61 lines
1.7 KiB
Metal
61 lines
1.7 KiB
Metal
#include <metal_stdlib>
|
|
#include <simd/simd.h>
|
|
#include <metal_math>
|
|
|
|
using namespace metal;
|
|
|
|
/* For GLSL compatibility */
|
|
typedef float2 vec2;
|
|
typedef float3 vec3;
|
|
typedef float4 vec4;
|
|
typedef texture2d<half> sampler2D;
|
|
#define equal(x, y) all((x) == (y))
|
|
#define inequal(x, y) any((x) != (y))
|
|
#define STATIC static
|
|
|
|
typedef struct {
|
|
float4 position [[position]];
|
|
float2 texcoords;
|
|
} rasterizer_data;
|
|
|
|
// Vertex Function
|
|
vertex rasterizer_data vertex_shader(uint index [[ vertex_id ]],
|
|
constant vector_float2 *vertices [[ buffer(0) ]])
|
|
{
|
|
rasterizer_data out;
|
|
|
|
out.position.xy = vertices[index].xy;
|
|
out.position.z = 0.0;
|
|
out.position.w = 1.0;
|
|
out.texcoords = (vertices[index].xy + float2(1, 1)) / 2.0;
|
|
|
|
return out;
|
|
}
|
|
|
|
|
|
static inline float4 texture(texture2d<half> texture, float2 pos)
|
|
{
|
|
constexpr sampler texture_sampler;
|
|
return float4(texture.sample(texture_sampler, pos));
|
|
}
|
|
|
|
#line 1
|
|
{filter}
|
|
|
|
fragment float4 fragment_shader(rasterizer_data in [[stage_in]],
|
|
texture2d<half> image [[ texture(0) ]],
|
|
texture2d<half> previous_image [[ texture(1) ]],
|
|
constant bool *mix_previous [[ buffer(0) ]],
|
|
constant float2 *output_resolution [[ buffer(1) ]])
|
|
{
|
|
float2 input_resolution = float2(image.get_width(), image.get_height());
|
|
|
|
in.texcoords.y = 1 - in.texcoords.y;
|
|
if (*mix_previous) {
|
|
return mix(scale(image, in.texcoords, input_resolution, *output_resolution),
|
|
scale(previous_image, in.texcoords, input_resolution, *output_resolution), 0.5);
|
|
}
|
|
return scale(image, in.texcoords, input_resolution, *output_resolution);
|
|
}
|
|
|