1 files changed, 109 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/render/metal/SDL_shaders_metal.metal b/source/3rd-party/SDL2/src/render/metal/SDL_shaders_metal.metal
new file mode 100644
index 0000000..8df3b75
--- /dev/null
+++ b/source/3rd-party/SDL2/src/render/metal/SDL_shaders_metal.metal
@@ -0,0 +1,109 @@
+#include <metal_texture>
+#include <metal_matrix>
+
+using namespace metal;
+
+struct SolidVertexOutput
+{
+    float4 position [[position]];
+    float pointSize [[point_size]];
+};
+
+vertex SolidVertexOutput SDL_Solid_vertex(const device float2 *position [[buffer(0)]],
+                                          constant float4x4 &projection [[buffer(2)]],
+                                          constant float4x4 &transform [[buffer(3)]],
+                                          uint vid [[vertex_id]])
+{
+    SolidVertexOutput v;
+    v.position = (projection * transform) * float4(position[vid], 0.0f, 1.0f);
+    v.pointSize = 1.0f;
+    return v;
+}
+
+fragment float4 SDL_Solid_fragment(constant float4 &col [[buffer(0)]])
+{
+    return col;
+}
+
+struct CopyVertexOutput
+{
+    float4 position [[position]];
+    float2 texcoord;
+};
+
+vertex CopyVertexOutput SDL_Copy_vertex(const device float2 *position [[buffer(0)]],
+                                        const device float2 *texcoords [[buffer(1)]],
+                                        constant float4x4 &projection [[buffer(2)]],
+                                        constant float4x4 &transform [[buffer(3)]],
+                                        uint vid [[vertex_id]])
+{
+    CopyVertexOutput v;
+    v.position = (projection * transform) * float4(position[vid], 0.0f, 1.0f);
+    v.texcoord = texcoords[vid];
+    return v;
+}
+
+fragment float4 SDL_Copy_fragment(CopyVertexOutput vert [[stage_in]],
+                                  constant float4 &col [[buffer(0)]],
+                                  texture2d<float> tex [[texture(0)]],
+                                  sampler s [[sampler(0)]])
+{
+    return tex.sample(s, vert.texcoord) * col;
+}
+
+struct YUVDecode
+{
+    float3 offset;
+    float3 Rcoeff;
+    float3 Gcoeff;
+    float3 Bcoeff;
+};
+
+fragment float4 SDL_YUV_fragment(CopyVertexOutput vert [[stage_in]],
+                                 constant float4 &col [[buffer(0)]],
+                                 constant YUVDecode &decode [[buffer(1)]],
+                                 texture2d<float> texY [[texture(0)]],
+                                 texture2d_array<float> texUV [[texture(1)]],
+                                 sampler s [[sampler(0)]])
+{
+    float3 yuv;
+    yuv.x = texY.sample(s, vert.texcoord).r;
+    yuv.y = texUV.sample(s, vert.texcoord, 0).r;
+    yuv.z = texUV.sample(s, vert.texcoord, 1).r;
+
+    yuv += decode.offset;
+
+    return col * float4(dot(yuv, decode.Rcoeff), dot(yuv, decode.Gcoeff), dot(yuv, decode.Bcoeff), 1.0);
+}
+
+fragment float4 SDL_NV12_fragment(CopyVertexOutput vert [[stage_in]],
+                                 constant float4 &col [[buffer(0)]],
+                                 constant YUVDecode &decode [[buffer(1)]],
+                                 texture2d<float> texY [[texture(0)]],
+                                 texture2d<float> texUV [[texture(1)]],
+                                 sampler s [[sampler(0)]])
+{
+    float3 yuv;
+    yuv.x = texY.sample(s, vert.texcoord).r;
+    yuv.yz = texUV.sample(s, vert.texcoord).rg;
+
+    yuv += decode.offset;
+
+    return col * float4(dot(yuv, decode.Rcoeff), dot(yuv, decode.Gcoeff), dot(yuv, decode.Bcoeff), 1.0);
+}
+
+fragment float4 SDL_NV21_fragment(CopyVertexOutput vert [[stage_in]],
+                                 constant float4 &col [[buffer(0)]],
+                                 constant YUVDecode &decode [[buffer(1)]],
+                                 texture2d<float> texY [[texture(0)]],
+                                 texture2d<float> texUV [[texture(1)]],
+                                 sampler s [[sampler(0)]])
+{
+    float3 yuv;
+    yuv.x = texY.sample(s, vert.texcoord).r;
+    yuv.yz = texUV.sample(s, vert.texcoord).gr;
+
+    yuv += decode.offset;
+
+    return col * float4(dot(yuv, decode.Rcoeff), dot(yuv, decode.Gcoeff), dot(yuv, decode.Bcoeff), 1.0);
+}