godot/tools/editor/plugins/editor_preview_plugins.cpp

#include "editor_preview_plugins.h"
#include "io/resource_loader.h"
#include "tools/editor/editor_settings.h"
#include "io/file_access_memory.h"
#include "os/os.h"
#include "scene/resources/material.h"
#include "scene/resources/sample.h"
#include "scene/resources/mesh.h"
#include "scene/resources/bit_mask.h"
#include "tools/editor/editor_scale.h"
bool EditorTexturePreviewPlugin::handles(const String& p_type) const {

	return (ObjectTypeDB::is_type(p_type,"ImageTexture") || ObjectTypeDB::is_type(p_type, "AtlasTexture"));
}

Ref<Texture> EditorTexturePreviewPlugin::generate(const RES& p_from) {

	Image img;
	Ref<AtlasTexture> atex = p_from;
	if (atex.is_valid()) {
		Ref<ImageTexture> tex = atex->get_atlas();
		if (!tex.is_valid()) {
			return Ref<Texture>();
		}
		Image atlas = tex->get_data();
		img = atlas.get_rect(atex->get_region());
	}
	else {
		Ref<ImageTexture> tex = p_from;
		img = tex->get_data();
	}

	if (img.empty())
		return Ref<Texture>();

	img.clear_mipmaps();

	int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
	thumbnail_size*=EDSCALE;
	if (img.is_compressed()) {
		if (img.decompress()!=OK)
			return Ref<Texture>();
    } else if (img.get_format()!=Image::FORMAT_RGB && img.get_format()!=Image::FORMAT_RGBA) {
		img.convert(Image::FORMAT_RGBA);
	}

	int width,height;
	if (img.get_width() > thumbnail_size && img.get_width() >= img.get_height()) {

		width=thumbnail_size;
		height = img.get_height() * thumbnail_size / img.get_width();
	} else if (img.get_height() > thumbnail_size &&  img.get_height() >= img.get_width()) {

		height=thumbnail_size;
		width = img.get_width() * thumbnail_size / img.get_height();
	}  else {

		width=img.get_width();
		height=img.get_height();
	}

	img.resize(width,height);

	Ref<ImageTexture> ptex = Ref<ImageTexture>( memnew( ImageTexture ));

	ptex->create_from_image(img,0);
	return ptex;

}

EditorTexturePreviewPlugin::EditorTexturePreviewPlugin() {


}

////////////////////////////////////////////////////////////////////////////

bool EditorBitmapPreviewPlugin::handles(const String& p_type) const {

	return ObjectTypeDB::is_type(p_type,"BitMap");
}

Ref<Texture> EditorBitmapPreviewPlugin::generate(const RES& p_from) {

	Ref<BitMap> bm =p_from;

	if (bm->get_size()==Size2()) {
		return Ref<Texture>();
	}

	DVector<uint8_t> data;

	data.resize(bm->get_size().width*bm->get_size().height);

	{
		DVector<uint8_t>::Write w=data.write();

		for(int i=0;i<bm->get_size().width;i++) {
			for(int j=0;j<bm->get_size().height;j++) {
				if (bm->get_bit(Point2i(i,j))) {
					w[j*bm->get_size().width+i]=255;
				} else {
					w[j*bm->get_size().width+i]=0;

				}
			}

		}
	}


	Image img(bm->get_size().width,bm->get_size().height,0,Image::FORMAT_GRAYSCALE,data);

	int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
	thumbnail_size*=EDSCALE;
	if (img.is_compressed()) {
		if (img.decompress()!=OK)
			return Ref<Texture>();
	} else if (img.get_format()!=Image::FORMAT_RGB && img.get_format()!=Image::FORMAT_RGBA) {
		img.convert(Image::FORMAT_RGBA);
	}

	int width,height;
	if (img.get_width() > thumbnail_size && img.get_width() >= img.get_height()) {

		width=thumbnail_size;
		height = img.get_height() * thumbnail_size / img.get_width();
	} else if (img.get_height() > thumbnail_size &&  img.get_height() >= img.get_width()) {

		height=thumbnail_size;
		width = img.get_width() * thumbnail_size / img.get_height();
	}  else {

		width=img.get_width();
		height=img.get_height();
	}

	img.resize(width,height);

