[Mesa-dev] [PATCH 3/4] glsl: add gl_BoundingBox and associated varying slots
Ilia Mirkin
imirkin at alum.mit.edu
Sun Aug 28 18:32:20 UTC 2016
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
src/compiler/glsl/builtin_variables.cpp | 12 ++++++++++++
src/compiler/glsl/ir_set_program_inouts.cpp | 4 +++-
src/compiler/shader_enums.c | 2 ++
src/compiler/shader_enums.h | 4 ++++
src/mesa/main/mtypes.h | 5 +++++
src/mesa/program/prog_print.c | 4 ++++
6 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/src/compiler/glsl/builtin_variables.cpp b/src/compiler/glsl/builtin_variables.cpp
index d379de6..036261f 100644
--- a/src/compiler/glsl/builtin_variables.cpp
+++ b/src/compiler/glsl/builtin_variables.cpp
@@ -1045,6 +1045,18 @@ builtin_variable_generator::generate_tcs_special_vars()
"gl_TessLevelOuter")->data.patch = 1;
add_output(VARYING_SLOT_TESS_LEVEL_INNER, array(float_t, 2),
"gl_TessLevelInner")->data.patch = 1;
+ /* XXX What to do if multiple are flipped on? */
+ int bbox_slot = state->ctx->Const.NoPrimitiveBoundingBoxOutput ? -1 :
+ VARYING_SLOT_BOUNDING_BOX0;
+ if (state->EXT_primitive_bounding_box_enable)
+ add_output(bbox_slot, array(vec4_t, 2), "gl_BoundingBoxEXT")
+ ->data.patch = 1;
+ if (state->OES_primitive_bounding_box_enable)
+ add_output(bbox_slot, array(vec4_t, 2), "gl_BoundingBoxOES")
+ ->data.patch = 1;
+ if (state->is_version(0, 320) || state->ARB_ES3_2_compatibility_enable)
+ add_output(bbox_slot, array(vec4_t, 2), "gl_BoundingBox")
+ ->data.patch = 1;
}
diff --git a/src/compiler/glsl/ir_set_program_inouts.cpp b/src/compiler/glsl/ir_set_program_inouts.cpp
index fcfbcd4..efb2831 100644
--- a/src/compiler/glsl/ir_set_program_inouts.cpp
+++ b/src/compiler/glsl/ir_set_program_inouts.cpp
@@ -99,7 +99,9 @@ mark(struct gl_program *prog, ir_variable *var, int offset, int len,
int idx = var->data.location + var->data.index + offset + i;
bool is_patch_generic = var->data.patch &&
idx != VARYING_SLOT_TESS_LEVEL_INNER &&
- idx != VARYING_SLOT_TESS_LEVEL_OUTER;
+ idx != VARYING_SLOT_TESS_LEVEL_OUTER &&
+ idx != VARYING_SLOT_BOUNDING_BOX0 &&
+ idx != VARYING_SLOT_BOUNDING_BOX1;
GLbitfield64 bitfield;
if (is_patch_generic) {
diff --git a/src/compiler/shader_enums.c b/src/compiler/shader_enums.c
index 00261d1..729a358 100644
--- a/src/compiler/shader_enums.c
+++ b/src/compiler/shader_enums.c
@@ -158,6 +158,8 @@ gl_varying_slot_name(gl_varying_slot slot)
ENUM(VARYING_SLOT_PNTC),
ENUM(VARYING_SLOT_TESS_LEVEL_OUTER),
ENUM(VARYING_SLOT_TESS_LEVEL_INNER),
+ ENUM(VARYING_SLOT_BOUNDING_BOX0),
+ ENUM(VARYING_SLOT_BOUNDING_BOX1),
ENUM(VARYING_SLOT_VAR0),
ENUM(VARYING_SLOT_VAR1),
ENUM(VARYING_SLOT_VAR2),
diff --git a/src/compiler/shader_enums.h b/src/compiler/shader_enums.h
index e128b17..c3a62e0 100644
--- a/src/compiler/shader_enums.h
+++ b/src/compiler/shader_enums.h
