// releases resources allocated on the opengl end, storing local copy if requested
void
opengl_texture::release() {
if( id == -1 ) { return; }
if( true == Global.ResourceMove ) {
// if resource move is enabled we don't keep a cpu side copy after upload
// so need to re-acquire the data before release
// TBD, TODO: instead of vram-ram transfer fetch the data 'normally' from the disk using worker thread
if( type == "make:" ) {
// auto generated textures only store a stub
make_stub();
}
else {
::glBindTexture( GL_TEXTURE_2D, id );
GLint datasize{};
GLint iscompressed{};
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED, &iscompressed );
if( iscompressed == GL_TRUE ) {
// texture is compressed on the gpu side
// query texture details needed to perform the backup...
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &data_format );
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &datasize );
data.resize( datasize );
// ...fetch the data...
::glGetCompressedTexImage( GL_TEXTURE_2D, 0, &data[ 0 ] );
}
else {
// for whatever reason texture didn't get compressed during upload
// fallback on plain rgba storage...
data_format = GL_RGBA;
data.resize( data_width * data_height * 4 );
// ...fetch the data...
::glGetTexImage( GL_TEXTURE_2D, 0, data_format, GL_UNSIGNED_BYTE, &data[ 0 ] );
}
// ...and update texture object state
data_mapcount = 1; // we keep copy of only top mipmap level
data_state = resource_state::good;
}
}
// release opengl resources
::glDeleteTextures( 1, &id );
id = -1;
is_ready = false;
return;
}
// loads texture data from specified file
// TODO: wrap it in a workitem class, for the job system deferred loading
void
opengl_texture::load() {
if( type == "make:" ) {
// for generated texture we delay data creation until texture is bound
// this ensures the script will receive all simulation data it might potentially want
// as any binding will happen after simulation is loaded, initialized and running
// until then we supply data for a tiny 2x2 grey stub
make_stub();
}
else {
WriteLog( "Loading texture data from \"" + name + type + "\"", logtype::texture );
data_state = resource_state::loading;
if( type == ".dds" ) { load_DDS(); }
else if( type == ".tga" ) { load_TGA(); }
else if( type == ".png" ) { load_PNG(); }
else if( type == ".bmp" ) { load_BMP(); }
else if( type == ".tex" ) { load_TEX(); }
else { goto fail; }
}
// data state will be set by called loader, so we're all done here
if( data_state == resource_state::good ) {
has_alpha = (
data_components == GL_RGBA ?
true :
false );
size = data.size() / 1024;
return;
}
fail:
data_state = resource_state::failed;
ErrorLog( "Bad texture: failed to load texture \"" + name + type + "\"" );
// NOTE: temporary workaround for texture assignment errors
id = 0;
return;
}
init_ws()
{
#ifndef GEM
extern alice_window main_win;
curr_window = &main_win;
#endif
curr_workspace = ws_list = Tptr(main_ws);
#ifndef GEM
main_win.wspace = curr_workspace;
#endif
linkup( curr_workspace, 0, make_stub( C_ROOT ) );
work_name(curr_workspace) = "main";
work_debug( curr_workspace ) = 0;
#ifdef GEM
do_gdupdate();
#endif
printt1( "Initialize workspaces - main_ws is %x\n", Tptr(main_ws) );
/* an init_pwork will be done later if we decide to clip */
}
nodep
comstub()
{
return make_stub( C_COMMENT );
}