	Ref<ImageTexture> ptex = Ref<ImageTexture>( memnew( ImageTexture ));

	ptex->create_from_image(img,0);
	return ptex;

}

EditorBitmapPreviewPlugin::EditorBitmapPreviewPlugin() {


}

///////////////////////////////////////////////////////////////////////////


Ref<Texture> EditorPackedScenePreviewPlugin::_gen_from_imd(Ref<ResourceImportMetadata> p_imd) {

	if (p_imd.is_null()) {
		return Ref<Texture>();
	}

	if (!p_imd->has_option("thumbnail"))
		return Ref<Texture>();

	Variant tn = p_imd->get_option("thumbnail");
	//print_line(Variant::get_type_name(tn.get_type()));
	DVector<uint8_t> thumbnail = tn;

	int len = thumbnail.size();
	if (len==0)
		return Ref<Texture>();


	DVector<uint8_t>::Read r = thumbnail.read();

	Image img(r.ptr(),len);
	if (img.empty())
		return Ref<Texture>();

	Ref<ImageTexture> ptex = Ref<ImageTexture>( memnew( ImageTexture ));
	ptex->create_from_image(img,0);
	return ptex;

}

bool EditorPackedScenePreviewPlugin::handles(const String& p_type) const {

	return ObjectTypeDB::is_type(p_type,"PackedScene");
}
Ref<Texture> EditorPackedScenePreviewPlugin::generate(const RES& p_from) {

	Ref<ResourceImportMetadata> imd = p_from->get_import_metadata();
	return _gen_from_imd(imd);
}

Ref<Texture> EditorPackedScenePreviewPlugin::generate_from_path(const String& p_path) {

	Ref<ResourceImportMetadata> imd = ResourceLoader::load_import_metadata(p_path);
	return _gen_from_imd(imd);
}

EditorPackedScenePreviewPlugin::EditorPackedScenePreviewPlugin() {

}

//////////////////////////////////////////////////////////////////

bool EditorMaterialPreviewPlugin::handles(const String& p_type) const {

	return ObjectTypeDB::is_type(p_type,"Material"); //any material
}

Ref<Texture> EditorMaterialPreviewPlugin::generate(const RES& p_from) {

	Ref<Material> material = p_from;
	ERR_FAIL_COND_V(material.is_null(),Ref<Texture>());

	VS::get_singleton()->mesh_surface_set_material(sphere,0,material->get_rid());

	VS::get_singleton()->viewport_queue_screen_capture(viewport);
	VS::get_singleton()->viewport_set_render_target_update_mode(viewport,VS::RENDER_TARGET_UPDATE_ONCE); //once used for capture
//	print_line("queue capture!");
	Image img;

	int timeout=1000;
	while(timeout) {
		//print_line("try capture?");
		OS::get_singleton()->delay_usec(10);
		img = VS::get_singleton()->viewport_get_screen_capture(viewport);
		if (!img.empty())
			break;
		timeout--;
	}

	//print_line("captured!");
	VS::get_singleton()->mesh_surface_set_material(sphere,0,RID());

	int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
	thumbnail_size*=EDSCALE;
	img.resize(thumbnail_size,thumbnail_size);

	Ref<ImageTexture> ptex = Ref<ImageTexture>( memnew( ImageTexture ));
	ptex->create_from_image(img,0);
	return ptex;
}

EditorMaterialPreviewPlugin::EditorMaterialPreviewPlugin() {

	scenario = VS::get_singleton()->scenario_create();

	viewport = VS::get_singleton()->viewport_create();
	VS::get_singleton()->viewport_set_as_render_target(viewport,true);
	VS::get_singleton()->viewport_set_render_target_update_mode(viewport,VS::RENDER_TARGET_UPDATE_DISABLED);
	VS::get_singleton()->viewport_set_scenario(viewport,scenario);
	VS::ViewportRect vr;
	vr.x=0;
	vr.y=0;
	vr.width=128;
	vr.height=128;
	VS::get_singleton()->viewport_set_rect(viewport,vr);

