mesa
GetOpenGLStateTrackerApi()SynopsisAPTR GetOpenGLStateTrackerApi( ) FunctionThis is a PRIVATE function used by egl.library to receive pointer to api structure of OpenGL. Do not use this function in your application. glACreateContext()SynopsisGLAContext glACreateContext( struct TagItem *tagList) FunctionCrates a GL rendering context that can be later used in subsequent calls. InputstagList - a pointer to tags to be used during creation. Tags
GLA_Left - specifies the left rendering offset on the rastport.
Typically equals to window->BorderLeft.
GLA_Top - specifies the top rendering offset on the rastport.
Typically equals to window->BorderTop.
GLA_Right - specifies the right rendering offset on the rastport.
Typically equals to window->BorderRight.
GLA_Bottom - specifies the bottom rendering offset on the rastport.
Typically equals to window->BorderBottom.
GLA_Width - specifies the width of the rendering area.
GLA_Width + GLA_Left + GLA_Right should equal the width of
the rastport. The GLA_Width is interchangable at cration
time with GLA_Right. Later durring window resizing, width
is calculated from scalled left, righ and window width.
GLA_Height - specifies the height of the rendering area.
GLA_Height + GLA_Top + GLA_Bottom should equal the height
of the rastport. The GLA_Height is interchangable at
cration time with GLA_Bottom. Later durring window resizing
, height is calculated from scalled top, bottom and window
height.
GLA_Screen - pointer to Screen onto which scene is to be rendered. When
selecting RastPort has lower priority than GLA_Window.
GLA_Window - pointer to Window onto which scene is to be rendered. Must
be provided.
GLA_RastPort - ignored. Use GLA_Window.
GLA_DoubleBuf - ignored. All rendering is always double buffered.
GLA_RGBMode - ignored. All rendering is done in RGB. Indexed modes are
not supported.
GLA_AlphaFlag - ignored. All rendering is done with alpha channel.
GLA_NoDepth - disables the depth/Z buffer. Depth buffer is enabled by
default and is 16 or 24 bit based on rendering
capabilities.
GLA_NoStencil - disables the stencil buffer. Stencil buffer is enabled
by default.
GLA_NoAccum - disables the accumulation buffer. Accumulation buffer is
enabled by default.
ResultA valid GL context or NULL of creation was not succesfull. glADestroyContext()Synopsisvoid glADestroyContext( GLAContext ctx) FunctionDestroys the GL rendering context and frees all resoureces. Inputs
ctx - pointer to GL rendering context. A NULL pointer will be
ignored.
ResultThe GL context is destroyed. Do no use it anymore. glAGetConfig()Synopsisvoid glAGetConfig( GLAContext ctx, GLenum pname, GLint * params) FunctionGets value of selected parameter Inputspname - enum value of parameter params - pointer to integer where the value is to be put ResultNone glAGetCurrentContext()SynopsisGLAContext glAGetCurrentContext( ) FunctionReturns the currently selected GL rendering context. ResultThe GL rendering context which is currently active. glAGetProcAddress()SynopsisGLAProc glAGetProcAddress( const GLubyte * procname) ResultPointer to procname function or NULL if function is not supported glAMakeCurrent()Synopsisvoid glAMakeCurrent( GLAContext ctx) FunctionMake the selected GL rendering context active. Inputs
ctx - GL rendering context to be made active for all following GL
calls.
glASetRast()Synopsisvoid glASetRast( GLAContext ctx, struct TagItem * tagList) FunctionSets a new rendering target for an existing context Inputsctx - tagList - a pointer to tags to be used during creation. Tags
GLA_Window - pointer to Window onto which scene is to be rendered. Must
be provided.
ResultNone glASwapBuffers()Synopsisvoid glASwapBuffers( GLAContext ctx) FunctionSwaps the back with front buffers. MUST BE used to display the effect of rendering onto the target RastPort, since GLA always work in double buffer mode. Inputsctx - GL rendering context on which swap is to be performed. |
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