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It does, but I think most of the performance hit comes from the fact that the GPU's got more pixels to draw.AA usually affects Vram I think
Your CPU is bottlenecking your GPU a lot actually if the GPU usage is really low and the CPU really high.
AA usually affects Vram I think, so it shouldn't hurt your CPU much.
34 on the benchmarkGive it a try?
GTA IV really likes quad cores and up. So only way to really find out is to apply the AA and compare the results.
what FPS do you normally get?
Since when does GTAIV use AA?
You can enable it through control panel can't you?
There is also a mod called ENB that will give you SSAA, but will bring most cards to their knees.
its a shitty console engine that doesnt!
That's all "real" AA is doing. It's just smart enough to limit the extra samples to the edges, for performance's sake.Yes, partially, cause its not real AA, its doubles your resolution and downscales it.
That's all "real" AA is doing. It's just smart enough to limit the extra samples to the edges, for performance's sake.
I know. And that's called 4xSSAA.Actually, no. It literally doubles the res, see below.
actually it's a limitation of your shitty PC graphics API / hardware. in deferred style renderers, hardware MSAA doesn't work outside of driver hacks in DX9.
it's not even a particularly good idea in DX10/11 for performance reasons, even though it can be given a faster implementation there.
Actually, no. It literally doubles the res, see below.
Its a hack, not real AA at all.
(BTW, that was downscaling to 1368x768)
I don't think SG-SSAA can work with GTAIV even with a driver hack, because SG-MSAA can't.Only MLAA for AMD owners, or a hack for SGSSA for Nvidia owners. Regular MSAA does not work with this engine.
There is also a mod called ENB that will give you SSAA, but will bring most cards to their knees.
/*============================================================================
FXAA3 QUALITY - PC
NVIDIA FXAA III.8 by TIMOTHY LOTTES
============================================================================*/
#define FXAA_LINEAR 0
#define FXAA_QUALITY__EDGE_THRESHOLD (1.0/16.0)
#define FXAA_QUALITY__EDGE_THRESHOLD_MIN (1.0/16.0)
#define FXAA_QUALITY__SUBPIX_CAP (3.0/4.0)
#define FXAA_QUALITY__SUBPIX_TRIM (1.0/4.0)
#define FXAA_QUALITY__SUBPIX_TRIM_SCALE (1.0/(1.0 - FXAA_QUALITY__SUBPIX_TRIM))
#define FXAA_SEARCH_STEPS 8
#define FXAA_SEARCH_THRESHOLD (1.0/4.0)
float4 FxaaPixelShader(VS_OUTPUT_POST IN, float2 vPos : VPOS) : COLOR
{
#define FxaaTexTop(t, p) tex2Dlod(t, float4(p, 0.0, 0.0))
#define FxaaTexOff(t, p, o, r) tex2Dlod(t, float4(p + (o * r), 0, 0))
float2 pos = IN.txcoord.xy;
float2 rcpFrame = float2(1/ScreenSize, ScreenScaleY/ScreenSize);
float4 rcpFrameOpt = float4(2/ScreenSize, 2*ScreenScaleY/ScreenSize, 0.5/ScreenSize, 0.5*ScreenScaleY/ScreenSize);
float lumaN = dot(FxaaTexOff(SamplerColor, pos.xy, float2(0, -1), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float lumaW = dot(FxaaTexOff(SamplerColor, pos.xy, float2(-1, 0), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float4 rgbyM;
rgbyM.xyz = FxaaTexTop(SamplerColor, pos.xy).xyz;
rgbyM.w = dot(rgbyM.xyz, float3(0.299, 0.587, 0.114));
float lumaE = dot(FxaaTexOff(SamplerColor, pos.xy, float2( 1, 0), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float lumaS = dot(FxaaTexOff(SamplerColor, pos.xy, float2( 0, 1), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float lumaM = rgbyM.w;
