graphics: add a picture to store/show some errors,

Scene Editor: try to do not end with a fatal errors if a terrain's picture or
  map picture does not exist, to be improved...

rsrc/graphics/CREDITS.md

@@ -20,6 +20,7 @@ though in some cases rearranged a little:
 - dlogbtnsm.png
 - dlogbtntall.png
 - dlogpics.png
+- errors.png ( "Under Construction Grunge Sign" by Free Grunge Textures - www.freestock.ca is licensed under CC BY 2.0 )
 - edsplash.png (by James Ernest)
 - fighthelp.png
 - invenbtns.png (the coin was cropped from an item graphic)

src/gfx/gfxsheets.cpp

@@ -29,8 +29,8 @@ Texture_pos cCustomGraphics::find_graphic(pic_num_t which_rect, bool party) {
 	else if(numSheets == 0) valid = false;
 	if(!valid) {
 	INVALID:
-		auto const &blank = *ResMgr::textures.get("blank", true);
-		return std::make_pair(blank, rectangle(0,0,36,28));
+		auto const &error = *ResMgr::textures.get("errors", true);
+		return std::make_pair(error, rectangle(0,0,40,40));
 	}
 	short sheet = which_rect / 100;
 	if(is_old || party) sheet = 0;

src/gfx/texture.hpp

@@ -78,6 +78,7 @@ struct Texture {
 			 { "dlogscrollwh", {64,64} },
 			 { "edbuttons", {251,164} },
 			 { "edsplash", {640,480} },
+			 { "errors", {40,40} },
 			 { "fields", {224,144} },
 			 { "fighthelp", {320,125} },
 			 { "icon", {38,38} },

src/scenario/terrain.cpp

@@ -438,10 +438,10 @@ cPictNum cTerrain::get_map_picture_num() const
 {
 	if (map_pic<0)
 		return get_picture_num();
-	if (map_pic<1000)
-		return cPictNum(map_pic+(map_pic<960 ? 0 : 400-960),PIC_TER_MAP);
+	if (map_pic < 1000)
+		return cPictNum(map_pic,PIC_TER_MAP);
 	if(map_pic < 2000)
-		return cPictNum(map_pic-1000,PIC_CUSTOM_TER);
-	return cPictNum(map_pic-2000,PIC_CUSTOM_TER_ANIM);
+		return cPictNum(map_pic-1000,PIC_CUSTOM_TER_MAP);
+	return cPictNum(map_pic-2000,PIC_CUSTOM_TER_MAP);
 	// checkme add force PIC_TER_MAP?
 }

src/scenedit/scen.core.cpp

@@ -353,15 +353,38 @@ static void fill_ter_info(cDialog& me, short ter){
 	cTerrain& ter_type = scenario.ter_types[ter];
 	{
 		cPict& pic_ctrl = dynamic_cast<cPict&>(me["graphic"]);
-		pic_ctrl.setPict(ter_type.get_picture_num());
+		bool bad=false;
+		if (ter_type.get_picture_num().type==ePicType::PIC_TER) {
+			// REMOVEME when setPict will not do fatal error
+			try {
+				*ResMgr::textures.get("ter" + std::to_string(1 + ter_type.get_picture_num().num / 50));
+			}
+			catch(...) {
+				bad=true;
+			}
+		}
+		if (!bad)
+			pic_ctrl.setPict(ter_type.get_picture_num());
+		else
+			pic_ctrl.setPict(cPictNum(1999,ePicType::PIC_CUSTOM_TER));
 		me["pict"].setTextToNum(ter_type.picture);
 	}{
 		cPict& pic_ctrl = dynamic_cast<cPict&>(me["seemap"]);
-		pic_num_t pic = ter_type.map_pic;
-		if(pic < 1000)
-			pic_ctrl.setPict(pic, PIC_TER_MAP);
-		else pic_ctrl.setPict(pic, PIC_CUSTOM_TER_MAP);
-		me["map"].setTextToNum(pic);
+		bool bad=false;
+		if (ter_type.get_map_picture_num().type==ePicType::PIC_TER) {
+			// REMOVEME when setPict will not do fatal error
+			try {
+				*ResMgr::textures.get("ter" + std::to_string(1 + ter_type.get_map_picture_num().num / 50));
+			}
+			catch(...) {
+				bad=true;
+			}
+		}
+		if (!bad) // FIXME the picture size is bad if we revert to the main picture
+			pic_ctrl.setPict(ter_type.get_map_picture_num());
+		else
+			pic_ctrl.setPict(cPictNum(1999,ePicType::PIC_CUSTOM_TER));
+		me["map"].setTextToNum(ter_type.map_pic);
 	}
 	me["number"].setTextToNum(ter);
 	me["name"].setText(ter_type.name);

src/scenedit/scen.graphics.cpp

@@ -318,7 +318,7 @@ static std::vector<short> get_small_icons(location at, ter_num_t t_to_draw) {
 }
 
 static bool get_terrain_picture(cPictNum pict, Texture &source, rectangle &from_rect)
-{
+try {
 	source=Texture();
 	ePicType type=pict.type;
 	if (pict.num<0)
@@ -336,8 +336,14 @@ static bool get_terrain_picture(cPictNum pict, Texture &source, rectangle &from_
 			break;
 		case ePicType::PIC_TER_MAP:
 			source=*ResMgr::textures.get("termap");
-			from_rect.left = 12*(pict.num%20);
-			from_rect.top = 12*(pict.num/20);
+			if (pict.num<960) {
+				from_rect.left = 12*(pict.num%20);
+				from_rect.top = 12*(pict.num/20);
+			}
+			else {
+				from_rect.left = 12*20;
+				from_rect.top = 12*(pict.num-960);
+			}
 			from_rect.right = from_rect.left+12;
 			from_rect.bottom = from_rect.top+12;
 			break;
@@ -350,10 +356,17 @@ static bool get_terrain_picture(cPictNum pict, Texture &source, rectangle &from_
 		default:
 			break;
 	}
-	if (bool(source))
-		return true;
+	if (!source)
+		throw "can not find image";
+	return true;
+}
+catch (...) {
+	if (pict.num==-1) // ok no picture
+		return false;
 	std::cerr << "Error[get_terrain_picture]: can not find picture id=" << pict.num << "type=" << int(pict.type)<< "\n";
-	return false;
+	source = *ResMgr::textures.get("errors");
+	from_rect={0,0,40,40};
+	return true;
 }
 
 void Set_up_win() {