From 2b825c477157c028550b94d3333253182968141a Mon Sep 17 00:00:00 2001
From: Elias Naur <mail@eliasnaur.com>
Date: Sun, 1 Oct 2023 21:12:54 +0000
Subject: [PATCH] gio: make blit and cover shaders available for FBO rendering

Signed-off-by: Elias Naur <mail@eliasnaur.com>
---
 README.md                              |   4 ++--
 gio/blit.vert                          |   8 +++++++-
 gio/cover.vert                         |   8 +++++++-
 gio/shaders.go                         |   8 ++++----
 gio/zblit.vert.0.dxbc                  | Bin 1312 -> 1348 bytes
 gio/zblit.vert.0.glsl100es             |  22 ++++++++++++++++------
 gio/zblit.vert.0.glsl150               |  22 ++++++++++++++++------
 gio/zblit.vert.0.metallibios           | Bin 3268 -> 3300 bytes
 gio/zblit.vert.0.metallibiossimulator  | Bin 3726 -> 3758 bytes
 gio/zblit.vert.0.metallibmacos         | Bin 3300 -> 3316 bytes
 gio/zblit.vert.0.spirv                 | Bin 1784 -> 2072 bytes
 gio/zcover.vert.0.glsl100es            |  22 ++++++++++++++++------
 gio/zcover.vert.0.glsl150              |  22 ++++++++++++++++------
 gio/zcover.vert.0.metallibios          | Bin 3156 -> 3220 bytes
 gio/zcover.vert.0.metallibiossimulator | Bin 3598 -> 3662 bytes
 gio/zcover.vert.0.metallibmacos        | Bin 3204 -> 3252 bytes
 gio/zcover.vert.0.spirv                | Bin 1972 -> 2260 bytes
 17 files changed, 84 insertions(+), 32 deletions(-)

diff --git a/README.md b/README.md
index 4ea4867..67f7456 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # GPU programs for the Gio project
 
-This repository contains the source code for the [Gio](https://gioui.org)
-project. It also contains the generators and dereived versions for use with the
+This repository contains source code for the [Gio](https://gioui.org)
+project. It also contains the generators and derived versions for use with the
 GPU APIs supported by Gio.
 
 # Generating CPU fallbacks
diff --git a/gio/blit.vert b/gio/blit.vert
index 2009ced..adb5971 100644
--- a/gio/blit.vert
+++ b/gio/blit.vert
@@ -13,6 +13,8 @@ layout(push_constant) uniform Block {
 	vec4 uvTransformR1;
 	vec4 uvTransformR2;
 	float opacity;
+	// fbo is set if blitting to a FBO, otherwise the window.
+	float fbo;
 } _block;
 
 layout(location = 0) in vec2 pos;
@@ -24,7 +26,11 @@ layout(location = 1) out float opacity;
 
 void main() {
 	vec2 p = pos*_block.transform.xy + _block.transform.zw;
-	gl_Position = vec4(transform3x2(windowTransform, vec3(p, 0)), 1);
+	if (_block.fbo != 0.0) {
+		gl_Position = vec4(transform3x2(fboTransform, vec3(p, 0)), 1);
+	} else {
+		gl_Position = vec4(transform3x2(windowTransform, vec3(p, 0)), 1);
+	}
 	vUV = transform3x2(m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz), vec3(uv,1)).xy;
 	opacity = _block.opacity;
 }
diff --git a/gio/cover.vert b/gio/cover.vert
index 02fae50..dddfd05 100644
--- a/gio/cover.vert
+++ b/gio/cover.vert
@@ -13,6 +13,8 @@ layout(push_constant) uniform Block {
 	vec4 uvCoverTransform;
 	vec4 uvTransformR1;
 	vec4 uvTransformR2;
+	// fbo is set if blitting to a FBO, otherwise the window.
+	float fbo;
 } _block;
 
 layout(location = 0) in vec2 pos;
@@ -24,7 +26,11 @@ layout(location = 1) out vec2 vUV;
 
