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authorscuri <scuri>2008-10-17 06:10:33 +0000
committerscuri <scuri>2008-10-17 06:10:33 +0000
commit7b52cc13af4e85f1ca2deb6b6c77de9c95ea0dcf (patch)
treed0857278bde2eff784227c57dcaf930346ceb7ac /src/wdhdcpy.c
First commit - moving from LuaForge to SourceForge
Diffstat (limited to 'src/wdhdcpy.c')
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diff --git a/src/wdhdcpy.c b/src/wdhdcpy.c
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+/** \file
+ * \brief WD Hardcopy Client function
+ *
+ * See Copyright Notice in cd.h
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "cd.h"
+#include "wd.h"
+
+/* from cd_private.h */
+int cdRound(double x);
+
+/* re-declared here to ignore CD_NO_OLD_INTERFACE definition */
+int cdActivate(cdCanvas* canvas);
+cdCanvas* cdActiveCanvas(void);
+
+/*
+** ---------------------------------------------------------------
+** Private functions:
+*/
+
+static void _wdHdcpyDoit(cdCanvas *canvas, cdCanvas *canvas_copy, void (*draw_func)(cdCanvas *canvas_copy))
+{
+ cdCanvas *old_active;
+ double left, right, bottom, top; /* canvas visualization window */
+ int canvas_hsize, canvas_vsize; /* canvas sizes in pixels */
+ int hdcpy_hsize, hdcpy_vsize; /* paper sizes in points */
+ double canvas_vpr; /* canvas viewport distortion ratio */
+ double hdcpy_vpr; /* paper viewport distortion ratio */
+ int xc, yc; /* paper center in pixels */
+ int xmin, xmax, ymin, ymax; /* paper viewport */
+
+ /* Activate canvas visualization surface. */
+ if (cdCanvasActivate(canvas) != CD_OK) return;
+
+ /* Get current canvas window parameters and sizes. */
+ wdCanvasGetWindow(canvas, &left, &right, &bottom, &top);
+ cdCanvasGetSize(canvas, &canvas_hsize, &canvas_vsize, 0L, 0L);
+
+ /* Activate hardcopy visualization surface. */
+ if (cdCanvasActivate(canvas_copy) != CD_OK) return;
+
+ /* Set window parameters on hardcopy surface. */
+ wdCanvasWindow(canvas_copy, left, right, bottom, top);
+
+ /* Adjust paper viewport, centralized, matching canvas viewport. */
+ canvas_vpr = (double)canvas_vsize / (double)canvas_hsize;
+ cdCanvasGetSize(canvas_copy, &hdcpy_hsize, &hdcpy_vsize, 0L, 0L);
+ hdcpy_vpr = (double)hdcpy_vsize / (double)hdcpy_hsize;
+ xc = (int)((double)hdcpy_hsize/2.0);
+ yc = (int)((double)hdcpy_vsize/2.0);
+
+ if (canvas_vpr < hdcpy_vpr)
+ {
+ xmin = 0;
+ xmax = hdcpy_hsize;
+ ymin = yc - (int)((double)hdcpy_hsize*(double)canvas_vpr/2.0);
+ ymax = yc + (int)((double)hdcpy_hsize*(double)canvas_vpr/2.0);
+ }
+ else
+ {
+ xmin = xc - (int)((double)hdcpy_vsize/(double)canvas_vpr/2.0);
+ xmax = xc + (int)((double)hdcpy_vsize/(double)canvas_vpr/2.0);
+ ymin = 0;
+ ymax = hdcpy_vsize;
+ }
+
+ cdCanvasClipArea(canvas_copy, xmin, xmax, ymin, ymax);
+ cdCanvasClip(canvas_copy, CD_CLIPAREA);
+ wdCanvasViewport(canvas_copy, xmin, xmax, ymin, ymax);
+
+ /* for backward compatibility */
+ old_active = cdActiveCanvas();
+ cdActivate(canvas_copy);
+
+ /* Draw on hardcopy surface. */
+ draw_func(canvas_copy);
+
+ if (old_active) cdActivate(old_active);
+}
+
+/*
+** ---------------------------------------------------------------
+** Entry points begin here:
+*/
+
+void wdCanvasHardcopy(cdCanvas *canvas, cdContext* ctx, void *data, void(*draw_func)(cdCanvas *canvas_copy))
+{
+ /* Create a visualization surface. */
+ cdCanvas *canvas_copy = cdCreateCanvas(ctx, data);
+ if (!canvas_copy) return;
+
+ /* Do hardcopy. */
+ _wdHdcpyDoit(canvas, canvas_copy, draw_func);
+
+ /* Destroy visualization surface. */
+ cdKillCanvas(canvas_copy);
+}