nanovega/util.d

   1 /* Invisible Vector Library
   2  * ported by Ketmar // Invisible Vector <ketmar@ketmar.no-ip.org>
   3  * Understanding is not required. Only obedience.
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, version 3 of the License ONLY.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 module iv.nanovega.util;
  18 private:
  19
  20 public import arsd.simpledisplay;
  21 public import iv.nanovega.nanovega;
  22
  23
  24 // ////////////////////////////////////////////////////////////////////////// //
  25 public class NVGWindow : SimpleWindow {
  26 public:
  27   NVGContext nvg; // our NanoVega context
  28   NVGContextFlag nvgInitFlags = NVGContextFlag.Default; // bitwise or
  29
  30   void delegate (NVGWindow self, NVGContext nvg) onInitOpenGL; // will be called after creating nvg
  31   void delegate (NVGWindow self, NVGContext nvg) onDeinitOpenGL; // will be called before destroying nvg
  32   void delegate (NVGWindow self, NVGContext nvg) onRedraw; // will be called in [redrawOpenGlScene]
  33
  34 protected:
  35   void setupCallbacks () {
  36     visibleForTheFirstTime = delegate () {
  37       onBeforeInitNVG();
  38       nvg = nvgCreateContext(cast(NVGContextFlag)nvgInitFlags);
  39       if (nvg is null) assert(0, "cannot initialize NanoVega");
  40       if (onInitOpenGL !is null) onInitOpenGL(this, nvg);
  41       flushGui();
  42     };
  43     redrawOpenGlScene = delegate () {
  44       if (width < 1 || height < 1 || closed) return;
  45       if (onRedraw !is null && nvg !is null) {
  46         setAsCurrentOpenGlContext();
  47         scope(exit) releaseCurrentOpenGlContext();
  48         glViewport(0, 0, width, height);
  49         onRedraw(this, nvg);
  50       }
  51     };
  52   }
  53
  54   void onBeforeInitNVG () {} // you can set [nvgInitFlags] here
  55
  56 public:
  57   this (int width=800, int height=800, string title=null, Resizability resizable=Resizability.allowResizing, WindowTypes windowType=WindowTypes.normal, int customizationFlags=WindowFlags.normal, SimpleWindow parent=null) {
  58     setupCallbacks();
  59     super(width, height, title, OpenGlOptions.yes, resizable, windowType, customizationFlags, parent);
  60   }
  61
  62   this (Size size, string title=null, Resizability resizable=Resizability.allowResizing) {
  63     setupCallbacks();
  64     super(size, title, OpenGlOptions.yes, resizable);
  65   }
  66
  67   override void close () {
  68     if (!closed && nvg !is null) {
  69       setAsCurrentOpenGlContext();
  70       scope(exit) { flushGui(); releaseCurrentOpenGlContext(); }
  71       if (onDeinitOpenGL !is null) onDeinitOpenGL(this, nvg);
  72       nvg.kill();
  73     }
  74     super.close();
  75   }
  76
  77   final void forceRedraw () {
  78     if (!closed && visible) redrawOpenGlSceneNow();
  79   }
  80 }