MAINT-8838 render a sun disc if the texture(s) are provided by WL settings (default is no sun disc and just haze)

Refactor sky texture optimization to retain building the cubemap used by shiny.

1 files changed, 55 insertions, 0 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunDiscF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunDiscF.glsl
new file mode 100644
index 0000000000..d2e3be2720
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunDiscF.glsl
@@ -0,0 +1,55 @@
+/** 
+ * @file sunDiscF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, 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
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+vec3 fullbrightAtmosTransport(vec3 light);
+vec3 fullbrightScaleSoftClip(vec3 light);
+
+uniform sampler2D diffuseMap;
+uniform sampler2D altDiffuseMap;
+uniform float blend_factor; // interp factor between sunDisc A/B
+VARYING vec2 vary_texcoord0;
+
+void main() 
+{
+	vec4 sunDiscA = texture2D(diffuseMap, vary_texcoord0.xy);
+	vec4 sunDiscB = texture2D(altDiffuseMap, vary_texcoord0.xy);
+    vec4 c     = mix(sunDiscB, sunDiscA, blend_factor);
+
+	c.rgb = pow(c.rgb, vec3(0.7f));
+	c.rgb = fullbrightAtmosTransport(c.rgb);
+    c.rgb = fullbrightScaleSoftClip(c.rgb);
+	frag_color = c;
+}
+