DirectX Tutorial 01

8/10/2019 DirectX Tutorial 01

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Direct3D Shader

Programming

HLSL (High Level Shader Language)

-Introduction to DirectX / HLSL

-Tutorial01

- Fixed pipe-line version- Programmable pipe-line (shader) version


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Today

Introduction to DirectX / HLSL

Tutorial01

- Fixed pipeline version

- Programmable pipeline (shader) version


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DirectX / HLSL


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DirectX(1/2)

1994WinG

2Dsprite

bitmapAPIAPI

5 (KOEI)

1995DirectX 1.0

1995WinGGDI

1996DirectX 2.0

DOSWindows

1994DirectX 3.0, 1997DirectX 5.0,

1998DirectX 6.0, 1999DirectX 7.0


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DirectX(2/2)

2000DirectX 8.0

AssemblerShader

200212DirectX 9.0,

HLSL

9.0a (2003.3), 9.0b (2003.8), 9.0c (2003.8)

200611Directx 10.0 Geometry shader

10.1 (2008.2, 2009.4)

200910DirectX 11.0 Hull shader, Domain shader

11.1 (2011.2, windows 8.0), 11.2 (, windows 8.1)


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DirectX

object

object

E.g. Direct3D objectDirect3DDevice object

3D graphics

2D graphics

Audio

Game input

Not Recommended


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Direct3D

Microsoft DirectXgraphics

O/Sgraphics hardware

Direct3D

Immediate Mode


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Direct3D Device

Rendering state(rendering context)

Transformation, lighting, rasterization

2

HAL device

Reference (emulator)

Direct3D


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HLSL(High Level Shader Language)


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HLSL (High Level Shader Language)

High level shader language by Microsoft

Included in DX 9.0, 10.0, 10.1, 11.0 spec. and

Visual Studio .NET

Assembler type shader language in DX8.0

Similar syntax to C with many restrictions and

exceptions


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Preprocessor

#define

#elif

#else

#endif

#error

#if

#include

#line

#undef


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Types (1/2)

Basic types float

Int

bool

double

Half

Structure and Array

Texture.

Texture arrayDirect3D11

Structurearray element

.


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Types (2/2)

Vectors and Matrices

Type definition to shorthand user defined types

float1, float2, float3, float4

Float1x1, float1x2

float4x4 Defined for all basic types

Int1~4, half1~4, etc.

Component access and swizzles supported on vector/

matrix types

FloatVector.xyz

FloatVector.yyxz

FloatMatrix._11_12 or FloatMatrix[1][1]


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Variables

Local/ global

Global

Uniform

Can be set from the outside (CPU

Const

Cannot be modified by the shader program

Static

Not externally visible

Can have initializers Can have semantics for function parameters


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Texture & Sampler

Texture

Direct3DTexture9

Sampler : filtering

samplertexturemapping

H/W shader version

HLSL 3.016 Filtering, address modesampler

SetSamplerState


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Operators

Almost all of C operators

Including ?:, ++, --, +=, -=, etc

No new language semantics

Despite temptation

Arithmetic operators are per component

Matrix multiply is an intrinsic function

Logical operators are per component

No bitwise operators


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Statement Syntax

{ [statements] }

[expression] ;

return [expression] ;

if ( expression ) statement [else statement]

for ( [expression | variable_declaration] ;

[expression] ; [expression] ) statement


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Some Intrinsic functions

Function Syntax Explanation

sqrt value sqrt(value a) Square root

exp2 value exp2(value a) Base 2 Exp

log2 value log2(value a) Base 2 Log

min value min(value a, value b) Maximum

max value max(value a, value b) Minimum

abs value abs(value a, value b) Absolute value

len float len(value a) Vector length

det float det(value a) Matrix determinant

dot float dot(value a) Dot product

mul value mul(value a, value b) Matrix multiplication

any float any(value a) Logical OR of all input components

all float all(value a) Logical AND of all input components


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User Functions

Standard C-like functions

Output type and input parameters

Parameters can be passed by copy in/copy out

mechanism in/ out declaration

In-lined internally - no recursion

Have no statcks


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Functions (cont.)

In the same effect only- Static (not externally

accessible)

Parameters can be marked const

Parameters can have default initializers


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Differences from C

No pointers

No recursion

Limitation of loop count and nesting


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HLSL Summary

Ease of Use

Enable software developers

Consistency of Implementation

Enable multiple vendors

Management of Evolution

Enable multiple generations


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Shader Model

HLSLversion

Under 1_1

()

DirectX SDK

2_a

(unrolling)

3_0, 4_0, 5_0

Dynamic branching (jump)

dynamic1

256(loop counter register, 8bit)


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Tutorial 01. Fixed pipeline version


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Tutorial 01: CreateDevice

windows frameworkdirect3d

Tutorial 01

Direct3D

Scene rendering

Direct3D

Direct3D

1) application window

2) Direct3D object

3) Direct3DDevice object

4)objects

5) Rendering


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Windows

RegisterClassEx()

CreateWindow()

ShowWindow(), UpdateWindow()

Message Loop

GetMessage()

TranslateMessage()

DispatchMessage()

Message loop


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Windows Message Loop

D3D

RegisterClassEx()

CreateWindow()

InitD3D()Direct3D.

