Mesa (arb_half_float_vertex): r300: half float support

[Dave Airlie]

Module: Mesa
Branch: arb_half_float_vertex
Commit: d82b8038fda47e825cbd093b3ae198a85a163b25
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d82b8038fda47e825cbd093b3ae198a85a163b25

Author: Dave Airlie <airlied at redhat.com>
Date:   Sat Jan 23 07:38:06 2010 +1000

r300: half float support

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

---

 src/mesa/drivers/dri/r300/r300_context.c |    1 +
 src/mesa/drivers/dri/r300/r300_draw.c    |   14 ++++++++++++++
 src/mesa/drivers/dri/r300/r300_reg.h     |    3 +++
 3 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/r300/r300_context.c b/src/mesa/drivers/dri/r300/r300_context.c
index bb0e6db..24c51d4 100644
--- a/src/mesa/drivers/dri/r300/r300_context.c
+++ b/src/mesa/drivers/dri/r300/r300_context.c
@@ -97,6 +97,7 @@ static const struct dri_extension card_extensions[] = {
   /* *INDENT-OFF* */
   {"GL_ARB_depth_texture",		NULL},
   {"GL_ARB_fragment_program",		NULL},
+  {"GL_ARB_half_float_vertex",		NULL},
   {"GL_ARB_occlusion_query",		GL_ARB_occlusion_query_functions},
   {"GL_ARB_multitexture",		NULL},
   {"GL_ARB_point_parameters",		GL_ARB_point_parameters_functions},
diff --git a/src/mesa/drivers/dri/r300/r300_draw.c b/src/mesa/drivers/dri/r300/r300_draw.c
index 3dcd986..2219821 100644
--- a/src/mesa/drivers/dri/r300/r300_draw.c
+++ b/src/mesa/drivers/dri/r300/r300_draw.c
@@ -56,6 +56,8 @@ static int getTypeSize(GLenum type)
 	switch (type) {
 		case GL_DOUBLE:
 			return sizeof(GLdouble);
+		case GL_HALF_FLOAT:
+			return sizeof(GLhalfARB);
 		case GL_FLOAT:
 			return sizeof(GLfloat);
 		case GL_INT:
@@ -385,6 +387,18 @@ static void r300TranslateAttrib(GLcontext *ctx, GLuint attr, int count, const st
 			r300_attr._signed = 0;
 			r300_attr.normalize = 0;
 			break;
+		case GL_HALF_FLOAT:
+			switch (input->Size) {
+				case 1:
+				case 2:
+					r300_attr.data_type = R300_DATA_TYPE_FLT16_2;
+					break;
+				case 3:
+				case 4:
+					r300_attr.data_type = R300_DATA_TYPE_FLT16_4;
+					break;
+			}
+			break;
 		case GL_SHORT:
 			r300_attr._signed = 1;
 			r300_attr.normalize = input->Normalized;
diff --git a/src/mesa/drivers/dri/r300/r300_reg.h b/src/mesa/drivers/dri/r300/r300_reg.h
index ea684e7..d18ebab 100644
--- a/src/mesa/drivers/dri/r300/r300_reg.h
+++ b/src/mesa/drivers/dri/r300/r300_reg.h
@@ -230,6 +230,9 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 #       define R300_DATA_TYPE_SHORT_4                   7
 #       define R300_DATA_TYPE_VECTOR_3_TTT              8
 #       define R300_DATA_TYPE_VECTOR_3_EET              9
+#	define R300_DATA_TYPE_FLT16_2			11
+#	define R300_DATA_TYPE_FLT16_4			12
+
 #       define R300_SKIP_DWORDS_SHIFT                   4
 #       define R300_DST_VEC_LOC_SHIFT                   8
 #       define R300_LAST_VEC                            (1 << 13)