mesa/es: Add OpenGL ES overlay.

This is primitive support for OpenGL ES.  It uses a subset of mesa
sources to build libesXgallium.a and libesXapi.a, where X is 1 for
OpenGL ES 1.x, 2 for OpenGL ES 2.x.  The static libraries serve the same
purpose as libmesagallium.a and libglapi.a do for OpenGL.

This is based on the work of opengl-es branch.

Signed-off-by: Chia-I Wu <[email protected]>

1 files changed, 37 insertions, 0 deletions

diff --git a/src/mesa/es/main/es_fbo.c b/src/mesa/es/main/es_fbo.c
new file mode 100644
index 00000000000..545c46ca99c
--- /dev/null
+++ b/src/mesa/es/main/es_fbo.c
@@ -0,0 +1,37 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ **************************************************************************/
+
+
+#include "GLES2/gl2.h"
+#include "GLES2/gl2ext.h"
+
+
+extern void GL_APIENTRY _es_RenderbufferStorage(GLenum target, GLenum internalFormat, GLsizei width, GLsizei height);
+
+extern void GL_APIENTRY _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat, GLsizei width, GLsizei height);
+
+
+void GL_APIENTRY
+_es_RenderbufferStorage(GLenum target, GLenum internalFormat,
+                        GLsizei width, GLsizei height)
+{
+   switch (internalFormat) {
+   case GL_RGBA4:
+   case GL_RGB5_A1:
+   case GL_RGB565:
+      internalFormat = GL_RGBA;
+      break;
+   case GL_STENCIL_INDEX1_OES:
+   case GL_STENCIL_INDEX4_OES:
+   case GL_STENCIL_INDEX8:
+      internalFormat = GL_STENCIL_INDEX;
+      break;
+   default:
+      ; /* no op */
+   }
+   _mesa_RenderbufferStorageEXT(target, internalFormat, width, height);
+}