Merge to XFA: Separate agg-authored code from fx-authored code.

Original Review URL: https://codereview.chromium.org/1152743007.
BUG=pdfium:166
R=brucedawson@chromium.org, thestig@chromium.org
TBR=brucedawson@chromium.org, thestig@chromium.org

Review URL: https://codereview.chromium.org/1186423003.

1 files changed, 506 insertions, 0 deletions

diff --git a/third_party/agg23/agg_array.h b/third_party/agg23/agg_array.h
new file mode 100644
index 0000000000..810eb4ef22
--- /dev/null
+++ b/third_party/agg23/agg_array.h
@@ -0,0 +1,506 @@
+
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.3
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+#ifndef AGG_ARRAY_INCLUDED
+#define AGG_ARRAY_INCLUDED
+#include "agg_basics.h"
+namespace agg
+{
+template<class T> class pod_array 
+{
+public:
+    typedef T value_type;
+    ~pod_array()
+    {
+        FX_Free(m_array);
+    }
+    pod_array() : m_size(0), m_capacity(0), m_array(0) {}
+    pod_array(unsigned cap, unsigned extra_tail = 0);
+    pod_array(const pod_array<T>&);
+    const pod_array<T>& operator = (const pod_array<T>&);
+    void capacity(unsigned cap, unsigned extra_tail = 0);
+    unsigned capacity() const
+    {
+        return m_capacity;
+    }
+    void allocate(unsigned size, unsigned extra_tail = 0);
+    void resize(unsigned new_size);
+    void zero()
+    {
+        FXSYS_memset(m_array, 0, sizeof(T) * m_size);
+    }
+    void add(const T& v)
+    {
+        m_array[m_size++] = v;
+    }
+    void inc_size(unsigned size)
+    {
+        m_size += size;
+    }
+    unsigned size()      const
+    {
+        return m_size;
+    }
+    unsigned byte_size() const
+    {
+        return m_size * sizeof(T);
+    }
+    const T& operator [] (unsigned i) const
+    {
+        return m_array[i];
+    }
+    T& operator [] (unsigned i)
+    {
+        return m_array[i];
+    }
+    const T& at(unsigned i) const
+    {
+        return m_array[i];
+    }
+    T& at(unsigned i)
+    {
+        return m_array[i];
+    }
+    T  value_at(unsigned i) const
+    {
+        return m_array[i];
+    }
+    const T* data() const
+    {
+        return m_array;
+    }
+    T* data()
+    {
+        return m_array;
+    }
+    void remove_all()
+    {
+        m_size = 0;
+    }
+    void cut_at(unsigned num)
+    {
+        if(num < m_size) {
+            m_size = num;
+        }
+    }
+private:
+    unsigned m_size;
+    unsigned m_capacity;
+    T*       m_array;
+};
+template<class T>
+void pod_array<T>::capacity(unsigned cap, unsigned extra_tail)
+{
+    m_size = 0;
+    unsigned full_cap = cap + extra_tail;
+    if(full_cap < cap) {
+        FX_Free(m_array);
+        m_array = 0;
+        m_capacity = 0;
+    } else if(full_cap > m_capacity) {
+        FX_Free(m_array);
+        m_array = FX_Alloc(T, full_cap);
+        m_capacity = full_cap;
+    }
+}
+template<class T>
+void pod_array<T>::allocate(unsigned size, unsigned extra_tail)
+{
+    capacity(size, extra_tail);
+    m_size = size;
+}
+template<class T>
+void pod_array<T>::resize(unsigned new_size)
+{
+    if(new_size > m_size) {
+        if(new_size > m_capacity) {
+            T* data = FX_Alloc(T, new_size);
+            FXSYS_memcpy(data, m_array, m_size * sizeof(T));
+            FX_Free(m_array);