	camera = VS::get_singleton()->camera_create();
	VS::get_singleton()->viewport_attach_camera(viewport,camera);
	VS::get_singleton()->camera_set_transform(camera,Transform(Matrix3(),Vector3(0,0,3)));
	VS::get_singleton()->camera_set_perspective(camera,45,0.1,10);

	light = VS::get_singleton()->light_create(VS::LIGHT_DIRECTIONAL);
	light_instance = VS::get_singleton()->instance_create2(light,scenario);
	VS::get_singleton()->instance_set_transform(light_instance,Transform().looking_at(Vector3(-1,-1,-1),Vector3(0,1,0)));

	light2 = VS::get_singleton()->light_create(VS::LIGHT_DIRECTIONAL);
	VS::get_singleton()->light_set_color(light2,VS::LIGHT_COLOR_DIFFUSE,Color(0.7,0.7,0.7));
	VS::get_singleton()->light_set_color(light2,VS::LIGHT_COLOR_SPECULAR,Color(0.0,0.0,0.0));
	light_instance2 = VS::get_singleton()->instance_create2(light2,scenario);

	VS::get_singleton()->instance_set_transform(light_instance2,Transform().looking_at(Vector3(0,1,0),Vector3(0,0,1)));

	sphere = VS::get_singleton()->mesh_create();
	sphere_instance = VS::get_singleton()->instance_create2(sphere,scenario);

	int lats=32;
	int lons=32;
	float radius=1.0;

	DVector<Vector3> vertices;
	DVector<Vector3> normals;
	DVector<Vector2> uvs;
	DVector<float> tangents;
	Matrix3 tt = Matrix3(Vector3(0,1,0),Math_PI*0.5);

	for(int i = 1; i <= lats; i++) {
		double lat0 = Math_PI * (-0.5 + (double) (i - 1) / lats);
		double z0  = Math::sin(lat0);
		double zr0 =  Math::cos(lat0);

		double lat1 = Math_PI * (-0.5 + (double) i / lats);
		double z1 = Math::sin(lat1);
		double zr1 = Math::cos(lat1);

		for(int j = lons; j >= 1; j--) {

			double lng0 = 2 * Math_PI * (double) (j - 1) / lons;
			double x0 = Math::cos(lng0);
			double y0 = Math::sin(lng0);

			double lng1 = 2 * Math_PI * (double) (j) / lons;
			double x1 = Math::cos(lng1);
			double y1 = Math::sin(lng1);


			Vector3 v[4]={
				Vector3(x1 * zr0, z0, y1 *zr0),
				Vector3(x1 * zr1, z1, y1 *zr1),
				Vector3(x0 * zr1, z1, y0 *zr1),
				Vector3(x0 * zr0, z0, y0 *zr0)
			};

#define ADD_POINT(m_idx) \
	normals.push_back(v[m_idx]);\
	vertices.push_back(v[m_idx]*radius);\
	{ Vector2 uv(Math::atan2(v[m_idx].x,v[m_idx].z),Math::atan2(-v[m_idx].y,v[m_idx].z));\
	  uv/=Math_PI;\
	  uv*=4.0;\
	  uv=uv*0.5+Vector2(0.5,0.5);\
	  uvs.push_back(uv);\
	 }\
	 { Vector3 t = tt.xform(v[m_idx]);\
	   tangents.push_back(t.x);\
	   tangents.push_back(t.y);\
	   tangents.push_back(t.z);\
	   tangents.push_back(1.0);\
	  }



			ADD_POINT(0);
			ADD_POINT(1);
			ADD_POINT(2);

			ADD_POINT(2);
			ADD_POINT(3);
			ADD_POINT(0);
		}
	}

	Array arr;
	arr.resize(VS::ARRAY_MAX);
	arr[VS::ARRAY_VERTEX]=vertices;
	arr[VS::ARRAY_NORMAL]=normals;
	arr[VS::ARRAY_TANGENT]=tangents;
	arr[VS::ARRAY_TEX_UV]=uvs;
	VS::get_singleton()->mesh_add_surface(sphere,VS::PRIMITIVE_TRIANGLES,arr);

