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diff --git a/agg/inc/agg_trans_viewport.h b/agg/inc/agg_trans_viewport.h
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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
+//----------------------------------------------------------------------------
+//
+// Viewport transformer - simple orthogonal conversions from world coordinates
+// to screen (device) ones.
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_TRANS_VIEWPORT_INCLUDED
+#define AGG_TRANS_VIEWPORT_INCLUDED
+
+#include <string.h>
+#include "agg_basics.h"
+
+
+namespace agg
+{
+
+ enum aspect_ratio_e
+ {
+ aspect_ratio_stretch,
+ aspect_ratio_meet,
+ aspect_ratio_slice
+ };
+
+
+ //----------------------------------------------------------trans_viewport
+ class trans_viewport
+ {
+ public:
+ //-------------------------------------------------------------------
+ trans_viewport() :
+ m_world_x1(0.0),
+ m_world_y1(0.0),
+ m_world_x2(1.0),
+ m_world_y2(1.0),
+ m_device_x1(0.0),
+ m_device_y1(0.0),
+ m_device_x2(1.0),
+ m_device_y2(1.0),
+ m_aspect(aspect_ratio_stretch),
+ m_align_x(0.5),
+ m_align_y(0.5),
+ m_wx1(0.0),
+ m_wy1(0.0),
+ m_wx2(1.0),
+ m_wy2(1.0),
+ m_dx1(0.0),
+ m_dy1(0.0),
+ m_kx(1.0),
+ m_ky(1.0)
+ {}
+
+ //-------------------------------------------------------------------
+ void preserve_aspect_ratio(double alignx,
+ double aligny,
+ aspect_ratio_e aspect)
+ {
+ m_align_x = alignx;
+ m_align_y = aligny;
+ m_aspect = aspect;
+ update();
+ }
+
+ //-------------------------------------------------------------------
+ void device_viewport(double x1, double y1, double x2, double y2)
+ {
+ m_device_x1 = x1;
+ m_device_y1 = y1;
+ m_device_x2 = x2;
+ m_device_y2 = y2;
+ update();
+ }
+
+ //-------------------------------------------------------------------
+ void world_viewport(double x1, double y1, double x2, double y2)
+ {
+ m_world_x1 = x1;
+ m_world_y1 = y1;
+ m_world_x2 = x2;
+ m_world_y2 = y2;
+ update();
+ }
+
+ //-------------------------------------------------------------------
+ void device_viewport(double* x1, double* y1, double* x2, double* y2) const
+ {
+ *x1 = m_device_x1;
+ *y1 = m_device_y1;
+ *x2 = m_device_x2;
+ *y2 = m_device_y2;
+ }
+
+ //-------------------------------------------------------------------
+ void world_viewport(double* x1, double* y1, double* x2, double* y2) const
+ {
+ *x1 = m_world_x1;
+ *y1 = m_world_y1;
+ *x2 = m_world_x2;
+ *y2 = m_world_y2;
+ }
+
+ //-------------------------------------------------------------------
+ void world_viewport_actual(double* x1, double* y1,
+ double* x2, double* y2) const
+ {
+ *x1 = m_wx1;
+ *y1 = m_wy1;
+ *x2 = m_wx2;
+ *y2 = m_wy2;
+ }
+
+ //-------------------------------------------------------------------
+ double align_x() const { return m_align_x; }