+            m_array = data;
+        }
+    } else {
+        m_size = new_size;
+    }
+}
+template<class T> pod_array<T>::pod_array(unsigned cap, unsigned extra_tail) :
+    m_size(0), m_capacity(cap + extra_tail), m_array(FX_Alloc(T, m_capacity)) {}
+template<class T> pod_array<T>::pod_array(const pod_array<T>& v) :
+    m_size(v.m_size),
+    m_capacity(v.m_capacity),
+    m_array(v.m_capacity ? FX_Alloc(T, v.m_capacity) : 0)
+{
+    FXSYS_memcpy(m_array, v.m_array, sizeof(T) * v.m_size);
+}
+template<class T> const pod_array<T>&
+pod_array<T>::operator = (const pod_array<T>&v)
+{
+    allocate(v.m_size);
+    if(v.m_size) {
+        FXSYS_memcpy(m_array, v.m_array, sizeof(T) * v.m_size);
+    }
+    return *this;
+}
+template<class T, unsigned S = 6> class pod_deque 
+{
+public:
+    enum block_scale_e {
+        block_shift = S,
+        block_size  = 1 << block_shift,
+        block_mask  = block_size - 1
+    };
+    typedef T value_type;
+    ~pod_deque();
+    pod_deque();
+    pod_deque(unsigned block_ptr_inc);
+    pod_deque(const pod_deque<T, S>& v);
+    const pod_deque<T, S>& operator = (const pod_deque<T, S>& v);
+    void remove_all()
+    {
+        m_size = 0;
+    }
+    void free_all()
+    {
+        free_tail(0);
+    }
+    void free_tail(unsigned size);
+    void add(const T& val);
+    void modify_last(const T& val);
+    void remove_last();
+    int allocate_continuous_block(unsigned num_elements);
+    void add_array(const T* ptr, unsigned num_elem)
+    {
+        while(num_elem--) {
+            add(*ptr++);
+        }
+    }
+    template<class DataAccessor> void add_data(DataAccessor& data)
+    {
+        while(data.size()) {
+            add(*data);
+            ++data;
+        }
+    }
+    void cut_at(unsigned size)
+    {
+        if(size < m_size) {
+            m_size = size;
+        }
+    }
+    unsigned size() const
+    {
+        return m_size;
+    }
+    const T& operator [] (unsigned i) const
+    {
+        return m_blocks[i >> block_shift][i & block_mask];
+    }
+    T& operator [] (unsigned i)
+    {
+        return m_blocks[i >> block_shift][i & block_mask];
+    }
+    const T& at(unsigned i) const
+    {
+        return m_blocks[i >> block_shift][i & block_mask];
+    }
+    T& at(unsigned i)
+    {
+        return m_blocks[i >> block_shift][i & block_mask];
+    }
+    T value_at(unsigned i) const
+    {
+        return m_blocks[i >> block_shift][i & block_mask];
+    }
+    const T& curr(unsigned idx) const
+    {
+        return (*this)[idx];
+    }
+    T& curr(unsigned idx)
+    {
+        return (*this)[idx];
+    }
+    const T& prev(unsigned idx) const
+    {
+        return (*this)[(idx + m_size - 1) % m_size];
+    }
+    T& prev(unsigned idx)
+    {
+        return (*this)[(idx + m_size - 1) % m_size];
+    }
+    const T& next(unsigned idx) const
+    {
+        return (*this)[(idx + 1) % m_size];
+    }
+    T& next(unsigned idx)
+    {
+        return (*this)[(idx + 1) % m_size];
+    }
+    const T& last() const
+    {
+        return (*this)[m_size - 1];
+    }
+    T& last()
+    {
+        return (*this)[m_size - 1];
+    }
+    unsigned byte_size() const;
+    const T* block(unsigned nb) const
+    {
+        return m_blocks[nb];
+    }
