This extension provides a new texture and sampler parameter
(TEXTURE_REDUCTION_MODE_ARB) which allows applications to produce
a filtered texel value by computing a component-wise minimum (MIN)
or maximum (MAX) of the texels that would normally be averaged.
v2: - Remove extension from compat contexts (Ian Romanick)
- Add missing extension checks & early return (Emil Velikov)
---
src/mesa/main/attrib.c | 4 ++++
src/mesa/main/extensions_table.h | 1 +
src/mesa/main/formatquery.c | 18 ++++++++++++++++
src/mesa/main/mtypes.h | 2 ++
src/mesa/main/samplerobj.c | 45 ++++++++++++++++++++++++++++++++++++++++
src/mesa/main/texobj.c | 2 ++
src/mesa/main/texobj.h | 2 +-
src/mesa/main/texparam.c | 34 ++++++++++++++++++++++++++++++
8 files changed, 107 insertions(+), 1 deletion(-)
diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index 43b5856901..a5c9a32513 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -884,6 +884,10 @@ pop_texture_group(struct gl_context *ctx, struct
texture_state *texstate)
_mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
samp->MaxAnisotropy);
}
+ if (ctx->Extensions.ARB_texture_filter_minmax) {
+ _mesa_TexParameteri(target, GL_TEXTURE_REDUCTION_MODE_ARB,
+ samp->ReductionMode);
+ }
if (ctx->Extensions.ARB_shadow) {
_mesa_TexParameteri(target, GL_TEXTURE_COMPARE_MODE,
samp->CompareMode);
diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h
index 5b66e7d30d..3a7c3cf1d4 100644
--- a/src/mesa/main/extensions_table.h
+++ b/src/mesa/main/extensions_table.h
@@ -146,6 +146,7 @@ EXT(ARB_texture_env_combine ,
ARB_texture_env_combine
EXT(ARB_texture_env_crossbar , ARB_texture_env_crossbar
, GLL, x , x , x , 2001)
EXT(ARB_texture_env_dot3 , ARB_texture_env_dot3
, GLL, x , x , x , 2001)
EXT(ARB_texture_filter_anisotropic , ARB_texture_filter_anisotropic
, GLL, GLC, x , x , 2017)
+EXT(ARB_texture_filter_minmax , ARB_texture_filter_minmax
, x , GLC, x , x , 2017)
EXT(ARB_texture_float , ARB_texture_float
, GLL, GLC, x , x , 2004)
EXT(ARB_texture_gather , ARB_texture_gather
, GLL, GLC, x , x , 2009)
EXT(ARB_texture_mirror_clamp_to_edge , ARB_texture_mirror_clamp_to_edge
, GLL, GLC, x , x , 2013)
diff --git a/src/mesa/main/formatquery.c b/src/mesa/main/formatquery.c
index 61f798c88f..52c7c25d8c 100644
--- a/src/mesa/main/formatquery.c
+++ b/src/mesa/main/formatquery.c
@@ -232,6 +232,15 @@ _legal_parameters(struct gl_context *ctx, GLenum target,
GLenum internalformat,
}
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!query2 || !_mesa_has_ARB_texture_filter_minmax(ctx)) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetInternalformativ(pname=%s)",
+ _mesa_enum_to_string(pname));
+ return false;
+ }
+ break;
+
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetInternalformativ(pname=%s)",
@@ -375,6 +384,7 @@ _set_default_response(GLenum pname, GLint buffer[16])
case GL_STENCIL_RENDERABLE:
case GL_MIPMAP:
case GL_TEXTURE_COMPRESSED:
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
buffer[0] = GL_FALSE;
break;
@@ -1542,6 +1552,14 @@ _mesa_GetInternalformativ(GLenum target, GLenum
internalformat, GLenum pname,
buffer);
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!_mesa_has_ARB_texture_filter_minmax(ctx))
+ goto end;
+
+ ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname,
+ buffer);
+ break;
+
default:
unreachable("bad param");
}