@@ -214,6 +214,8 @@ typedef enum
VARYING_SLOT_PNTC, /* FS only */
VARYING_SLOT_TESS_LEVEL_OUTER, /* Only appears as TCS output. */
VARYING_SLOT_TESS_LEVEL_INNER, /* Only appears as TCS output. */
+ VARYING_SLOT_BOUNDING_BOX0, /* Only appears as TCS output. */
+ VARYING_SLOT_BOUNDING_BOX1, /* Only appears as TCS output. */
VARYING_SLOT_VAR0, /* First generic varying slot */
/* the remaining are simply for the benefit of gl_varying_slot_name()
* and not to be construed as an upper bound:
@@ -294,6 +296,8 @@ const char *gl_varying_slot_name(gl_varying_slot slot);
#define VARYING_BIT_PNTC BITFIELD64_BIT(VARYING_SLOT_PNTC)
#define VARYING_BIT_TESS_LEVEL_OUTER BITFIELD64_BIT(VARYING_SLOT_TESS_LEVEL_OUTER)
#define VARYING_BIT_TESS_LEVEL_INNER BITFIELD64_BIT(VARYING_SLOT_TESS_LEVEL_INNER)
+#define VARYING_BIT_BOUNDING_BOX0 BITFIELD64_BIT(VARYING_SLOT_BOUNDING_BOX0)
+#define VARYING_BIT_BOUNDING_BOX1 BITFIELD64_BIT(VARYING_SLOT_BOUNDING_BOX1)
#define VARYING_BIT_VAR(V) BITFIELD64_BIT(VARYING_SLOT_VAR0 + (V))
/*@}*/
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index f8f9c46..6b8dab6 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -110,6 +110,8 @@ _mesa_varying_slot_in_fs(gl_varying_slot slot)
case VARYING_SLOT_LAYER:
case VARYING_SLOT_TESS_LEVEL_OUTER:
case VARYING_SLOT_TESS_LEVEL_INNER:
+ case VARYING_SLOT_BOUNDING_BOX0:
+ case VARYING_SLOT_BOUNDING_BOX1:
return GL_FALSE;
default:
return GL_TRUE;
@@ -3788,6 +3790,9 @@ struct gl_constants
bool LowerCsDerivedVariables; /**< Lower gl_GlobalInvocationID and
* gl_LocalInvocationIndex based on
* other builtin variables. */
+
+ /** GL_OES_primitive_bounding_box */
+ bool NoPrimitiveBoundingBoxOutput;
};
diff --git a/src/mesa/program/prog_print.c b/src/mesa/program/prog_print.c
index b8d7cca..7a7d274 100644
--- a/src/mesa/program/prog_print.c
+++ b/src/mesa/program/prog_print.c
@@ -151,6 +151,8 @@ arb_input_attrib_string(GLuint index, GLenum progType)
"fragment.(twenty-five)", /* VARYING_SLOT_TESS_LEVEL_INNER */
"fragment.(twenty-six)", /* VARYING_SLOT_CULL_DIST0 */
"fragment.(twenty-seven)", /* VARYING_SLOT_CULL_DIST1 */
+ "fragment.(twenty-eight)", /* VARYING_SLOT_BOUNDING_BOX0 */
+ "fragment.(twenty-nine)", /* VARYING_SLOT_BOUNDING_BOX1 */
"fragment.varying[0]",
"fragment.varying[1]",
"fragment.varying[2]",
@@ -280,6 +282,8 @@ arb_output_attrib_string(GLuint index, GLenum progType)
"result.(twenty-five)", /* VARYING_SLOT_TESS_LEVEL_INNER */
"result.(twenty-six)", /* VARYING_SLOT_CULL_DIST0 */
"result.(twenty-seven)", /* VARYING_SLOT_CULL_DIST1 */
+ "result.(twenty-eight)", /* VARYING_SLOT_BOUNDING_BOX0 */
+ "result.(twenty-nine)", /* VARYING_SLOT_BOUNDING_BOX1 */
"result.varying[0]",
"result.varying[1]",
"result.varying[2]",
--
2.7.3
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