On Tue, Jul 1, 2014 at 2:06 PM, Neil Roberts <n...@linux.intel.com> wrote:
> Jason Ekstrand <ja...@jlekstrand.net> writes:
>
>>> +static void
>>> +clear_image_to_zero(GLubyte *dstMap, GLint dstRowStride,
>>> + GLsizei width, GLsizei height,
>>> + GLsizei clearValueSize)
>>> +{
>>> + while (height-- > 0) {
>>> + memset(dstMap, 0, clearValueSize * width);
>>> + dstMap += dstRowStride;
>>> + }
>>> +}
>>>
>>
>> Technically, this should always work, but you might want to throw in a
>> comment about floating-point textures.
>
> I'm not sure what you mean here. Are you saying that hypothetically
> floating-point textures might not represent 0 as zero bytes?
Not entirely sure how to interpret what the spec says, but something
to potentially consider is MESA_ycbcr_texture (supported by swrast).
RGBA 0 (black) != 0 in ycbcr... all 0's there are a green color.
Also probably not _too_ important to worry too much about, just wanted
to point it out.
-ilia
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