Hello Community,

I was reading through the rastertek tutorials and got quite confused how complicated stuff is explained.

Basicly I am trying to map a texture (image) into a rect.

If I want draw a simple colored rect, I use this code

void G::Base::DX11Renderer::DrawFilledBox(C2D _at, DIM _dim, Color _BoxColor)
{
	if (ptr_dx11Manager->ptr_Context == nullptr)
		return;

	int a = _BoxColor.A & 0xff;
	int r = _BoxColor.R & 0xff;
	int g = _BoxColor.G & 0xff;
	int b = _BoxColor.B & 0xff;
	D3DXCOLOR* col = new D3DXCOLOR(((float)r / 255.0f), ((float)g / 255.0f), ((float)b / 255.0f), ((float)a / 255.0f));

	UINT viewportNumber = 1;
	D3D11_VIEWPORT vp;

	float blendFactor[] = { 0.0f, 0.0f, 0.0f, 0.0f };
	ptr_dx11Manager->ptr_Context->OMSetBlendState(ptr_transparency, blendFactor, 0xffffffff);
	ptr_dx11Manager->ptr_Context->RSGetViewports(&viewportNumber, &vp);

	
	C2D loc_f = _at;
	C2D loc_t = C2D(_at.x + _dim.w, _at.y + _dim.h);
	DIM loc_view(vp.Width, vp.Height);
	NormC(&loc_f, loc_view);
	NormC(&loc_t, loc_view);
	

	COLOR_VERTEX* v = NULL;
	D3D11_MAPPED_SUBRESOURCE mapData;

	if (FAILED(ptr_dx11Manager->ptr_Context->Map(ptr_VertexBuffer, NULL, D3D11_MAP_WRITE_DISCARD, NULL, &mapData)))
		return;

	v = (COLOR_VERTEX*)mapData.pData;
	// position = [0] 
	//
	//  [0]------[1]
	//   |        |
	//   |        |
	//   |        |
	//  [2]------[3]

	v[0].Position.x = loc_f.x;
	v[0].Position.y = loc_f.y;
	v[0].Position.z = 1.0f;
	v[0].Color = *col;

	v[1].Position.x = loc_t.x;
	v[1].Position.y = loc_f.y;
	v[1].Position.z = 1.0f;
	v[1].Color = *col;

	v[2].Position.x = loc_f.x;
	v[2].Position.y = loc_t.y;
	v[2].Position.z = 1.0f;
	v[2].Color = *col;

	v[3].Position.x = loc_t.x;
	v[3].Position.y = loc_t.y;
	v[3].Position.z = 1.0f;
	v[3].Color = *col;
	
	ptr_dx11Manager->ptr_Context->Unmap(ptr_VertexBuffer, NULL);

	UINT Stride = sizeof(COLOR_VERTEX);
	UINT Offset = 0;

	ptr_dx11Manager->ptr_Context->IASetVertexBuffers(0, 1, &ptr_VertexBuffer, &Stride, &Offset);
	ptr_dx11Manager->ptr_Context->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
	ptr_dx11Manager->ptr_Context->IASetInputLayout(ptr_InputLayout);

	ptr_dx11Manager->ptr_Context->VSSetShader(ptr_VS, 0, 0);
	ptr_dx11Manager->ptr_Context->PSSetShader(ptr_PS, 0, 0);
	ptr_dx11Manager->ptr_Context->GSSetShader(NULL, 0, 0);
	ptr_dx11Manager->ptr_Context->Draw(4, 0);
		
	delete col;
}

and the costum COLOR_VERTEX is defined as:

struct COLOR_VERTEX
{
   D3DXVECTOR3	Position;
   D3DXCOLOR    Color;
};

So first of all is what I am doing here:

1) I load what is drawn on the screen into

D3D11_MAPPED_SUBRESOURCE mapData;

and cast its pData into my custom vertex.

2) I overwrite the vertexes needed for "D3D10_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP" to get a square and put the result

back into the ptr_VertexBuffer

Well then the rest is following ..

So my question is now how I would set a image into it instead of a color.

I do have the following two things:

1) ID3D11Resource* ptr_Resource;

Got throught:

D3DX11CreateTextureFromFile(_ptr_Device, _file.c_str(), NULL, NULL, &ptr_Resource, NULL);

This may help. https://github.com/Microsoft/DirectXTK/wiki/3D-shapes

This may help. https://github.com/Microsoft/DirectXTK/wiki/3D-shapes

not realy, cant use the toolkit because it causes problems if I use stuff from dx9 (summer sdk june 2010 or so) :/