ShowWindow(), UpdateWindow()

Message Loop

GetMessage()

TranslateMessage()

DispatchMessage()

Render()Direct3D Message loopDirect3D


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Step 1 - Creating a Window

WinMainwindows application framework

Message


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Step 2 - Initializing Direct3D (1/3)

WindowDirect3DDirect3DDevice

D3D_SDK_VERSION :SDKversion

,

// full screen

// double buffering

// windows


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,



,

// full screen

// double buffering

// windows


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Back frame buffer

Double buffering (D3DSWAPEFFECT_DISCARD )

Depth/ stencil

buffer

Screen

Graphic H/w

Buffers for Rendering

Color buffer, depth buffer, stencil buffer

Color buffer :

Depth/ stencil buffer : color buffermasking

, color buffer

1:1.

Front frame buffer


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Front frame buffer

Double buffering (D3DSWAPEFFECT_DISCARD )

Depth/ stencil

buffer

Screen

Graphic H/w

Buffers for Rendering

Color buffer, depth buffer, stencil buffer

Color buffer :

Depth/ stencil buffer : color buffermasking

, color buffer

1:1.

Back frame buffer


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Direct3DDevice


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CreateDevice()

[in] UINTAdapter:

D3DADAPTER_DEFAULT :adapter

[in] D3DDEVTYPEDeviceType:

,

D3DDEVTYPE_HAL: H/W

rendering [in] HWNDhFocusWindow (hWnd)

[in] DWORDBehaviorFlags

Deviceflag

D3DCREATE_SOFTWARE_VERTEXPROCESSING

D3DCREATE_HARDWARE_VERTEXPROCESSING

[in, out] D3DPRESENT_PARAMETERS pPresentationParameters: &d3dpp [out, retval] IDirect3DDevice9ppReturnedDeviceInterface : &g_pd3dDevice

Device


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Step 3 - Handling System

Messages

Windows message queue

rendering

Message infinite loop

- message(get),

-(translate),

- message(dispatch).


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Step 3 - Handling System

Messages

render()rendering


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Step 4 - Rendering and Displaying aScene

Back buffer, front buffer-(present)

- OpenGLglFlush(), gluSwapChainBuffers()

Render target, depth stencil buffer- OpenglglClear()

Back bufferrendering

OpenGLglBegin(),

glEnd()


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Clear() & Present()

Clear() : render target, depth/ stencil buffer

,0, NULL

Render targetrectangles

RectangleD3DRECT(long x1, y1, x2, y2 )

render target, depth buffer, stencil buffer|)

D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER | D3DCLEAR_STENCIL, D3DCOLOR_XRGB( 0, 0, 255 ), 1.0f, 0

render target, depth buffer,stensil buffer

render targetrender target.

Present() : back buffer, front buffer NULL()


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Step 5 - Shutting Down

WM_DESTROYDirect3Dobjects


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Tutorial 01. Programable pipeline

(shader ) Version


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Shader version of Tutorial01

Fixed pipeline version

Effect file (shader file, .fx file) loading

Technique setting

Pass setting


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Load a Effect file (.fx)

(CreateEffectFromFile())


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Load a Effect file (.fx)

Shader (.fx file) loading (LPD3DXEFFECT interface)

D3DXCreateEffectFromFile() : 4parameters- LPDIRECT3DDEVICE9 pDevice

- LPCTSTR pSrcFile

- DWORD Flags

- LPD3DXEFFECT *ppEffect)


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Setting A Technique and A Pass :

render()


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Shader Codes (basic_shader.fx)


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Vertex

Processing

Rasterizer

FragmentProcessing

Output Merging

Stream

Pixels

TechniqueTechnique_Basic{

passpass0{

VertexShader= compilevs_3_0VS_Basic();PixelShader = compileps_3_0PS_Basic();

}

passpass1{

VertexShader= compilevs_3_0VS_01();PixelShader = compileps_3_0VS_01();}

}

TechniqueTechnique02{

passpass0{

VertexShader= compilevs_3_0VS_02();PixelShader = compileps_3_0PS_02();

}passpass1{ }

}

TechniqueTechnique03{

passpass0{ }passpass1{ }

}TechniqueTechnique03 { }

struct VS_Input

{float3 Pos : POSITION;

float4 Color : COLOR0;};

struct PS_Input

{float4 Pos : POSITION;

float4 Color : COLOR0;

};

PS_Input VS_Basic(VS_Input In){

PS_Input Out = (PS_Input);

returnOut;

}

float4 PS_Basic(PS_Input In) : COLOR0

{returnIn.Color;

}

No Input

Effect file

Effect fileload,techniquetechniquepass

(set)rendering pass

Effect

D3DXCreateEffectFromFile()

Technique_Basic

SetTechnique("Technique_Basic)

pass0

Begin(&Passes, 0)

BeginPass(0)

VS_Basic()

PS_Basic()

0 1 15

No Drawing


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Tomorrow

Tutorial02

- Fixed pipeline version

- Programmable pipeline (shader) version

DirectX Tutorial 01

Documents

Transcript of DirectX Tutorial 01