1 | // Copyright (C) 2012-2013 Kornel Kisielewicz
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2 | // This file is part of NV Libraries.
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3 | // For conditions of distribution and use, see copyright notice in nv.hh
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4 |
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5 | #include "nv/gl/gl_context.hh"
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6 |
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7 | #include "nv/gl/gl_enum.hh"
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8 | #include "nv/lib/gl.hh"
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9 | #include "nv/lib/sdl.hh"
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10 |
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11 | using namespace nv;
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12 |
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13 | void gl_context::clear( const clear_state& cs )
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14 | {
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15 | // apply_framebuffer
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16 |
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17 | apply_scissor_test( cs.scissor_test );
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18 | apply_color_mask( cs.color_mask );
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19 | apply_depth_mask( cs.depth_mask );
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20 | // stencil_mask_separate
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21 |
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22 | if ( m_clear_color != cs.color )
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23 | {
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24 | glClearColor( cs.color.r, cs.color.g, cs.color.b, cs.color.a );
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25 | m_clear_color = cs.color;
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26 | }
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27 |
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28 | if ( m_clear_depth != cs.depth )
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29 | {
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30 | glClearDepth( cs.depth );
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31 | m_clear_depth = cs.depth;
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32 | }
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33 |
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34 | if ( m_clear_stencil != cs.stencil )
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35 | {
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36 | glClearStencil( cs.stencil );
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37 | m_clear_stencil = cs.stencil;
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38 | }
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39 |
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40 | glClear( clear_state_buffers_to_mask( cs.buffers ) );
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41 | }
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42 |
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43 | const ivec4& gl_context::get_viewport()
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44 | {
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45 | return m_viewport;
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46 | }
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47 |
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48 | void gl_context::set_viewport( const ivec4& viewport )
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49 | {
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50 | if ( viewport.z < 0 || viewport.w < 0 )
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51 | {
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52 | NV_THROW( logic_error, "viewport width and height must be greater than zero!");
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53 | }
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54 |
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55 | m_viewport = viewport;
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56 | glViewport( viewport.x, viewport.y, viewport.z, viewport.w );
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57 | }
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58 |
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59 | void gl_context::enable( unsigned int what, bool value )
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60 | {
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61 | if ( value )
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62 | {
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63 | glEnable( what );
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64 | }
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65 | else
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66 | {
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67 | glDisable( what );
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68 | }
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69 | }
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70 |
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71 | void gl_context::apply_stencil_test( const stencil_test& stencil )
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72 | {
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73 | if ( m_render_state.stencil_test.enabled != stencil.enabled )
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74 | {
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75 | enable( GL_STENCIL_TEST, stencil.enabled );
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76 | m_render_state.stencil_test.enabled = stencil.enabled;
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77 | }
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78 |
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79 | if ( stencil.enabled )
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80 | {
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81 | apply_stencil_face( GL_FRONT, m_render_state.stencil_test.front_face, stencil.front_face );
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82 | apply_stencil_face( GL_BACK, m_render_state.stencil_test.back_face, stencil.back_face );
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83 | }
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84 | }
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85 |
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86 | void gl_context::apply_stencil_face( unsigned face, stencil_test_face& stencil, const stencil_test_face& new_stencil )
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87 | {
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88 | if (( stencil.op_fail != new_stencil.op_fail ) ||
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89 | ( stencil.op_depth_fail != new_stencil.op_depth_fail ) ||
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90 | ( stencil.op_depth_pass != new_stencil.op_depth_pass ) )
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91 | {
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92 | glStencilOpSeparate( face,
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93 | stencil_operation_to_enum( new_stencil.op_fail ),
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94 | stencil_operation_to_enum( new_stencil.op_depth_fail ),
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95 | stencil_operation_to_enum( new_stencil.op_depth_pass )
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96 | );
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97 |
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98 | stencil.op_fail = new_stencil.op_fail;
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99 | stencil.op_depth_fail = new_stencil.op_depth_fail;
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100 | stencil.op_depth_pass = new_stencil.op_depth_pass;
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101 | }
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102 |
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103 | if (( stencil.function != new_stencil.function ) ||
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104 | ( stencil.ref_value != new_stencil.ref_value ) ||
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105 | ( stencil.mask != new_stencil.mask ))
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106 | {
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107 | glStencilFuncSeparate( face,
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108 | stencil_function_to_enum( new_stencil.function ),
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109 | new_stencil.ref_value,
