From e21b1c797955a231f2bcf71818e0259fbb6aeba1 Mon Sep 17 00:00:00 2001
From: Runt <qingingrunt2010@qq.com>
Date: Fri, 27 Jun 2025 15:57:25 +0000
Subject: [PATCH] 相机权限
---
LiveProject/shader/Shaders.metal | 63 +++++++++++++++++++++++++++++++
1 files changed, 63 insertions(+), 0 deletions(-)
diff --git a/LiveProject/shader/Shaders.metal b/LiveProject/shader/Shaders.metal
index e69de29..5151b97 100644
--- a/LiveProject/shader/Shaders.metal
+++ b/LiveProject/shader/Shaders.metal
@@ -0,0 +1,63 @@
+//
+// Shaders.metal
+// LiveProject
+//
+// Created by 倪路朋 on 6/27/25.
+//
+
+#include <metal_stdlib>
+using namespace metal;
+
+struct VertexOut {
+ float4 position [[position]];
+ float2 texCoord;
+};
+
+struct Uniforms {
+ float2 textureSize;
+ float2 drawableSize;
+};
+
+vertex VertexOut vertex_main(uint vertexID [[vertex_id]],
+ constant Uniforms& uniforms [[buffer(0)]]) {
+ float4 positions[4] = {
+ float4(-1.0, -1.0, 0, 1),
+ float4( 1.0, -1.0, 0, 1),
+ float4(-1.0, 1.0, 0, 1),
+ float4( 1.0, 1.0, 0, 1)
+ };
+
+ float2 texCoords[4] = {
+ float2(0.0, 1.0),
+ float2(1.0, 1.0),
+ float2(0.0, 0.0),
+ float2(1.0, 0.0)
+ };
+
+ float texAspect = uniforms.textureSize.x / uniforms.textureSize.y;
+ float viewAspect = uniforms.drawableSize.x / uniforms.drawableSize.y;
+
+ float scaleX = 1.0;
+ float scaleY = 1.0;
+
+ if (texAspect > viewAspect) {
+ scaleY = viewAspect / texAspect;
+ } else {
+ scaleX = texAspect / viewAspect;
+ }
+
+ VertexOut out;
+ float4 pos = positions[vertexID];
+ pos.x *= scaleX;
+ pos.y *= scaleY;
+
+ out.position = pos;
+ out.texCoord = texCoords[vertexID];
+ return out;
+}
+
+fragment float4 fragment_main(VertexOut in [[stage_in]],
+ texture2d<half> tex [[texture(0)]]) {
+ constexpr sampler s(filter::linear);
+ return float4(tex.sample(s, in.texCoord));
+}
--
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