Rename and move loaders, expose parsers

Former-commit-id: 932ae2aab020f956d3fdb91107f6842ff292aa08

src/Nazara/Utility/Formats/STBLoader.cpp

@@ -0,0 +1,94 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Utility module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Utility/Formats/STBLoader.hpp>
+#include <stb_image/stb_image.h>
+#include <Nazara/Core/Endianness.hpp>
+#include <Nazara/Core/Error.hpp>
+#include <Nazara/Core/File.hpp>
+#include <Nazara/Core/InputStream.hpp>
+#include <Nazara/Core/MemoryStream.hpp>
+#include <Nazara/Utility/Image.hpp>
+#include <set>
+#include <Nazara/Utility/Debug.hpp>
+
+namespace
+{
+	int Read(void* userdata, char* data, int size)
+	{
+		NzInputStream* stream = static_cast<NzInputStream*>(userdata);
+		return static_cast<int>(stream->Read(data, size));
+	}
+
+    void Skip(void* userdata, int size)
+    {
+		NzInputStream* stream = static_cast<NzInputStream*>(userdata);
+		stream->SetCursorPos(static_cast<nzInt64>(stream->GetCursorPos()) + static_cast<nzInt64>(size));
+    }
+
+	int Eof(void* userdata)
+	{
+		NzInputStream* stream = static_cast<NzInputStream*>(userdata);
+		return stream->GetCursorPos() >= stream->GetSize();
+	}
+
+	static stbi_io_callbacks callbacks = {Read, Skip, Eof};
+
+	bool IsSupported(const NzString& extension)
+	{
+		static std::set<NzString> supportedExtensions = {"bmp", "gif", "hdr", "jpg", "jpeg", "pic", "png", "ppm", "pgm", "psd", "tga"};
+		return supportedExtensions.find(extension) != supportedExtensions.end();
+	}
+
+	nzTernary Check(NzInputStream& stream, const NzImageParams& parameters)
+	{
+		NazaraUnused(parameters);
+
+		int width, height, bpp;
+		if (stbi_info_from_callbacks(&callbacks, &stream, &width, &height, &bpp))
+			return nzTernary_True;
+		else
+			return nzTernary_False;
+	}
+
+	bool Load(NzImage* image, NzInputStream& stream, const NzImageParams& parameters)
+	{
+		// Je charge tout en RGBA8 et je converti ensuite via la méthode Convert
+		// Ceci à cause d'un bug de STB lorsqu'il s'agit de charger certaines images (ex: JPG) en "default"
+
+		int width, height, bpp;
+		nzUInt8* ptr = stbi_load_from_callbacks(&callbacks, &stream, &width, &height, &bpp, STBI_rgb_alpha);
+		if (!ptr)
+		{
+			NazaraError("Failed to load image: " + NzString(stbi_failure_reason()));
+			return false;
+		}
+
+		if (!image->Create(nzImageType_2D, nzPixelFormat_RGBA8, width, height, 1, (parameters.levelCount > 0) ? parameters.levelCount : 1))
+		{
+			NazaraError("Failed to create image");
+			stbi_image_free(ptr);
+
+			return false;
+		}
+
+		image->Update(ptr);
+		stbi_image_free(ptr);
+
+		if (parameters.loadFormat != nzPixelFormat_Undefined)
+			image->Convert(parameters.loadFormat);
+
+		return true;
+	}
+}
+
+void NzLoaders_STB_Register()
+{
+	NzImageLoader::RegisterLoader(IsSupported, Check, Load);
+}
+
+void NzLoaders_STB_Unregister()
+{
+	NzImageLoader::UnregisterLoader(IsSupported, Check, Load);
+}