/*
* Bind an OSMesaContext 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.
*/
GLboolean OSMesaMakeCurrent( OSMesaContext ctx, void *buffer, GLenum type,
GLsizei width, GLsizei height )
{
if (!ctx || !buffer || type!=GL_UNSIGNED_BYTE
|| width<1 || height<1 || width>MAX_WIDTH || height>MAX_HEIGHT) {
return GL_FALSE;
}
gl_make_current( ctx->gl_ctx, ctx->gl_buffer );
ctx->buffer = buffer;
ctx->width = width;
ctx->height = height;
if (ctx->rowlength==0) {
ctx->rowlength = width;
}
osmesa_setup_DD_pointers( ctx->gl_ctx );
#ifdef THREADS
/* Set current context for the calling thread */
/* TODO */
#else
/* Set current context for the address space, all threads */
Current = ctx;
#endif
compute_row_addresses( ctx );
/* init viewport */
if (ctx->gl_ctx->Viewport.Width==0) {
/* initialize viewport and scissor box to buffer size */
gl_Viewport( ctx->gl_ctx, 0, 0, width, height );
ctx->gl_ctx->Scissor.Width = width;
ctx->gl_ctx->Scissor.Height = height;
}
return GL_TRUE;
}
GLboolean FBMesaMakeCurrent( __DRIcontextPrivate *driContextPriv,
__DRIdrawablePrivate *driDrawPriv,
__DRIdrawablePrivate *driReadPriv )
{
//printf("FBMesaMakeCurrent 1\n");
if ( driContextPriv ) {
//printf("FBMesaMakeCurrent 2\n");
radeonContextPtr rmesa = (radeonContextPtr)driContextPriv->driverPrivate;
radeonCtx = radeonMakeCurrent( radeonCtx, rmesa, driDrawPriv );
gl_make_current2( radeonCtx->glCtx,
driDrawPriv->mesaBuffer,
driReadPriv->mesaBuffer );
if ( radeonCtx->driDrawable != driDrawPriv ) {
radeonCtx->driDrawable = driDrawPriv;
radeonCtx->dirty = RADEON_UPLOAD_ALL;
}
/* GH: We need this to correctly calculate the window offset
* and aux scissor rects.
*/
radeonCtx->new_state = RADEON_NEW_WINDOW | RADEON_NEW_CLIP;
if ( !radeonCtx->glCtx->Viewport.Width ) {
gl_Viewport( radeonCtx->glCtx, 0, 0, driDrawPriv->w, driDrawPriv->h );
}
} else {
//printf("FBMesaMakeCurrent 3\n");
gl_make_current( 0, 0 );
radeonCtx = NULL;
}
return GL_TRUE;
}