ScanlineDecoder() {}
+
+const uint8_t* CCodec_ScanlineDecoder::GetScanline(int line) {
+ if (m_NextLine == line + 1)
+ return m_pLastScanline;
+
+ if (m_NextLine < 0 || m_NextLine > line) {
+ if (!v_Rewind())
+ return nullptr;
+ m_NextLine = 0;
+ }
+ while (m_NextLine < line) {
+ ReadNextLine();
+ m_NextLine++;
+ }
+ m_pLastScanline = ReadNextLine();
+ m_NextLine++;
+ return m_pLastScanline;
+}
+
+bool CCodec_ScanlineDecoder::SkipToScanline(int line,
+ IFX_PauseIndicator* pPause) {
+ if (m_NextLine == line || m_NextLine == line + 1)
+ return false;
+
+ if (m_NextLine < 0 || m_NextLine > line) {
+ v_Rewind();
+ m_NextLine = 0;
+ }
+ m_pLastScanline = nullptr;
+ while (m_NextLine < line) {
+ m_pLastScanline = ReadNextLine();
+ m_NextLine++;
+ if (pPause && pPause->NeedToPauseNow()) {
+ return true;
+ }
+ }
+ return false;
+}
+
+uint8_t* CCodec_ScanlineDecoder::ReadNextLine() {
+ return v_GetNextLine();
+}