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 4682e02fc8..83cf56c0a1 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -989,6 +989,7 @@ struct gl_sampler_object
GLenum CompareFunc; /**< GL_ARB_shadow */
GLenum sRGBDecode; /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
GLboolean CubeMapSeamless; /**< GL_AMD_seamless_cubemap_per_texture */
+ GLenum ReductionMode; /**< GL_ARB_texture_filter_minmax */
/** GL_ARB_bindless_texture */
bool HandleAllocated;
@@ -4107,6 +4108,7 @@ struct gl_extensions
GLboolean ARB_texture_env_crossbar;
GLboolean ARB_texture_env_dot3;
GLboolean ARB_texture_filter_anisotropic;
+ GLboolean ARB_texture_filter_minmax;
GLboolean ARB_texture_float;
GLboolean ARB_texture_gather;
GLboolean ARB_texture_mirror_clamp_to_edge;
diff --git a/src/mesa/main/samplerobj.c b/src/mesa/main/samplerobj.c
index 5ebf9e24f9..ce8819af38 100644
--- a/src/mesa/main/samplerobj.c
+++ b/src/mesa/main/samplerobj.c
@@ -135,6 +135,7 @@ _mesa_init_sampler_object(struct gl_sampler_object
*sampObj, GLuint name)
sampObj->sRGBDecode = GL_DECODE_EXT;
sampObj->CubeMapSeamless = GL_FALSE;
sampObj->HandleAllocated = GL_FALSE;
+ sampObj->ReductionMode = GL_WEIGHTED_AVERAGE_ARB;
/* GL_ARB_bindless_texture */
_mesa_init_sampler_handles(sampObj);
@@ -852,6 +853,27 @@ set_sampler_srgb_decode(struct gl_context *ctx,
return GL_TRUE;
}
+static GLuint
+set_sampler_reduction_mode(struct gl_context *ctx,
+ struct gl_sampler_object *samp, GLint param)
+{
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ return INVALID_PARAM;
+
+ if (samp->ReductionMode == param)
+ return GL_FALSE;
+
+ if (param != GL_MIN &&
+ param != GL_MAX &&
+ param != GL_WEIGHTED_AVERAGE_ARB) {
+ return INVALID_PARAM;
+ }
+
+ flush(ctx);
+ samp->ReductionMode = param;
+ return GL_TRUE;
+}
+
static struct gl_sampler_object *
sampler_parameter_error_check(struct gl_context *ctx, GLuint sampler,
bool get, const char *name)
@@ -937,6 +959,9 @@ _mesa_SamplerParameteri(GLuint sampler, GLenum pname, GLint
param)
case GL_TEXTURE_SRGB_DECODE_EXT:
res = set_sampler_srgb_decode(ctx, sampObj, param);
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ res = set_sampler_reduction_mode(ctx, sampObj, param);
+ break;
case GL_TEXTURE_BORDER_COLOR:
/* fall-through */
default:
@@ -1464,6 +1489,11 @@ _mesa_GetSamplerParameteriv(GLuint sampler, GLenum
pname, GLint *params)
goto invalid_pname;
*params = (GLenum) sampObj->sRGBDecode;
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ goto invalid_pname;
+ *params = sampObj->ReductionMode;
+ break;
default:
goto invalid_pname;
}
@@ -1536,6 +1566,11 @@ _mesa_GetSamplerParameterfv(GLuint sampler, GLenum
pname, GLfloat *params)
goto invalid_pname;
*params = (GLfloat) sampObj->sRGBDecode;
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ goto invalid_pname;
+ *params = (GLfloat) sampObj->ReductionMode;
+ break;
default:
goto invalid_pname;
}
@@ -1608,6 +1643,11 @@ _mesa_GetSamplerParameterIiv(GLuint sampler, GLenum
pname, GLint *params)
goto invalid_pname;
*params = (GLenum) sampObj->sRGBDecode;
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ goto invalid_pname;
+ *params = sampObj->ReductionMode;
+ break;
default:
goto invalid_pname;
}
@@ -1680,6 +1720,11 @@ _mesa_GetSamplerParameterIuiv(GLuint sampler, GLenum
pname, GLuint *params)
goto invalid_pname;
*params = (GLenum) sampObj->sRGBDecode;
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ goto invalid_pname;
+ *params = sampObj->ReductionMode;
