From f1d892ecd1383ce2d774a2dcf92209951f79f63e Mon Sep 17 00:00:00 2001
From: Cosmic Linden <cosmic@lindenlab.com>
Date: Fri, 9 Aug 2024 17:23:43 -0700
Subject: secondlife/viewer#1883: (WIP) Alpha paint queue

---
 .../shaders/class1/interface/pbrTerrainBakeF.glsl  |  2 +-
 .../shaders/class1/interface/terrainStampF.glsl    | 44 ++++++++++++++++++++++
 .../shaders/class1/interface/terrainStampV.glsl    | 39 +++++++++++++++++++
 3 files changed, 84 insertions(+), 1 deletion(-)
 create mode 100644 indra/newview/app_settings/shaders/class1/interface/terrainStampF.glsl
 create mode 100644 indra/newview/app_settings/shaders/class1/interface/terrainStampV.glsl

(limited to 'indra/newview/app_settings/shaders/class1/interface')

diff --git a/indra/newview/app_settings/shaders/class1/interface/pbrTerrainBakeF.glsl b/indra/newview/app_settings/shaders/class1/interface/pbrTerrainBakeF.glsl
index cf20653a0f..a79a56d725 100644
--- a/indra/newview/app_settings/shaders/class1/interface/pbrTerrainBakeF.glsl
+++ b/indra/newview/app_settings/shaders/class1/interface/pbrTerrainBakeF.glsl
@@ -1,5 +1,5 @@
 /**
- * @file terrainBakeF.glsl
+ * @file pbrTerrainBakeF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
diff --git a/indra/newview/app_settings/shaders/class1/interface/terrainStampF.glsl b/indra/newview/app_settings/shaders/class1/interface/terrainStampF.glsl
new file mode 100644
index 0000000000..e79e9010e6
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/interface/terrainStampF.glsl
@@ -0,0 +1,44 @@
+/**
+ * @file terrainStampF.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+out vec4 frag_color;
+
+// Paint texture to stamp into the "paintmap"
+uniform sampler2D diffuseMap;
+
+in vec2 vary_texcoord0;
+
+void main()
+{
+    vec4 col = texture(diffuseMap, vary_texcoord0);
+    if (col.a <= 0.0f)
+    {
+        discard;
+    }
+
+    frag_color = max(col, vec4(0));
+}
diff --git a/indra/newview/app_settings/shaders/class1/interface/terrainStampV.glsl b/indra/newview/app_settings/shaders/class1/interface/terrainStampV.glsl
new file mode 100644
index 0000000000..294fa6be26
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/interface/terrainStampV.glsl
@@ -0,0 +1,39 @@
+/**
+ * @file terrainStampV.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+uniform mat4 modelview_projection_matrix;
+uniform vec2 terrain_stamp_scale;
+
+in vec3 position;
+
+out vec2 vary_texcoord0;
+
+void main()
+{
+    gl_Position = modelview_projection_matrix * vec4(position, 1.0);
+    // Positions without transforms are treated as UVs for the purpose of this shader.
+    vary_texcoord0.xy = terrain_stamp_scale * position.xy;
+}
+
-- 
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