float rangeMin = min(lumaM, min(min(lumaN, lumaW), min(lumaS, lumaE)));
float rangeMax = max(lumaM, max(max(lumaN, lumaW), max(lumaS, lumaE)));
float range = rangeMax - rangeMin;
if(range < max(FXAA_QUALITY__EDGE_THRESHOLD_MIN, rangeMax * FXAA_QUALITY__EDGE_THRESHOLD)) return rgbyM;
float lumaNW = dot(FxaaTexOff(SamplerColor, pos.xy, float2(-1,-1), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float lumaNE = dot(FxaaTexOff(SamplerColor, pos.xy, float2( 1,-1), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float lumaSW = dot(FxaaTexOff(SamplerColor, pos.xy, float2(-1, 1), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float lumaSE = dot(FxaaTexOff(SamplerColor, pos.xy, float2( 1, 1), rcpFrame.xy).xyz, float3(0.299, 0.587, 0.114));
float lumaL = (lumaN + lumaW + lumaE + lumaS) * 0.25;
float rangeL = abs(lumaL - lumaM);
float blendL = saturate((rangeL / range) - FXAA_QUALITY__SUBPIX_TRIM) * FXAA_QUALITY__SUBPIX_TRIM_SCALE;
blendL = min(FXAA_QUALITY__SUBPIX_CAP, blendL);
float edgeVert = abs(lumaNW + (-2.0 * lumaN) + lumaNE) + 2.0 * abs(lumaW + (-2.0 * lumaM) + lumaE ) + abs(lumaSW + (-2.0 * lumaS) + lumaSE);
float edgeHorz = abs(lumaNW + (-2.0 * lumaW) + lumaSW) + 2.0 * abs(lumaN + (-2.0 * lumaM) + lumaS ) + abs(lumaNE + (-2.0 * lumaE) + lumaSE);
bool horzSpan = edgeHorz >= edgeVert;
float lengthSign = horzSpan ? -rcpFrame.y : -rcpFrame.x;
if(!horzSpan) lumaN = lumaW;
if(!horzSpan) lumaS = lumaE;
float gradientN = abs(lumaN - lumaM);
float gradientS = abs(lumaS - lumaM);
lumaN = (lumaN + lumaM) * 0.5;
lumaS = (lumaS + lumaM) * 0.5;
bool pairN = gradientN >= gradientS;
if(!pairN) lumaN = lumaS;
if(!pairN) gradientN = gradientS;
if(!pairN) lengthSign *= -1.0;
float2 posN;
posN.x = pos.x + (horzSpan ? 0.0 : lengthSign * 0.5);
posN.y = pos.y + (horzSpan ? lengthSign * 0.5 : 0.0);
gradientN *= FXAA_SEARCH_THRESHOLD;
float2 posP = posN;
float2 offNP = horzSpan ?
float2(rcpFrame.x, 0.0) :
float2(0.0f, rcpFrame.y);
float lumaEndN;
float lumaEndP;
bool doneN = false;
bool doneP = false;
posN += offNP * (-1.5);
posP += offNP * ( 1.5);
for(int i = 0; i < FXAA_SEARCH_STEPS; i++)
{
lumaEndN = dot(FxaaTexTop(SamplerColor, posN.xy).xyz, float3(0.299, 0.587, 0.114));
lumaEndP = dot(FxaaTexTop(SamplerColor, posP.xy).xyz, float3(0.299, 0.587, 0.114));
bool doneN2 = abs(lumaEndN - lumaN) >= gradientN;
bool doneP2 = abs(lumaEndP - lumaN) >= gradientN;
if(doneN2 && !doneN) posN += offNP;
if(doneP2 && !doneP) posP -= offNP;
if(doneN2 && doneP2) break;
doneN = doneN2;
doneP = doneP2;
if(!doneN) posN -= offNP * 2.0;
if(!doneP) posP += offNP * 2.0;
}
float dstN = horzSpan ? pos.x - posN.x : pos.y - posN.y;
float dstP = horzSpan ? posP.x - pos.x : posP.y - pos.y;
bool directionN = dstN < dstP;
lumaEndN = directionN ? lumaEndN : lumaEndP;
if(((lumaM - lumaN) < 0.0) == ((lumaEndN - lumaN) < 0.0))
lengthSign = 0.0;
float spanLength = (dstP + dstN);
dstN = directionN ? dstN : dstP;
float subPixelOffset = 0.5 + (dstN * (-1.0/spanLength));
subPixelOffset += blendL * (1.0/8.0);
subPixelOffset *= lengthSign;
float3 rgbF = FxaaTexTop(SamplerColor, float2(pos.x + (horzSpan ? 0.0 : subPixelOffset), pos.y + (horzSpan ? subPixelOffset : 0.0))).xyz;
#if (FXAA_LINEAR == 1)
lumaL *= lumaL;
#endif
float lumaF = dot(rgbF, float3(0.299, 0.587, 0.114)) + (1.0/(65536.0*256.0));
float lumaB = lerp(lumaF, lumaL, blendL);
float scale = min(4.0, lumaB/lumaF);
rgbF *= scale;
return float4(rgbF, lumaM);
}
so you guys are saying it is possible to achieve aa on gta4?