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source: data/trunk/programs/OldMovieFP.cg @ 8585

Last change on this file since 8585 was 7708, checked in by dafrick, 14 years ago

Merging cleanup branch. You will need to update your data repository as well as your local copy of the code.

  • Property svn:eol-style set to native
File size: 1.6 KB
Line 
1sampler RT : register(s0);
2sampler SplotchesTx : register(s1);
3sampler Texture2 : register(s2);
4sampler SepiaTx : register(s3);
5
6float2 calcSpriteAddr(float2 texCoord, float DirtFrequency, float period)
7{
8   return texCoord + tex1D(Texture2, period  * DirtFrequency);
9}
10
11float4 getSplotches(float2 spriteAddr)
12{
13   // get sprite address into paged texture coords space
14   spriteAddr = spriteAddr / 6.3f;
15   //spriteAddr = spriteAddr - frac(spriteAddr);
16   spriteAddr = spriteAddr - (spriteAddr /33.3f);
17
18   return tex2D(SplotchesTx, spriteAddr);
19}
20
21float4 OldMovie_ps (float2 texCoord  : TEXCOORD0,
22                                uniform float time_cycle_period,
23                                uniform float flicker,
24                                uniform float DirtFrequency,
25                                uniform float3 luminance,
26                                uniform float frameJitter,
27                                uniform float lumiShift
28                                ) : COLOR
29{
30
31   // get sprite address
32   float2 spriteAddr = calcSpriteAddr(texCoord, DirtFrequency, time_cycle_period);
33
34    // add some dark and light splotches to the film
35   float4 splotches = getSplotches(spriteAddr);
36   float4 specs = 1.0f - getSplotches(spriteAddr / 3.0f);
37
38   // convert color to base luminance
39   float4 base = tex2D(RT, texCoord + float2(0, spriteAddr.y * frameJitter));
40   float lumi = dot(base.rgb, luminance);
41   // randomly shift luminance
42   lumi -= spriteAddr.x * lumiShift;
43   // tone map luminance
44   base.rgb = tex1D(SepiaTx, lumi );
45
46   // calc flicker speed
47   float darken = frac(flicker * time_cycle_period);
48
49   // we want darken to cycle between 0.6 and 1.0
50   darken = abs(darken - 0.5f) * 0.4f + 0.6f;
51   // composite dirt onto film
52   return base * splotches * darken + specs;
53}
54
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