+public:
+    void allocate_block(unsigned nb);
+    T*   data_ptr();
+    unsigned        m_size;
+    unsigned        m_num_blocks;
+    unsigned        m_max_blocks;
+    T**             m_blocks;
+    unsigned        m_block_ptr_inc;
+};
+template<class T, unsigned S> pod_deque<T, S>::~pod_deque()
+{
+    if(m_num_blocks) {
+        T** blk = m_blocks + m_num_blocks - 1;
+        while(m_num_blocks--) {
+            FX_Free(*blk);
+            --blk;
+        }
+        FX_Free(m_blocks);
+    }
+}
+template<class T, unsigned S>
+void pod_deque<T, S>::free_tail(unsigned size)
+{
+    if(size < m_size) {
+        unsigned nb = (size + block_mask) >> block_shift;
+        while(m_num_blocks > nb) {
+            FX_Free(m_blocks[--m_num_blocks]);
+        }
+        m_size = size;
+    }
+}
+template<class T, unsigned S> pod_deque<T, S>::pod_deque() :
+    m_size(0),
+    m_num_blocks(0),
+    m_max_blocks(0),
+    m_blocks(0),
+    m_block_ptr_inc(block_size)
+{
+}
+template<class T, unsigned S>
+pod_deque<T, S>::pod_deque(unsigned block_ptr_inc) :
+    m_size(0),
+    m_num_blocks(0),
+    m_max_blocks(0),
+    m_blocks(0),
+    m_block_ptr_inc(block_ptr_inc)
+{
+}
+template<class T, unsigned S>
+pod_deque<T, S>::pod_deque(const pod_deque<T, S>& v) :
+    m_size(v.m_size),
+    m_num_blocks(v.m_num_blocks),
+    m_max_blocks(v.m_max_blocks),
+    m_blocks(v.m_max_blocks ? FX_Alloc(T*, v.m_max_blocks) : 0),
+    m_block_ptr_inc(v.m_block_ptr_inc)
+{
+    unsigned i;
+    for(i = 0; i < v.m_num_blocks; ++i) {
+        m_blocks[i] = FX_Alloc(T, block_size);
+        FXSYS_memcpy(m_blocks[i], v.m_blocks[i], block_size * sizeof(T));
+    }
+}
+template<class T, unsigned S>
+const pod_deque<T, S>& pod_deque<T, S>::operator = (const pod_deque<T, S>& v)
+{
+    unsigned i;
+    for(i = m_num_blocks; i < v.m_num_blocks; ++i) {
+        allocate_block(i);
+    }
+    for(i = 0; i < v.m_num_blocks; ++i) {
+        FXSYS_memcpy(m_blocks[i], v.m_blocks[i], block_size * sizeof(T));
+    }
+    m_size = v.m_size;
+    return *this;
+}
+template<class T, unsigned S>
+void pod_deque<T, S>::allocate_block(unsigned nb)
+{
+    if(nb >= m_max_blocks) {
+        T** new_blocks = FX_Alloc(T*, m_max_blocks + m_block_ptr_inc);
+        if(m_blocks) {
+            FXSYS_memcpy(new_blocks,
+                         m_blocks,
+                         m_num_blocks * sizeof(T*));
+            FX_Free(m_blocks);
+        }
+        m_blocks = new_blocks;
+        m_max_blocks += m_block_ptr_inc;
+    }
+    m_blocks[nb] = FX_Alloc(T, block_size);
+    m_num_blocks++;
+}
+template<class T, unsigned S>
+inline T* pod_deque<T, S>::data_ptr()
+{
+    unsigned nb = m_size >> block_shift;
+    if(nb >= m_num_blocks) {
+        allocate_block(nb);
+    }
+    return m_blocks[nb] + (m_size & block_mask);
+}
+template<class T, unsigned S>
+inline void pod_deque<T, S>::add(const T& val)
+{
+    *data_ptr() = val;
+    ++m_size;
+}
+template<class T, unsigned S>
+inline void pod_deque<T, S>::remove_last()
+{
+    if(m_size) {
+        --m_size;
+    }
+}
+template<class T, unsigned S>
+void pod_deque<T, S>::modify_last(const T& val)
+{
+    remove_last();
+    add(val);
+}
+template<class T, unsigned S>
+int pod_deque<T, S>::allocate_continuous_block(unsigned num_elements)