+ double align_y() const { return m_align_y; }
+ aspect_ratio_e aspect_ratio() const { return m_aspect; }
+
+ //-------------------------------------------------------------------
+ void transform(double* x, double* y) const
+ {
+ *x = (*x - m_wx1) * m_kx + m_dx1;
+ *y = (*y - m_wy1) * m_ky + m_dy1;
+ }
+
+ //-------------------------------------------------------------------
+ void inverse_transform(double* x, double* y) const
+ {
+ *x = (*x - m_dx1) / m_kx + m_wx1;
+ *y = (*y - m_dy1) / m_ky + m_wy1;
+ }
+
+ //-------------------------------------------------------------------
+ double scale_x() const
+ {
+ return m_kx;
+ }
+
+ //-------------------------------------------------------------------
+ double scale_y() const
+ {
+ return m_ky;
+ }
+
+ //-------------------------------------------------------------------
+ double scale() const
+ {
+ return (m_kx + m_ky) * 0.5;
+ }
+
+
+ //-------------------------------------------------------------------
+ unsigned byte_size() const
+ {
+ return
+ sizeof(m_world_x1) +
+ sizeof(m_world_y1) +
+ sizeof(m_world_x2) +
+ sizeof(m_world_y2) +
+ sizeof(m_device_x1) +
+ sizeof(m_device_y1) +
+ sizeof(m_device_x2) +
+ sizeof(m_device_y2) +
+ sizeof(m_aspect) +
+ sizeof(m_align_x) +
+ sizeof(m_align_y) +
+ sizeof(m_wx1) +
+ sizeof(m_wy1) +
+ sizeof(m_wx2) +
+ sizeof(m_wy2) +
+ sizeof(m_dx1) +
+ sizeof(m_dy1) +
+ sizeof(m_kx) +
+ sizeof(m_ky);
+ }
+
+ void serialize(int8u* ptr) const
+ {
+ memcpy(ptr, &m_world_x1, sizeof(m_world_x1)); ptr += sizeof(m_world_x1);
+ memcpy(ptr, &m_world_y1, sizeof(m_world_y1)); ptr += sizeof(m_world_y1);
+ memcpy(ptr, &m_world_x2, sizeof(m_world_x2)); ptr += sizeof(m_world_x2);
+ memcpy(ptr, &m_world_y2, sizeof(m_world_y2)); ptr += sizeof(m_world_y2);
+ memcpy(ptr, &m_device_x1, sizeof(m_device_x1)); ptr += sizeof(m_device_x1);
+ memcpy(ptr, &m_device_y1, sizeof(m_device_y1)); ptr += sizeof(m_device_y1);
+ memcpy(ptr, &m_device_x2, sizeof(m_device_x2)); ptr += sizeof(m_device_x2);
+ memcpy(ptr, &m_device_y2, sizeof(m_device_y2)); ptr += sizeof(m_device_y2);
+ memcpy(ptr, &m_aspect, sizeof(m_aspect)); ptr += sizeof(m_aspect);
+ memcpy(ptr, &m_align_x, sizeof(m_align_x)); ptr += sizeof(m_align_x);
+ memcpy(ptr, &m_align_y, sizeof(m_align_y)); ptr += sizeof(m_align_y);
+ memcpy(ptr, &m_wx1, sizeof(m_wx1)); ptr += sizeof(m_wx1);
+ memcpy(ptr, &m_wy1, sizeof(m_wy1)); ptr += sizeof(m_wy1);
+ memcpy(ptr, &m_wx2, sizeof(m_wx2)); ptr += sizeof(m_wx2);
+ memcpy(ptr, &m_wy2, sizeof(m_wy2)); ptr += sizeof(m_wy2);
+ memcpy(ptr, &m_dx1, sizeof(m_dx1)); ptr += sizeof(m_dx1);
+ memcpy(ptr, &m_dy1, sizeof(m_dy1)); ptr += sizeof(m_dy1);
+ memcpy(ptr, &m_kx, sizeof(m_kx)); ptr += sizeof(m_kx);
+ memcpy(ptr, &m_ky, sizeof(m_ky)); ptr += sizeof(m_ky);
+ }
+
+ void deserialize(const int8u* ptr)
+ {
