/* All samplers must be uploaded in a single contiguous array, which
* complicates various things. However, this is still too confusing -
* FIXME: simplify all the different new texture state flags.
*/
static void upload_wm_samplers(struct brw_context *brw)
{
unsigned unit;
unsigned sampler_count = 0;
/* BRW_NEW_SAMPLER */
for (unit = 0; unit < brw->num_textures && unit < brw->num_samplers;
unit++) {
/* determine unit enable/disable by looking for a bound texture */
if (brw->attribs.Texture[unit]) {
const struct pipe_sampler_state *sampler = brw->attribs.Samplers[unit];
unsigned sdc_gs_offset = upload_default_color(brw, sampler->border_color);
brw_update_sampler_state(sampler,
sdc_gs_offset,
&brw->wm.sampler[unit]);
sampler_count = unit + 1;
}
}
if (brw->wm.sampler_count != sampler_count) {
brw->wm.sampler_count = sampler_count;
brw->state.dirty.cache |= CACHE_NEW_SAMPLER;
}
brw->wm.sampler_gs_offset = 0;
if (brw->wm.sampler_count)
brw->wm.sampler_gs_offset =
brw_cache_data_sz(&brw->cache[BRW_SAMPLER],
brw->wm.sampler,
sizeof(struct brw_sampler_state) * brw->wm.sampler_count);
}
/**
* Sets the sampler state for a single unit.
*/
static void
gen7_update_sampler_state(struct brw_context *brw, int unit,
struct gen7_sampler_state *sampler)
{
struct intel_context *intel = &brw->intel;
struct gl_context *ctx = &intel->ctx;
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *texObj = texUnit->_Current;
struct gl_sampler_object *gl_sampler = _mesa_get_samplerobj(ctx, unit);
bool using_nearest = false;
switch (gl_sampler->MinFilter) {
case GL_NEAREST:
sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
using_nearest = true;
break;
case GL_LINEAR:
sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
break;
case GL_NEAREST_MIPMAP_NEAREST:
sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
break;
case GL_LINEAR_MIPMAP_NEAREST:
sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
break;
case GL_NEAREST_MIPMAP_LINEAR:
sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
break;
case GL_LINEAR_MIPMAP_LINEAR:
sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
break;
default:
break;
}
/* Set Anisotropy: */
if (gl_sampler->MaxAnisotropy > 1.0) {
sampler->ss0.min_filter = BRW_MAPFILTER_ANISOTROPIC;
sampler->ss0.mag_filter = BRW_MAPFILTER_ANISOTROPIC;
if (gl_sampler->MaxAnisotropy > 2.0) {
sampler->ss3.max_aniso = MIN2((gl_sampler->MaxAnisotropy - 2) / 2,
BRW_ANISORATIO_16);
}
}
else {
switch (gl_sampler->MagFilter) {
case GL_NEAREST:
sampler->ss0.mag_filter = BRW_MAPFILTER_NEAREST;
using_nearest = true;
break;
case GL_LINEAR:
sampler->ss0.mag_filter = BRW_MAPFILTER_LINEAR;
break;
default:
break;
}
}
sampler->ss3.r_wrap_mode = translate_wrap_mode(gl_sampler->WrapR,
using_nearest);
sampler->ss3.s_wrap_mode = translate_wrap_mode(gl_sampler->WrapS,
using_nearest);
sampler->ss3.t_wrap_mode = translate_wrap_mode(gl_sampler->WrapT,
using_nearest);
/* Cube-maps on 965 and later must use the same wrap mode for all 3
* coordinate dimensions. Futher, only CUBE and CLAMP are valid.
*/
if (texObj->Target == GL_TEXTURE_CUBE_MAP) {
if (ctx->Texture.CubeMapSeamless &&
(gl_sampler->MinFilter != GL_NEAREST ||
gl_sampler->MagFilter != GL_NEAREST)) {
sampler->ss3.r_wrap_mode = BRW_TEXCOORDMODE_CUBE;
sampler->ss3.s_wrap_mode = BRW_TEXCOORDMODE_CUBE;
sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_CUBE;
} else {
sampler->ss3.r_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
sampler->ss3.s_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
}
} else if (texObj->Target == GL_TEXTURE_1D) {
/* There's a bug in 1D texture sampling - it actually pays
* attention to the wrap_t value, though it should not.