}

EditorMaterialPreviewPlugin::~EditorMaterialPreviewPlugin() {

	VS::get_singleton()->free(sphere);
	VS::get_singleton()->free(sphere_instance);
	VS::get_singleton()->free(viewport);
	VS::get_singleton()->free(light);
	VS::get_singleton()->free(light_instance);
	VS::get_singleton()->free(light2);
	VS::get_singleton()->free(light_instance2);
	VS::get_singleton()->free(camera);
	VS::get_singleton()->free(scenario);

}

///////////////////////////////////////////////////////////////////////////

static bool _is_text_char(CharType c) {

	return (c>='a' && c<='z') || (c>='A' && c<='Z') || (c>='0' && c<='9') || c=='_';
}

bool EditorScriptPreviewPlugin::handles(const String& p_type) const {

	return ObjectTypeDB::is_type(p_type,"Script");
}

Ref<Texture> EditorScriptPreviewPlugin::generate(const RES& p_from) {


	Ref<Script> scr = p_from;
	if (scr.is_null())
		return Ref<Texture>();

	String code = scr->get_source_code().strip_edges();
	if (code=="")
		return Ref<Texture>();

	List<String> kwors;
	scr->get_language()->get_reserved_words(&kwors);

	Set<String> keywords;

	for(List<String>::Element *E=kwors.front();E;E=E->next()) {

		keywords.insert(E->get());

	}


	int line = 0;
	int col=0;
	int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
	thumbnail_size*=EDSCALE;
	Image img(thumbnail_size,thumbnail_size,0,Image::FORMAT_RGBA);



	Color bg_color = EditorSettings::get_singleton()->get("text_editor/background_color");
	bg_color.a=1.0;
	Color keyword_color = EditorSettings::get_singleton()->get("text_editor/keyword_color");
	Color text_color = EditorSettings::get_singleton()->get("text_editor/text_color");
	Color symbol_color = EditorSettings::get_singleton()->get("text_editor/symbol_color");
	Color comment_color = EditorSettings::get_singleton()->get("text_editor/comment_color");


	for(int i=0;i<thumbnail_size;i++) {
		for(int j=0;j<thumbnail_size;j++) {
			img.put_pixel(i,j,bg_color);
		}

	}

	bool prev_is_text=false;
	bool in_keyword=false;
	for(int i=0;i<code.length();i++) {

		CharType c = code[i];
		if (c>32) {
			if (col<thumbnail_size) {
				Color color = text_color;

				if (c!='_' && ((c>='!' && c<='/') || (c>=':' && c<='@') || (c>='[' && c<='`') || (c>='{' && c<='~') || c=='\t')) {
					//make symbol a little visible
					color=symbol_color;
					in_keyword=false;
				} else if (!prev_is_text && _is_text_char(c)) {
					int pos = i;

					while(_is_text_char(code[pos])) {
						pos++;
					}
					///print_line("from "+itos(i)+" to "+itos(pos));
					String word = code.substr(i,pos-i);
					//print_line("found word: "+word);
					if (keywords.has(word))
						in_keyword=true;

				} else if (!_is_text_char(c)) {
					in_keyword=false;
				}

				if (in_keyword)
					color=keyword_color;

				Color ul=color;
				ul.a*=0.5;
				img.put_pixel(col,line*2,bg_color.blend(ul));
				img.put_pixel(col,line*2+1,color);

				prev_is_text=_is_text_char(c);
			}
		} else {

			prev_is_text=false;
			in_keyword=false;

			if (c=='\n') {
				col=0;
				line++;
				if (line>=thumbnail_size/2)
					break;
			} else if (c=='\t') {
				col+=3;
			}
		}
		col++;
	}

	Ref<ImageTexture> ptex = Ref<ImageTexture>( memnew( ImageTexture));

	ptex->create_from_image(img,0);
	return ptex;

}

EditorScriptPreviewPlugin::EditorScriptPreviewPlugin() {


}
///////////////////////////////////////////////////////////////////

bool EditorSamplePreviewPlugin::handles(const String& p_type) const {

	return ObjectTypeDB::is_type(p_type,"Sample");
}

Ref<Texture> EditorSamplePreviewPlugin::generate(const RES& p_from) {

	Ref<Sample> smp =p_from;
	ERR_FAIL_COND_V(smp.is_null(),Ref<Texture>());


	int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
	thumbnail_size*=EDSCALE;
	DVector<uint8_t> img;
	int w = thumbnail_size;
	int h = thumbnail_size;
	img.resize(w*h*3);

