Thread: Directx 9 2D

I'm trying to draw some 2D images in Microsoft Visual Studio 2005 c++ using DirectX. So far I'm doing ok, but I cant quite make the pixels on the images as clear as they are in the actual image files. I would like them to be the same pixel per pixel.


I've been trying 2 different methods, one using the 3D environment and using a setup to look at the image as if it was on a 2D screen.

And another where I just use absolute screen positioning.

Both methods blur the images a little.

Here is a picture showing what I get. I want it to look like the bottom line.
http://img207.imageshack.us/img207/8553/44157057.png


Here is the code I'm using

Code:

// test.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "test.h"
// include the basic windows header files and the Direct3D header file
#include <windows.h>
#include <windowsx.h>
#include <d3d9.h>
#include <d3dx9.h>

// define the screen resolution
#define SCREEN_WIDTH 800
#define SCREEN_HEIGHT 600

// include the Direct3D Library files
#pragma comment (lib, "d3d9.lib")
#pragma comment (lib, "d3dx9.lib")

// global declarations
LPDIRECT3D9 d3d;    // the pointer to our Direct3D interface
LPDIRECT3DDEVICE9 d3ddev;    // the pointer to the device class
LPDIRECT3DVERTEXBUFFER9 v_buffer = NULL;    // the pointer to the vertex buffer
LPDIRECT3DVERTEXBUFFER9 v_buffer2 = NULL;    // the pointer to the vertex buffer
LPDIRECT3DTEXTURE9      g_pTexture = NULL; // Our texture


// function prototypes
void initD3D(HWND hWnd);    // sets up and initializes Direct3D
void render_frame(void);    // renders a single frame
void cleanD3D(void);    // closes Direct3D and releases memory
void init_graphics(void);    // 3D declarations


//3D VERTEX STRUCT
struct CUSTOMVERTEX {FLOAT X, Y, Z, tu, tv; DWORD COLOR;};
#define CUSTOMFVF (D3DFVF_XYZ | D3DFVF_TEX1)

//ABSOLUTE VERTEX STRUCT
struct CUSTOMFLATVERTEX {FLOAT X, Y, Z, rhw, tu, tv ; DWORD COLOR;};
#define CUSTOMFLATFVF (D3DFVF_XYZRHW  | D3DFVF_TEX1)



// the WindowProc function prototype
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);


// the entry point for any Windows program
int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
    HWND hWnd;
    WNDCLASSEX wc;

    ZeroMemory(&wc, sizeof(WNDCLASSEX));

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.lpszClassName = L"WindowClass";

    RegisterClassEx(&wc);

    hWnd = CreateWindowEx(NULL, L"WindowClass", L"Our Direct3D Program",
                          WS_OVERLAPPEDWINDOW, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
                          NULL, NULL, hInstance, NULL);

    ShowWindow(hWnd, nCmdShow);

    // set up and initialize Direct3D
    initD3D(hWnd);

    // enter the main loop:

    MSG msg;

    while(TRUE)
    {
        while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }

        if(msg.message == WM_QUIT)
            break;

        render_frame();
    }

    // clean up DirectX and COM
    cleanD3D();

    return msg.wParam;
}


// this is the main message handler for the program
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch(message)
    {
        case WM_DESTROY:
            {
                PostQuitMessage(0);
                return 0;
            } break;
    }

    return DefWindowProc (hWnd, message, wParam, lParam);
}


// this function initializes and prepares Direct3D for use
void initD3D(HWND hWnd)
{
    d3d = Direct3DCreate9(D3D_SDK_VERSION);

    D3DPRESENT_PARAMETERS d3dpp;

    ZeroMemory(&d3dpp, sizeof(d3dpp));
    d3dpp.Windowed = TRUE;
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpp.hDeviceWindow = hWnd;
    d3dpp.BackBufferFormat = D3DFMT_A8R8G8B8;
    d3dpp.BackBufferWidth = SCREEN_WIDTH;
    d3dpp.BackBufferHeight = SCREEN_HEIGHT;



    // create a device class using this information and the info from the d3dpp stuct
    d3d->CreateDevice(D3DADAPTER_DEFAULT,
                      D3DDEVTYPE_HAL,
                      hWnd,
                      D3DCREATE_HARDWARE_VERTEXPROCESSING,//D3DCREATE_SOFTWARE_VERTEXPROCESSING, D3DCREATE_MIXED_VERTEXPROCESSING
                      &d3dpp,
                      &d3ddev);



	// Turn off culling
	d3ddev->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );

	// Turn off D3D lighting
	d3ddev->SetRenderState( D3DRS_LIGHTING, FALSE );

	// Turn off the zbuffer
	d3ddev->SetRenderState(D3DRS_ZENABLE,D3DZB_FALSE);

	//alpha blending enabled
	d3ddev->SetRenderState(D3DRS_ALPHABLENDENABLE,TRUE);

	//source blend factor
	d3ddev->SetRenderState(D3DRS_SRCBLEND,D3DBLEND_SRCALPHA);

	//no looping texture
	d3ddev->SetSamplerState(0,D3DSAMP_ADDRESSU,D3DTADDRESS_CLAMP);
	d3ddev->SetSamplerState(0,D3DSAMP_ADDRESSV,D3DTADDRESS_CLAMP);





	init_graphics();    // call the function to initialize the triangle

}


// this is the function used to render a single frame
void render_frame(void)
{
    d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);

    d3ddev->BeginScene();

    

