[arm] 1) improve GUI framerate from 7 to 50+fps @1280x1024 by using multiple shaders, 2) fixes blending issues (colors were not normalized), 3) reduced number of glDrawElement calls to 1 per string instead of 1 per character, This can be improved again by refactoring the GUIFontTTF class to directly generate the VBO necessary for this call. A very big thanks to Phaeodaria (trac #9217) for his work on this

git-svn-id: https://xbmc.svn.sourceforge.net/svnroot/xbmc/trunk@30290 568bbfeb-2a22-0410-94d2-cc84cf5bfa90

4 files changed, 48 insertions, 0 deletions

diff --git a/system/shaders/guishader_frag0.glsl b/system/shaders/guishader_frag0.glsl
new file mode 100644
index 0000000000..478c601616
--- /dev/null
+++ b/system/shaders/guishader_frag0.glsl
@@ -0,0 +1,12 @@
+precision mediump float;
+uniform sampler2D m_samp0;
+uniform sampler2D m_samp1;
+varying vec4      m_cord0;
+varying vec4      m_cord1;
+varying vec4      m_colour;
+uniform int       m_method;
+
+void main ()
+{
+  gl_FragColor = m_colour;
+}
diff --git a/system/shaders/guishader_frag1.glsl b/system/shaders/guishader_frag1.glsl
new file mode 100644
index 0000000000..73c6f3929f
--- /dev/null
+++ b/system/shaders/guishader_frag1.glsl
@@ -0,0 +1,12 @@
+precision mediump float;
+uniform sampler2D m_samp0;
+uniform sampler2D m_samp1;
+varying vec4      m_cord0;
+varying vec4      m_cord1;
+varying vec4      m_colour;
+uniform int       m_method;
+
+void main ()
+{
+  gl_FragColor.rgba = texture2D(m_samp0, m_cord0.xy).bgra;
+}
diff --git a/system/shaders/guishader_frag2.glsl b/system/shaders/guishader_frag2.glsl
new file mode 100644
index 0000000000..095eecc11e
--- /dev/null
+++ b/system/shaders/guishader_frag2.glsl
@@ -0,0 +1,12 @@
+precision mediump float;
+uniform sampler2D m_samp0;
+uniform sampler2D m_samp1;
+varying vec4      m_cord0;
+varying vec4      m_cord1;
+varying vec4      m_colour;
+uniform int       m_method;
+
+void main ()
+{
+  gl_FragColor.rgba = (texture2D(m_samp0, m_cord0.xy) * texture2D(m_samp1, m_cord1.xy)).bgra;
+}
diff --git a/system/shaders/guishader_frag3.glsl b/system/shaders/guishader_frag3.glsl
new file mode 100644
index 0000000000..cb44cda585
--- /dev/null
+++ b/system/shaders/guishader_frag3.glsl
@@ -0,0 +1,12 @@
+precision mediump float;
+uniform sampler2D m_samp0;
+varying vec4      m_cord0;
+varying vec4      m_colour;
+
+void main ()
+{
+  gl_FragColor.r   = m_colour.r;
+  gl_FragColor.g   = m_colour.g;
+  gl_FragColor.b   = m_colour.b;
+  gl_FragColor.a   = texture2D(m_samp0, m_cord0.xy).a;
+}