d3dx9: Implement D3DXFloat16to32Array and D3DXFloat32to16Array.
Misha Koshelev
misha680 at gmail.com
Tue Feb 8 10:52:06 CST 2011
On Tue, Feb 8, 2011 at 12:02 AM, Dmitry Timoshkov
<dmitry at codeweavers.com> wrote:
> Misha Koshelev <misha680 at gmail.com> wrote:
>
>> +static inline unsigned short float_32_to_16(const float *in)
>
>> +static inline float float_16_to_32(const unsigned short *in) {
>
> Is there a reason that you pass a pointer to the helper instead of
> a value? Also placing a brace on its own line would follow the style
> of other functions.
>
> --
> Dmitry.
>
Fair enough. The latter is a Java-ism.
How about this one?
Thanks
Misha
-------------- next part --------------
From 7e9c3bfa71c8463a3b87cfc0ffa1707bed54e320 Mon Sep 17 00:00:00 2001
From: Misha Koshelev <misha680 at gmail.com>
Date: Tue, 8 Feb 2011 11:50:02 -0500
Subject: d3dx9: Implement D3DXFloat32To16Array and D3DXFloat16To32Array.
To: wine-patches <wine-patches at winehq.org>
Reply-To: wine-devel <wine-devel at winehq.org>
---
dlls/d3dx9_36/d3dx9_36.spec | 4 +-
dlls/d3dx9_36/math.c | 111 +++++++++++++++++++++++++++++++++++++++++++
dlls/d3dx9_36/tests/math.c | 50 +++++++++++++++++++
include/d3dx9math.h | 18 +++++++
include/d3dx9math.inl | 31 ++++++++++++
5 files changed, 212 insertions(+), 2 deletions(-)
diff --git a/dlls/d3dx9_36/d3dx9_36.spec b/dlls/d3dx9_36/d3dx9_36.spec
index cbb6d20..55fe0cb 100644
--- a/dlls/d3dx9_36/d3dx9_36.spec
+++ b/dlls/d3dx9_36/d3dx9_36.spec
@@ -130,8 +130,8 @@
@ stub D3DXFillVolumeTextureTX
@ stdcall D3DXFilterTexture(ptr ptr long long)
@ stdcall D3DXFindShaderComment(ptr long ptr ptr)
-@ stub D3DXFloat16To32Array
-@ stub D3DXFloat32To16Array
+@ stdcall D3DXFloat16To32Array(ptr ptr long)
+@ stdcall D3DXFloat32To16Array(ptr ptr long)
@ stub D3DXFrameAppendChild
@ stub D3DXFrameCalculateBoundingSphere
@ stub D3DXFrameDestroy
diff --git a/dlls/d3dx9_36/math.c b/dlls/d3dx9_36/math.c
index fdb5f92..467b8b7 100644
--- a/dlls/d3dx9_36/math.c
+++ b/dlls/d3dx9_36/math.c
@@ -1769,3 +1769,114 @@ D3DXVECTOR4* WINAPI D3DXVec4TransformArray(D3DXVECTOR4* out, UINT outstride, CON
}
return out;
}
+
+static inline unsigned short float_32_to_16(const float in)
+{
+ int exp = 0;
+ float tmp = fabs(in);
+ int sign = signbit(in);
+ unsigned int mantissa;
+ unsigned short ret;
+
+ /* Deal with special numbers */
+ switch (fpclassify(in))
+ {
+ case FP_ZERO:
+ return (sign ? 0x8000 : 0x0000);
+
+ case FP_INFINITE:
+ return (sign ? 0xffff : 0x7c00);
+
+ case FP_NAN:
+ return (sign ? 0xffff : 0x7fff);
+ }
+ if (fabs(in) > 65520) return (sign ? 0xfc00 : 0x7c00);
+
+ if (tmp < powf(2, 10))
+ {
+ do
+ {
+ tmp = tmp * 2.0f;
+ exp--;
+ } while (tmp < powf(2, 10));
+ }
+ else if (tmp >= powf(2, 11))
+ {
+ do
+ {
+ tmp /= 2.0f;
+ exp++;
+ } while (tmp >= powf(2, 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 > 31)
+ {
+ /* too big */
