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Rendering textured quads with DX10/11

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I haven't used dx10/11 before, and I need to port a simple dx9 code that creates textures from memory and renders then on screen.
The device already exists, I need to change all the flags to do my 2d rendering and change them back afterwards. Here's roughly what my dx9 code does:
Main rendering function
void onRender(...)

  if (pOrigState == NULL && !SUCCEEDED(pDevice->CreateStateBlock(D3DSBT_ALL, &pOrigState)))


  D3DVIEWPORT9 oldViewport;
  IDirect3DBaseTexture9* oldTexture;

  pDevice->GetTexture(0, &oldTexture);

  if (pNewState == NULL)


    pDevice->SetRenderState(D3DRS_ZENABLE, FALSE);
    pDevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_SOLID);
    pDevice->SetRenderState(D3DRS_SHADEMODE, D3DSHADE_GOURAUD);
    pDevice->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);
    pDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
    pDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
    pDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
    pDevice->SetRenderState(D3DRS_STENCILENABLE, FALSE);
    pDevice->SetRenderState(D3DRS_WRAP0, 0);
    pDevice->SetRenderState(D3DRS_LIGHTING, FALSE);
    pDevice->SetRenderState(D3DRS_CLIPPLANEENABLE, 0);
    pDevice->SetRenderState(D3DRS_COLORWRITEENABLE, 0x0F);
    pDevice->SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD);

    pDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
    pDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
    pDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);
    pDevice->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
    pDevice->SetSamplerState(0, D3DSAMP_MIPFILTER, D3DTEXF_NONE);


  // rendering goes here

  pDevice->SetTexture(0, oldTexture);
Rendering uses three procedures - create/update a texture from memory, set viewport, and render a quad.

For loading textures, I create a D3DPOOL_SYSTEMMEM texture for all power-of-two square sizes and use them to update D3DPOOL_DEFAULT textures that are used for actual rendering.

Drawing a rectangle:
void drawRect(...)
  pDevice->SetTexture(0, pTexture);
  vertices[0].x = x0; vertices[0].y = y0; vertices[0].color = color;
  vertices[1].x = x1; vertices[1].y = y0; vertices[1].color = color;
  vertices[2].x = x1; vertices[2].y = y1; vertices[2].color = color;
  vertices[3].x = x0; vertices[3].y = y1; vertices[3].color = color;
  vertices[0].u = 0; vertices[0].v = 0;
  vertices[1].u = u; vertices[1].v = 0;
  vertices[2].u = u; vertices[2].v = v;
  vertices[3].u = 0; vertices[3].v = v;
  pDevice->DrawPrimitiveUP(D3DPT_TRIANGLEFAN, 2, vertices, sizeof(Vertex));
Now, I'm looking for the bare minimum DX10/11 code that would do the same thing. I put something together looking at tutorials, but its pretty ugly and I'm hoping there's something simpler.

Texture loading seems to work fine, and is probably even easier than DX9 since I only need to call Map or UpdateSubResource once.

However, setting up render states and rendering a quad requires too much work.. Here's roughly what I have now, in no particular order:
  struct Vertex
    float x, y, z, w;
    float u, v;
    unsigned long color;
// VS
  struct vst {
    float4 pos: POSITION;
    float2 tex: TEXCOORD0;
    float4 clr: COLOR;
  struct pst {
    float4 pos: SV_POSITION;
    float2 tex: TEXCOORD0;
    float4 clr: COLOR;
  pst VS(vst i) {
    pst o;
    o.pos = i.pos;
    o.tex = i.tex;
    o.clr = i.clr;
    return o;
// PS
  Texture2D tex;
  SamplerState ss;
  struct pst {
    float4 pos: POSITIONT;
    float2 tex: TEXCOORD0;
    float4 clr: COLOR;
  float4 PS(pst i): SV_TARGET {
    return tex.Sample(ss, i.tex) * i.clr;
// vertex declaration
  memset(desc, 0, sizeof desc);
  desc[0].SemanticName = "POSITION";
  desc[0].Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
  desc[0].AlignedByteOffset = 0;
  desc[0].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
  desc[1].SemanticName = "TEXCOORD";
  desc[1].Format = DXGI_FORMAT_R32G32_FLOAT;
  desc[1].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
  desc[1].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
  desc[2].SemanticName = "COLOR";
  desc[2].Format = DXGI_FORMAT_R8G8B8A8_UNORM;
  desc[2].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
  desc[2].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
With this I'm getting random triangles on the screen that change from frame to frame, no idea what's going on there. Ideally I would like to avoid vertex transformation so I can use screen coordinates (0..width) instead of (-1..1), but using POSITIONT semantic results in nothing on the screen at all. Is there any way to debug what's going on in the pipeline? Edited by d07RiV

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I'd prefer to stay away from such libraries since its going in a DLL and footprint size is fairly important.

Anyway thanks for the link I'll see if I can make anything useful out of their source code. SpriteBatch seems like the thing I need, I'll try to minimize the code.


Is there anything similar to XYZRHW in d3d11 to bypass viewport transform so I can specify screen coordinates along with a passthrough VS? Also, if I change the viewport,

will the (-1,1) still be mapped to the whole window (and subsequently clipped) or to the new viewport?

Edited by d07RiV

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