static void
update_textures(struct st_context *st,
enum pipe_shader_type shader_stage,
const struct gl_program *prog,
struct pipe_sampler_view **sampler_views,
unsigned *out_num_textures)
{
const GLuint old_max = *out_num_textures;
GLbitfield samplers_used = prog->SamplersUsed;
GLbitfield texel_fetch_samplers = prog->info.textures_used_by_txf;
GLbitfield free_slots = ~prog->SamplersUsed;
GLbitfield external_samplers_used = prog->ExternalSamplersUsed;
GLuint unit;
if (samplers_used == 0x0 && old_max == 0)
return;
unsigned num_textures = 0;
/* prog->sh.data is NULL if it's ARB_fragment_program */
bool glsl130 = (prog->sh.data ? prog->sh.data->Version : 0) >= 130;
/* loop over sampler units (aka tex image units) */
for (unit = 0; samplers_used || unit < old_max;
unit++, samplers_used >>= 1, texel_fetch_samplers >>= 1) {
struct pipe_sampler_view *sampler_view = NULL;
if (samplers_used & 1) {
const GLuint texUnit = prog->SamplerUnits[unit];
/* The EXT_texture_sRGB_decode extension says:
*
* "The conversion of sRGB color space components to linear color
* space is always performed if the texel lookup function is one
* of the texelFetch builtin functions.
*
* Otherwise, if the texel lookup function is one of the texture
* builtin functions or one of the texture gather functions, the
* conversion of sRGB color space components to linear color space
* is controlled by the TEXTURE_SRGB_DECODE_EXT parameter.
*
* If the TEXTURE_SRGB_DECODE_EXT parameter is DECODE_EXT, the
* conversion of sRGB color space components to linear color space
* is performed.
*
* If the TEXTURE_SRGB_DECODE_EXT parameter is SKIP_DECODE_EXT,
* the value is returned without decoding. However, if the texture
* is also [statically] accessed with a texelFetch function, then
* the result of texture builtin functions and/or texture gather
* functions may be returned with decoding or without decoding."
*
* Note: the "statically" will be added to the language per
* https://cvs.khronos.org/bugzilla/show_bug.cgi?id=14934
*
* So we simply ignore the setting entirely for samplers that are
* (statically) accessed with a texelFetch function.
*/
st_update_single_texture(st, &sampler_view, texUnit, glsl130,
texel_fetch_samplers & 1);
num_textures = unit + 1;
}
pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
}
/* For any external samplers with multiplaner YUV, stuff the additional
* sampler views we need at the end.
*
* Trying to cache the sampler view in the stObj looks painful, so just
* re-create the sampler view for the extra planes each time. Main use
* case is video playback (ie. fps games wouldn't be using this) so I
* guess no point to try to optimize this feature.
*/
while (unlikely(external_samplers_used)) {
GLuint unit = u_bit_scan(&external_samplers_used);
GLuint extra = 0;
struct st_texture_object *stObj =
st_get_texture_object(st->ctx, prog, unit);
struct pipe_sampler_view tmpl;
if (!stObj)
continue;
/* use original view as template: */
tmpl = *sampler_views[unit];
switch (st_get_view_format(stObj)) {
case PIPE_FORMAT_NV12:
/* we need one additional R8G8 view: */
tmpl.format = PIPE_FORMAT_RG88_UNORM;
tmpl.swizzle_g = PIPE_SWIZZLE_Y; /* tmpl from Y plane is R8 */
extra = u_bit_scan(&free_slots);
sampler_views[extra] =
st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
break;
case PIPE_FORMAT_IYUV:
/* we need two additional R8 views: */
tmpl.format = PIPE_FORMAT_R8_UNORM;
extra = u_bit_scan(&free_slots);
sampler_views[extra] =
st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
extra = u_bit_scan(&free_slots);
sampler_views[extra] =
st->pipe->create_sampler_view(st->pipe, stObj->pt->next->next, &tmpl);
break;
default:
break;
}
num_textures = MAX2(num_textures, extra + 1);
}
cso_set_sampler_views(st->cso_context,
shader_stage,
num_textures,
sampler_views);
*out_num_textures = num_textures;
}
static void
update_textures(struct st_context *st,
gl_shader_stage mesa_shader,
const struct gl_program *prog,
unsigned max_units,
struct pipe_sampler_view **sampler_views,
unsigned *num_textures)
{
const GLuint old_max = *num_textures;
GLbitfield samplers_used = prog->SamplersUsed;
GLbitfield free_slots = ~prog->SamplersUsed;
GLbitfield external_samplers_used = prog->ExternalSamplersUsed;
GLuint unit;
enum pipe_shader_type shader_stage = st_shader_stage_to_ptarget(mesa_shader);
if (samplers_used == 0x0 && old_max == 0)
return;
*num_textures = 0;
/* loop over sampler units (aka tex image units) */
for (unit = 0; unit < max_units; unit++, samplers_used >>= 1) {
struct pipe_sampler_view *sampler_view = NULL;
if (samplers_used & 1) {
/* prog->sh.data is NULL if it's ARB_fragment_program */
unsigned glsl_version = prog->sh.data ? prog->sh.data->Version : 0;
const GLuint texUnit = prog->SamplerUnits[unit];
GLboolean retval;
retval = update_single_texture(st, &sampler_view, texUnit,
glsl_version);
if (retval == GL_FALSE)
continue;
*num_textures = unit + 1;
}
else if (samplers_used == 0 && unit >= old_max) {
/* if we've reset all the old views and we have no more new ones */
break;
}
pipe_sampler_view_reference(&(sampler_views[unit]), sampler_view);
}
/* For any external samplers with multiplaner YUV, stuff the additional
* sampler views we need at the end.
