TextureLoader.cpp

#include "TextureLoader.h"
#include "FreeImage.h"
#include <vector>


#pragma comment (lib,"d3d11.lib")
#pragma comment (lib,"3Party\\FreeImage.lib")

#include <D3DX11.h>
#pragma comment (lib,"d3dx11.lib")

TextureLoader::Data TextureLoader::createTexture( const char* file)
{
	FREE_IMAGE_FORMAT fif = FIF_UNKNOWN;
	FIBITMAP *dib(0);
	BYTE* bits(0);
	unsigned int width(0), height(0);

	fif = FreeImage_GetFileType(file, 0);
	//if still unknown, try to guess the file format from the file extension
	if (fif == FIF_UNKNOWN)
		fif = FreeImage_GetFIFFromFilename(file);
	//if still unkown, return failure
	if (fif == FIF_UNKNOWN)
		assert(0 && "unknown texture format");

	//check that the plugin has reading capabilities and load the file
	if (FreeImage_FIFSupportsReading(fif))
		dib = FreeImage_Load(fif, file);
	//if the image failed to load, return failure
	if (dib == NULL)
		return Data();

	//retrieve the image data
	bits = FreeImage_GetBits(dib);
	//get the image width and height
	width = FreeImage_GetWidth(dib);
	height = FreeImage_GetHeight(dib);
	//if this somehow one of these failed (they shouldn't), return failure
	if ((bits == 0) || (width == 0) || (height == 0))
		assert(0);

	FREE_IMAGE_TYPE imageType = FreeImage_GetImageType(dib);

	switch (imageType)
	{
		case FIT_BITMAP:
		{
			FIBITMAP *newdib = FreeImage_ConvertTo32Bits(dib);
			FreeImage_Unload(dib);
			dib = newdib;
			bits = FreeImage_GetBits(dib);

		}
			break;
		default:
			//unsupported
			assert(0 && "unsupport format");
	}

	//ID3D11Texture2D* texture;
	//{
	//	D3D11_TEXTURE2D_DESC desc;
	//	desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
	//	desc.Width = width;
	//	desc.Height = height;
	//	desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
	//	desc.MipLevels = 1;
	//	desc.ArraySize = 1;
	//	desc.CPUAccessFlags = 0;
	//	desc.SampleDesc.Count = 1;
	//	desc.SampleDesc.Quality = 0;
	//	desc.MiscFlags = 0;
	//	desc.Usage = D3D11_USAGE_DEFAULT;

	//	D3D11_SUBRESOURCE_DATA initdata;
	//	initdata.pSysMem = bits;
	//	initdata.SysMemPitch = 4 * width;
	//	initdata.SysMemSlicePitch = 4 * width * height;

	//	if (FAILED(device->CreateTexture2D(&desc, &initdata, &texture)))
	//		return nullptr;
	//}
	//ID3D11ShaderResourceView* resource = nullptr;
	//{
	//	D3D11_SHADER_RESOURCE_VIEW_DESC desc;
	//	desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
	//	desc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
	//	desc.Texture2D.MostDetailedMip = 0;
	//	desc.Texture2D.MipLevels = -1;
	//	if (FAILED(device->CreateShaderResourceView(texture, &desc, &resource)))
	//	{
	//		texture->Release();
	//		return nullptr;
	//	}
	//	texture->Release();
	//}

	std::vector<char*> data(width * height * 4);
	memcpy(data.data(), bits, data.size());

	//Free FreeImage's copy of the data
	FreeImage_Unload(dib);
	return Data(data.data(), width, height);
}