SH-2031 Fix for stall in image update -- don't use the CPU to convert a height map into a normal map -- use the GPU instead via a shader. Also, WTF glFinish?

2 files changed, 92 insertions, 0 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/normgenF.glsl b/indra/newview/app_settings/shaders/class1/deferred/normgenF.glsl
new file mode 100644
index 0000000000..879942d8fa
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/normgenF.glsl
@@ -0,0 +1,56 @@
+/** 
+ * @file normgenF.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, 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
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 gl_FragColor;
+#endif
+
+uniform sampler2D alphaMap;
+
+VARYING vec2 vary_texcoord0;
+
+uniform float stepX;
+uniform float stepY;
+uniform float norm_scale;
+
+void main()
+{
+	float alpha = texture2D(alphaMap, vary_texcoord0).a;
+
+	vec3 right = vec3(norm_scale, 0, (texture2D(alphaMap, vary_texcoord0+vec2(stepX, 0)).a-alpha)*255);
+	vec3 left = vec3(-norm_scale, 0, (texture2D(alphaMap, vary_texcoord0-vec2(stepX, 0)).a-alpha)*255);
+	vec3 up = vec3(0, -norm_scale, (texture2D(alphaMap, vary_texcoord0-vec2(0, stepY)).a-alpha)*255);
+	vec3 down = vec3(0, norm_scale, (texture2D(alphaMap, vary_texcoord0+vec2(0, stepY)).a-alpha)*255);
+	
+	vec3 norm = cross(right, down) + cross(down, left) + cross(left,up) + cross(up, right);
+	
+	norm = normalize(norm);
+	norm *= 0.5;
+	norm += 0.5;	
+	
+	gl_FragColor = vec4(norm, alpha);
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/normgenV.glsl b/indra/newview/app_settings/shaders/class1/deferred/normgenV.glsl
new file mode 100644
index 0000000000..9bceae05b7
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/normgenV.glsl
@@ -0,0 +1,36 @@
+/** 
+ * @file normgenV.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, 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
+ * $/LicenseInfo$
+ */
+ 
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec2 texcoord0;
+
+VARYING vec2 vary_fragcoord;
+VARYING vec2 vary_texcoord0;
+
+void main()
+{
+	gl_Position = vec4(position.x*2.0-1.0, position.y*2.0-1.0, -1.0, 1.0); 
+	vary_texcoord0 = texcoord0;
+}