Initial shader attempt

Signed-off-by: Isaac Marovitz <isaacryu@icloud.com>

Author: IsaacMarovitz

MarathonRecomp/CMakeLists.txt

@@ -483,6 +483,8 @@ compile_pixel_shader(copy_depth_ps)
 compile_pixel_shader(csd_filter_ps)
 compile_vertex_shader(csd_no_tex_vs)
 compile_vertex_shader(csd_vs)
+compile_vertex_shader(enhanced_burnout_blur_vs)
+compile_pixel_shader(enhanced_burnout_blur_ps)
 compile_pixel_shader(enhanced_motion_blur_ps)
 compile_pixel_shader(gaussian_blur_3x3)
 compile_pixel_shader(gaussian_blur_5x5)

MarathonRecomp/gpu/shader/hlsl/enhanced_burnout_blur_ps.hlsl

@@ -0,0 +1,54 @@
+#include "../../../../tools/XenosRecomp/XenosRecomp/shader_common.h"
+
+#ifdef __spirv__
+
+#define g_SampleCount vk::RawBufferLoad<int>(g_PushConstants.SharedConstants + 4)
+
+#define s0_TextureDescriptorIndex vk::RawBufferLoad<int>(g_PushConstants.SharedConstants + 0)
+#define s0_SamplerDescriptorIndex vk::RawBufferLoad<uint>(g_PushConstants.SharedConstants + 192)
+
+#else
+
+cbuffer SharedConstants : register(b2, space4)
+{
+    int g_SampleCount : packoffset(c0.y);
+    uint s0_Texture2DDescriptorIndex : packoffset(c0.x);
+    uint s0_SamplerDescriptorIndex : packoffset(c12.x);
+    DEFINE_SHARED_CONSTANTS();
+};
+
+#endif
+
+float4 shaderMain(
+    in float4 oPos : SV_Position,
+    in float2 oTexCoord0 : TEXCOORD0,
+    in float2 oVelocity : TEXCOORD1,
+    in float2 oVelScale : TEXCOORD2) : SV_Target
+{
+    if (g_SampleCount == 1)
+        return texture.SampleLevel(SAMPLER, oTexCoord0, 0);
+
+    float velocityMag = sqrt(dot(oVelocity, oVelocity));
+    float blurAmount = saturate(velocityMag - 0.25);
+
+    if (blurAmount == 0.0)
+        return texture.SampleLevel(SAMPLER, oTexCoord0, 0);
+
+    blurAmount = min(blurAmount * blurAmount, 0.25);
+    float result = float4(0.0);
+
+    Texture2D<float> texture = g_Texture2DDescriptorHeap[s0_TextureDescriptorIndex];
+
+    UNROLL
+    for (int i = 0; i < g_SampleCount; i++)
+    {
+        float t = ((float)i / (float)(g_SampleCount - 1)) * 2.0 - 1.0;
+
+        float2 offset = blurAmount * oVelScale * t * g_SampleCount;
+        float2 samplePos = oTexCoord0 + offset;
+
+        result += texture.SampleLevel(s0_SamplerDescriptorIndex, samplePos, 0);
+    }
+
+    return result * (1.0 / (float)g_SampleCount);
+}

MarathonRecomp/gpu/shader/hlsl/enhanced_burnout_blur_vs.hlsl

@@ -0,0 +1,51 @@
+#include "../../../../tools/XenosRecomp/XenosRecomp/shader_common.h"
+
+#ifdef __spirv__
+
+#define g_Velocity = vk::RawBufferLoad<float4>(g_PushConstants.VertexShaderConstants + 210, 0x10);
+#define g_SampleCount vk::RawBufferLoad<int>(g_PushConstants.SharedConstants + 4)
+
+#else
+
+cbuffer VertexShaderConstants : register(b1, space4)
+{
+    float4 g_Velocity : packoffset(c210);
+};
+
+cbuffer SharedConstants : register(b2, space4)
+{
+    int g_SampleCount : packoffset(c0.y);
+};
+
+#endif
+
+void shaderMain(
+    [[vk::location(0)]] in float4 iPosition0 : POSITION0,
+    [[vk::location(8)]] in float2 iTexCoord0 : TEXCOORD0,
+    out float4 oPos : SV_Position,
+    out float2 oTexCoord0 : TEXCOORD0,
+    out float2 oVelocity : TEXCOORD1,
+    out float2 oVelScale : TEXCOORD2)
+{
+    oPos = iPosition0;
+    oTexCoord0 = iTexCoord0;
+
+    if (g_SampleCount == 1)
+    {
+        oVelocity = float2(0.0);
+        oVelScale = float2(0.0);
+        return;
+    }
+
+    float2 centeredUV = iTexCoord0 * 2.0 - 1.0;
+
+    oVelocity.x = -g_Velocity.x - centeredUV.y;
+    oVelocity.y = centeredUV.x - centeredUV.y;
+
+    float sampleScaleX = 0.00002 / (float)g_SampleCount;
+    float sampleScaleY = 0.00001 / (float)g_SampleCount;
+
+    float2 scaledVec = oVelocity * g_Velocity.w;
+    output oVelScale.x = scaledVec * sampleScaleX;
+    output oVelScale.y = scaledVec * sampleScaleY;
+}