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164 lines
4.0 KiB
164 lines
4.0 KiB
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//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.3
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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//
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// class renderer_base
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_RENDERER_BASE_INCLUDED
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#define AGG_RENDERER_BASE_INCLUDED
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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namespace agg
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{
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template<class PixelFormat> class renderer_base
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{
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public:
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typedef PixelFormat pixfmt_type;
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typedef typename pixfmt_type::color_type color_type;
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typedef typename pixfmt_type::row_data row_data;
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typedef typename pixfmt_type::span_data span_data;
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renderer_base() : m_ren(0), m_clip_box(1, 1, 0, 0) {}
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renderer_base(pixfmt_type& ren) :
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m_ren(&ren),
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m_clip_box(0, 0, ren.width() - 1, ren.height() - 1)
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{}
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void attach(pixfmt_type& ren)
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{
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m_ren = &ren;
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m_clip_box = rect(0, 0, ren.width() - 1, ren.height() - 1);
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}
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const pixfmt_type& ren() const
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{
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return *m_ren;
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}
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pixfmt_type& ren()
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{
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return *m_ren;
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}
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unsigned width() const
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{
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return m_ren->width();
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}
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unsigned height() const
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{
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return m_ren->height();
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}
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void first_clip_box() {}
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bool next_clip_box()
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{
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return false;
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}
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const rect& clip_box() const
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{
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return m_clip_box;
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}
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int xmin() const
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{
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return m_clip_box.x1;
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}
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int ymin() const
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{
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return m_clip_box.y1;
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}
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int xmax() const
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{
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return m_clip_box.x2;
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}
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int ymax() const
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{
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return m_clip_box.y2;
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}
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const rect& bounding_clip_box() const
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{
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return m_clip_box;
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}
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int bounding_xmin() const
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{
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return m_clip_box.x1;
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}
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int bounding_ymin() const
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{
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return m_clip_box.y1;
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}
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int bounding_xmax() const
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{
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return m_clip_box.x2;
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}
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int bounding_ymax() const
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{
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return m_clip_box.y2;
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}
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void blend_hline(int x1, int y, int x2,
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const color_type& c, cover_type cover)
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{
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if(x1 > x2) {
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int t = x2;
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x2 = x1;
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x1 = t;
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}
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if(y > ymax()) {
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return;
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}
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if(y < ymin()) {
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return;
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}
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if(x1 > xmax()) {
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return;
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}
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if(x2 < xmin()) {
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return;
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}
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if(x1 < xmin()) {
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x1 = xmin();
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}
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if(x2 > xmax()) {
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x2 = xmax();
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}
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m_ren->blend_hline(x1, y, x2 - x1 + 1, c, cover);
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}
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void blend_solid_hspan(int x, int y, int len,
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const color_type& c,
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const cover_type* covers)
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{
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if(y > ymax()) {
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return;
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}
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if(y < ymin()) {
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return;
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}
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if(x < xmin()) {
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len -= xmin() - x;
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if(len <= 0) {
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return;
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}
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covers += xmin() - x;
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x = xmin();
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}
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if(x + len > xmax()) {
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len = xmax() - x + 1;
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if(len <= 0) {
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return;
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}
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}
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m_ren->blend_solid_hspan(x, y, len, c, covers);
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}
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private:
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pixfmt_type* m_ren;
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rect m_clip_box;
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};
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}
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#endif
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