+ ret = 0x7fff; /* 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 |= ((sign ? 1 : 0) << 15); /* Add the sign */
+ return ret;
+}
+
+D3DXFLOAT16 *WINAPI D3DXFloat32To16Array(D3DXFLOAT16 *pout, CONST FLOAT *pin, UINT n)
+{
+ unsigned int i;
+
+ for (i = 0; i < n; ++i)
+ {
+ pout[i].value = float_32_to_16(pin[i]);
+ }
+
+ return pout;
+}
+
+static inline float float_16_to_32(const unsigned short in)
+{
+ const unsigned short s = (in & 0x8000);
+ const unsigned short e = (in & 0x7C00) >> 10;
+ const unsigned short m = in & 0x3FF;
+ const float sgn = (s ? -1.0f : 1.0f);
+
+ if (e == 0)
+ {
+ if (m == 0) return sgn * 0.0f; /* +0.0 or -0.0 */
+ else return sgn * powf(2, -14.0f) * ((float)m / 1024.0f);
+ }
+ else
+ {
+ return sgn * powf(2, (float)e - 15.0f) * (1.0f + ((float)m / 1024.0f));
+ }
+}
+
+FLOAT *WINAPI D3DXFloat16To32Array(FLOAT *pout, CONST D3DXFLOAT16 *pin, UINT n)
+{
+ unsigned int i;
+
+ for (i = 0; i < n; ++i)
+ {
+ pout[i] = float_16_to_32(pin[i].value);
+ }
+
+ return pout;
+}
diff --git a/dlls/d3dx9_36/tests/math.c b/dlls/d3dx9_36/tests/math.c
index e455a96..34d16a9 100644
--- a/dlls/d3dx9_36/tests/math.c
+++ b/dlls/d3dx9_36/tests/math.c
@@ -21,6 +21,7 @@
#include "wine/test.h"
#include "d3dx9.h"
+#include <math.h>
#define ARRAY_SIZE 5
@@ -2216,6 +2217,54 @@ static void test_D3DXVec_Array(void)
compare_planes(exp_plane, out_plane);
}
+static void test_D3DXFloat_Array(void)
+{
+ unsigned int i;
+ void *out = NULL;
+ D3DXFLOAT16 half_res[22];
+ FLOAT single[22] = { 80000.0f, 65503.0f, 65504.0f, 65520.0f, 65521.0f, 65534.0f, 65535.0f, 65536.0f,
+ -80000.0f, -65503.0f, -65504.0f, -65520.0f, -65521.0f, -65534.0f, -65535.0f, -65536.0f,
+ INFINITY, -INFINITY, NAN, -NAN, 0.0f, -0.0f },
+ single_exp[22] = { 65536.0f, 65504.0f, 65504.0f, 65504.0f, 65536.0f, 65536.0f, 65535.0f, 65536.0f,
+ -65536.0f, -65504.0f, -65504.0f, -65504.0f, -65536.0f, -65536.0f, -65535.0f, -65536.0f,
+ 65536.0f, -131008.0f, 131008.0f, -131008.0f, 0.0f, -0.0f },
+ single_res[22];
+ /* half_ver2 occurs on WXPPROSP3 (32 bit math), WVISTAADM (32 bit math), W7PRO (32 bit math) */
+ WORD half_ver1[22] = { 0x7c00, 0x7bff, 0x7bff, 0x7bff, 0x7c00, 0x7c00, 0x7c00, 0x7c00,
+ 0xfc00, 0xfbff, 0xfbff, 0xfbff, 0xfc00, 0xfc00, 0xfc00, 0xfc00,
+ 0x7c00, 0xffff, 0x7fff, 0xffff, 0x0, 0x8000 },
+ half_ver2[22] = { 0x7ce2, 0x7bff, 0x7bff, 0x7c00, 0x7c00, 0x7c00, 0x7c00, 0x7c00,
+ 0xfce2, 0xfbff, 0xfbff, 0xfc00, 0xfc00, 0xfc00, 0xfc00, 0xfc00,
+ 0x7fff, 0xffff, 0x7fff, 0xffff, 0x0, 0x8000 };
+
+ /* exception on NULL out or in parameter */
+ out = D3DXFloat32To16Array(half_res, single, 0);
+ ok(out == half_res, "Got %p, expected %p.\n", out, half_res);
+
+ out = D3DXFloat32To16Array(half_res, single, 22);
+ ok(out == half_res, "Got %p, expected %p.\n", out, half_res);
+
+ for (i = 0; i < 22; i++)
+ {
+ ok(half_res[i].value == half_ver1[i] ||
+ half_res[i].value == half_ver2[i], "Got %x, expected %x or %x for index %d.\n",
