From 8dc5aab8fefb0ab82322acfc05ea916a6a9730ef Mon Sep 17 00:00:00 2001
From: Xiang Silian <youmiss@163.com>
Date: Wed, 24 Sep 2025 23:23:39 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E6=88=90=E8=83=8C=E6=99=AF=E7=9A=84?=
 =?UTF-8?q?=E6=8E=A8=E9=80=81?=
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Content-Transfer-Encoding: 8bit

---
 shaders/texture_loading/glsl/bg.vert     |  21 +++++++--------------
 shaders/texture_loading/glsl/bg.vert.spv | Bin 1592 -> 1836 bytes
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/shaders/texture_loading/glsl/bg.vert b/shaders/texture_loading/glsl/bg.vert
index 0769410..5ff8f1b 100644
--- a/shaders/texture_loading/glsl/bg.vert
+++ b/shaders/texture_loading/glsl/bg.vert
@@ -25,20 +25,6 @@ const vec2 positions[6] = vec2[6](
 );
 
 
-//const float offset = (640-480)/(640.0*2); // 假设宽高比为4:3
-// const float offset = 0;
-
-// const vec2 positions[6] = vec2[6](
-//     vec2( -1.0 - offset,  1.0),  // 右上 -> 左上
-//     vec2(-1.0 - offset,  -1.0),  // 左上 - 左下
-//     vec2(1.0 + offset, -1.0),  // 左下 - 右下
-
-//     vec2(1.0 + offset, -1.0),  // 左下 - 右下  
-//     vec2( 1.0 + offset, 1.0),  // 右下 - 右上
-//     vec2( -1.0 - offset,  1.0)   // 右上 - 左上
-// );
-
-
 
 const vec2 texCoords[6] = vec2[6](
     vec2(1.0, 1.0),  // 右上
@@ -50,12 +36,19 @@ const vec2 texCoords[6] = vec2[6](
     vec2(1.0, 1.0)   // 右上
 );
 
+// 定义 Push Constant，只有一个 float
+layout(push_constant) uniform PushConstants {
+    float myValue;
+} pushConstants;
+
+
 // 输出变量
 layout(location = 0) out vec2 outTexCoord;
 
 void main() {
     // 获取顶点位置
     vec2 position = positions[gl_VertexIndex];
+    position = position * pushConstants.myValue;
     
     // 设置输出位置（Vulkan使用不同的坐标系）
     gl_Position = vec4(position, 0.0, 1.0);
diff --git a/shaders/texture_loading/glsl/bg.vert.spv b/shaders/texture_loading/glsl/bg.vert.spv
index 1d843ffbcb5c017dc74d90bb1ca2a92827688de1..9569f0bee7234b446fb51655775cd7dcc0f9d32b 100644
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