void Video_DX9::init_context() {
    // Enable Alpha Blitting
    m_d3d_device->SetRenderState(D3DRS_ALPHABLENDENABLE, true);
    m_d3d_device->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
    m_d3d_device->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
    m_d3d_device->SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD);

    // Configure Texture Stages
    m_d3d_device->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_DIFFUSE);
    m_d3d_device->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_TEXTURE);
    m_d3d_device->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_DIFFUSE);
    m_d3d_device->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_TEXTURE);

    // Set Lighting Variables
    m_d3d_device->SetRenderState(D3DRS_NORMALIZENORMALS, true);

    // Multisampling
    m_d3d_device->SetRenderState(D3DRS_MULTISAMPLEANTIALIAS, DWORD(get_multisampling() > 1));

    // More basic stuff
    set_2d();
    set_color(get_color());
    set_clear_color(get_clear_color());
    set_backface_culling(get_backface_culling());
    set_lighting(get_lighting());
    set_ambient_lighting(get_ambient_lighting());
    set_alpha_test(is_alpha_test_enabled(), get_alpha_test_function(), get_alpha_test_value());
    set_zwrite(is_zwrite_enabled());
    set_ztest(is_ztest_enabled());
  }
Exemple #2
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  void Video_GL::init() {
    std::cout << "Initializing OpenGL" << std::endl;

    //double buffer, no stencil, no accumulation buffer
    SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
    SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
    SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
    SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
    SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
    SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE, 0);
    SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE, 0);
    SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE, 0);
    SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE, 0);

    if(get_multisampling() > 1) {
      SDL_GL_SetAttribute (SDL_GL_MULTISAMPLESAMPLES, get_multisampling());
      SDL_GL_SetAttribute (SDL_GL_MULTISAMPLEBUFFERS, 1);
    }

    set_opengl_flag(true);
    Video::init();

#if SDL_VERSION_ATLEAST(1,3,0)
    m_context = SDL_GL_CreateContext(get_window());
#endif

    {
      const GLenum err = glewInit();
      if(GLEW_OK != err) {
        std::cerr << "GLEW Error: " << glewGetErrorString(err) << std::endl;
        throw Video_Init_Failure();
      }
    }

    // Set Fill/Shade Mode
    glShadeModel(GL_SMOOTH);
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    glEnable(GL_NORMALIZE); //GL_RESCALE_NORMALIZE);

    // Enable Alpha Blitting
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    //glBlendEquation(GL_FUNC_ADD); // default // would require ARB ext

    // Set lighting variables
    glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
    glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
    if(glGetError() == GL_INVALID_ENUM)
      std::cerr << "Quality Warning:  Your graphics card does not support separate specular lighting in OpenGL.\n";

    // Initialize Assorted Variables
    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    //glPointSize(static_cast<GLfloat>(sqrt(pow(double(get_screen_width()), 2.) * pow(double(get_screen_height()), 2.)) / 1000000));
    //glLineWidth(static_cast<GLfloat>(sqrt(pow(double(get_screen_width()), 2.) * pow(double(get_screen_height()), 2.)) / 1000000));

    // Finish with a few function calls
    set_2d();
    set_color(get_color());
    set_clear_color(get_clear_color());
    set_backface_culling(get_backface_culling());
    set_lighting(get_lighting());
    set_ambient_lighting(get_ambient_lighting());
    set_alpha_test(is_alpha_test_enabled(), get_alpha_test_function(), get_alpha_test_value());
    set_zwrite(is_zwrite_enabled());
    set_ztest(is_ztest_enabled());

    union {
      void * v;
#ifdef _LINUX
      PFNGLXSWAPINTERVALEXTPROC pglSwapIntervalEXT;
      PFNGLXSWAPINTERVALSGIPROC pglSwapIntervalSGI;
#endif
      PFNGLBINDBUFFERARBPROC pglBindBufferARB;
      PFNGLDELETEBUFFERSARBPROC pglDeleteBuffersARB;
      PFNGLGENBUFFERSARBPROC pglGenBuffersARB;
      PFNGLBUFFERDATAARBPROC pglBufferDataARB;
    } ptr;

#ifdef _LINUX
    ptr.v = SDL_GL_GetProcAddress("glXSwapIntervalEXT");
    if(!ptr.v)
      ptr.v = SDL_GL_GetProcAddress("wglSwapIntervalEXT");
    m_pglSwapIntervalEXT = ptr.pglSwapIntervalEXT;

    ptr.v = SDL_GL_GetProcAddress("glXSwapIntervalSGI");
    if(!ptr.v)
      ptr.v = SDL_GL_GetProcAddress("wglSwapIntervalSGI");
    m_pglSwapIntervalSGI = ptr.pglSwapIntervalSGI;
#endif

    // Has to be done after finding the function pointer
    set_vertical_sync(get_vertical_sync());

    m_vertex_buffers = strstr(reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)), "ARB_vertex_buffer_object") != 0;
    if(m_vertex_buffers) {
      ptr.v = SDL_GL_GetProcAddress("glBindBufferARB");
      m_pglBindBufferARB = ptr.pglBindBufferARB;

      ptr.v = SDL_GL_GetProcAddress("glDeleteBuffersARB");
      m_pglDeleteBuffersARB = ptr.pglDeleteBuffersARB;

      ptr.v = SDL_GL_GetProcAddress("glGenBuffersARB");
      m_pglGenBuffersARB = ptr.pglGenBuffersARB;

      ptr.v = SDL_GL_GetProcAddress("glBufferDataARB");
      m_pglBufferDataARB = ptr.pglBufferDataARB;
    }
    else
      std::cerr << "Performance Warning:  Your graphics card does not offer Vertex Buffer Objects (VBO) in OpenGL.\n";

    if(strstr((char*)glGetString(GL_EXTENSIONS), "GL_EXT_texture_filter_anisotropic"))
      glGetIntegerv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, reinterpret_cast<GLint *>(&m_maximum_anisotropy));
    else
      m_maximum_anisotropy = 0;
  }