1 files changed, 161 insertions, 0 deletions
diff --git a/iup/src/gtk/iupgtk_draw.c b/iup/src/gtk/iupgtk_draw.c
new file mode 100644
index 0000000..4390c66
--- /dev/null
+++ b/iup/src/gtk/iupgtk_draw.c
@@ -0,0 +1,161 @@
+/** \file
+ * \brief Draw Functions
+ *
+ * See Copyright Notice in "iup.h"
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <memory.h>
+
+#include <gtk/gtk.h>
+
+#include "iup.h"
+
+#include "iup_attrib.h"
+#include "iup_class.h"
+#include "iup_str.h"
+#include "iup_object.h"
+#include "iup_image.h"
+#include "iup_draw.h"
+
+#include "iupgtk_drv.h"
+
+
+struct _IdrawCanvas{
+  Ihandle* ih;
+  int w, h;
+
+  GdkDrawable* wnd;
+  GdkPixmap* pixmap;
+  GdkGC *gc, *pixmap_gc;
+};
+
+IdrawCanvas* iupDrawCreateCanvas(Ihandle* ih)
+{
+  IdrawCanvas* dc = calloc(1, sizeof(IdrawCanvas));
+
+  dc->wnd = ih->handle->window;
+  dc->gc = gdk_gc_new(dc->wnd);
+
+  gdk_drawable_get_size(dc->wnd, &dc->w, &dc->h);
+
+  dc->pixmap = gdk_pixmap_new(dc->wnd, dc->w, dc->h, gdk_drawable_get_depth(dc->wnd));
+  dc->pixmap_gc = gdk_gc_new(dc->pixmap);
+
+  return dc;
+}
+
+void iupDrawKillCanvas(IdrawCanvas* dc)
+{
+  g_object_unref(dc->pixmap_gc); 
+  g_object_unref(dc->pixmap); 
+  g_object_unref(dc->gc); 
+
+  free(dc);
+}
+
+void iupDrawUpdateSize(IdrawCanvas* dc)
+{
+  int w, h;
+  gdk_drawable_get_size(dc->wnd, &w, &h);
+
+  if (w != dc->w || h != dc->h)
+  {
+    g_object_unref(dc->pixmap_gc); 
+    g_object_unref(dc->pixmap); 
+
+    dc->pixmap = gdk_pixmap_new(dc->wnd, dc->w, dc->h, gdk_drawable_get_depth(dc->wnd));
+    dc->pixmap_gc = gdk_gc_new(dc->pixmap);
+  }
+}
+
+void iupDrawFlush(IdrawCanvas* dc)
+{
+  gdk_draw_drawable(dc->wnd, dc->gc, dc->pixmap, 0, 0, 0, 0, dc->w, dc->h);
+}
+
+void iupDrawGetSize(IdrawCanvas* dc, int *w, int *h)
+{
+  if (w) *w = dc->w;
+  if (h) *h = dc->h;
+}
+
+void iupDrawParentBackground(IdrawCanvas* dc)
+{
+  unsigned char r=0, g=0, b=0;
+  char* color = iupBaseNativeParentGetBgColorAttrib(dc->ih);
+  iupStrToRGB(color, &r, &g, &b);
+  iupDrawRectangle(dc, 0, 0, dc->w-1, dc->h-1, r, g, b, 1);
+}
+
+void iupDrawRectangle(IdrawCanvas* dc, int x1, int y1, int x2, int y2, unsigned char r, unsigned char g, unsigned char b, int filled)
+{
+  GdkColor color;
+  iupgdkColorSet(&color, r, g, b);
+  gdk_gc_set_rgb_fg_color(dc->pixmap_gc, &color);
+  gdk_draw_rectangle(dc->pixmap, dc->pixmap_gc, filled, x1, y1, x2-x1+1, y2-y1+1);
+}
+
+void iupDrawLine(IdrawCanvas* dc, int x1, int y1, int x2, int y2, unsigned char r, unsigned char g, unsigned char b)
+{
+  GdkColor color;
+  iupgdkColorSet(&color, r, g, b);
+  gdk_gc_set_rgb_fg_color(dc->pixmap_gc, &color);
+  gdk_draw_line(dc->pixmap, dc->pixmap_gc, x1, y1, x2, y2);
+}
+
+void iupDrawArc(IdrawCanvas* dc, int x1, int y1, int x2, int y2, double a1, double a2, unsigned char r, unsigned char g, unsigned char b, int filled)
+{
+  GdkColor color;
+  iupgdkColorSet(&color, r, g, b);
+  gdk_gc_set_rgb_fg_color(dc->pixmap_gc, &color);
+  gdk_draw_arc(dc->pixmap, dc->pixmap_gc, filled, x1, y1, x2-x1+1, y2-y1+1, iupROUND(a1*64), iupROUND((a2 - a1)*64));
+}
+
+void iupDrawPolygon(IdrawCanvas* dc, int* points, int count, unsigned char r, unsigned char g, unsigned char b, int filled)
+{
+  GdkColor color;
+  iupgdkColorSet(&color, r, g, b);
+  gdk_gc_set_rgb_fg_color(dc->pixmap_gc, &color);
+  gdk_draw_polygon(dc->pixmap, dc->pixmap_gc, filled, (GdkPoint*)points, count);
+}
+
+void iupDrawSetClipRect(IdrawCanvas* dc, int x1, int y1, int x2, int y2)
+{
+  GdkRectangle rect;
+  rect.x      = x1;
+  rect.y      = y1;
+  rect.width  = x2-x1+1;
+  rect.height = y2-y1+1;
+  gdk_gc_set_clip_rectangle(dc->pixmap_gc, &rect);
+}
+
+void iupDrawResetClip(IdrawCanvas* dc)
+{
+  gdk_gc_set_clip_region(dc->pixmap_gc, NULL);
+}
+
+void iupDrawText(IdrawCanvas* dc, const char* text, int len, int x, int y, unsigned char r, unsigned char g, unsigned char b)
+{
+  PangoLayout* fontlayout = (PangoLayout*)IupGetAttribute(dc->ih, "PANGOLAYOUT");
+  GdkColor color;
+  iupgdkColorSet(&color, r, g, b);
+  gdk_gc_set_rgb_fg_color(dc->pixmap_gc, &color);
+  pango_layout_set_text(fontlayout, iupgtkStrConvertToUTF8(text), len);
+  gdk_draw_layout(dc->pixmap, dc->pixmap_gc, x, y, fontlayout);
+}
+
+void iupDrawImage(IdrawCanvas* dc, const char* name, int make_inactive, int x, int y)
+{
+  int img_w, img_h, bpp;
+  GdkPixbuf* pixbuf = iupImageGetImage(name, dc->ih, make_inactive);
+  if (!pixbuf)
+    return;
+
+  /* must use this info, since image can be a driver image loaded from resources */
+  iupdrvImageGetInfo(pixbuf, &img_w, &img_h, &bpp);
+
+  gdk_draw_pixbuf(dc->pixmap, dc->pixmap_gc, pixbuf, 0, 0, x, y, img_w, img_h, GDK_RGB_DITHER_NORMAL, 0, 0);
+}