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authorTom Sepez <tsepez@chromium.org>2015-06-17 10:01:00 -0700
committerTom Sepez <tsepez@chromium.org>2015-06-17 10:01:00 -0700
commitb7d358b498800e4c240d381fa6f098af17a4d95b (patch)
treeaa0d8677af748caf9881ecd011af2b00af925188 /third_party/agg23/agg_renderer_base.h
parent9555022ee550ee97415a86957686cc28716c4dee (diff)
downloadpdfium-b7d358b498800e4c240d381fa6f098af17a4d95b.tar.xz
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.
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+
+//----------------------------------------------------------------------------
+// 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
+//----------------------------------------------------------------------------
+//
+// class renderer_base
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_RENDERER_BASE_INCLUDED
+#define AGG_RENDERER_BASE_INCLUDED
+#include "agg_basics.h"
+#include "agg_rendering_buffer.h"
+namespace agg
+{
+template<class PixelFormat> class renderer_base
+{
+public:
+ typedef PixelFormat pixfmt_type;
+ typedef typename pixfmt_type::color_type color_type;
+ typedef typename pixfmt_type::row_data row_data;
+ typedef typename pixfmt_type::span_data span_data;
+ renderer_base() : m_ren(0), m_clip_box(1, 1, 0, 0) {}
+ renderer_base(pixfmt_type& ren) :
+ m_ren(&ren),
+ m_clip_box(0, 0, ren.width() - 1, ren.height() - 1)
+ {}
+ void attach(pixfmt_type& ren)
+ {
+ m_ren = &ren;
+ m_clip_box = rect(0, 0, ren.width() - 1, ren.height() - 1);
+ }
+ const pixfmt_type& ren() const
+ {
+ return *m_ren;
+ }
+ pixfmt_type& ren()
+ {
+ return *m_ren;
+ }
+ unsigned width() const
+ {
+ return m_ren->width();
+ }
+ unsigned height() const
+ {
+ return m_ren->height();
+ }
+ void first_clip_box() {}
+ bool next_clip_box()
+ {
+ return false;
+ }
+ const rect& clip_box() const
+ {
+ return m_clip_box;
+ }
+ int xmin() const
+ {
+ return m_clip_box.x1;
+ }
+ int ymin() const
+ {
+ return m_clip_box.y1;
+ }
+ int xmax() const
+ {
+ return m_clip_box.x2;
+ }
+ int ymax() const
+ {
+ return m_clip_box.y2;
+ }
+ const rect& bounding_clip_box() const
+ {
+ return m_clip_box;
+ }
+ int bounding_xmin() const
+ {
+ return m_clip_box.x1;
+ }
+ int bounding_ymin() const
+ {
+ return m_clip_box.y1;
+ }
+ int bounding_xmax() const
+ {
+ return m_clip_box.x2;
+ }
+ int bounding_ymax() const
+ {
+ return m_clip_box.y2;
+ }
+ void blend_hline(int x1, int y, int x2,
+ const color_type& c, cover_type cover)
+ {
+ if(x1 > x2) {
+ int t = x2;
+ x2 = x1;
+ x1 = t;
+ }
+ if(y > ymax()) {
+ return;
+ }
+ if(y < ymin()) {
+ return;
+ }
+ if(x1 > xmax()) {
+ return;
+ }
+ if(x2 < xmin()) {
+ return;
+ }
+ if(x1 < xmin()) {
+ x1 = xmin();
+ }
+ if(x2 > xmax()) {
+ x2 = xmax();
+ }
+ m_ren->blend_hline(x1, y, x2 - x1 + 1, c, cover);
+ }
+ void blend_solid_hspan(int x, int y, int len,
+ const color_type& c,
+ const cover_type* covers)
+ {
+ if(y > ymax()) {
+ return;
+ }
+ if(y < ymin()) {
+ return;
+ }
+ if(x < xmin()) {
+ len -= xmin() - x;
+ if(len <= 0) {
+ return;
+ }
+ covers += xmin() - x;
+ x = xmin();
+ }
+ if(x + len > xmax()) {
+ len = xmax() - x + 1;
+ if(len <= 0) {
+ return;
+ }
+ }
+ m_ren->blend_solid_hspan(x, y, len, c, covers);
+ }
+private:
+ pixfmt_type* m_ren;
+ rect m_clip_box;
+};
+}
+#endif