+ break;
default:
goto invalid_pname;
}
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index 02c4767788..a81692d22f 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -325,6 +325,7 @@ _mesa_initialize_texture_object( struct gl_context *ctx,
obj->BufferObjectFormat = GL_R8;
obj->_BufferObjectFormat = MESA_FORMAT_R_UNORM8;
obj->ImageFormatCompatibilityType = GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE;
+ obj->Sampler.ReductionMode = GL_WEIGHTED_AVERAGE_ARB;
/* GL_ARB_bindless_texture */
_mesa_init_texture_handles(obj);
@@ -465,6 +466,7 @@ _mesa_copy_texture_object( struct gl_texture_object *dest,
dest->_Swizzle = src->_Swizzle;
dest->_IsHalfFloat = src->_IsHalfFloat;
dest->_IsFloat = src->_IsFloat;
+ dest->Sampler.ReductionMode = src->Sampler.ReductionMode;
dest->RequiredTextureImageUnits = src->RequiredTextureImageUnits;
}
diff --git a/src/mesa/main/texobj.h b/src/mesa/main/texobj.h
index e67ce3ff9d..306f4a7740 100644
--- a/src/mesa/main/texobj.h
+++ b/src/mesa/main/texobj.h
@@ -125,7 +125,7 @@ _mesa_is_texture_complete(const struct gl_texture_object
*texObj,
* be forbidden, however it is allowed per GL 4.5 rules, allow it
* even without GL 4.5 since it was a spec mistake.
*/
- if ((texObj->_IsIntegerFormat ||
+ if (((texObj->_IsIntegerFormat && sampler->ReductionMode ==
GL_WEIGHTED_AVERAGE_ARB) ||
(texObj->StencilSampling &&
texObj->Image[0][texObj->BaseLevel]->_BaseFormat ==
GL_DEPTH_STENCIL)) &&
(sampler->MagFilter != GL_NEAREST ||
diff --git a/src/mesa/main/texparam.c b/src/mesa/main/texparam.c
index 4a0f61eda8..2729dba4a4 100644
--- a/src/mesa/main/texparam.c
+++ b/src/mesa/main/texparam.c
@@ -630,6 +630,26 @@ set_tex_parameteri(struct gl_context *ctx,
}
goto invalid_pname;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ goto invalid_pname;
+
+ if (!_mesa_target_allows_setting_sampler_parameters(texObj->Target))
+ goto invalid_enum;
+
+ if (texObj->Sampler.ReductionMode == params[0])
+ return GL_FALSE;
+
+ if (params[0] != GL_MIN &&
+ params[0] != GL_MAX &&
+ params[0] != GL_WEIGHTED_AVERAGE_ARB) {
+ goto invalid_pname;
+ }
+
+ flush(ctx);
+ texObj->Sampler.ReductionMode = params[0];
+ return GL_TRUE;
+
default:
goto invalid_pname;
}
@@ -836,6 +856,7 @@ _mesa_texture_parameterf(struct gl_context *ctx,
case GL_TEXTURE_SWIZZLE_G_EXT:
case GL_TEXTURE_SWIZZLE_B_EXT:
case GL_TEXTURE_SWIZZLE_A_EXT:
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
{
GLint p[4];
p[0] = (param > 0) ?
@@ -888,6 +909,7 @@ _mesa_texture_parameterfv(struct gl_context *ctx,
case GL_DEPTH_STENCIL_TEXTURE_MODE:
case GL_TEXTURE_SRGB_DECODE_EXT:
case GL_TEXTURE_CUBE_MAP_SEAMLESS:
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
{
/* convert float param to int */
GLint p[4];
@@ -2040,6 +2062,12 @@ get_tex_parameterfv(struct gl_context *ctx,
*params = ENUM_TO_FLOAT(obj->TextureTiling);
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ goto invalid_pname;
+ *params = (GLfloat) obj->Sampler.ReductionMode;
+ break;
+
default:
goto invalid_pname;
}
@@ -2278,6 +2306,12 @@ get_tex_parameteriv(struct gl_context *ctx,
*params = (GLint) obj->TextureTiling;
break;
+ case GL_TEXTURE_REDUCTION_MODE_ARB:
+ if (!ctx->Extensions.ARB_texture_filter_minmax)
+ goto invalid_pname;
+ *params = (GLint) obj->Sampler.ReductionMode;
+ break;
+
default:
goto invalid_pname;
}
--
2.14.3
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