1ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 2ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov//---------------------------------------------------------------------------- 3ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// Anti-Grain Geometry - Version 2.3 4ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) 5ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// 6ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// Permission to copy, use, modify, sell and distribute this software 7ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// is granted provided this copyright notice appears in all copies. 8ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// This software is provided "as is" without express or implied 9ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// warranty, and with no claim as to its suitability for any purpose. 10ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// 11ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov//---------------------------------------------------------------------------- 12ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// Contact: mcseem@antigrain.com 13ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// mcseemagg@yahoo.com 14ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// http://www.antigrain.com 15ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov//---------------------------------------------------------------------------- 16ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// 17ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// class rendering_buffer 18ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov// 19ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov//---------------------------------------------------------------------------- 20ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef AGG_RENDERING_BUFFER_INCLUDED 21ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define AGG_RENDERING_BUFFER_INCLUDED 22ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "agg_basics.h" 23ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovnamespace agg 24ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 25e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovclass rendering_buffer 26ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 27ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovpublic: 28e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov struct row_data { 29ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int x1, x2; 30ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const int8u* ptr; 31ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov row_data() {} 32ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov row_data(int x1_, int x2_, const int8u* ptr_) : 33ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov x1(x1_), x2(x2_), ptr(ptr_) {} 34ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov }; 35e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov struct span_data { 36ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int x; 37ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned len; 38ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u* ptr; 39ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov span_data() {} 40ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov span_data(int) : x(0), len(0), ptr(0) {} 41ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov span_data(int x_, unsigned len_, int8u* ptr_) : 42ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov x(x_), len(len_), ptr(ptr_) {} 43ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov }; 44ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ~rendering_buffer() 45ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 46ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FX_Free(m_rows); 47ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 48ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov rendering_buffer() : 49ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_buf(0), 50ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_rows(0), 51ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_width(0), 52ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_height(0), 53ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_stride(0), 54ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_max_height(0) 55ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 56ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 57ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov rendering_buffer(int8u* buf, unsigned width, unsigned height, int stride) : 58ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_buf(0), 59ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_rows(0), 60ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_width(0), 61ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_height(0), 62ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_stride(0), 63ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_max_height(0) 64ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 65ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov attach(buf, width, height, stride); 66ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 67ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov void attach(int8u* buf, unsigned width, unsigned height, int stride) 68ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 69ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_buf = buf; 70ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_width = width; 71ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_height = height; 72ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_stride = stride; 73ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if(height > m_max_height) { 74ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FX_Free(m_rows); 75ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov m_rows = FX_Alloc(int8u*, m_max_height = height); 76ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 77ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u* row_ptr = m_buf; 78ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if(stride < 0) { 79ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov row_ptr = m_buf - int(height - 1) * stride; 80ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 81ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u** rows = m_rows; 82ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while(height--) { 83ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov *rows++ = row_ptr; 84ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov row_ptr += stride; 85ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 86ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 87ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u* buf() 88ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 89ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_buf; 90ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 91ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const int8u* buf() const 92ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 93ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_buf; 94ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 95ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned width() const 96ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 97ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_width; 98ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 99ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned height() const 100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_height; 102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int stride() const 104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_stride; 106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned stride_abs() const 108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return (m_stride < 0) ? 110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned(-m_stride) : 111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned(m_stride); 112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 113ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u* row(unsigned y) 114ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 115ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_rows[y]; 116ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 117ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const int8u* row(unsigned y) const 118ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 119ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_rows[y]; 120ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 121ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u* next_row(void* p) 122ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 123ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return (int8u*)p + m_stride; 124ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 125ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const int8u* next_row(const void* p) const 126ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 127ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return (int8u*)p + m_stride; 128ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 129ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u const* const* rows() const 130ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 131ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return m_rows; 132ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 133ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovprivate: 134ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov rendering_buffer(const rendering_buffer&); 135ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const rendering_buffer& operator = (const rendering_buffer&); 136ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovprivate: 137ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u* m_buf; 138ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int8u** m_rows; 139ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned m_width; 140ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned m_height; 141ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int m_stride; 142ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned m_max_height; 143ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov}; 144ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 145ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 146