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110 | new_stencil.mask
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111 | );
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112 |
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113 | stencil.function = new_stencil.function;
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114 | stencil.ref_value = new_stencil.ref_value;
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115 | stencil.mask = new_stencil.mask;
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116 | }
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117 | }
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118 |
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119 | void gl_context::apply_scissor_test( const scissor_test& scissor )
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120 | {
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121 | if ( m_render_state.scissor_test.enabled != scissor.enabled )
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122 | {
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123 | enable( GL_SCISSOR_TEST, scissor.enabled );
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124 | m_render_state.scissor_test.enabled = scissor.enabled;
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125 | }
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126 |
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127 | if ( scissor.dim.x < 0 || scissor.dim.y < 0 )
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128 | {
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129 | NV_THROW( logic_error, "scissor_test.rect width and height must be greater than zero!" );
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130 | }
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131 |
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132 | if ( scissor.enabled )
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133 | {
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134 | if ( m_render_state.scissor_test.dim != scissor.dim || m_render_state.scissor_test.pos != scissor.pos )
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135 | {
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136 | glScissor(
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137 | scissor.pos.x, scissor.pos.y,
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138 | scissor.dim.x, scissor.dim.y
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139 | );
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140 | m_render_state.scissor_test.dim = scissor.dim;
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141 | m_render_state.scissor_test.pos = scissor.pos;
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142 | }
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143 | }
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144 | }
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145 |
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146 | void gl_context::apply_depth_test( const depth_test& depth )
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147 | {
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148 | if ( m_render_state.depth_test.enabled != depth.enabled )
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149 | {
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150 | enable( GL_DEPTH_TEST, depth.enabled );
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151 | m_render_state.depth_test.enabled = depth.enabled;
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152 | }
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153 |
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154 | if ( depth.enabled )
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155 | {
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156 | if ( m_render_state.depth_test.function != depth.function )
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157 | {
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158 | glDepthFunc( depth_state_function_to_enum( depth.function ) );
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159 | m_render_state.depth_test.function = depth.function;
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160 | }
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161 | }
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162 | }
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163 |
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164 | void gl_context::apply_depth_mask( bool mask )
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165 | {
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166 | if ( m_render_state.depth_mask != mask )
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167 | {
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168 | glDepthMask( mask );
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169 | m_render_state.depth_mask = mask;
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170 | }
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171 | }
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172 |
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173 | void gl_context::apply_polygon_mode( const polygon_mode& mode )
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174 | {
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175 | if ( m_render_state.polygon_mode.fill != mode.fill )
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176 | {
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177 | glPolygonMode( GL_FRONT_AND_BACK, polygon_mode_fill_to_enum( mode.fill ) );
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178 | m_render_state.polygon_mode.fill = mode.fill;
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179 | }
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180 | }
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181 |
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182 |
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183 | void gl_context::apply_depth_range( const depth_range& range )
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184 | {
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185 | if ( range.near < 0.0 || range.near > 1.0 )
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186 | {
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187 | NV_THROW( logic_error, "render_state.depth_range.near must be between zero and one!");
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188 | }
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189 | if ( range.far < 0.0 || range.far > 1.0 )
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190 | {
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191 | NV_THROW( logic_error, "render_state.depth_range.far must be between zero and one!");
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192 | }
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193 |
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194 | if ((m_render_state.depth_range.far != range.far) ||
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195 | (m_render_state.depth_range.near != range.near))
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196 | {
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197 | glDepthRange( range.near, range.far );
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198 |
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199 | m_render_state.depth_range.far = range.far;
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200 | m_render_state.depth_range.near = range.near;
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201 | }
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202 | }
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203 |
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204 | void gl_context::apply_color_mask( const color_mask& mask )
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205 | {
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206 | if ( m_render_state.color_mask != mask )
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207 | {
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208 | glColorMask( mask.red, mask.green, mask.blue, mask.alpha );
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209 | m_render_state.color_mask = mask;
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210 | }
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211 | }
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212 |
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213 | void gl_context::apply_blending( const blending& blend )
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214 | {
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215 | if ( m_render_state.blending.enabled != blend.enabled )
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216 | {
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217 | enable( GL_BLEND, blend.enabled );
