From: Keith Whitwell Date: Tue, 5 May 2009 11:12:28 +0000 (+0100) Subject: mesa: more complete fix for transform_invarient glitches X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=113403ef51e2ec764db061aabf569d6f1a1a3ef0;p=mesa.git mesa: more complete fix for transform_invarient glitches Add a new flag mvp_with_dp4 in the context, and use that to switch both ffvertex.c and programopt.c vertex transformation code to either DP4 or MUL/MAD implementations. --- diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c index 016284de9aa..d780f91f048 100644 --- a/src/mesa/main/context.c +++ b/src/mesa/main/context.c @@ -1522,4 +1522,17 @@ _mesa_Flush(void) } +/** + * Set mvp_with_dp4 flag. If a driver has a preference for DP4 over + * MUL/MAD, or vice versa, call this function to register that. + * Otherwise we default to MUL/MAD. + */ +void +_mesa_set_mvp_with_dp4( GLcontext *ctx, + GLboolean flag ) +{ + ctx->mvp_with_dp4 = flag; +} + + /*@}*/ diff --git a/src/mesa/main/context.h b/src/mesa/main/context.h index ecc1cec7799..5b57d88029c 100644 --- a/src/mesa/main/context.h +++ b/src/mesa/main/context.h @@ -151,6 +151,10 @@ extern struct _glapi_table * _mesa_get_dispatch(GLcontext *ctx); +void +_mesa_set_mvp_with_dp4( GLcontext *ctx, + GLboolean flag ); + /** \name Miscellaneous */ /*@{*/ diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c index 82e1c4af665..43325b13529 100644 --- a/src/mesa/main/ffvertex_prog.c +++ b/src/mesa/main/ffvertex_prog.c @@ -315,12 +315,6 @@ static void make_state_key( GLcontext *ctx, struct state_key *key ) */ #define DISASSEM 0 -/* Should be tunable by the driver - do we want to do matrix - * multiplications with DP4's or with MUL/MAD's? SSE works better - * with the latter, drivers may differ. - */ -#define PREFER_DP4 1 - /* Use uregs to represent registers internally, translate to Mesa's * expected formats on emit. @@ -348,6 +342,7 @@ struct tnl_program { const struct state_key *state; struct gl_vertex_program *program; GLint max_inst; /** number of instructions allocated for program */ + GLboolean mvp_with_dp4; GLuint temp_in_use; GLuint temp_reserved; @@ -775,7 +770,7 @@ static struct ureg get_eye_position( struct tnl_program *p ) p->eye_position = reserve_temp(p); - if (PREFER_DP4) { + if (p->mvp_with_dp4) { register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3, 0, modelview ); @@ -881,7 +876,7 @@ static void build_hpos( struct tnl_program *p ) struct ureg hpos = register_output( p, VERT_RESULT_HPOS ); struct ureg mvp[4]; - if (PREFER_DP4) { + if (p->mvp_with_dp4) { register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3, 0, mvp ); emit_matrix_transform_vec4( p, hpos, mvp, pos ); @@ -1574,7 +1569,7 @@ static void build_texture_transform( struct tnl_program *p ) struct ureg in = (!is_undef(out_texgen) ? out_texgen : register_input(p, VERT_ATTRIB_TEX0+i)); - if (PREFER_DP4) { + if (p->mvp_with_dp4) { register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3, 0, texmat ); emit_matrix_transform_vec4( p, out, texmat, in ); @@ -1708,6 +1703,7 @@ static void build_tnl_program( struct tnl_program *p ) static void create_new_program( const struct state_key *key, struct gl_vertex_program *program, + GLboolean mvp_with_dp4, GLuint max_temps) { struct tnl_program p; @@ -1721,6 +1717,7 @@ create_new_program( const struct state_key *key, p.transformed_normal = undef; p.identity = undef; p.temp_in_use = 0; + p.mvp_with_dp4 = mvp_with_dp4; if (max_temps >= sizeof(int) * 8) p.temp_reserved = 0; @@ -1776,6 +1773,7 @@ _mesa_get_fixed_func_vertex_program(GLcontext *ctx) return NULL; create_new_program( &key, prog, + ctx->mvp_with_dp4, ctx->Const.VertexProgram.MaxTemps ); #if 0 diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index cf710777286..587dc801466 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -2980,6 +2980,12 @@ struct __GLcontextRec /** software compression/decompression supported or not */ GLboolean Mesa_DXTn; + /** + * Use dp4 (rather than mul/mad) instructions for position + * transformation? + */ + GLboolean mvp_with_dp4; + /** Core tnl module support */ struct gl_tnl_module TnlModule; diff --git a/src/mesa/shader/programopt.c b/src/mesa/shader/programopt.c index ecd98dc85c5..f70c75cec8e 100644 --- a/src/mesa/shader/programopt.c +++ b/src/mesa/shader/programopt.c @@ -45,8 +45,8 @@ * into a vertex