[Mesa-dev] [PATCH 13/20] mesa: Add _mesa_pack_uint_rgba_row() format conversion function
Samuel Iglesias Gonsálvez
siglesias at igalia.com
Wed Nov 19 23:15:17 PST 2014
On Tue, 2014-11-18 at 11:05 -0800, Jason Ekstrand wrote:
>
>
> On Tue, Nov 18, 2014 at 12:44 AM, Iago Toral Quiroga
> <itoral at igalia.com> wrote:
> From: Samuel Iglesias Gonsalvez <siglesias at igalia.com>
>
> We will use this later on to handle uint conversion scenarios
> in a master
> convert function.
>
> Signed-off-by: Samuel Iglesias Gonsalvez
> <siglesias at igalia.com>
> ---
> src/mesa/main/format_pack.c.mako | 88
> ++++++++++++++++++++++++++++++++++++++++
> src/mesa/main/format_pack.h | 3 ++
> 2 files changed, 91 insertions(+)
>
> diff --git a/src/mesa/main/format_pack.c.mako
> b/src/mesa/main/format_pack.c.mako
> index 13a20c1..b9f4656 100644
> --- a/src/mesa/main/format_pack.c.mako
> +++ b/src/mesa/main/format_pack.c.mako
> @@ -150,6 +150,62 @@ pack_ubyte_r11g11b10_float(const GLubyte
> src[4], void *dst)
> *d = float3_to_r11g11b10f(rgb);
> }
>
> +/* uint packing functions */
> +
> +%for f in rgb_formats:
> + %if not f.is_int():
> + <% continue %>
> + %elif f.is_normalized():
> + <% continue %>
> + %elif f.is_compressed():
> + <% continue %>
> + %endif
> +
> +static inline void
> +pack_uint_${f.short_name()}(const GLuint src[4], void *dst)
> +{
> + %for (i, c) in enumerate(f.channels):
> + <% i = f.swizzle.inverse()[i] %>
> + %if c.type == 'x':
> + <% continue %>
> + %endif
> +
> + ${channel_datatype(c)} ${c.name} =
> + %if not f.is_normalized():
>
>
> This if isn't needed. If you want the assertion, an "assert not
> f.is_normalized" would be ok, but I don't see the need given the
> continues above.
You are right, this conditional is not needed. I'm going to remove it
for the second version of the series.
>
>
> + %if c.type == parser.FLOAT and c.size == 32:
> + UINT_TO_FLOAT(src[${i}]);
>
>
> Why are we doing UINT_TO_FLOAT here? If these are for non-normalied
> functions, shouldn't we just be clampping the floating-point value to
> the maximum range for the integer?
>
This is a mistake. I'm going to remove it.
Thanks,
Sam
>
> + %elif c.type == parser.FLOAT and c.size == 16:
> + _mesa_float_to_half(UINT_TO_FLOAT(src[${i}]));
> + %else:
> + (${channel_datatype(c)}) src[${i}];
> + %endif
> + %else:
> + <% assert False %>
> + %endif
> + %endfor
> +
> + %if f.layout == parser.ARRAY:
> + ${format_datatype(f)} *d = (${format_datatype(f)}
> *)dst;
> + %for (i, c) in enumerate(f.channels):
> + %if c.type == 'x':
> + <% continue %>
> + %endif
> + d[${i}] = ${c.name};
> + %endfor
> + %elif f.layout == parser.PACKED:
> + ${format_datatype(f)} d = 0;
> + %for (i, c) in enumerate(f.channels):
> + %if c.type == 'x':
> + <% continue %>
> + %endif
> + d |= PACK(${c.name}, ${c.shift}, ${c.size});
> + %endfor
> + (*(${format_datatype(f)} *)dst) = d;
> + %else:
> + <% assert False %>
> + %endif
> +}
> +%endfor
>
> /* float packing functions */
>
> @@ -298,6 +354,38 @@ _mesa_pack_ubyte_rgba_row(mesa_format
> format, GLuint n,
> }
>
> /**
> + * Pack a row of GLuint rgba[4] values to the destination.
> + */
> +void
> +_mesa_pack_uint_rgba_row(mesa_format format, GLuint n,
> + const GLuint src[][4], void *dst)
> +{
> + GLuint i;
> + GLubyte *d = dst;
> +
> + switch (format) {
> +%for f in rgb_formats:
> + %if not f.is_int():
> + <% continue %>
> + %elif f.is_normalized():
> + <% continue %>
> + %elif f.is_compressed():
> + <% continue %>
> + %endif
> +
> + case ${f.name}:
> + for (i = 0; i < n; ++i) {
> + pack_uint_${f.short_name()}(src[i], d);
> + d += ${f.block_size() / 8};
> + }
> + break;
> +%endfor
> + default:
> + assert(!"Invalid format");
> + }
> +}
> +
> +/**
> * Pack a row of GLfloat rgba[4] values to the destination.
> */
> void
> diff --git a/src/mesa/main/format_pack.h
> b/src/mesa/main/format_pack.h
> index 2577def..1582ad1 100644
> --- a/src/mesa/main/format_pack.h
> +++ b/src/mesa/main/format_pack.h
> @@ -77,6 +77,9 @@ extern void
> _mesa_pack_ubyte_rgba_row(mesa_format format, GLuint n,
> const GLubyte src[][4], void *dst);
>
> +extern void
> +_mesa_pack_uint_rgba_row(mesa_format format, GLuint n,
> + const GLuint src[][4], void *dst);
>
> extern void
> _mesa_pack_ubyte_rgba_rect(mesa_format format, GLuint width,
> GLuint height,
> --
> 1.9.1
>
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>
>
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