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218 | m_render_state.blending.enabled = blend.enabled;
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219 | }
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220 |
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221 | if ( blend.enabled )
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222 | {
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223 | if ((m_render_state.blending.src_rgb_factor != blend.src_rgb_factor ) ||
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224 | (m_render_state.blending.dst_rgb_factor != blend.dst_rgb_factor ) ||
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225 | (m_render_state.blending.src_alpha_factor != blend.src_alpha_factor ) ||
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226 | (m_render_state.blending.dst_alpha_factor != blend.dst_alpha_factor ))
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227 | {
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228 | glBlendFuncSeparate(
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229 | blending_factor_to_enum( blend.src_rgb_factor ),
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230 | blending_factor_to_enum( blend.dst_rgb_factor ),
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231 | blending_factor_to_enum( blend.src_alpha_factor ),
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232 | blending_factor_to_enum( blend.dst_alpha_factor )
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233 | );
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234 |
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235 | m_render_state.blending.src_rgb_factor = blend.src_rgb_factor;
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236 | m_render_state.blending.dst_rgb_factor = blend.dst_rgb_factor;
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237 | m_render_state.blending.src_alpha_factor = blend.src_alpha_factor;
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238 | m_render_state.blending.dst_alpha_factor = blend.dst_alpha_factor;
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239 | }
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240 |
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241 | if ((m_render_state.blending.rgb_equation != blend.rgb_equation ) ||
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242 | (m_render_state.blending.alpha_equation != blend.alpha_equation ))
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243 | {
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244 | glBlendEquationSeparate(
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245 | blending_equation_to_enum( blend.rgb_equation ),
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246 | blending_equation_to_enum( blend.alpha_equation )
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247 | );
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248 |
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249 | m_render_state.blending.rgb_equation = blend.rgb_equation;
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250 | m_render_state.blending.alpha_equation = blend.alpha_equation;
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251 | }
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252 |
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253 | if (( m_render_state.blending.color != blend.color ))
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254 | {
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255 | glBlendColor( blend.color.r, blend.color.g, blend.color.b, blend.color.a );
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256 | m_render_state.blending.color = blend.color;
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257 | }
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258 | }
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259 | }
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260 |
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261 |
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262 | void gl_context::apply_culling( const culling& cull )
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263 | {
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264 | if ( m_render_state.culling.enabled != cull.enabled )
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265 | {
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266 | enable( GL_CULL_FACE, cull.enabled );
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267 | m_render_state.culling.enabled = cull.enabled;
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268 | }
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269 |
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270 | if ( cull.enabled )
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271 | {
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272 | if ( m_render_state.culling.face != cull.face )
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273 | {
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274 | glCullFace( culling_face_type_to_enum(cull.face) );
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275 | m_render_state.culling.face = cull.face;
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276 | }
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277 |
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278 | if ( m_render_state.culling.order != cull.order )
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279 | {
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280 | glFrontFace( culling_order_type_to_enum( cull.order ) );
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281 | m_render_state.culling.order = cull.order;
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282 | }
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283 | }
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284 | }
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285 |
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286 |
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287 | void gl_context::force_apply_render_state( const render_state& state )
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288 | {
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289 | enable( GL_CULL_FACE, state.culling.enabled );
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290 | glCullFace( culling_face_type_to_enum( state.culling.face ) );
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291 | glFrontFace( culling_order_type_to_enum( state.culling.order ) );
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292 |
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293 | enable( GL_SCISSOR_TEST, state.scissor_test.enabled );
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294 | glScissor(
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295 | state.scissor_test.pos.x, state.scissor_test.pos.y,
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296 | state.scissor_test.dim.x, state.scissor_test.dim.y
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297 | );
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298 |
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299 | enable( GL_STENCIL_TEST, state.stencil_test.enabled );
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300 | force_apply_stencil_face( GL_FRONT, state.stencil_test.front_face );
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301 | force_apply_stencil_face( GL_BACK, state.stencil_test.back_face );
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302 |
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303 | enable( GL_DEPTH_TEST, state.depth_test.enabled );
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304 | glDepthFunc( depth_state_function_to_enum( state.depth_test.function ) );
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305 | glDepthRange( state.depth_range.near, state.depth_range.far );
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306 |
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307 | enable( GL_BLEND, state.blending.enabled );
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308 | glBlendFuncSeparate(
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309 | blending_factor_to_enum( state.blending.src_rgb_factor ),
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310 | blending_factor_to_enum( state.blending.dst_rgb_factor ),
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311 | blending_factor_to_enum( state.blending.src_alpha_factor ),
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312 | blending_factor_to_enum( state.blending.dst_alpha_factor )
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313 | );
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314 | glBlendEquationSeparate(
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315 | blending_equation_to_enum( state.blending.rgb_equation ),
