Finish GLES{1,2} support for client side matrix stacks

Adds glFrustum wrappers (GLES only accepts floats not doubles, and GLES2
needs to use our internal cogl_wrap_glFrustumf)

Adds GL_TEXTURE_MATRIX getter code in cogl_wrap_glGetFloatv

Adds a GL_TEXTURE_MATRIX define for GLES2

common/cogl-current-matrix.c

@@ -33,6 +33,19 @@
 #include "cogl-current-matrix.h"
 #include "cogl-matrix-stack.h"
 
+#ifdef HAVE_COGL_GLES2
+#include "cogl-gles2-wrapper.h"
+
+#define glFrustum(L,R,B,T,N,F) \
+            cogl_wrap_glFrustumf((GLfloat)L, (GLfloat)R, (GLfloat)B, \
+                                 (GLfloat)T, (GLfloat)N, (GLfloat)F)
+#elif defined (HAVE_COGL_GLES)
+
+#define glFrustum(L,R,B,T,N,F) \
+            glFrustumf((GLfloat)L, (GLfloat)R, (GLfloat)B, \
+                       (GLfloat)T, (GLfloat)N, (GLfloat)F)
+#endif
+
 #include <string.h>
 #include <math.h>
 

gles/cogl-gles2-wrapper.c

@@ -1505,6 +1505,8 @@ cogl_wrap_glGetIntegerv (GLenum pname, GLint *params)
 void
 cogl_wrap_glGetFloatv (GLenum pname, GLfloat *params)
 {
+  CoglGles2WrapperTextureUnit *texture_unit;
+
   _COGL_GET_GLES2_WRAPPER (w, NO_RETVAL);
 
   switch (pname)
@@ -1519,6 +1521,14 @@ cogl_wrap_glGetFloatv (GLenum pname, GLfloat *params)
               sizeof (GLfloat) * 16);
       break;
 
+    case GL_TEXTURE_MATRIX:
+      texture_unit = w->texture_units + w->active_texture_unit;
+      memcpy (params,
+              texture_unit->texture_stack
+               + texture_unit->texture_stack_pos * 16,
+              sizeof (GLfloat) * 16);
+      break;
+
     case GL_VIEWPORT:
       glGetFloatv (GL_VIEWPORT, params);
       break;

gles/cogl-gles2-wrapper.h

@@ -255,6 +255,7 @@ struct _CoglGles2WrapperShader
 
 #define GL_MODELVIEW_MATRIX    0x0BA6
 #define GL_PROJECTION_MATRIX   0x0BA7
+#define GL_TEXTURE_MATRIX      0x0BA8
 
 #define GL_GENERATE_MIPMAP     0x8191