From b208c0b805d204e0ec7ae008e1224361e89c5642 Mon Sep 17 00:00:00 2001
From: Nimetu <nimetu@gmail.com>
Date: Sun, 26 Jan 2020 17:22:45 +0200
Subject: [PATCH] Added: Creating texture from data:image/type

---
 code/nel/include/nel/gui/view_renderer.h |  2 +
 code/nel/src/gui/view_bitmap.cpp         |  2 +-
 code/nel/src/gui/view_renderer.cpp       | 98 ++++++++++++++++++++++++
 3 files changed, 101 insertions(+), 1 deletion(-)

diff --git a/code/nel/include/nel/gui/view_renderer.h b/code/nel/include/nel/gui/view_renderer.h
index 4194a59fa..aefbb315f 100644
--- a/code/nel/include/nel/gui/view_renderer.h
+++ b/code/nel/include/nel/gui/view_renderer.h
@@ -267,6 +267,8 @@ namespace NLGUI
 							  bool bReleasable=true
 							 );
 
+		// Create texture from dataURL "data:image/png;base64," string
+		sint32 createTextureFromDataURL(const std::string &data, bool uploadDXTC=true, bool bReleasable=true);
 
 		// change position of a sub-texture (inside its big texture) from the sub-texture filename
 		void updateTexturePos(const std::string &texturefileName,
diff --git a/code/nel/src/gui/view_bitmap.cpp b/code/nel/src/gui/view_bitmap.cpp
index 633a8856b..8922d5c4e 100644
--- a/code/nel/src/gui/view_bitmap.cpp
+++ b/code/nel/src/gui/view_bitmap.cpp
@@ -481,7 +481,7 @@ namespace NLGUI
 			}
 		}
 		else
-			_TextureId.setTexture (toLower(TxName).c_str (), _TxtOffsetX, _TxtOffsetY, _TxtWidth, _TxtHeight, false);
+			_TextureId.setTexture (TxName.c_str (), _TxtOffsetX, _TxtOffsetY, _TxtWidth, _TxtHeight, false);
 	}
 
 	// ----------------------------------------------------------------------------
diff --git a/code/nel/src/gui/view_renderer.cpp b/code/nel/src/gui/view_renderer.cpp
index 5dabede88..4c2db062a 100644
--- a/code/nel/src/gui/view_renderer.cpp
+++ b/code/nel/src/gui/view_renderer.cpp
@@ -24,6 +24,8 @@
 #include "nel/misc/file.h"
 #include "nel/misc/uv.h"
 #include "nel/misc/hierarchical_timer.h"
+#include "nel/misc/base64.h"
+#include "nel/misc/md5.h"
 
 using namespace NLMISC;
 using namespace std;
@@ -998,6 +1000,10 @@ namespace NLGUI
 										)
 	{
 		if (sGlobalTextureName.empty()) return -1;
+
+		if (startsWith(sGlobalTextureName, "data:image/"))
+			return createTextureFromDataURL(sGlobalTextureName, uploadDXTC, bReleasable);
+
 		// Look if already existing
 		string sLwrGTName = toLower(sGlobalTextureName);
 		TGlobalTextureList::iterator ite = _GlobalTextures.begin();
@@ -1062,6 +1068,93 @@ namespace NLGUI
 		return TextID;
 	}
 
+	sint32 CViewRenderer::createTextureFromDataURL(const std::string &data, bool uploadDXTC, bool bReleasable)
+	{
+		if (!startsWith(data, "data:image/"))
+			return -1;
+
+		size_t pos = data.find(";base64,");
+		if (pos == std::string::npos)
+		{
+			nlwarning("Failed to parse dataURL (not base64?) '%s'", data.c_str());
+			return -1;
+		}
+
+		std::string md5hash = getMD5((uint8 *)data.c_str(), (uint32)data.size()).toString();
+
+		TGlobalTextureList::iterator ite = _GlobalTextures.begin();
+		while (ite != _GlobalTextures.end())
+		{
+			if (md5hash == ite->Name)
+				break;
+			ite++;
+		}
+
+		// If global texture not exists create it
+		if (ite == _GlobalTextures.end())
+		{
+			std::string decoded = base64::decode(data.substr(pos + 8));
+			if (decoded.empty())
+			{
+				nlwarning("base64 decode failed '%s'", data.substr(pos + 8).c_str());
+				return -1;
+			}
+
+			//
+			CMemStream buf;
+			if (buf.isReading()) buf.invert();
+			buf.serialBuffer((uint8 *)(decoded.data()), decoded.size());
+			buf.invert();
+
+			CBitmap btm;
+			btm.load(buf);
+
+			SGlobalTexture gtTmp;
+			gtTmp.FromGlobaleTexture = false;
+
+			gtTmp.Width = gtTmp.DefaultWidth = btm.getWidth();;
+			gtTmp.Height = gtTmp.DefaultHeight = btm.getHeight();
+
+			if (gtTmp.Width == 0 || gtTmp.Height == 0)
+			{
+				nlwarning("Failed to load the texture '%s', please check image format", data.c_str());
+				return -1;
+			}
+
+			UTextureMem *texture = driver->createTextureMem(btm.getWidth(), btm.getHeight(), CBitmap::RGBA);
+			if (!texture)
+			{
+				nlwarning("Failed to create mem texture (%d,%d)", btm.getWidth(), btm.getHeight());
+				return -1;
+			}
+
+			memcpy(texture->getPointer(), btm.getPixels().getPtr(), btm.getSize() * 4);
+
+			gtTmp.Texture = texture;
+			gtTmp.Name = md5hash;
+			gtTmp.Texture->setFilterMode(UTexture::Nearest, UTexture::NearestMipMapOff);
+			gtTmp.Texture->setReleasable(bReleasable);
+			if(uploadDXTC)
+				gtTmp.Texture->setUploadFormat(UTexture::DXTC5);
+
+			_GlobalTextures.push_back(gtTmp);
+			ite = _GlobalTextures.end();
+			ite--;
+		}
+
+		// Add a texture with reference to the i th global texture
+		SImage iTmp;
+
+		// Set default parameters
+		iTmp.Name = data;
+		iTmp.GlobalTexturePtr = &(*ite);
+		iTmp.UVMin = CUV(0.f , 0.f);
+		iTmp.UVMax = CUV(1.f , 1.f);
+		sint32 TextID = addSImage(iTmp);
+
+		return TextID;
+	}
+
 	void CViewRenderer::updateTexturePos(const std::string &texturefileName, sint32 offsetX /*=0*/, sint32 offsetY /*=0*/, sint32 width /*=-1*/, sint32 height /*=-1*/)
 	{
 		sint32 id = getTextureIdFromName (texturefileName);
@@ -1159,6 +1252,11 @@ namespace NLGUI
 						{
 							driver->deleteTextureFile (tf);
 						}
+						else
+						{
+							UTextureMem *tf = dynamic_cast<NL3D::UTextureMem *>(iteGT->Texture);
+							if (tf) driver->deleteTextureMem(tf);
+						}
 						_GlobalTextures.erase (iteGT);
 						return;
 					}