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316 | blending_equation_to_enum( state.blending.alpha_equation )
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317 | );
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318 | glBlendColor(
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319 | state.blending.color.r, state.blending.color.g,
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320 | state.blending.color.b, state.blending.color.a
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321 | );
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322 |
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323 | glDepthMask( state.depth_mask );
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324 | glColorMask(
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325 | state.color_mask.red, state.color_mask.green,
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326 | state.color_mask.blue, state.color_mask.alpha
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327 | );
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328 | glPolygonMode( GL_FRONT_AND_BACK, polygon_mode_fill_to_enum( state.polygon_mode.fill ) );
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329 | }
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330 |
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331 | void gl_context::force_apply_stencil_face( unsigned face, const stencil_test_face& stencil )
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332 | {
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333 | glStencilOpSeparate( face,
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334 | stencil_operation_to_enum( stencil.op_fail ),
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335 | stencil_operation_to_enum( stencil.op_depth_fail ),
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336 | stencil_operation_to_enum( stencil.op_depth_pass )
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337 | );
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338 |
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339 | glStencilFuncSeparate( face,
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340 | stencil_function_to_enum( stencil.function ),
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341 | stencil.ref_value,
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342 | stencil.mask
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343 | );
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344 | }
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345 |
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346 |
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347 | void gl_context::apply_render_state( const render_state& state )
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348 | {
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349 | // apply_primitive_restart
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350 | apply_culling( state.culling );
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351 | // apply_program_point_size
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352 | // apply_rasterization_mode
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353 | apply_scissor_test( state.scissor_test );
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354 | apply_stencil_test( state.stencil_test );
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355 | apply_depth_test( state.depth_test );
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356 | apply_depth_range( state.depth_range );
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357 | apply_blending( state.blending );
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358 | apply_color_mask( state.color_mask );
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359 | apply_depth_mask( state.depth_mask );
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360 | apply_polygon_mode( state.polygon_mode );
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361 | }
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362 |
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363 |
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364 | gl_context::gl_context( device* a_device )
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365 | : context( a_device )
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366 | {
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367 | }
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368 |
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369 |
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370 | nv::gl_context::~gl_context()
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371 | {
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372 | }
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373 |
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374 |
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375 | void gl_context::draw( primitive prim, const render_state& rs, program* p, vertex_array* va, size_t count )
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376 | {
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377 | apply_render_state( rs );
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378 | if ( count > 0 )
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379 | {
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380 | p->bind();
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381 | va->bind();
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382 | if ( va->has_index_buffer() )
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383 | {
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384 | glDrawElements( primitive_to_enum(prim), static_cast<GLsizei>( count ), datatype_to_gl_enum( va->get_index_buffer_type() ), 0 );
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385 | }
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386 | else
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387 | {
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388 | glDrawArrays( primitive_to_enum(prim), 0, static_cast<GLsizei>( count ) );
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389 | }
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390 | va->unbind();
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391 | p->unbind();
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392 | }
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393 | }
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394 |
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395 | nv::sdl_gl_context::sdl_gl_context( device* a_device, void* a_sdl_win_handle )
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396 | : gl_context( a_device ), m_handle( nullptr )
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397 | {
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398 | #if NV_SDL_VERSION == NV_SDL_20
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399 | m_handle = SDL_GL_CreateContext( static_cast<SDL_Window*>( a_sdl_win_handle ) );
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400 |
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401 | if ( m_handle == 0 )
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402 | {
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403 | NV_LOG( LOG_CRITICAL, "GL Context creation failed: " << SDL_GetError( ) );
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404 | return; // TODO: Error report
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405 | }
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406 | #else
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407 | NV_UNUSED( a_win_handle );
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408 | NV_UNUSED( m_handle );
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409 | #endif
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410 |
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411 | nv::load_gl_library();
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412 | NV_LOG( LOG_INFO, "OpenGL Vendor : " << glGetString(GL_VENDOR) );
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413 | NV_LOG( LOG_INFO, "OpenGL Renderer : " << glGetString(GL_RENDERER) );
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414 | NV_LOG( LOG_INFO, "OpenGL Version : " << glGetString(GL_VERSION) );
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415 | NV_LOG( LOG_INFO, "OpenGL GLSL Version : " << glGetString(GL_SHADING_LANGUAGE_VERSION) );
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416 | #if NV_SDL_VERSION == NV_SDL_20
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417 | // SDL_GL_SetSwapInterval(1);
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418 | #endif
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419 |
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420 | // TODO: do we really need this?