*
* Trying to cache the sampler view in the stObj looks painful, so just
* re-create the sampler view for the extra planes each time. Main use
* case is video playback (ie. fps games wouldn't be using this) so I
* guess no point to try to optimize this feature.
*/
while (unlikely(external_samplers_used)) {
GLuint unit = u_bit_scan(&external_samplers_used);
GLuint extra = 0;
struct st_texture_object *stObj =
st_get_texture_object(st->ctx, prog, unit);
struct pipe_sampler_view tmpl;
if (!stObj)
continue;
/* use original view as template: */
tmpl = *sampler_views[unit];
switch (st_get_view_format(stObj)) {
case PIPE_FORMAT_NV12:
/* we need one additional R8G8 view: */
tmpl.format = PIPE_FORMAT_RG88_UNORM;
tmpl.swizzle_g = PIPE_SWIZZLE_Y; /* tmpl from Y plane is R8 */
extra = u_bit_scan(&free_slots);
sampler_views[extra] =
st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
break;
case PIPE_FORMAT_IYUV:
/* we need two additional R8 views: */
tmpl.format = PIPE_FORMAT_R8_UNORM;
extra = u_bit_scan(&free_slots);
sampler_views[extra] =
st->pipe->create_sampler_view(st->pipe, stObj->pt->next, &tmpl);
extra = u_bit_scan(&free_slots);
sampler_views[extra] =
st->pipe->create_sampler_view(st->pipe, stObj->pt->next->next, &tmpl);
break;
default:
break;
}
*num_textures = MAX2(*num_textures, extra + 1);
}
cso_set_sampler_views(st->cso_context,
shader_stage,
*num_textures,
sampler_views);
}
/**
* Update the gallium driver's sampler state for fragment, vertex or
* geometry shader stage.
*/
static void
update_shader_samplers(struct st_context *st,
enum pipe_shader_type shader_stage,
const struct gl_program *prog,
unsigned max_units,
struct pipe_sampler_state *samplers,
unsigned *num_samplers)
{
GLbitfield samplers_used = prog->SamplersUsed;
GLbitfield free_slots = ~prog->SamplersUsed;
GLbitfield external_samplers_used = prog->ExternalSamplersUsed;
GLuint unit;
const GLuint old_max = *num_samplers;
const struct pipe_sampler_state *states[PIPE_MAX_SAMPLERS];
if (*num_samplers == 0 && samplers_used == 0x0)
return;
*num_samplers = 0;
/* loop over sampler units (aka tex image units) */
for (unit = 0; unit < max_units; unit++, samplers_used >>= 1) {
struct pipe_sampler_state *sampler = samplers + unit;
if (samplers_used & 1) {
const GLuint texUnit = prog->SamplerUnits[unit];
convert_sampler(st, sampler, texUnit);
states[unit] = sampler;
*num_samplers = unit + 1;
}
else if (samplers_used != 0 || unit < old_max) {
states[unit] = NULL;
}
else {
/* if we've reset all the old samplers and we have no more new ones */
break;
}
}
/* For any external samplers with multiplaner YUV, stuff the additional
* sampler states we need at the end.
*
* Just re-use the existing sampler-state from the primary slot.
*/
while (unlikely(external_samplers_used)) {
GLuint unit = u_bit_scan(&external_samplers_used);
GLuint extra = 0;
struct st_texture_object *stObj =
st_get_texture_object(st->ctx, prog, unit);
struct pipe_sampler_state *sampler = samplers + unit;
if (!stObj)
continue;
switch (st_get_view_format(stObj)) {
case PIPE_FORMAT_NV12:
/* we need one additional sampler: */
extra = u_bit_scan(&free_slots);
states[extra] = sampler;
break;
case PIPE_FORMAT_IYUV:
/* we need two additional samplers: */
extra = u_bit_scan(&free_slots);
states[extra] = sampler;
extra = u_bit_scan(&free_slots);
states[extra] = sampler;
break;
default:
break;
}
*num_samplers = MAX2(*num_samplers, extra + 1);
}
cso_set_samplers(st->cso_context, shader_stage, *num_samplers, states);
}