diff options
Diffstat (limited to 'src/gallium/auxiliary')
| -rw-r--r-- | src/gallium/auxiliary/util/u_simple_shaders.c | 51 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_simple_shaders.h | 6 |
2 files changed, 57 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_simple_shaders.c b/src/gallium/auxiliary/util/u_simple_shaders.c index 6d29cab9207..6eed33769dd 100644 --- a/src/gallium/auxiliary/util/u_simple_shaders.c +++ b/src/gallium/auxiliary/util/u_simple_shaders.c @@ -831,3 +831,54 @@ util_make_fs_msaa_resolve_bilinear(struct pipe_context *pipe, return ureg_create_shader_and_destroy(ureg, pipe); } + +void * +util_make_geometry_passthrough_shader(struct pipe_context *pipe, + uint num_attribs, + const ubyte *semantic_names, + const ubyte *semantic_indexes) +{ + static const unsigned zero[4] = {0, 0, 0, 0}; + + struct ureg_program *ureg; + struct ureg_dst dst[PIPE_MAX_SHADER_OUTPUTS]; + struct ureg_src src[PIPE_MAX_SHADER_INPUTS]; + struct ureg_src imm; + + unsigned i; + + ureg = ureg_create(TGSI_PROCESSOR_GEOMETRY); + if (ureg == NULL) + return NULL; + + ureg_property(ureg, TGSI_PROPERTY_GS_INPUT_PRIM, PIPE_PRIM_POINTS); + ureg_property(ureg, TGSI_PROPERTY_GS_OUTPUT_PRIM, PIPE_PRIM_POINTS); + ureg_property(ureg, TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES, 1); + ureg_property(ureg, TGSI_PROPERTY_GS_INVOCATIONS, 1); + imm = ureg_DECL_immediate_uint(ureg, zero, 4); + + /** + * Loop over all the attribs and declare the corresponding + * declarations in the geometry shader + */ + for (i = 0; i < num_attribs; i++) { + src[i] = ureg_DECL_input(ureg, semantic_names[i], + semantic_indexes[i], 0, 1); + src[i] = ureg_src_dimension(src[i], 0); + dst[i] = ureg_DECL_output(ureg, semantic_names[i], semantic_indexes[i]); + } + + /* MOV dst[i] src[i] */ + for (i = 0; i < num_attribs; i++) { + ureg_MOV(ureg, dst[i], src[i]); + } + + /* EMIT IMM[0] */ + ureg_insn(ureg, TGSI_OPCODE_EMIT, NULL, 0, &imm, 1); + + /* END */ + ureg_END(ureg); + + return ureg_create_shader_and_destroy(ureg, pipe); +} + diff --git a/src/gallium/auxiliary/util/u_simple_shaders.h b/src/gallium/auxiliary/util/u_simple_shaders.h index 08d798ef541..cda0f2e86ec 100644 --- a/src/gallium/auxiliary/util/u_simple_shaders.h +++ b/src/gallium/auxiliary/util/u_simple_shaders.h @@ -146,6 +146,12 @@ util_make_fs_msaa_resolve_bilinear(struct pipe_context *pipe, unsigned tgsi_tex, unsigned nr_samples, enum tgsi_return_type stype); +extern void * +util_make_geometry_passthrough_shader(struct pipe_context *pipe, + uint num_attribs, + const ubyte *semantic_names, + const ubyte *semantic_indexes); + #ifdef __cplusplus } #endif |