 void main() {
 	vec2 p = vec2(pos*_block.transform.xy + _block.transform.zw);
-    gl_Position = vec4(transform3x2(windowTransform, vec3(p, 0)), 1);
+	if (_block.fbo != 0.0) {
+		gl_Position = vec4(transform3x2(fboTransform, vec3(p, 0)), 1);
+	} else {
+		gl_Position = vec4(transform3x2(windowTransform, vec3(p, 0)), 1);
+	}
 	vUV = transform3x2(m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz), vec3(uv,1)).xy;
 	vec3 uv3 = vec3(uv, 1.0);
 	vCoverUV = (uv3*vec3(_block.uvCoverTransform.xy, 1.0)+vec3(_block.uvCoverTransform.zw, 0.0)).xy;
diff --git a/gio/shaders.go b/gio/shaders.go
index 282e4a0..61eb04c 100644
--- a/gio/shaders.go
+++ b/gio/shaders.go
@@ -79,8 +79,8 @@ var (
 		Name:   "blit.vert",
 		Inputs: []shader.InputLocation{{Name: "pos", Location: 0, Semantic: "TEXCOORD", SemanticIndex: 0, Type: 0x0, Size: 2}, {Name: "uv", Location: 1, Semantic: "TEXCOORD", SemanticIndex: 1, Type: 0x0, Size: 2}},
 		Uniforms: shader.UniformsReflection{
-			Locations: []shader.UniformLocation{{Name: "_block.transform", Type: 0x0, Size: 4, Offset: 0}, {Name: "_block.uvTransformR1", Type: 0x0, Size: 4, Offset: 16}, {Name: "_block.uvTransformR2", Type: 0x0, Size: 4, Offset: 32}, {Name: "_block.opacity", Type: 0x0, Size: 1, Offset: 48}},
-			Size:      52,
+			Locations: []shader.UniformLocation{{Name: "_block.transform", Type: 0x0, Size: 4, Offset: 0}, {Name: "_block.uvTransformR1", Type: 0x0, Size: 4, Offset: 16}, {Name: "_block.uvTransformR2", Type: 0x0, Size: 4, Offset: 32}, {Name: "_block.opacity", Type: 0x0, Size: 1, Offset: 48}, {Name: "_block.fbo", Type: 0x0, Size: 1, Offset: 52}},
+			Size:      56,
 		},
 	}
 	//go:embed zblit.vert.0.spirv
@@ -209,8 +209,8 @@ var (
 		Name:   "cover.vert",
 		Inputs: []shader.InputLocation{{Name: "pos", Location: 0, Semantic: "TEXCOORD", SemanticIndex: 0, Type: 0x0, Size: 2}, {Name: "uv", Location: 1, Semantic: "TEXCOORD", SemanticIndex: 1, Type: 0x0, Size: 2}},
 		Uniforms: shader.UniformsReflection{
-			Locations: []shader.UniformLocation{{Name: "_block.transform", Type: 0x0, Size: 4, Offset: 0}, {Name: "_block.uvCoverTransform", Type: 0x0, Size: 4, Offset: 16}, {Name: "_block.uvTransformR1", Type: 0x0, Size: 4, Offset: 32}, {Name: "_block.uvTransformR2", Type: 0x0, Size: 4, Offset: 48}},
-			Size:      64,
+			Locations: []shader.UniformLocation{{Name: "_block.transform", Type: 0x0, Size: 4, Offset: 0}, {Name: "_block.uvCoverTransform", Type: 0x0, Size: 4, Offset: 16}, {Name: "_block.uvTransformR1", Type: 0x0, Size: 4, Offset: 32}, {Name: "_block.uvTransformR2", Type: 0x0, Size: 4, Offset: 48}, {Name: "_block.fbo", Type: 0x0, Size: 1, Offset: 64}},
+			Size:      68,
 		},
 	}
 	//go:embed zcover.vert.0.spirv
diff --git a/gio/zblit.vert.0.dxbc b/gio/zblit.vert.0.dxbc
index 4bf7b8b5ea0fd437fc1830a119929cac21670aa1..e447446ec281a78818723a4c9ca8fa41d3dd8f39 100644
GIT binary patch
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delta 222
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diff --git a/gio/zblit.vert.0.glsl100es b/gio/zblit.vert.0.glsl100es
index 908f4e5..8e9a61e 100644
--- a/gio/zblit.vert.0.glsl100es
+++ b/gio/zblit.vert.0.glsl100es
@@ -12,6 +12,7 @@ struct Block
     vec4 uvTransformR1;
     vec4 uvTransformR2;
     float opacity;
+    float fbo;
 };
 
