/*
* Return the color buffer associated with an OSMesa context.
* Input: c - the OSMesa context
* Output: width, height - size of buffer in pixels
* format - buffer format (OSMESA_FORMAT)
* buffer - pointer to depth buffer values
* Return: GL_TRUE or GL_FALSE to indicate success or failure.
*
* New in Mesa 3.3.
*/
func GetColorBuffer(c Context, width *int, height *int,
format *Format, buffer *unsafe.Pointer) {
var width_ C.GLint
var height_ C.GLint
var format_ C.GLint
var buffer_ unsafe.Pointer
C.OSMesaGetDepthBuffer(C.OSMesaContext(c), &width_, &height_,
&format_, &buffer_)
*width = int(width_)
*height = int(height_)
*format = Format(format_)
*buffer = buffer_
}
/*
* Return the depth buffer associated with an OSMesa context.
* Input: c - the OSMesa context
* Output: width, height - size of buffer in pixels
* bytesPerValue - bytes per depth value (2 or 4)
* buffer - pointer to depth buffer values
* Return: GL_TRUE or GL_FALSE to indicate success or failure.
*
* New in Mesa 2.4.
*/
func GetDepthBuffer(c Context, width *int, height *int,
bytesPerValue *int, buffer *unsafe.Pointer) {
var width_ C.GLint
var height_ C.GLint
var bytesPerValue_ C.GLint
var buffer_ unsafe.Pointer
C.OSMesaGetDepthBuffer(C.OSMesaContext(c), &width_, &height_,
&bytesPerValue_, &buffer_)
*width = int(width_)
*height = int(height_)
*bytesPerValue = int(bytesPerValue_)
*buffer = buffer_
}
/*
* Bind an osmesa.Context to an image buffer. The image buffer is just a
* block of memory which the client provides. Its size must be at least
* as large as width*height*sizeof(type). Its address should be a multiple
* of 4 if using RGBA mode.
*
* Image data is stored in the order of glDrawPixels: row-major order
* with the lower-left image pixel stored in the first array position
* (ie. bottom-to-top).
*
* Since the only type initially supported is GL_UNSIGNED_BYTE, if the
* context is in RGBA mode, each pixel will be stored as a 4-byte RGBA
* value. If the context is in color indexed mode, each pixel will be
* stored as a 1-byte value.
*
* If the context's viewport hasn't been initialized yet, it will now be
* initialized to (0,0,width,height).
*
* Input: ctx - the rendering context
* buffer - the image buffer memory
* type - data type for pixel components, only GL_UNSIGNED_BYTE
* supported now
* width, height - size of image buffer in pixels, at least 1
* Return: GL_TRUE if success, GL_FALSE if error because of invalid ctx,
* invalid buffer address, type!=GL_UNSIGNED_BYTE, width<1, height<1,
* width>internal limit or height>internal limit.
*/
func MakeCurrent(ctx Context, buffer unsafe.Pointer, type_ PixelType,
width int, height int) bool {
return 0 != C.OSMesaMakeCurrent(C.OSMesaContext(ctx), buffer, C.GLenum(type_),
C.GLsizei(width), C.GLsizei(height))
}
/*
* Destroy an Off-Screen Mesa rendering context.
*
* Input: ctx - the context to destroy
*/
func DestroyContext(ctx Context) {
C.OSMesaDestroyContext(C.OSMesaContext(ctx))
}
/*
* Create an Off-Screen Mesa rendering context and specify desired
* size of depth buffer, stencil buffer and accumulation buffer.
* If you specify zero for depthBits, stencilBits, accumBits you
* can save some memory.
*
* New in Mesa 3.5
*/
func CreateContextExt(format Format, depthBits int, stencilBits int,
accumBits int, sharelist Context) Context {
return Context(C.OSMesaCreateContextExt(C.GLenum(format), C.GLint(depthBits), C.GLint(stencilBits),
C.GLint(accumBits), C.OSMesaContext(sharelist)))
}
/*
* Create an Off-Screen Mesa rendering context. The only attribute needed is
* an RGBA vs Color-Index mode flag.
*
* Input: format - one of OSMESA_COLOR_INDEX, OSMESA_RGBA, OSMESA_BGRA,
* OSMESA_ARGB, OSMESA_RGB, or OSMESA_BGR.
* sharelist - specifies another osmesa.Context with which to share
* display lists. NULL indicates no sharing.
* Return: an osmesa.Context or 0 if error
*/
func CreateContext(format Format, sharelist Context) Context {
return Context(C.OSMesaCreateContext(C.GLenum(format), C.OSMesaContext(sharelist)))
}