+ half_res[i].value, half_ver1[i], half_ver2[i], i);
+ }
+
+ /* exception on NULL out or in parameter */
+ out = D3DXFloat16To32Array(single_res, (D3DXFLOAT16 *)half_ver1, 0);
+ ok(out == single_res, "Got %p, expected %p.\n", out, single_res);
+
+ out = D3DXFloat16To32Array(single_res, (D3DXFLOAT16 *)half_ver1, 22);
+ ok(out == single_res, "Got %p, expected %p.\n", out, single_res);
+
+ for (i = 0; i < 22; i++)
+ {
+ ok(relative_error(single_res[i], single_exp[i]) < admitted_error, "Got %f, expected %f for index %d.\n",
+ single_res[i], single_exp[i], i);
+ }
+}
+
START_TEST(math)
{
D3DXColorTest();
@@ -2231,4 +2280,5 @@ START_TEST(math)
test_Matrix_Decompose();
test_Matrix_Transformation2D();
test_D3DXVec_Array();
+ test_D3DXFloat_Array();
}
diff --git a/include/d3dx9math.h b/include/d3dx9math.h
index f842e3e..cdb1deb 100644
--- a/include/d3dx9math.h
+++ b/include/d3dx9math.h
@@ -261,6 +261,21 @@ typedef struct D3DXCOLOR
FLOAT r, g, b, a;
} D3DXCOLOR, *LPD3DXCOLOR;
+typedef struct D3DXFLOAT16
+{
+#ifdef __cplusplus
+ D3DXFLOAT16();
+ D3DXFLOAT16(FLOAT f);
+ D3DXFLOAT16(CONST D3DXFLOAT16 &f);
+
+ operator FLOAT ();
+
+ BOOL operator == (CONST D3DXFLOAT16 &) const;
+ BOOL operator != (CONST D3DXFLOAT16 &) const;
+#endif /* __cplusplus */
+ WORD value;
+} D3DXFLOAT16, *LPD3DXFLOAT16;
+
#ifdef __cplusplus
extern "C" {
#endif
@@ -358,6 +373,9 @@ D3DXVECTOR4* WINAPI D3DXVec4Normalize(D3DXVECTOR4 *pout, CONST D3DXVECTOR4 *pv);
D3DXVECTOR4* WINAPI D3DXVec4Transform(D3DXVECTOR4 *pout, CONST D3DXVECTOR4 *pv, CONST D3DXMATRIX *pm);
D3DXVECTOR4* WINAPI D3DXVec4TransformArray(D3DXVECTOR4 *pout, UINT outstride, CONST D3DXVECTOR4 *pv, UINT vstride, CONST D3DXMATRIX *pm, UINT n);
+D3DXFLOAT16 *WINAPI D3DXFloat32To16Array(D3DXFLOAT16 *pout, CONST FLOAT *pin, UINT n);
+FLOAT *WINAPI D3DXFloat16To32Array(FLOAT *pout, CONST D3DXFLOAT16 *pin, UINT n);
+
#ifdef __cplusplus
}
#endif
diff --git a/include/d3dx9math.inl b/include/d3dx9math.inl
index 3cd078a..3f55aef 100644
--- a/include/d3dx9math.inl
+++ b/include/d3dx9math.inl
@@ -851,6 +851,37 @@ inline BOOL D3DXCOLOR::operator != (CONST D3DXCOLOR& col) const
return r != col.r || g != col.g || b != col.b || a != col.a;
}
+inline D3DXFLOAT16::D3DXFLOAT16()
+{
+}
+
+inline D3DXFLOAT16::D3DXFLOAT16(FLOAT f)
+{
+ D3DXFloat32To16Array(this, &f, 1);
+}
+
+inline D3DXFLOAT16::D3DXFLOAT16(CONST D3DXFLOAT16 &f)
+{
+ value = f.value;
+}
+
+inline D3DXFLOAT16::operator FLOAT ()
+{
+ FLOAT f;
+ D3DXFloat16To32Array(&f, this, 1);
+ return f;
+}
+
+inline BOOL D3DXFLOAT16::operator == (CONST D3DXFLOAT16 &f) const
+{
+ return value == f.value;
+}
+
+inline BOOL D3DXFLOAT16::operator != (CONST D3DXFLOAT16 &f) const
+{
+ return value != f.value;
+}
+
#endif /* __cplusplus */
/*_______________D3DXCOLOR_____________________*/
--
1.7.4
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