hey!
Im (would) use DX 8.1 and vertex shader... heres the example:
sampler2D g_samSrcColor;
float4 main( float2 Tex : TEXCOORD0 ) : COLOR0
{
float4 Color;
Color = tex2D( g_samSrcColor, Tex.xy)*4;
return Color;
}
technique PostProcess
{
pass p1
{
VertexShader = null;
PixelShader = compile ps_1_4 main();
}
}
the samples is "converted" to assembly, because 8.1 doesnt know HLSL language:
fxc.exe /nologo /Tps_1_2 /Emain shader.ps > shader.asm
//
// Generated by Microsoft (R) D3DX9 Shader Compiler 9.08.299.0000
//
// fxc /nologo /Tps_1_2 /Emain shader.ps
//
//
// Parameters:
//
// sampler2D g_samSrcColor;
//
//
// Registers:
//
// Name Reg Size
// ------------- ----- ----
// g_samSrcColor s0 1
//
ps.1.2
def c0, 4, 4, 4, 4
tex t0
mul r0, t0, c0
// approximately 2 instruction slots used (1 texture, 1 arithmetic)
this currently does nothing... although theres another example:
ps.1.0
def c0, 1.0f, 1.0f,1.0f, 1.0f
tex t0
sub r0,c0,t0
this works (at least has got effect). Only this example works, this wastebasket doesnt want to work for me!! Any idea why?
