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D3D: add bicubic gpu scaler.

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aliaspider committed 2018-03-28 22:15:48 +01:00
1 parent e7c044628e
commit 0df57653c1
1 file changed
+43 -4
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GPU/Directx9/PixelShaderGeneratorDX9.cpp
+43 -4
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@@ -37,9 +37,6 @@ static const char* sampler_default =
" return tex_sample_direct(coord);\n"
"};\n";
static const char* sampler_hybrid = sampler_default;
static const char* sampler_bicubic = sampler_default;
static const char* sampler_hybrid_bicubic = sampler_default;
static const char* sampler_gaussian =
"#define sharpness 1.0\n"
"#define pi 3.14159265358\n"
@@ -95,7 +92,7 @@ static const char* sampler_cosine =
" tempColor+=c*KERNEL(pos.x,sharpness)*KERNEL(pos.y,sharpness);\n"
" }\n"
" }\n"
" return tempColor;\n"
" return tempColor.rgba;\n"
"};\n";
static const char* sampler_xbrz =
"float c_df(float4 c1, float4 c2) {\n"
@@ -325,6 +322,48 @@ static const char* sampler_sabr =
" return res;\n"
"}\n";
static const char* sampler_hybrid = sampler_xbrz;
static const char* sampler_hybrid_bicubic = sampler_xbrz;
static const char* sampler_bicubic =
"// generate the value of a Mitchell-Netravali scaling spline at distance d, with parameters A and B\n"
"// B=1 C=0 : cubic B spline (very smooth)\n"
"// B=C=1/3 : recommended for general upscaling\n"
"// B=0 C=1/2 : Catmull-Rom spline (sharp, ringing)\n"
"// see Mitchell & Netravali, \"Reconstruction Filters in Computer Graphics\"\n"
"\n"
"//#define BSPLINE\n"
"#ifdef BSPLINE\n"
" static const float B = 1.0f;\n"
" static const float C = 0.0f;\n"
"#else\n"
" static const float B = 1.0f / 3.0f;\n"
" static const float C = 1.0f / 3.0f;\n"
"#endif\n"
"float mitchell(float2 pos) {\n"
" float x = sqrt(dot(pos, pos));\n"
" return\n"
" step(x, 2.0) * \n"
" (step(1.0, x) * ((-B - 6 * C)*(x*x*x) + (6 * B + 30 * C)*(x*x) + (-12 * B - 48 * C)*x + (8 * B + 24 * C)) +\n"
" step(x, 1.0) * ((12 - 9 * B - 6 * C)*(x*x*x) + (-18 + 12 * B + 6 * C)*(x*x) + (6 - 2 * B)))\n"
" / 6.0f;\n"
"}\n"
"float4 tex_sample(float2 coord) {\n"
" float2 offset = frac(coord * u_texSize.xy) - 0.5;\n"
" float4 tempColor = 0.0;\n"
" float4 c;\n"
" float i,j;\n"
" float2 pos;\n"
" for (i = -2.0; i < 3.0; i++){\n"
" pos.x = offset.x - i;\n"
" for (j = -2.0; j < 3.0 ;j++){\n"
" pos.y = offset.y - j;\n"
" c=tex_sample_direct(coord - pos * u_texSize.zw).rgba;\n"
" tempColor+=c*mitchell(pos);\n"
" }\n"
" }\n"
" return tempColor;\n"
"};\n";
// Missing: Z depth range
// Also, logic ops etc, of course, as they are not supported in DX9.
bool GenerateFragmentShaderHLSL(const FShaderID &id, char *buffer, ShaderLanguage lang) {