* Override the wrap_t value here to GL_REPEAT to keep
* any nonexistent border pixels from floating in.
*/
sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_WRAP;
}
/* Set shadow function: */
if (gl_sampler->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) {
/* Shadowing is "enabled" by emitting a particular sampler
* message (sample_c). So need to recompile WM program when
* shadow comparison is enabled on each/any texture unit.
*/
sampler->ss1.shadow_function =
intel_translate_shadow_compare_func(gl_sampler->CompareFunc);
}
/* Set LOD bias: */
sampler->ss0.lod_bias = S_FIXED(CLAMP(texUnit->LodBias +
gl_sampler->LodBias, -16, 15), 8);
sampler->ss0.lod_preclamp = 1; /* OpenGL mode */
sampler->ss0.default_color_mode = 0; /* OpenGL/DX10 mode */
/* Set BaseMipLevel, MaxLOD, MinLOD:
*
* XXX: I don't think that using firstLevel, lastLevel works,
* because we always setup the surface state as if firstLevel ==
* level zero. Probably have to subtract firstLevel from each of
* these:
*/
sampler->ss0.base_level = U_FIXED(0, 1);
sampler->ss1.max_lod = U_FIXED(CLAMP(gl_sampler->MaxLod, 0, 13), 8);
sampler->ss1.min_lod = U_FIXED(CLAMP(gl_sampler->MinLod, 0, 13), 8);
upload_default_color(brw, gl_sampler, unit);
sampler->ss2.default_color_pointer = brw->wm.sdc_offset[unit] >> 5;
}
/**
* Sets the sampler state for a single unit.
*/
static void
gen7_update_sampler_state(struct brw_context *brw, int unit, int ss_index,
struct gen7_sampler_state *sampler,
uint32_t *sdc_offset)
{
struct gl_context *ctx = &brw->ctx;
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *texObj = texUnit->_Current;
struct gl_sampler_object *gl_sampler = _mesa_get_samplerobj(ctx, unit);
bool using_nearest = false;
/* These don't use samplers at all. */
if (texObj->Target == GL_TEXTURE_BUFFER)
return;
switch (gl_sampler->MinFilter) {
case GL_NEAREST:
sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
using_nearest = true;
break;
case GL_LINEAR:
sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
sampler->ss0.mip_filter = BRW_MIPFILTER_NONE;
break;
case GL_NEAREST_MIPMAP_NEAREST:
sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
break;
case GL_LINEAR_MIPMAP_NEAREST:
sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
sampler->ss0.mip_filter = BRW_MIPFILTER_NEAREST;
break;
case GL_NEAREST_MIPMAP_LINEAR:
sampler->ss0.min_filter = BRW_MAPFILTER_NEAREST;
sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
break;
case GL_LINEAR_MIPMAP_LINEAR:
sampler->ss0.min_filter = BRW_MAPFILTER_LINEAR;
sampler->ss0.mip_filter = BRW_MIPFILTER_LINEAR;
break;
default:
break;
}
/* Set Anisotropy: */
if (gl_sampler->MaxAnisotropy > 1.0) {
sampler->ss0.min_filter = BRW_MAPFILTER_ANISOTROPIC;
sampler->ss0.mag_filter = BRW_MAPFILTER_ANISOTROPIC;
sampler->ss0.aniso_algorithm = 1;
if (gl_sampler->MaxAnisotropy > 2.0) {
sampler->ss3.max_aniso = MIN2((gl_sampler->MaxAnisotropy - 2) / 2,
BRW_ANISORATIO_16);
}
}
else {
switch (gl_sampler->MagFilter) {
case GL_NEAREST:
sampler->ss0.mag_filter = BRW_MAPFILTER_NEAREST;
using_nearest = true;
break;
case GL_LINEAR:
sampler->ss0.mag_filter = BRW_MAPFILTER_LINEAR;
break;
default:
break;
}
}
sampler->ss3.r_wrap_mode = translate_wrap_mode(gl_sampler->WrapR,
using_nearest);
sampler->ss3.s_wrap_mode = translate_wrap_mode(gl_sampler->WrapS,
using_nearest);
sampler->ss3.t_wrap_mode = translate_wrap_mode(gl_sampler->WrapT,
using_nearest);
/* Cube-maps on 965 and later must use the same wrap mode for all 3
* coordinate dimensions. Futher, only CUBE and CLAMP are valid.