	DVector<uint8_t>::Write imgdata = img.write();
	uint8_t * imgw = imgdata.ptr();
	DVector<uint8_t> data = smp->get_data();
	DVector<uint8_t>::Read sampledata = data.read();
	const uint8_t *sdata=sampledata.ptr();

	bool stereo = smp->is_stereo();
	bool _16=smp->get_format()==Sample::FORMAT_PCM16;
	int len = smp->get_length();

	if (len<1)
		return Ref<Texture>();

	if (smp->get_format()==Sample::FORMAT_IMA_ADPCM) {

		struct IMA_ADPCM_State {

			int16_t step_index;
			int32_t predictor;
			/* values at loop point */
			int16_t loop_step_index;
			int32_t loop_predictor;
			int32_t last_nibble;
			int32_t loop_pos;
			int32_t window_ofs;
			const uint8_t *ptr;
		} ima_adpcm;

		ima_adpcm.step_index=0;
		ima_adpcm.predictor=0;
		ima_adpcm.loop_step_index=0;
		ima_adpcm.loop_predictor=0;
		ima_adpcm.last_nibble=-1;
		ima_adpcm.loop_pos=0x7FFFFFFF;
		ima_adpcm.window_ofs=0;
		ima_adpcm.ptr=NULL;


		for(int i=0;i<w;i++) {

			float max[2]={-1e10,-1e10};
			float min[2]={1e10,1e10};
			int from = i*len/w;
			int to = (i+1)*len/w;
			if (to>=len)
				to=len-1;

			for(int j=from;j<to;j++) {

				while(j>ima_adpcm.last_nibble) {

					static const int16_t _ima_adpcm_step_table[89] = {
						7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
						19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
						50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
						130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
						337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
						876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
						2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
						5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
						15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
					};

					static const int8_t _ima_adpcm_index_table[16] = {
						-1, -1, -1, -1, 2, 4, 6, 8,
						-1, -1, -1, -1, 2, 4, 6, 8
					};

					int16_t nibble,signed_nibble,diff,step;

					ima_adpcm.last_nibble++;
					const uint8_t *src_ptr=sdata;

					int ofs = ima_adpcm.last_nibble>>1;

					if (stereo)
						ofs*=2;


					nibble = (ima_adpcm.last_nibble&1)?
							(src_ptr[ofs]>>4):(src_ptr[ofs]&0xF);
					step=_ima_adpcm_step_table[ima_adpcm.step_index];

					ima_adpcm.step_index += _ima_adpcm_index_table[nibble];
					if (ima_adpcm.step_index<0)
						ima_adpcm.step_index=0;
					if (ima_adpcm.step_index>88)
						ima_adpcm.step_index=88;

					/*
					signed_nibble = (nibble&7) * ((nibble&8)?-1:1);
					diff = (2 * signed_nibble + 1) * step / 4; */

					diff = step >> 3 ;
					if (nibble & 1)
						diff += step >> 2 ;
					if (nibble & 2)
						diff += step >> 1 ;
					if (nibble & 4)
						diff += step ;
					if (nibble & 8)
						diff = -diff ;

					ima_adpcm.predictor+=diff;
					if (ima_adpcm.predictor<-0x8000)
						ima_adpcm.predictor=-0x8000;
					else if (ima_adpcm.predictor>0x7FFF)
						ima_adpcm.predictor=0x7FFF;


					/* store loop if there */
					if (ima_adpcm.last_nibble==ima_adpcm.loop_pos) {

						ima_adpcm.loop_step_index = ima_adpcm.step_index;
						ima_adpcm.loop_predictor = ima_adpcm.predictor;
					}