+{
+    if(num_elements < block_size) {
+        data_ptr();
+        unsigned rest = block_size - (m_size & block_mask);
+        unsigned index;
+        if(num_elements <= rest) {
+            index = m_size;
+            m_size += num_elements;
+            return index;
+        }
+        m_size += rest;
+        data_ptr();
+        index = m_size;
+        m_size += num_elements;
+        return index;
+    }
+    return -1;
+}
+template<class T, unsigned S>
+unsigned pod_deque<T, S>::byte_size() const
+{
+    return m_size * sizeof(T);
+}
+class pod_allocator 
+{
+public:
+    void remove_all()
+    {
+        if(m_num_blocks) {
+            int8u** blk = m_blocks + m_num_blocks - 1;
+            while(m_num_blocks--) {
+                FX_Free(*blk);
+                --blk;
+            }
+            FX_Free(m_blocks);
+        }
+        m_num_blocks = 0;
+        m_max_blocks = 0;
+        m_blocks = 0;
+        m_buf_ptr = 0;
+        m_rest = 0;
+    }
+    ~pod_allocator()
+    {
+        remove_all();
+    }
+    pod_allocator(unsigned block_size, unsigned block_ptr_inc = 256 - 8) :
+        m_block_size(block_size),
+        m_block_ptr_inc(block_ptr_inc),
+        m_num_blocks(0),
+        m_max_blocks(0),
+        m_blocks(0),
+        m_buf_ptr(0),
+        m_rest(0)
+    {
+    }
+    int8u* allocate(unsigned size, unsigned alignment = 1)
+    {
+        if(size == 0) {
+            return 0;
+        }
+        if(size <= m_rest) {
+            int8u* ptr = m_buf_ptr;
+            if(alignment > 1) {
+                unsigned align = (alignment - unsigned((size_t)ptr) % alignment) % alignment;
+                size += align;
+                ptr += align;
+                if(size <= m_rest) {
+                    m_rest -= size;
+                    m_buf_ptr += size;
+                    return ptr;
+                }
+                allocate_block(size);
+                return allocate(size - align, alignment);
+            }
+            m_rest -= size;
+            m_buf_ptr += size;
+            return ptr;
+        }
+        allocate_block(size + alignment - 1);
+        return allocate(size, alignment);
+    }
+private:
+    void allocate_block(unsigned size)
+    {
+        if(size < m_block_size) {
+            size = m_block_size;
+        }
+        if(m_num_blocks >= m_max_blocks) {
+            int8u** new_blocks = FX_Alloc(int8u*, m_max_blocks + m_block_ptr_inc);
+            if(m_blocks) {
+                FXSYS_memcpy(new_blocks,
+                             m_blocks,
+                             m_num_blocks * sizeof(int8u*));
+                FX_Free(m_blocks);
+            }
+            m_blocks = new_blocks;
+            m_max_blocks += m_block_ptr_inc;
+        }
+        m_blocks[m_num_blocks] = m_buf_ptr = FX_Alloc(int8u, size);
+        m_num_blocks++;
+        m_rest = size;
+    }
+    unsigned m_block_size;
+    unsigned m_block_ptr_inc;
+    unsigned m_num_blocks;
+    unsigned m_max_blocks;
+    int8u**  m_blocks;
+    int8u*   m_buf_ptr;
+    unsigned m_rest;
+};
+enum quick_sort_threshold_e {
+    quick_sort_threshold = 9
+};
+template<class T> inline void swap_elements(T& a, T& b)
+{
+    T temp = a;
+    a = b;
+    b = temp;
+}
+}
+#endif