*/
if (texObj->Target == GL_TEXTURE_CUBE_MAP ||
texObj->Target == GL_TEXTURE_CUBE_MAP_ARRAY) {
if ((ctx->Texture.CubeMapSeamless || gl_sampler->CubeMapSeamless) &&
(gl_sampler->MinFilter != GL_NEAREST ||
gl_sampler->MagFilter != GL_NEAREST)) {
sampler->ss3.r_wrap_mode = BRW_TEXCOORDMODE_CUBE;
sampler->ss3.s_wrap_mode = BRW_TEXCOORDMODE_CUBE;
sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_CUBE;
} else {
sampler->ss3.r_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
sampler->ss3.s_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_CLAMP;
}
} else if (texObj->Target == GL_TEXTURE_1D) {
/* There's a bug in 1D texture sampling - it actually pays
* attention to the wrap_t value, though it should not.
* Override the wrap_t value here to GL_REPEAT to keep
* any nonexistent border pixels from floating in.
*/
sampler->ss3.t_wrap_mode = BRW_TEXCOORDMODE_WRAP;
}
/* Set shadow function: */
if (gl_sampler->CompareMode == GL_COMPARE_R_TO_TEXTURE_ARB) {
/* Shadowing is "enabled" by emitting a particular sampler
* message (sample_c). So need to recompile WM program when
* shadow comparison is enabled on each/any texture unit.
*/
sampler->ss1.shadow_function =
intel_translate_shadow_compare_func(gl_sampler->CompareFunc);
}
/* Set LOD bias: */
sampler->ss0.lod_bias = S_FIXED(CLAMP(texUnit->LodBias +
gl_sampler->LodBias, -16, 15), 8);
sampler->ss0.lod_preclamp = 1; /* OpenGL mode */
sampler->ss0.default_color_mode = 0; /* OpenGL/DX10 mode */
sampler->ss0.base_level = U_FIXED(0, 1);
sampler->ss1.max_lod = U_FIXED(CLAMP(gl_sampler->MaxLod, 0, 13), 8);
sampler->ss1.min_lod = U_FIXED(CLAMP(gl_sampler->MinLod, 0, 13), 8);
/* The sampler can handle non-normalized texture rectangle coordinates
* natively
*/
if (texObj->Target == GL_TEXTURE_RECTANGLE) {
sampler->ss3.non_normalized_coord = 1;
}
upload_default_color(brw, gl_sampler, unit, sdc_offset);
sampler->ss2.default_color_pointer = *sdc_offset >> 5;
if (sampler->ss0.min_filter != BRW_MAPFILTER_NEAREST)
sampler->ss3.address_round |= BRW_ADDRESS_ROUNDING_ENABLE_U_MIN |
BRW_ADDRESS_ROUNDING_ENABLE_V_MIN |
BRW_ADDRESS_ROUNDING_ENABLE_R_MIN;
if (sampler->ss0.mag_filter != BRW_MAPFILTER_NEAREST)
sampler->ss3.address_round |= BRW_ADDRESS_ROUNDING_ENABLE_U_MAG |
BRW_ADDRESS_ROUNDING_ENABLE_V_MAG |
BRW_ADDRESS_ROUNDING_ENABLE_R_MAG;
}
