/**
* Return TRUE if the texture's sampler view swizzle is not equal to
* the texture's swizzle.
*
* \param stObj the st texture object,
*/
static boolean
check_sampler_swizzle(const struct st_texture_object *stObj,
struct pipe_sampler_view *sv)
{
unsigned swizzle = get_texture_format_swizzle(stObj);
return ((sv->swizzle_r != GET_SWZ(swizzle, 0)) ||
(sv->swizzle_g != GET_SWZ(swizzle, 1)) ||
(sv->swizzle_b != GET_SWZ(swizzle, 2)) ||
(sv->swizzle_a != GET_SWZ(swizzle, 3)));
}
/**
* Return TRUE if the texture's sampler view swizzle is not equal to
* the texture's swizzle.
*
* \param stObj the st texture object,
*/
MAYBE_UNUSED static boolean
check_sampler_swizzle(const struct st_context *st,
const struct st_texture_object *stObj,
const struct pipe_sampler_view *sv, unsigned glsl_version)
{
unsigned swizzle = get_texture_format_swizzle(st, stObj, glsl_version);
return ((sv->swizzle_r != GET_SWZ(swizzle, 0)) ||
(sv->swizzle_g != GET_SWZ(swizzle, 1)) ||
(sv->swizzle_b != GET_SWZ(swizzle, 2)) ||
(sv->swizzle_a != GET_SWZ(swizzle, 3)));
}
static struct pipe_sampler_view *
st_create_texture_sampler_view_from_stobj(struct pipe_context *pipe,
struct st_texture_object *stObj,
const struct gl_sampler_object *samp,
enum pipe_format format)
{
struct pipe_sampler_view templ;
unsigned swizzle = get_texture_format_swizzle(stObj);
u_sampler_view_default_template(&templ,
stObj->pt,
format);
if (stObj->pt->target == PIPE_BUFFER) {
unsigned base, size;
unsigned f, n;
const struct util_format_description *desc
= util_format_description(templ.format);
base = stObj->base.BufferOffset;
if (base >= stObj->pt->width0)
return NULL;
size = MIN2(stObj->pt->width0 - base, (unsigned)stObj->base.BufferSize);
f = ((base * 8) / desc->block.bits) * desc->block.width;
n = ((size * 8) / desc->block.bits) * desc->block.width;
if (!n)
return NULL;
templ.u.buf.first_element = f;
templ.u.buf.last_element = f + (n - 1);
} else {
templ.u.tex.first_level = stObj->base.MinLevel + stObj->base.BaseLevel;
templ.u.tex.last_level = last_level(stObj);
assert(templ.u.tex.first_level <= templ.u.tex.last_level);
templ.u.tex.first_layer = stObj->base.MinLayer;
templ.u.tex.last_layer = last_layer(stObj);
assert(templ.u.tex.first_layer <= templ.u.tex.last_layer);
templ.target = gl_target_to_pipe(stObj->base.Target);
}
if (swizzle != SWIZZLE_NOOP) {
templ.swizzle_r = GET_SWZ(swizzle, 0);
templ.swizzle_g = GET_SWZ(swizzle, 1);
templ.swizzle_b = GET_SWZ(swizzle, 2);
templ.swizzle_a = GET_SWZ(swizzle, 3);
}
return pipe->create_sampler_view(pipe, stObj->pt, &templ);
}
static struct pipe_sampler_view *
st_create_texture_sampler_view_from_stobj(struct st_context *st,
struct st_texture_object *stObj,
enum pipe_format format,
unsigned glsl_version)
{
struct pipe_sampler_view templ;
unsigned swizzle = get_texture_format_swizzle(st, stObj, glsl_version);
u_sampler_view_default_template(&templ, stObj->pt, format);
if (stObj->pt->target == PIPE_BUFFER) {
unsigned base, size;
base = stObj->base.BufferOffset;
if (base >= stObj->pt->width0)
return NULL;
size = MIN2(stObj->pt->width0 - base, (unsigned)stObj->base.BufferSize);
if (!size)
return NULL;
templ.u.buf.offset = base;
templ.u.buf.size = size;
} else {
templ.u.tex.first_level = stObj->base.MinLevel + stObj->base.BaseLevel;
templ.u.tex.last_level = last_level(stObj);
assert(templ.u.tex.first_level <= templ.u.tex.last_level);
if (stObj->layer_override) {
templ.u.tex.first_layer = templ.u.tex.last_layer = stObj->layer_override;
} else {
templ.u.tex.first_layer = stObj->base.MinLayer;
templ.u.tex.last_layer = last_layer(stObj);
}
assert(templ.u.tex.first_layer <= templ.u.tex.last_layer);
templ.target = gl_target_to_pipe(stObj->base.Target);
}
templ.swizzle_r = GET_SWZ(swizzle, 0);
templ.swizzle_g = GET_SWZ(swizzle, 1);
templ.swizzle_b = GET_SWZ(swizzle, 2);
templ.swizzle_a = GET_SWZ(swizzle, 3);
return st->pipe->create_sampler_view(st->pipe, stObj->pt, &templ);
}