From 9ce56221ff5907b041147f12fda367c226eba73f Mon Sep 17 00:00:00 2001
From: hyzboy <hyzboy@gmail.com>
Date: Wed, 8 Jul 2020 15:43:51 +0800
Subject: [PATCH] update DrawRect2D shaders

---
 shader/DrawRect2D.geom | 17 +++++++++++------
 shader/DrawRect2D.vert |  5 +++++
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/shader/DrawRect2D.geom b/shader/DrawRect2D.geom
index 852e958..34dcec0 100644
--- a/shader/DrawRect2D.geom
+++ b/shader/DrawRect2D.geom
@@ -3,15 +3,20 @@
 layout (points) in;
 layout (triangle_strip,max_vertices=4) out;
 
+layout(location=0) in vec4 GeometryTexCoord[];
+layout(location=0) out vec2 FragmentTexCoord;
+
 void main()
 {
-    vec2 lt=gl_in[0].gl_Position.xy;
-    vec2 rb=gl_in[0].gl_Position.zw;
+    vec2 vlt=gl_in[0].gl_Position.xy;
+    vec2 vrb=gl_in[0].gl_Position.zw;
+    vec2 tlt=GeometryTexCoord[0].xy;
+    vec2 trb=GeometryTexCoord[0].zw;
 
-    gl_Position=vec4(lt, vec2(0,1));EmitVertex();
-    gl_Position=vec4(lt.x,rb.y, vec2(0,1));EmitVertex();
-    gl_Position=vec4(rb.x,lt.y, vec2(0,1));EmitVertex();
-    gl_Position=vec4(rb, vec2(0,1));EmitVertex();
+    gl_Position=vec4(vlt,           vec2(0,1));FragmentTexCoord=tlt;                EmitVertex();
+    gl_Position=vec4(vlt.x, vrb.y,  vec2(0,1));FragmentTexCoord=vec2(tlt.x,trb.y);  EmitVertex();
+    gl_Position=vec4(vrb.x, vlt.y,  vec2(0,1));FragmentTexCoord=vec2(trb.x,tlt.y);  EmitVertex();
+    gl_Position=vec4(vrb,           vec2(0,1));FragmentTexCoord=trb;                EmitVertex();
 
     EndPrimitive();
 }
diff --git a/shader/DrawRect2D.vert b/shader/DrawRect2D.vert
index ca01486..8acacef 100644
--- a/shader/DrawRect2D.vert
+++ b/shader/DrawRect2D.vert
@@ -1,6 +1,7 @@
 #version 450 core
 
 layout(location = 0) in vec4 Vertex;
+layout(location = 1) in vec4 TexCoord;
 
 layout(binding=0) uniform WorldMatrix     // hgl/math/Math.h
 {
@@ -20,6 +21,8 @@ layout(binding=0) uniform WorldMatrix     // hgl/math/Math.h
     vec2 viewport_resolution;
 }world;
 
+layout(location=0) out vec4 GeometryTexCoord;
+
 void main()
 {
     vec4 lt=vec4(Vertex.xy,vec2(0,1));
@@ -28,5 +31,7 @@ void main()
     vec4 lt_fin=lt*world.ortho;
     vec4 rb_fin=rb*world.ortho;
 
+    GeometryTexCoord=TexCoord;
+
     gl_Position=vec4(lt_fin.xy,rb_fin.xy);
 }