 
	///DRAW 3D IMAGE/////
    D3DXMATRIX matView;    // the view transform matrix

    D3DXMatrixLookAtLH(&matView,
                       &D3DXVECTOR3 (SCREEN_WIDTH/2, SCREEN_HEIGHT/2, SCREEN_HEIGHT/2),    // the camera position
                       &D3DXVECTOR3 (SCREEN_WIDTH/2, SCREEN_HEIGHT/2, 0.0f),    // the look-at position
                       &D3DXVECTOR3 (0.0f, -1.0f, 0.0f));    // the up direction

    d3ddev->SetTransform(D3DTS_VIEW, &matView);    // set the view transform to matView

    D3DXMATRIX matProjection;     // the projection transform matrix

    D3DXMatrixPerspectiveFovLH(&matProjection,
                               D3DXToRadian(90),    // the horizontal field of view
                               (FLOAT)SCREEN_WIDTH / (FLOAT)SCREEN_HEIGHT, // aspect ratio
                               1.0f,    // the near view-plane
                               SCREEN_HEIGHT/2+10);    // the far view-plane

    d3ddev->SetTransform(D3DTS_PROJECTION, &matProjection);    // set the projection
	d3ddev->SetTexture( 0, g_pTexture );
	// select which vertex format we are using
    d3ddev->SetFVF(CUSTOMFVF);
    // select the vertex buffer to display
    d3ddev->SetStreamSource(0, v_buffer, 0, sizeof(CUSTOMVERTEX));

    // copy the vertex buffer to the back buffer
    d3ddev->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);






	//DRAW ABSOLUTE IMAGE
	d3ddev->SetTexture( 0, g_pTexture );
	// select which vertex format we are using
    d3ddev->SetFVF(CUSTOMFLATFVF);
	// select the vertex buffer to display
    d3ddev->SetStreamSource(0, v_buffer2, 0, sizeof(CUSTOMFLATVERTEX));
    // copy the vertex buffer to the back buffer
    d3ddev->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);

    d3ddev->EndScene();

    d3ddev->Present(NULL, NULL, NULL, NULL);
}


// this is the function that cleans up Direct3D and COM
void cleanD3D(void)
{
    v_buffer->Release();    // close and release the vertex buffer
    d3ddev->Release();    // close and release the 3D device
    d3d->Release();    // close and release Direct3D
    g_pTexture->Release();
    v_buffer2->Release();
  
}


// this is the function that puts the 3D models into video RAM
void init_graphics(void)
{

	//LOAD TEXTURE
	D3DXIMAGE_INFO SrcInfo;      //Optional

	//Use a magenta colourkey
	D3DCOLOR colorkey = 0xFFFF00FF;

	if (FAILED(D3DXCreateTextureFromFileEx (d3ddev, L"banana.png", D3DX_DEFAULT_NONPOW2, D3DX_DEFAULT_NONPOW2, 0, 0, 
        D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, D3DX_DEFAULT, D3DX_DEFAULT, 
        colorkey, &SrcInfo, NULL, &g_pTexture)))
	{
		;
	}


    // create the vertices using the CUSTOMVERTEX struct
     CUSTOMVERTEX vertices[] = 
    {	{ 50.0f, 50.0f+32.0f, 1.0f,			0.0f, 1.0f,	D3DCOLOR_XRGB(255, 0, 0), },
        { 50.0f, 50.0f, 1.0f,				0.0f, 0.0f,	D3DCOLOR_XRGB(255, 0, 0), },
        { 50.0f+32.0f, 50.0f+32.0f, 1.0f,	1.0f, 1.0f,	D3DCOLOR_XRGB(0, 0, 255), },     
        { 50.0f+32.0f, 50.0f, 1.0f,			1.0f, 0.0f,	D3DCOLOR_XRGB(0, 255, 0), },
    }; 

	CUSTOMFLATVERTEX vertices2[] = 
	{
		{0.0f,	32.0f,	0.0f, 1.0f,			0.0f, 1.0f, D3DCOLOR_XRGB(255,255,255),},
		{0.0f, 0.0f,	0.0f, 1.0f,			0.0f, 0.0f, D3DCOLOR_XRGB(255, 255, 255),},
		{32.0f,	32.0f,	0.0f, 1.0f,			1.0f, 1.0f, D3DCOLOR_XRGB(255, 255, 255),},
		{32.0f, 0.0f,	0.0f, 1.0f,			1.0f, 0.0f, D3DCOLOR_XRGB(255, 255, 255),},		
	};

    // create a vertex buffer interface called v_buffer
    d3ddev->CreateVertexBuffer(4*sizeof(CUSTOMVERTEX),
                               0,
                               CUSTOMFVF,
                               D3DPOOL_MANAGED,
                               &v_buffer,
                               NULL);

	d3ddev->CreateVertexBuffer(4*sizeof(CUSTOMFLATVERTEX),
                               0,
                               CUSTOMFLATFVF,
                               D3DPOOL_MANAGED,
                               &v_buffer2,
                               NULL);

    VOID* pVoid;    // a void pointer

    // lock v_buffer and load the vertices into it
    v_buffer->Lock(0, 0, (void**)&pVoid, 0);
    memcpy(pVoid, vertices, sizeof(vertices));
    v_buffer->Unlock();

	v_buffer2->Lock(0, 0, (void**)&pVoid, 0);
    memcpy(pVoid, vertices2, sizeof(vertices2));
    v_buffer2->Unlock();
}