wined3d: Support CPU clear of float16 formats.

Signed-off-by: Stefan Dösinger <stefan@codeweavers.com>
Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/wined3d/surface.c

@@ -39,69 +39,6 @@ static void get_color_masks(const struct wined3d_format *format, uint32_t *masks
     masks[2] = wined3d_mask_from_size(format->blue_size) << format->blue_offset;
 }
 
-/* See also float_16_to_32() in wined3d_private.h */
-static inline unsigned short float_32_to_16(const float *in)
-{
-    int exp = 0;
-    float tmp = fabsf(*in);
-    unsigned int mantissa;
-    unsigned short ret;
-
-    /* Deal with special numbers */
-    if (*in == 0.0f)
-        return 0x0000;
-    if (isnan(*in))
-        return 0x7c01;
-    if (isinf(*in))
-        return (*in < 0.0f ? 0xfc00 : 0x7c00);
-
-    if (tmp < (float)(1u << 10))
-    {
-        do
-        {
-            tmp = tmp * 2.0f;
-            exp--;
-        } while (tmp < (float)(1u << 10));
-    }
-    else if (tmp >= (float)(1u << 11))
-    {
-        do
-        {
-            tmp /= 2.0f;
-            exp++;
-        } while (tmp >= (float)(1u << 11));
-    }
-
-    mantissa = (unsigned int)tmp;
-    if (tmp - mantissa >= 0.5f)
-        ++mantissa; /* Round to nearest, away from zero. */
-
-    exp += 10;  /* Normalize the mantissa. */
-    exp += 15;  /* Exponent is encoded with excess 15. */
-
-    if (exp > 30) /* too big */
-    {
-        ret = 0x7c00; /* INF */
-    }
-    else if (exp <= 0)
-    {
-        /* exp == 0: Non-normalized mantissa. Returns 0x0000 (=0.0) for too small numbers. */
-        while (exp <= 0)
-        {
-            mantissa = mantissa >> 1;
-            ++exp;
-        }
-        ret = mantissa & 0x3ff;
-    }
-    else
-    {
-        ret = (exp << 10) | (mantissa & 0x3ff);
-    }
-
-    ret |= ((*in < 0.0f ? 1 : 0) << 15); /* Add the sign */
-    return ret;
-}
-
 static void convert_r32_float_r16_float(const BYTE *src, BYTE *dst,
         DWORD pitch_in, DWORD pitch_out, unsigned int w, unsigned int h)
 {

dlls/wined3d/utils.c

@@ -6137,6 +6137,31 @@ void wined3d_format_convert_from_float(const struct wined3d_format *format,
         return;
     }
 
+    if ((format->flags[WINED3D_GL_RES_TYPE_TEX_2D] & WINED3DFMT_FLAG_FLOAT) && format->red_size == 16)
+    {
+        uint16_t *ret_s = ret;
+
+        switch (format->byte_count)
+        {
+            case 8:
+                ret_s[3] = float_32_to_16(&color->a);
+                ret_s[2] = float_32_to_16(&color->b);
+                /* fall through */
+            case 4:
+                ret_s[1] = float_32_to_16(&color->g);
+                /* fall through */
+            case 2:
+                ret_s[0] = float_32_to_16(&color->r);
+                break;
+
+            default:
+                ERR("Unexpected byte count %u, format %s.\n", format->byte_count, debug_d3dformat(format_id));
+                break;
+        }
+
+        return;
+    }
+
     FIXME("Conversion for format %s not implemented.\n", debug_d3dformat(format_id));
 }
 

dlls/wined3d/wined3d_private.h

@@ -354,13 +354,12 @@ static inline GLenum wined3d_gl_min_mip_filter(enum wined3d_texture_filter_type
     return minMipLookup[min_filter].mip[mip_filter];
 }
 
-/* float_16_to_32() and float_32_to_16() (see implementation in
- * surface_base.c) convert 16 bit floats in the FLOAT16 data type
- * to standard C floats and vice versa. They do not depend on the encoding
- * of the C float, so they are platform independent, but slow. On x86 and
- * other IEEE 754 compliant platforms the conversion can be accelerated by
- * bit shifting the exponent and mantissa. There are also some SSE-based
- * assembly routines out there.
+/* float_16_to_32() and float_32_to_16() convert 16 bit floats in the
+ * FLOAT16 data type to standard C floats and vice versa. They do not
+ * depend on the encoding of the C float, so they are platform independent,
+ * but slow. On x86 and other IEEE 754 compliant platforms the conversion
+ * can be accelerated by bit shifting the exponent and mantissa. There are
+ * also some SSE-based assembly routines out there.
  *
  * See GL_NV_half_float for a reference of the FLOAT16 / GL_HALF format
  */
@@ -404,6 +403,68 @@ static inline float float_24_to_32(DWORD in)
     }
 }
 
+static inline unsigned short float_32_to_16(const float *in)
+{
+    int exp = 0;
+    float tmp = fabsf(*in);
+    unsigned int mantissa;
+    unsigned short ret;
+
+    /* Deal with special numbers */
+    if (*in == 0.0f)
+        return 0x0000;
+    if (isnan(*in))
+        return 0x7c01;
+    if (isinf(*in))
+        return (*in < 0.0f ? 0xfc00 : 0x7c00);
+
+    if (tmp < (float)(1u << 10))
+    {
+        do
+        {
+            tmp = tmp * 2.0f;
+            exp--;
+        } while (tmp < (float)(1u << 10));
+    }
+    else if (tmp >= (float)(1u << 11))
+    {
+        do
+        {
+            tmp /= 2.0f;
+            exp++;
+        } while (tmp >= (float)(1u << 11));
+    }
+
+    mantissa = (unsigned int)tmp;
+    if (tmp - mantissa >= 0.5f)
+        ++mantissa; /* Round to nearest, away from zero. */
+
+    exp += 10;  /* Normalize the mantissa. */
+    exp += 15;  /* Exponent is encoded with excess 15. */
+
+    if (exp > 30) /* too big */
+    {
+        ret = 0x7c00; /* INF */
+    }
+    else if (exp <= 0)
+    {
+        /* exp == 0: Non-normalized mantissa. Returns 0x0000 (=0.0) for too small numbers. */
+        while (exp <= 0)
+        {
+            mantissa = mantissa >> 1;
+            ++exp;
+        }
+        ret = mantissa & 0x3ff;
+    }
+    else
+    {
+        ret = (exp << 10) | (mantissa & 0x3ff);
+    }
+
+    ret |= ((*in < 0.0f ? 1 : 0) << 15); /* Add the sign */
+    return ret;
+}
+
 static inline unsigned int wined3d_popcount(unsigned int x)
 {
 #if defined(__MINGW32__)