[egl] added basic shaders and use dma to xfer buffer to the gpu

client/renderers/egl_shader_progs.h

@@ -0,0 +1,71 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#ifndef _EGL_SHADER_PROGS_H
+#define _EGL_SHADER_PROGS_H
+
+static const char egl_vertex_shader_basic[] = "\
+#version 300 es\n\
+\
+layout(location = 0) in vec3 vertexPosition_modelspace;\
+layout(location = 1) in vec2 vertexUV;\
+\
+out highp vec2 uv;\
+\
+void main()\
+{\
+  gl_Position.xyz = vertexPosition_modelspace;\
+  gl_Position.w   = 1.0;\
+\
+  uv = vertexUV;\
+}\
+";
+
+static const char egl_fragment_shader_rgba[] = "\
+#version 300 es\
+\
+in  highp vec2 uv;\
+out highp vec3 color;\
+\
+uniform sampler2D sampler;\
+ \
+void main()\
+{\
+  color = texture(sampler, uv).rgb;\
+}\
+";
+
+static const char egl_fragment_shader_bgra[] = "\
+#version 300 es\n\
+\
+in  highp vec2 uv;\
+out highp vec3 color;\
+\
+uniform sampler2D sampler;\
+\
+void main()\
+{\
+  highp vec3 tmp = texture(sampler, uv).rgb;\
+  color.r = tmp.b;\
+  color.g = tmp.g;\
+  color.b = tmp.r;\
+}\
+";
+
+#endif