Initial commit of libAgl2 using Pixelflinger2 in external/mesa3d

Somewhat functional, refer to README for details.
Need to enable Android.mk to build.
It builds libGLES_android.so, which needs to replace
 the one in system/lib/egl built by libagl.

Change-Id: Iec3aaa8f3963a4185d81955cd24019eb0c4a5850
Signed-off-by: David Li <davidxli@google.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/opengl/libagl2/src/get.cpp b/opengl/libagl2/src/get.cpp
new file mode 100644
index 0000000..13c28ce
--- /dev/null
+++ b/opengl/libagl2/src/get.cpp
@@ -0,0 +1,79 @@
+#include "gles2context.h"
+
+static char const * const gVendorString     = "Android";
+static char const * const gRendererString   = "Android PixelFlinger2 0.0";
+static char const * const gVersionString    = "OpenGL ES 2.0";
+static char const * const gExtensionsString =
+//   "GL_OES_byte_coordinates "              // OK
+//   "GL_OES_fixed_point "                   // OK
+//   "GL_OES_single_precision "              // OK
+//   "GL_OES_read_format "                   // OK
+//   "GL_OES_compressed_paletted_texture "   // OK
+//   "GL_OES_draw_texture "                  // OK
+//   "GL_OES_matrix_get "                    // OK
+//   "GL_OES_query_matrix "                  // OK
+//   //        "GL_OES_point_size_array "              // TODO
+//   //        "GL_OES_point_sprite "                  // TODO
+//   "GL_OES_EGL_image "                     // OK
+//#ifdef GL_OES_compressed_ETC1_RGB8_texture
+//   "GL_OES_compressed_ETC1_RGB8_texture "  // OK
+//#endif
+//   "GL_ARB_texture_compression "           // OK
+//   "GL_ARB_texture_non_power_of_two "      // OK
+//   "GL_ANDROID_user_clip_plane "           // OK
+//   "GL_ANDROID_vertex_buffer_object "      // OK
+//   "GL_ANDROID_generate_mipmap "           // OK
+   ""
+   ;
+
+void glGetIntegerv(GLenum pname, GLint* params)
+{
+   switch (pname) {
+   case GL_MAX_TEXTURE_SIZE :
+      *params = 4096; // limit is in precision of texcoord calculation, which uses 16.16
+      break;
+   case GL_MAX_VERTEX_ATTRIBS:
+      *params = GGL_MAXVERTEXATTRIBS;
+      break;
+   case GL_MAX_VERTEX_UNIFORM_VECTORS:
+      *params = GGL_MAXVERTEXUNIFORMVECTORS;
+      break;
+   case GL_MAX_VARYING_VECTORS:
+      *params = GGL_MAXVARYINGVECTORS;
+      break;
+   case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
+      *params = GGL_MAXCOMBINEDTEXTUREIMAGEUNITS;
+      break;
+   case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
+      *params = GGL_MAXVERTEXTEXTUREIMAGEUNITS;
+      break;
+   case GL_MAX_TEXTURE_IMAGE_UNITS:
+      *params = GGL_MAXTEXTUREIMAGEUNITS;
+      break;
+   case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
+      *params = GGL_MAXFRAGMENTUNIFORMVECTORS;
+      break;
+   case GL_ALIASED_LINE_WIDTH_RANGE:
+      *params = 1; // TODO: not implemented
+      break;
+   default:
+      LOGD("agl2: glGetIntegerv 0x%.4X", pname);
+      assert(0);
+   }
+}
+
+const GLubyte* glGetString(GLenum name)
+{
+   switch (name) {
+   case GL_VENDOR:
+      return (const GLubyte*)gVendorString;
+   case GL_RENDERER:
+      return (const GLubyte*)gRendererString;
+   case GL_VERSION:
+      return (const GLubyte*)gVersionString;
+   case GL_EXTENSIONS:
+      return (const GLubyte*)gExtensionsString;
+   }
+   assert(0); //(c, GL_INVALID_ENUM);
+   return 0;
+}