Added an OpenGL ES 2.0 renderer, contributed by itsnotabigtruck

This compiles, but it untested.

src/render/opengles2/SDL_shaders_gles2.h

@@ -0,0 +1,66 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 2010 itsnotabigtruck.
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "SDL_config.h"
+
+#if SDL_VIDEO_RENDER_OGL_ES2
+
+#ifndef SDL_shaderdata_h_
+#define SDL_shaderdata_h_
+
+#ifdef __IPHONEOS__
+#include <OpenGLES/ES2/gl.h>
+#else
+#include <GLES2/gl2.h>
+#endif
+
+typedef struct GLES2_ShaderInstance
+{
+    GLenum type;
+    GLenum format;
+    int length;
+    const void *data;
+} GLES2_ShaderInstance;
+
+typedef struct GLES2_Shader
+{
+    int instance_count;
+    const GLES2_ShaderInstance *instances[4];
+} GLES2_Shader;
+
+typedef enum
+{
+    GLES2_SHADER_VERTEX_DEFAULT,
+    GLES2_SHADER_FRAGMENT_SOLID_SRC,
+    GLES2_SHADER_FRAGMENT_TEXTURE_SRC
+} GLES2_ShaderType;
+
+#define GLES2_SOURCE_SHADER (GLenum)-1
+
+const GLES2_Shader *GLES2_GetShader(GLES2_ShaderType type, SDL_BlendMode blendMode);
+
+#endif /* SDL_shaderdata_h_ */
+
+#endif /* SDL_VIDEO_RENDER_OGL_ES2 */
+
+/* vi: set ts=4 sw=4 expandtab: */