26 lines
731 B
Diff
26 lines
731 B
Diff
diff --git a/third_party/agg23/agg_vcgen_dash.cpp b/third_party/agg23/agg_vcgen_dash.cpp
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index f690760b0..d44fca178 100644
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--- a/third_party/agg23/agg_vcgen_dash.cpp
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+++ b/third_party/agg23/agg_vcgen_dash.cpp
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@@ -18,8 +18,11 @@
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//
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//----------------------------------------------------------------------------
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+#include <cmath>
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+
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#include "agg_shorten_path.h"
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#include "agg_vcgen_dash.h"
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+#include "third_party/base/check_op.h"
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namespace pdfium
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{
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@@ -60,6 +63,8 @@ void vcgen_dash::dash_start(float ds)
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}
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void vcgen_dash::calc_dash_start(float ds)
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{
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+ DCHECK_GT(m_total_dash_len, 0);
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+ ds -= floor(ds / m_total_dash_len) * m_total_dash_len;
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m_curr_dash = 0;
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m_curr_dash_start = 0;
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while(ds > 0) {
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