6 Sep
2016
6 Sep
'16
6:41 a.m.
Gerald Pfeifer <gerald(a)pfeifer.com> wrote:
--- a/include/d3dtypes.h
+++ b/include/d3dtypes.h
@@ -53,7 +53,7 @@ typedef LONG D3DFIXED;
#define RGBA_GETRED(rgb) (((rgb) >> 16) & 0xff)
#define RGBA_GETGREEN(rgb) (((rgb) >> 8) & 0xff)
#define RGBA_GETBLUE(rgb) ((rgb) & 0xff)
-#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((a) << 24) | ((r) << 16) |
((g) << 8) | (b)))
+#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((unsigned)(a) << 24) | ((r) <<
16) | ((g) << 8) | (b)))
This is a public header, probably you need to fix the callers of this macro
instead.
--
Dmitry.
6 Sep
6 Sep
8:48 a.m.
New subject: include: Avoid overflow (warning) in RGBA_MAKE.
On 6 September 2016 at 08:41, Dmitry Timoshkov <dmitry(a)baikal.ru> wrote:
Gerald Pfeifer <gerald(a)pfeifer.com> wrote:
Signed overflow is undefined, so this change is compatible. It's also
unlikely to be an issue in practice on any architecture we support. I
might have preferred something similar to D3DCOLOR_ARGB though.
That's not to say the users of the macro don't have room for improvement.
--- a/include/d3dtypes.h
+++ b/include/d3dtypes.h
@@ -53,7 +53,7 @@ typedef LONG D3DFIXED;
#define RGBA_GETRED(rgb) (((rgb) >> 16) & 0xff)
#define RGBA_GETGREEN(rgb) (((rgb) >> 8) & 0xff)
#define RGBA_GETBLUE(rgb) ((rgb) & 0xff)
-#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((a) << 24) | ((r) << 16) |
((g) << 8) | (b)))
+#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((unsigned)(a) << 24) | ((r) <<
16) | ((g) << 8) | (b)))
This is a public header, probably you need to fix the callers of this macro
instead.
26 Feb
26 Feb
2:22 p.m.
New subject: include: Avoid overflow (warning) in RGBA_MAKE.
Hi guys,
On Tue, 6 Sep 2016, Henri Verbeet wrote:
On 6 September 2016 at 08:41, Dmitry Timoshkov
<dmitry(a)baikal.ru> wrote:
Signed overflow is undefined, so this change is compatible.
It's also
unlikely to be an issue in practice on any architecture we support. I
might have preferred something similar to D3DCOLOR_ARGB though.
That's not to say the users of the macro don't have room for improvement.
I noticed this has not been committed (nor rejected apparently).
but after reverting it locally, I do not see the warnings that
triggered this any longer.
Did one of you commit and alternative fix?
Gerald
---
a/include/d3dtypes.h
+++ b/include/d3dtypes.h
@@ -53,7 +53,7 @@ typedef LONG D3DFIXED;
#define RGBA_GETRED(rgb) (((rgb) >> 16) & 0xff)
#define RGBA_GETGREEN(rgb) (((rgb) >> 8) & 0xff)
#define RGBA_GETBLUE(rgb) ((rgb) & 0xff)
-#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((a) << 24) | ((r) << 16) |
((g) << 8) | (b)))
+#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((unsigned)(a) << 24) | ((r) <<
16) | ((g) << 8) | (b)))
This is a public header, probably you need to fix the callers of this
macro instead.
3 p.m.
New subject: include: Avoid overflow (warning) in RGBA_MAKE.
On 26 February 2017 at 15:22, Gerald Pfeifer <gerald(a)pfeifer.com> wrote:
On Tue, 6 Sep 2016, Henri Verbeet wrote:
Commit 060ea15ae2c1604d51d3df1460e99c7d6e6211cf should have avoided the issue.
On 6 September 2016 at 08:41, Dmitry Timoshkov
<dmitry(a)baikal.ru> wrote:
Signed overflow is undefined, so this change is compatible.
It's also
unlikely to be an issue in practice on any architecture we support. I
might have preferred something similar to D3DCOLOR_ARGB though.
That's not to say the users of the macro don't have room for improvement.
I noticed this has not been committed (nor rejected apparently).
but after reverting it locally, I do not see the warnings that
triggered this any longer.
Did one of you commit and alternative fix?
---
a/include/d3dtypes.h
+++ b/include/d3dtypes.h
@@ -53,7 +53,7 @@ typedef LONG D3DFIXED;
#define RGBA_GETRED(rgb) (((rgb) >> 16) & 0xff)
#define RGBA_GETGREEN(rgb) (((rgb) >> 8) & 0xff)
#define RGBA_GETBLUE(rgb) ((rgb) & 0xff)
-#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((a) << 24) | ((r) << 16) |
((g) << 8) | (b)))
+#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((unsigned)(a) << 24) | ((r) <<
16) | ((g) << 8) | (b)))
This is a public header, probably you need to fix the callers of this
macro instead.
10:22 p.m.
New subject: include: Avoid overflow (warning) in RGBA_MAKE.
On Sun, 26 Feb 2017, Henri Verbeet wrote:
Yes, indeed, that looks like it. Thank you, Henri!
Gerald
>>>
-#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((a) << 24) | ((r) << 16) | ((g)
<< 8) | (b)))
>>> +#define RGBA_MAKE(r, g, b, a) ((D3DCOLOR) (((unsigned)(a) << 24) |
((r) << 16) | ((g) << 8) | (b)))
Commit
060ea15ae2c1604d51d3df1460e99c7d6e6211cf should have avoided the
issue.
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4 comments
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Dmitry Timoshkov -
Gerald Pfeifer -
Henri Verbeet