 uniform Block _block;
@@ -29,12 +30,21 @@ vec3 transform3x2(m3x2 t, vec3 v)
 void main()
 {
     vec2 p = (pos * _block.transform.xy) + _block.transform.zw;
-    m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
-    vec3 param_1 = vec3(p, 0.0);
-    gl_Position = vec4(transform3x2(param, param_1), 1.0);
-    m3x2 param_2 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
-    vec3 param_3 = vec3(uv, 1.0);
-    vUV = transform3x2(param_2, param_3).xy;
+    if (_block.fbo != 0.0)
+    {
+        m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0));
+        vec3 param_1 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param, param_1), 1.0);
+    }
+    else
+    {
+        m3x2 param_2 = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
+        vec3 param_3 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param_2, param_3), 1.0);
+    }
+    m3x2 param_4 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
+    vec3 param_5 = vec3(uv, 1.0);
+    vUV = transform3x2(param_4, param_5).xy;
     opacity = _block.opacity;
 }
 
diff --git a/gio/zblit.vert.0.glsl150 b/gio/zblit.vert.0.glsl150
index ffb2070..4d4d33d 100644
--- a/gio/zblit.vert.0.glsl150
+++ b/gio/zblit.vert.0.glsl150
@@ -12,6 +12,7 @@ struct Block
     vec4 uvTransformR1;
     vec4 uvTransformR2;
     float opacity;
+    float fbo;
 };
 
 uniform Block _block;
@@ -29,12 +30,21 @@ vec3 transform3x2(m3x2 t, vec3 v)
 void main()
 {
     vec2 p = (pos * _block.transform.xy) + _block.transform.zw;
-    m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
-    vec3 param_1 = vec3(p, 0.0);
-    gl_Position = vec4(transform3x2(param, param_1), 1.0);
-    m3x2 param_2 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
-    vec3 param_3 = vec3(uv, 1.0);
-    vUV = transform3x2(param_2, param_3).xy;
+    if (_block.fbo != 0.0)
+    {
+        m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0));
+        vec3 param_1 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param, param_1), 1.0);
+    }
+    else
+    {
+        m3x2 param_2 = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
+        vec3 param_3 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param_2, param_3), 1.0);
+    }
+    m3x2 param_4 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
+    vec3 param_5 = vec3(uv, 1.0);
+    vUV = transform3x2(param_4, param_5).xy;
     opacity = _block.opacity;
 }
 
diff --git a/gio/zblit.vert.0.metallibios b/gio/zblit.vert.0.metallibios
index 348facefa60c6a091e0d532f4efb58477f68f9e4..e0c58f5922d6055db6a2f78da55748767dfc80e8 100644
GIT binary patch
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diff --git a/gio/zblit.vert.0.metallibiossimulator b/gio/zblit.vert.0.metallibiossimulator
index f0edc06afe84a4649558aacf19631a91140bde8c..f5d5d335a4ef084483aee9bf3ee530c69c234582 100644
GIT binary patch
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diff --git a/gio/zblit.vert.0.metallibmacos b/gio/zblit.vert.0.metallibmacos
index 079e24486360b58f2eefd199ce0c46f675528d73..f74230739dd7ac9da2fe14da15b55cdf8923ddb1 100644
GIT binary patch
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diff --git a/gio/zblit.vert.0.spirv b/gio/zblit.vert.0.spirv
index e35fd2d18379e7fca9bc0e0909c9cfa8a595265e..03a978c94e14db2a643617dc6375db04b40c3a33 100644
GIT binary patch
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diff --git a/gio/zcover.vert.0.glsl100es b/gio/zcover.vert.0.glsl100es
index 423ca60..4e6d142 100644
--- a/gio/zcover.vert.0.glsl100es
+++ b/gio/zcover.vert.0.glsl100es
@@ -12,6 +12,7 @@ struct Block
     vec4 uvCoverTransform;
     vec4 uvTransformR1;
     vec4 uvTransformR2;
+    float fbo;
 };
 
