mesa: add core support for ARB_half_float_vertex.

Adds the extension to the list + support to the APIs.

also add t_draw.c support to convert for sw rast.

Signed-off-by: Dave Airlie <airlied@redhat.com>

src/mesa/main/extensions.c

@@ -56,6 +56,7 @@ static const struct {
    { OFF, "GL_ARB_fragment_shader",            F(ARB_fragment_shader) },
    { OFF, "GL_ARB_framebuffer_object",         F(ARB_framebuffer_object) },
    { OFF, "GL_ARB_half_float_pixel",           F(ARB_half_float_pixel) },
+   { OFF, "GL_ARB_half_float_vertex",          F(ARB_half_float_vertex) },
    { OFF, "GL_ARB_imaging",                    F(ARB_imaging) },
    { OFF, "GL_ARB_map_buffer_range",           F(ARB_map_buffer_range) },
    { ON,  "GL_ARB_multisample",                F(ARB_multisample) },
@@ -220,6 +221,7 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
    ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
 #endif
    ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
+   ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
    ctx->Extensions.ARB_imaging = GL_TRUE;
    ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
    ctx->Extensions.ARB_multitexture = GL_TRUE;

src/mesa/main/mtypes.h

@@ -2403,6 +2403,7 @@ struct gl_extensions
    GLboolean ARB_fragment_shader;
    GLboolean ARB_framebuffer_object;
    GLboolean ARB_half_float_pixel;
+   GLboolean ARB_half_float_vertex;
    GLboolean ARB_imaging;
    GLboolean ARB_map_buffer_range;
    GLboolean ARB_multisample;

src/mesa/main/varray.c

@@ -121,6 +121,9 @@ _mesa_VertexPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr)
       case GL_DOUBLE:
          elementSize = size * sizeof(GLdouble);
          break;
+      case GL_HALF_FLOAT:
+         elementSize = size * sizeof(GLhalfARB);
+         break;
 #if FEATURE_fixedpt
       case GL_FIXED:
          elementSize = size * sizeof(GLfixed);
@@ -174,6 +177,9 @@ _mesa_NormalPointer(GLenum type, GLsizei stride, const GLvoid *ptr )
       case GL_DOUBLE:
          elementSize = 3 * sizeof(GLdouble);
          break;
+      case GL_HALF_FLOAT:
+         elementSize = 3 * sizeof(GLhalfARB);
+         break;
 #if FEATURE_fixedpt
       case GL_FIXED:
          elementSize = 3 * sizeof(GLfixed);
@@ -250,6 +256,9 @@ _mesa_ColorPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr)
       case GL_DOUBLE:
          elementSize = size * sizeof(GLdouble);
          break;
+      case GL_HALF_FLOAT:
+         elementSize = size * sizeof(GLhalfARB);
+         break;
 #if FEATURE_fixedpt
       case GL_FIXED:
          elementSize = size * sizeof(GLfixed);
@@ -285,6 +294,9 @@ _mesa_FogCoordPointerEXT(GLenum type, GLsizei stride, const GLvoid *ptr)
       case GL_DOUBLE:
          elementSize = sizeof(GLdouble);
          break;
+      case GL_HALF_FLOAT:
+         elementSize = sizeof(GLhalfARB);
+         break;
       default:
          _mesa_error( ctx, GL_INVALID_ENUM, "glFogCoordPointer(type)" );
          return;
@@ -394,6 +406,9 @@ _mesa_SecondaryColorPointerEXT(GLint size, GLenum type,
       case GL_DOUBLE:
          elementSize = size * sizeof(GLdouble);
          break;
+      case GL_HALF_FLOAT:
+         elementSize = size * sizeof(GLhalfARB);
+         break;
       default:
          _mesa_error( ctx, GL_INVALID_ENUM, "glSecondaryColorPointer(type=%s)",
                       _mesa_lookup_enum_by_nr(type));
@@ -441,6 +456,9 @@ _mesa_TexCoordPointer(GLint size, GLenum type, GLsizei stride,
       case GL_DOUBLE:
          elementSize = size * sizeof(GLdouble);
          break;
+      case GL_HALF_FLOAT:
+         elementSize = size * sizeof(GLhalfARB);
+         break;
 #if FEATURE_fixedpt
       case GL_FIXED:
          elementSize = size * sizeof(GLfixed);
@@ -670,6 +688,9 @@ _mesa_VertexAttribPointerARB(GLuint index, GLint size, GLenum type,
       case GL_DOUBLE:
          elementSize = size * sizeof(GLdouble);
          break;
+      case GL_HALF_FLOAT:
+         elementSize = size * sizeof(GLhalfARB);
+         break;
 #if FEATURE_fixedpt
       case GL_FIXED:
          elementSize = size * sizeof(GLfixed);

src/mesa/tnl/t_draw.c

@@ -108,6 +108,22 @@ convert_bgra_to_float(const struct gl_client_array *input,
    }
 }
 
+static void
+convert_half_to_float(const struct gl_client_array *input,
+		      const GLubyte *ptr, GLfloat *fptr,
+		      GLuint count, GLuint sz)
+{
+   GLuint i, j;
+
+   for (i = 0; i < count; i++) {
+      GLhalfARB *in = (GLhalfARB *)ptr;
+
+      for (j = 0; j < sz; j++) {
+	 *fptr++ = _mesa_half_to_float(in[j]);
+      }
+      ptr += input->StrideB;
+   }
+}
 
 /* Adjust pointer to point at first requested element, convert to
  * floating point, populate VB->AttribPtr[].
@@ -155,6 +171,9 @@ static void _tnl_import_array( GLcontext *ctx,
       case GL_DOUBLE: 
 	 CONVERT(GLdouble, (GLfloat)); 
 	 break;
+      case GL_HALF_FLOAT:
+	 convert_half_to_float(input, ptr, fptr, count, sz);
+	 break;
       default:
 	 assert(0);
 	 break;