+ memcpy(&m_world_x1, ptr, sizeof(m_world_x1)); ptr += sizeof(m_world_x1);
+ memcpy(&m_world_y1, ptr, sizeof(m_world_y1)); ptr += sizeof(m_world_y1);
+ memcpy(&m_world_x2, ptr, sizeof(m_world_x2)); ptr += sizeof(m_world_x2);
+ memcpy(&m_world_y2, ptr, sizeof(m_world_y2)); ptr += sizeof(m_world_y2);
+ memcpy(&m_device_x1, ptr, sizeof(m_device_x1)); ptr += sizeof(m_device_x1);
+ memcpy(&m_device_y1, ptr, sizeof(m_device_y1)); ptr += sizeof(m_device_y1);
+ memcpy(&m_device_x2, ptr, sizeof(m_device_x2)); ptr += sizeof(m_device_x2);
+ memcpy(&m_device_y2, ptr, sizeof(m_device_y2)); ptr += sizeof(m_device_y2);
+ memcpy(&m_aspect, ptr, sizeof(m_aspect)); ptr += sizeof(m_aspect);
+ memcpy(&m_align_x, ptr, sizeof(m_align_x)); ptr += sizeof(m_align_x);
+ memcpy(&m_align_y, ptr, sizeof(m_align_y)); ptr += sizeof(m_align_y);
+ memcpy(&m_wx1, ptr, sizeof(m_wx1)); ptr += sizeof(m_wx1);
+ memcpy(&m_wy1, ptr, sizeof(m_wy1)); ptr += sizeof(m_wy1);
+ memcpy(&m_wx2, ptr, sizeof(m_wx2)); ptr += sizeof(m_wx2);
+ memcpy(&m_wy2, ptr, sizeof(m_wy2)); ptr += sizeof(m_wy2);
+ memcpy(&m_dx1, ptr, sizeof(m_dx1)); ptr += sizeof(m_dx1);
+ memcpy(&m_dy1, ptr, sizeof(m_dy1)); ptr += sizeof(m_dy1);
+ memcpy(&m_kx, ptr, sizeof(m_kx)); ptr += sizeof(m_kx);
+ memcpy(&m_ky, ptr, sizeof(m_ky)); ptr += sizeof(m_ky);
+ }
+
+ private:
+ void update();
+
+ double m_world_x1;
+ double m_world_y1;
+ double m_world_x2;
+ double m_world_y2;
+ double m_device_x1;
+ double m_device_y1;
+ double m_device_x2;
+ double m_device_y2;
+ aspect_ratio_e m_aspect;
+ double m_align_x;
+ double m_align_y;
+ double m_wx1;
+ double m_wy1;
+ double m_wx2;
+ double m_wy2;
+ double m_dx1;
+ double m_dy1;
+ double m_kx;
+ double m_ky;
+ };
+
+
+
+ //-----------------------------------------------------------------------
+ inline void trans_viewport::update()
+ {
+ double world_x1 = m_world_x1;
+ double world_y1 = m_world_y1;
+ double world_x2 = m_world_x2;
+ double world_y2 = m_world_y2;
+ double device_x1 = m_device_x1;
+ double device_y1 = m_device_y1;
+ double device_x2 = m_device_x2;
+ double device_y2 = m_device_y2;
+ if(m_aspect != aspect_ratio_stretch)
+ {
+ double d;
+ m_kx = (device_x2 - device_x1) / (world_x2 - world_x1);
+ m_ky = (device_y2 - device_y1) / (world_y2 - world_y1);
+
+ if((m_aspect == aspect_ratio_meet) == (m_kx < m_ky))
+ {
+ d = (world_y2 - world_y1) * m_ky / m_kx;
+ world_y1 += (world_y2 - world_y1 - d) * m_align_y;
+ world_y2 = world_y1 + d;
+ }
+ else
+ {
+ d = (world_x2 - world_x1) * m_kx / m_ky;
+ world_x1 += (world_x2 - world_x1 - d) * m_align_x;
+ world_x2 = world_x1 + d;
+ }
+ }
+ m_wx1 = world_x1;
+ m_wy1 = world_y1;
+ m_wx2 = world_x2;
+ m_wy2 = world_y2;
+ m_dx1 = device_x1;
+ m_dy1 = device_y1;
+ m_kx = (device_x2 - device_x1) / (world_x2 - world_x1);
+ m_ky = (device_y2 - device_y1) / (world_y2 - world_y1);
+ }
+
+
+}
+
+
+#endif