 uniform Block _block;
@@ -29,12 +30,21 @@ vec3 transform3x2(m3x2 t, vec3 v)
 void main()
 {
     vec2 p = vec2((pos * _block.transform.xy) + _block.transform.zw);
-    m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
-    vec3 param_1 = vec3(p, 0.0);
-    gl_Position = vec4(transform3x2(param, param_1), 1.0);
-    m3x2 param_2 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
-    vec3 param_3 = vec3(uv, 1.0);
-    vUV = transform3x2(param_2, param_3).xy;
+    if (_block.fbo != 0.0)
+    {
+        m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0));
+        vec3 param_1 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param, param_1), 1.0);
+    }
+    else
+    {
+        m3x2 param_2 = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
+        vec3 param_3 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param_2, param_3), 1.0);
+    }
+    m3x2 param_4 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
+    vec3 param_5 = vec3(uv, 1.0);
+    vUV = transform3x2(param_4, param_5).xy;
     vec3 uv3 = vec3(uv, 1.0);
     vCoverUV = ((uv3 * vec3(_block.uvCoverTransform.xy, 1.0)) + vec3(_block.uvCoverTransform.zw, 0.0)).xy;
 }
diff --git a/gio/zcover.vert.0.glsl150 b/gio/zcover.vert.0.glsl150
index a5005d6..f4a0449 100644
--- a/gio/zcover.vert.0.glsl150
+++ b/gio/zcover.vert.0.glsl150
@@ -12,6 +12,7 @@ struct Block
     vec4 uvCoverTransform;
     vec4 uvTransformR1;
     vec4 uvTransformR2;
+    float fbo;
 };
 
 uniform Block _block;
@@ -29,12 +30,21 @@ vec3 transform3x2(m3x2 t, vec3 v)
 void main()
 {
     vec2 p = vec2((pos * _block.transform.xy) + _block.transform.zw);
-    m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
-    vec3 param_1 = vec3(p, 0.0);
-    gl_Position = vec4(transform3x2(param, param_1), 1.0);
-    m3x2 param_2 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
-    vec3 param_3 = vec3(uv, 1.0);
-    vUV = transform3x2(param_2, param_3).xy;
+    if (_block.fbo != 0.0)
+    {
+        m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0));
+        vec3 param_1 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param, param_1), 1.0);
+    }
+    else
+    {
+        m3x2 param_2 = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
+        vec3 param_3 = vec3(p, 0.0);
+        gl_Position = vec4(transform3x2(param_2, param_3), 1.0);
+    }
+    m3x2 param_4 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
+    vec3 param_5 = vec3(uv, 1.0);
+    vUV = transform3x2(param_4, param_5).xy;
     vec3 uv3 = vec3(uv, 1.0);
     vCoverUV = ((uv3 * vec3(_block.uvCoverTransform.xy, 1.0)) + vec3(_block.uvCoverTransform.zw, 0.0)).xy;
 }
diff --git a/gio/zcover.vert.0.metallibios b/gio/zcover.vert.0.metallibios
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diff --git a/gio/zcover.vert.0.metallibiossimulator b/gio/zcover.vert.0.metallibiossimulator
index 96470cd1792febe266536b3780c8241b0b51c805..de076d4fca82e171e1fe014c001cdea5eea6f26a 100644
GIT binary patch
delta 1066
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delta 1088
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MX0|fS@bV1Be|}MP;Q#;t

diff --git a/gio/zcover.vert.0.metallibmacos b/gio/zcover.vert.0.metallibmacos
index 629e82b51c02bdc4d5a27c5009c5f496a9c8603b..a4a6a233ff9e6c1cb5c94d81ca6bf9c52a1e860b 100644
GIT binary patch
delta 1435
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z%6NpXB2d&-7z$CIMX_cq<zWX14%pNw2`LIijEYl&TQJ#faZ7fR^FPji{_lKW{+wS&
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delta 1396
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i@&sdpg*-2qfCidU{MiE%z@JT&@g75!1teUO|Jh&JQzRDv

diff --git a/gio/zcover.vert.0.spirv b/gio/zcover.vert.0.spirv
index f9af8ab1b91135d3ff35f547abd8487c5a5a55e2..30662b100616a74374624fb665c7933407a2d81f 100644
GIT binary patch
literal 2260
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literal 1972
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-- 
2.45.2