				}

				float v=ima_adpcm.predictor/32767.0;
				if (v>max[0])
					max[0]=v;
				if (v<min[0])
					min[0]=v;
			}
			max[0]*=0.8;
			min[0]*=0.8;

			for(int j=0;j<h;j++) {
				float v = (j/(float)h) * 2.0 - 1.0;
				uint8_t* imgofs = &imgw[(j*w+i)*3];
				if (v>min[0] && v<max[0]) {
					imgofs[0]=255;
					imgofs[1]=150;
					imgofs[2]=80;
				} else {
					imgofs[0]=0;
					imgofs[1]=0;
					imgofs[2]=0;
				}
			}
		}
	} else {
		for(int i=0;i<w;i++) {
			// i trust gcc will optimize this loop
			float max[2]={-1e10,-1e10};
			float min[2]={1e10,1e10};
			int c=stereo?2:1;
			int from = i*len/w;
			int to = (i+1)*len/w;
			if (to>=len)
				to=len-1;

			if (_16) {
				const int16_t*src =(const int16_t*)sdata;

				for(int j=0;j<c;j++) {

					for(int k=from;k<=to;k++) {

						float v = src[k*c+j]/32768.0;
						if (v>max[j])
							max[j]=v;
						if (v<min[j])
							min[j]=v;
					}

				}
			} else {

				const int8_t*src =(const int8_t*)sdata;

				for(int j=0;j<c;j++) {

					for(int k=from;k<=to;k++) {

						float v = src[k*c+j]/128.0;
						if (v>max[j])
							max[j]=v;
						if (v<min[j])
							min[j]=v;
					}

				}
			}

			max[0]*=0.8;
			max[1]*=0.8;
			min[0]*=0.8;
			min[1]*=0.8;

			if (!stereo) {
				for(int j=0;j<h;j++) {
					float v = (j/(float)h) * 2.0 - 1.0;
					uint8_t* imgofs = &imgw[(j*w+i)*3];
					if (v>min[0] && v<max[0]) {
						imgofs[0]=255;
						imgofs[1]=150;
						imgofs[2]=80;
					} else {
						imgofs[0]=0;
						imgofs[1]=0;
						imgofs[2]=0;
					}
				}
			} else {

				for(int j=0;j<h;j++) {

					int half,ofs;
					float v;
					if (j<(h/2)) {
						half=0;
						ofs=0;
						v = (j/(float)(h/2)) * 2.0 - 1.0;
					} else {
						half=1;
						ofs=h/2;
						if( (float)(h/2) != 0 ) {
							v = ((j-(h/2))/(float)(h/2)) * 2.0 - 1.0;
						} else {
							v = ((j-(h/2))/(float)(1/2)) * 2.0 - 1.0;
						}
					}

					uint8_t* imgofs = &imgw[(j*w+i)*3];
					if (v>min[half] && v<max[half]) {
						imgofs[0]=255;
						imgofs[1]=150;
						imgofs[2]=80;
					} else {
						imgofs[0]=0;
						imgofs[1]=0;
						imgofs[2]=0;
					}
				}

			}

		}
	}

	imgdata = DVector<uint8_t>::Write();

	Ref<ImageTexture> ptex = Ref<ImageTexture>( memnew( ImageTexture));
	ptex->create_from_image(Image(w,h,0,Image::FORMAT_RGB,img),0);
	return ptex;

}

EditorSamplePreviewPlugin::EditorSamplePreviewPlugin() {


}

///////////////////////////////////////////////////////////////////////////

bool EditorMeshPreviewPlugin::handles(const String& p_type) const {

	return ObjectTypeDB::is_type(p_type,"Mesh"); //any Mesh
}

Ref<Texture> EditorMeshPreviewPlugin::generate(const RES& p_from) {

	Ref<Mesh> mesh = p_from;
	ERR_FAIL_COND_V(mesh.is_null(),Ref<Texture>());

	VS::get_singleton()->instance_set_base(mesh_instance,mesh->get_rid());

	AABB aabb= mesh->get_aabb();
	Vector3 ofs = aabb.pos + aabb.size*0.5;
	aabb.pos-=ofs;
	Transform xform;
	xform.basis=Matrix3().rotated(Vector3(0,1,0),Math_PI*0.125);
	xform.basis = Matrix3().rotated(Vector3(1,0,0),-Math_PI*0.125)*xform.basis;
	AABB rot_aabb = xform.xform(aabb);
	float m = MAX(rot_aabb.size.x,rot_aabb.size.y)*0.5;
	if (m==0)
		return Ref<Texture>();
	m=1.0/m;
	m*=0.5;
	//print_line("scale: "+rtos(m));
	xform.basis.scale(Vector3(m,m,m));
	xform.origin=-xform.basis.xform(ofs); //-ofs*m;
	xform.origin.z-=rot_aabb.size.z*2;
	VS::get_singleton()->instance_set_transform(mesh_instance,xform);



