Small OpenGL based c++ rendering library
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gldrawhelper.cpp 1.5KB

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  1. /* libsegl - Sebas Extended GL Library
  2. * Collection of Opengl/3D-Math helpers
  3. *
  4. * Copyright (c) 2008 by Sebastian Lohff, seba@seba-geek.de
  5. * http://www.seba-geek.de
  6. *
  7. * This library is free software; you can redistribute it and/or
  8. * modify it under the terms of the GNU Library General Public
  9. * License as published by the Free Software Foundation; either
  10. * version 2 of the License, or (at your option) any later version.
  11. *
  12. * This library is distributed in the hope that it will be useful,
  13. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15. * Library General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU Library General Public
  18. * License along with this library; if not, write to the
  19. * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  20. * Boston, MA 02110-1301, USA.
  21. */
  22. #include "gldrawhelper.h"
  23. namespace segl {
  24. void GLDrawSDLRect(SDL_Rect *rect, Rect *tex) {
  25. Rect tmptex;
  26. if(tex) {
  27. tmptex = *tex;
  28. } else {
  29. tmptex.set(0.0f, 0.0f, 1.0f, 1.0f);
  30. }
  31. glBegin(GL_QUADS);
  32. glTexCoord2f(tmptex.x, tmptex.y);
  33. glVertex2i(rect->x, rect->y+rect->h);
  34. glTexCoord2f(tmptex.x+tmptex.w, tmptex.y);
  35. glVertex2i(rect->x+rect->w, rect->y+rect->h);
  36. glTexCoord2f(tmptex.x+tmptex.w, tmptex.y+tmptex.h);
  37. glVertex2i(rect->x+rect->w, rect->y);
  38. glTexCoord2f(tmptex.x, tmptex.y+tmptex.h);
  39. glVertex2i(rect->x, rect->y);
  40. glEnd();
  41. }
  42. } // namespace segl