gui/sdl/sdl_ogl_glue.cpp

   1 //
   2 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010,
   3 //   2011 Free Software Foundation, Inc
   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; either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18
  19 #include "opengl/Renderer_ogl.h"
  20 #include "tu_opengl_includes.h"
  21 #include "SDL.h"
  22 #include "sdl_ogl_glue.h"
  23
  24 #include "log.h"
  25
  26 #define OVERSIZE 1.0f
  27
  28 using namespace std;
  29
  30 namespace gnash
  31 {
  32
  33 SdlOglGlue::SdlOglGlue()
  34 {
  35 //    GNASH_REPORT_FUNCTION;
  36 }
  37
  38 SdlOglGlue::~SdlOglGlue()
  39 {
  40 //    GNASH_REPORT_FUNCTION;
  41
  42 }
  43
  44 bool SdlOglGlue::init(int /*argc*/, char ** /*argv*/ [])
  45 {
  46 //    GNASH_REPORT_FUNCTION;
  47     return true;
  48 }
  49
  50
  51 Renderer*
  52 SdlOglGlue::createRenderHandler(int depth)
  53 {
  54 //    GNASH_REPORT_FUNCTION;
  55
  56     _bpp = depth;
  57
  58     Renderer* renderer = renderer::opengl::create_handler();
  59
  60     return renderer;
  61 }
  62
  63 /// Not implemented, Fixme
  64 void
  65 SdlOglGlue::setInvalidatedRegions(const InvalidatedRanges& /*ranges*/)
  66 {
  67 }
  68
  69 bool
  70 SdlOglGlue::prepDrawingArea(int width, int height, std::uint32_t sdl_flags)
  71 {
  72     if (_bpp == 16) {
  73       // 16-bit color, surface creation is likely to succeed.
  74       SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
  75       SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
  76       SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
  77       SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 15);
  78       SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
  79       SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
  80     } else {
  81       assert(_bpp == 32);
  82
  83       // 32-bit color etc, for getting dest alpha,
  84       // for MULTIPASS_ANTIALIASING (see
  85       // Renderer_ogl.cpp).
  86       SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
  87       SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
  88       SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
  89       SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
  90       SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
  91       SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
  92       SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
  93     }
  94
  95     SDL_SetVideoMode(width, height, _bpp, sdl_flags | SDL_OPENGL);
  96
  97      // Turn on alpha blending.
  98     glEnable(GL_BLEND);
  99     glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 100
 101     // Turn on line smoothing.  Antialiased lines can be used to
 102     // smooth the outsides of shapes.
 103     glEnable(GL_LINE_SMOOTH);
 104     glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); // GL_NICEST, GL_FASTEST, GL_DONT_CARE
 105     glMatrixMode(GL_PROJECTION);
 106
 107
 108     glOrtho(-OVERSIZE, OVERSIZE, OVERSIZE, -OVERSIZE, -1, 1);
 109     glMatrixMode(GL_MODELVIEW);
 110     glLoadIdentity();
 111
 112     // We don't need lighting effects
 113     glDisable(GL_LIGHTING);
 114     glPushAttrib (GL_ALL_ATTRIB_BITS);
 115
 116     return true;
 117 }
 118
 119 void
 120 SdlOglGlue::render()
 121 {
 122 //    GNASH_REPORT_FUNCTION;
 123     SDL_GL_SwapBuffers();
 124 }
 125
 126
 127
 128 } // namespace gnash