	VS::get_singleton()->viewport_queue_screen_capture(viewport);
	VS::get_singleton()->viewport_set_render_target_update_mode(viewport,VS::RENDER_TARGET_UPDATE_ONCE); //once used for capture
//	print_line("queue capture!");
	Image img;

	int timeout=1000;
	while(timeout) {
		//print_line("try capture?");
		OS::get_singleton()->delay_usec(10);
		img = VS::get_singleton()->viewport_get_screen_capture(viewport);
		if (!img.empty())
			break;
		timeout--;
	}

	//print_line("captured!");
	VS::get_singleton()->instance_set_base(mesh_instance,RID());

	int thumbnail_size = EditorSettings::get_singleton()->get("file_dialog/thumbnail_size");
	thumbnail_size*=EDSCALE;
	img.resize(thumbnail_size,thumbnail_size);

	Ref<ImageTexture> ptex = Ref<ImageTexture>( memnew( ImageTexture ));
	ptex->create_from_image(img,0);
	return ptex;
}

EditorMeshPreviewPlugin::EditorMeshPreviewPlugin() {

	scenario = VS::get_singleton()->scenario_create();
	viewport = VS::get_singleton()->viewport_create();
	VS::get_singleton()->viewport_set_as_render_target(viewport,true);
	VS::get_singleton()->viewport_set_render_target_update_mode(viewport,VS::RENDER_TARGET_UPDATE_DISABLED);
	VS::get_singleton()->viewport_set_scenario(viewport,scenario);
	VS::ViewportRect vr;
	vr.x=0;
	vr.y=0;
	vr.width=128;
	vr.height=128;
	VS::get_singleton()->viewport_set_rect(viewport,vr);

	camera = VS::get_singleton()->camera_create();
	VS::get_singleton()->viewport_attach_camera(viewport,camera);
	VS::get_singleton()->camera_set_transform(camera,Transform(Matrix3(),Vector3(0,0,3)));
//	VS::get_singleton()->camera_set_perspective(camera,45,0.1,10);
	VS::get_singleton()->camera_set_orthogonal(camera,1.0,0.01,1000.0);

	light = VS::get_singleton()->light_create(VS::LIGHT_DIRECTIONAL);
	light_instance = VS::get_singleton()->instance_create2(light,scenario);
	VS::get_singleton()->instance_set_transform(light_instance,Transform().looking_at(Vector3(-1,-1,-1),Vector3(0,1,0)));

	light2 = VS::get_singleton()->light_create(VS::LIGHT_DIRECTIONAL);
	VS::get_singleton()->light_set_color(light2,VS::LIGHT_COLOR_DIFFUSE,Color(0.7,0.7,0.7));
	VS::get_singleton()->light_set_color(light2,VS::LIGHT_COLOR_SPECULAR,Color(0.0,0.0,0.0));
	light_instance2 = VS::get_singleton()->instance_create2(light2,scenario);

	VS::get_singleton()->instance_set_transform(light_instance2,Transform().looking_at(Vector3(0,1,0),Vector3(0,0,1)));

//	sphere = VS::get_singleton()->mesh_create();
	mesh_instance = VS::get_singleton()->instance_create();
	VS::get_singleton()->instance_set_scenario(mesh_instance,scenario);



}

EditorMeshPreviewPlugin::~EditorMeshPreviewPlugin() {

	//VS::get_singleton()->free(sphere);
	VS::get_singleton()->free(mesh_instance);
	VS::get_singleton()->free(viewport);
	VS::get_singleton()->free(light);
	VS::get_singleton()->free(light_instance);
	VS::get_singleton()->free(light2);
	VS::get_singleton()->free(light_instance2);
	VS::get_singleton()->free(camera);
	VS::get_singleton()->free(scenario);

}