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421 | glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
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422 |
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423 | force_apply_render_state( m_render_state );
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424 | }
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425 |
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426 | nv::sdl_gl_context::~sdl_gl_context()
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427 | {
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428 | #if NV_SDL_VERSION == NV_SDL_20
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429 | SDL_GL_DeleteContext(static_cast<SDL_GLContext>( m_handle ) );
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430 | #endif
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431 | }
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432 |
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433 | nv::native_gl_context::native_gl_context( device* a_device, void* a_native_win_handle )
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434 | : gl_context( a_device ), m_handle( nullptr )
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435 | {
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436 | #if NV_PLATFORM == NV_WINDOWS
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437 |
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438 | // TODO: error checking
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439 | HDC hdc = (HDC)a_native_win_handle;
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440 |
|
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441 | const int wgl_attrib_list[] =
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442 | {
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443 | WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
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444 | WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
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445 | WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
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446 | WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
|
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447 | WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
|
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448 | WGL_COLOR_BITS_ARB, 32,
|
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449 | WGL_DEPTH_BITS_ARB, 24,
|
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450 | WGL_STENCIL_BITS_ARB, 8,
|
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451 | 0, 0 //End
|
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452 | };
|
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453 |
|
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454 | unsigned int num_formats;
|
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455 | int pixel_format;
|
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456 | PIXELFORMATDESCRIPTOR pfd;
|
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457 |
|
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458 | if ( FALSE == wglChoosePixelFormatARB(hdc, wgl_attrib_list, NULL, 1, &pixel_format, &num_formats) )
|
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459 | {
|
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460 | return;
|
---|
461 | }
|
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462 |
|
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463 | if ( FALSE == SetPixelFormat(hdc, pixel_format, &pfd) )
|
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464 | {
|
---|
465 | //int err = GetLastError();
|
---|
466 | return;
|
---|
467 | }
|
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468 |
|
---|
469 | int attribs[] =
|
---|
470 | {
|
---|
471 | WGL_CONTEXT_MAJOR_VERSION_ARB, 2,
|
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472 | WGL_CONTEXT_MINOR_VERSION_ARB, 1,
|
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473 | WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
|
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474 | //WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB,
|
---|
475 | 0, 0 //End
|
---|
476 | };
|
---|
477 |
|
---|
478 | HGLRC handle;
|
---|
479 | if ( 0 == (handle = wglCreateContextAttribsARB(hdc, 0, attribs) ) )
|
---|
480 | {
|
---|
481 | return;
|
---|
482 | }
|
---|
483 |
|
---|
484 | if ( FALSE == dynwglMakeCurrent( hdc, handle ) )
|
---|
485 | {
|
---|
486 | return;
|
---|
487 | }
|
---|
488 |
|
---|
489 | m_handle = (void*)handle;
|
---|
490 | #else
|
---|
491 | NV_ASSERT( false, "Native GL context not implemented for this platform!" );
|
---|
492 | #endif
|
---|
493 | force_apply_render_state( m_render_state );
|
---|
494 | }
|
---|
495 |
|
---|
496 | nv::native_gl_context::~native_gl_context()
|
---|
497 | {
|
---|
498 | #if NV_PLATFORM == NV_WINDOWS
|
---|
499 | dynwglDeleteContext( (HGLRC)m_handle );
|
---|
500 | #endif
|
---|
501 | }
|
---|