llvmpipe/u_format: add support for EXT_texture_shared_exponent + EXT_packed_float

These two are fairly unique types so add specific cases for decoding them.

Passes piglit fbo-clear-format and fbo-generatemipmap-format tests for these
two extensions.

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

src/gallium/auxiliary/util/u_format_pack.py

@@ -150,6 +150,11 @@ def is_format_pure_signed(format):
 def native_type(format):
     '''Get the native appropriate for a format.'''
 
+    if format.name == 'PIPE_FORMAT_R11G11B10_FLOAT':
+        return 'uint32_t'
+    if format.name == 'PIPE_FORMAT_R9G9B9E5_FLOAT':
+        return 'uint32_t'
+
     if format.layout == PLAIN:
         if not format.is_array():
             # For arithmetic pixel formats return the integer type that matches the whole pixel

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -249,6 +249,10 @@ llvmpipe_is_format_supported( struct pipe_screen *_screen,
    if (sample_count > 1)
       return FALSE;
 
+   if (format_desc->format == PIPE_FORMAT_R11G11B10_FLOAT ||
+       format_desc->format == PIPE_FORMAT_R9G9B9E5_FLOAT) 
+     return TRUE;
+
    if (bind & PIPE_BIND_RENDER_TARGET) {
       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS ||
           format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)

src/gallium/drivers/llvmpipe/lp_tile_soa.py

@@ -51,6 +51,12 @@ def is_format_supported(format):
 
     # FIXME: Ideally we would support any format combination here.
 
+    if format.name == 'PIPE_FORMAT_R11G11B10_FLOAT':
+        return True;
+
+    if format.name == 'PIPE_FORMAT_R9G9B9E5_FLOAT':
+        return True;
+
     if format.layout != PLAIN:
         return False
 
@@ -98,7 +104,19 @@ def generate_format_read(format, dst_channel, dst_native_type, dst_suffix):
     else:
         assert False
 
-    if format.layout == PLAIN:
+    if format.name == 'PIPE_FORMAT_R11G11B10_FLOAT':
+        print '         float tmp[3];'
+        print '         uint8_t r, g, b;'
+        print '         r11g11b10f_to_float3(*src_pixel++, tmp);'
+        for i in range(3):
+            print '         %s = tmp[%d] * 0xff;' % (names[i], i)
+    elif format.name == 'PIPE_FORMAT_R9G9B9E5_FLOAT':
+        print '         float tmp[3];'
+        print '         uint8_t r, g, b;'
+        print '         rgb9e5_to_float3(*src_pixel++, tmp);'
+        for i in range(3):
+            print '         %s = tmp[%d] * 0xff;' % (names[i], i)
+    elif format.layout == PLAIN:
         if not format.is_array():
             print '         %s pixel = *src_pixel++;' % src_native_type
             shift = 0;
@@ -235,7 +253,17 @@ def emit_tile_pixel_unswizzle_code(format, src_channel):
     print '      %s *dst_pixel = (%s *)(dst_row + x0*%u);' % (dst_native_type, dst_native_type, format.stride())
     print '      for (x = 0; x < TILE_SIZE; ++x) {'
 
-    if format.layout == PLAIN:
+    if format.name == 'PIPE_FORMAT_R11G11B10_FLOAT':
+        print '         float tmp[3];'
+        for i in range(3):
+            print '         tmp[%d] = (float)TILE_PIXEL(src, x, y, %u);' % (i, inv_swizzle[i])
+        print '         *dst_pixel++ = float3_to_r11g11b10f(tmp);'
+    elif format.name == 'PIPE_FORMAT_R9G9B9E5_FLOAT':
+        print '         float tmp[3];'
+        for i in range(3):
+            print '         tmp[%d] = (float)TILE_PIXEL(src, x, y, %u);' % (i, inv_swizzle[i])
+        print '         *dst_pixel++ = float3_to_rgb9e5(tmp);'
+    elif format.layout == PLAIN:
         if not format.is_array():
             print '         %s pixel = 0;' % dst_native_type
             shift = 0;
@@ -577,8 +605,10 @@ def main():
     print CopyRight.strip()
     print
     print '#include "pipe/p_compiler.h"'
-    print '#include "util/u_format.h"'
     print '#include "util/u_math.h"'
+    print '#include "util/u_format.h"'
+    print '#include "util/u_format_r11g11b10f.h"'
+    print '#include "util/u_format_rgb9e5.h"'
     print '#include "util/u_half.h"'
     print '#include "util/u_cpu_detect.h"'
     print '#include "lp_tile_soa.h"'