program. * May be used to implement the position_invariant option. */ -void -_mesa_insert_mvp_code(GLcontext *ctx, struct gl_vertex_program *vprog) +static void +_mesa_insert_mvp_dp4_code(GLcontext *ctx, struct gl_vertex_program *vprog) { struct prog_instruction *newInst; const GLuint origLen = vprog->Base.NumInstructions; @@ -113,6 +113,121 @@ _mesa_insert_mvp_code(GLcontext *ctx, struct gl_vertex_program *vprog) } +static void +_mesa_insert_mvp_mad_code(GLcontext *ctx, struct gl_vertex_program *vprog) +{ + struct prog_instruction *newInst; + const GLuint origLen = vprog->Base.NumInstructions; + const GLuint newLen = origLen + 4; + GLuint hposTemp; + GLuint i; + + /* + * Setup state references for the modelview/projection matrix. + * XXX we should check if these state vars are already declared. + */ + static const gl_state_index mvpState[4][STATE_LENGTH] = { + { STATE_MVP_MATRIX, 0, 0, 0, STATE_MATRIX_TRANSPOSE }, + { STATE_MVP_MATRIX, 0, 1, 1, STATE_MATRIX_TRANSPOSE }, + { STATE_MVP_MATRIX, 0, 2, 2, STATE_MATRIX_TRANSPOSE }, + { STATE_MVP_MATRIX, 0, 3, 3, STATE_MATRIX_TRANSPOSE }, + }; + GLint mvpRef[4]; + + for (i = 0; i < 4; i++) { + mvpRef[i] = _mesa_add_state_reference(vprog->Base.Parameters, + mvpState[i]); + } + + /* Alloc storage for new instructions */ + newInst = _mesa_alloc_instructions(newLen); + if (!newInst) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, + "glProgramString(inserting position_invariant code)"); + return; + } + + /* TEMP hposTemp; */ + hposTemp = vprog->Base.NumTemporaries++; + + /* + * Generated instructions: + * emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]); + * emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp); + * emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp); + * emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp); + */ + _mesa_init_instructions(newInst, 4); + + newInst[0].Opcode = OPCODE_MUL; + newInst[0].DstReg.File = PROGRAM_TEMPORARY; + newInst[0].DstReg.Index = hposTemp; + newInst[0].DstReg.WriteMask = WRITEMASK_XYZW; + newInst[0].SrcReg[0].File = PROGRAM_INPUT; + newInst[0].SrcReg[0].Index = VERT_ATTRIB_POS; + newInst[0].SrcReg[0].Swizzle = SWIZZLE_XXXX; + newInst[0].SrcReg[1].File = PROGRAM_STATE_VAR; + newInst[0].SrcReg[1].Index = mvpRef[0]; + newInst[0].SrcReg[1].Swizzle = SWIZZLE_NOOP; + + for (i = 1; i <= 2; i++) { + newInst[i].Opcode = OPCODE_MAD; + newInst[i].DstReg.File = PROGRAM_TEMPORARY; + newInst[i].DstReg.Index = hposTemp; + newInst[i].DstReg.WriteMask = WRITEMASK_XYZW; + newInst[i].SrcReg[0].File = PROGRAM_INPUT; + newInst[i].SrcReg[0].Index = VERT_ATTRIB_POS; + newInst[i].SrcReg[0].Swizzle = MAKE_SWIZZLE4(i,i,i,i); + newInst[i].SrcReg[1].File = PROGRAM_STATE_VAR; + newInst[i].SrcReg[1].Index = mvpRef[i]; + newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP; + newInst[i].SrcReg[2].File = PROGRAM_TEMPORARY; + newInst[i].SrcReg[2].Index = hposTemp; + newInst[1].SrcReg[2].Swizzle = SWIZZLE_NOOP; + } + + newInst[3].Opcode = OPCODE_MAD; + newInst[3].DstReg.File = PROGRAM_OUTPUT; + newInst[3].DstReg.Index = VERT_RESULT_HPOS; + newInst[3].DstReg.WriteMask = WRITEMASK_XYZW; + newInst[3].SrcReg[0].File = PROGRAM_INPUT; + newInst[3].SrcReg[0].Index = VERT_ATTRIB_POS; + newInst[3].SrcReg[0].Swizzle = SWIZZLE_WWWW; + newInst[3].SrcReg[1].File = PROGRAM_STATE_VAR; + newInst[3].SrcReg[1].Index = mvpRef[3]; + newInst[3].SrcReg[1].Swizzle = SWIZZLE_NOOP; + newInst[3].SrcReg[2].File = PROGRAM_TEMPORARY; + newInst[3].SrcReg[2].Index = hposTemp; + newInst[3].SrcReg[2].Swizzle = SWIZZLE_NOOP; + + + /* Append original instructions after new instructions */ + _mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen); + + /* free old instructions */ + _mesa_free_instructions(vprog->Base.Instructions, origLen); + + /* install new instructions */ + vprog->Base.Instructions = newInst; + vprog->Base.NumInstructions = newLen; + vprog->Base.InputsRead |= VERT_BIT_POS; + vprog->Base.OutputsWritten |= (1 << VERT_RESULT_HPOS); +} + + +void +_mesa_insert_mvp_code(GLcontext *ctx, struct gl_vertex_program *vprog) +{ + if (ctx->mvp_with_dp4) + _mesa_insert_mvp_dp4_code( ctx, vprog ); + else + _mesa_insert_mvp_mad_code( ctx, vprog ); +} + + + + + /** * Append extra instructions onto the given fragment program to implement diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c index 92a630eff97..2a1f21c51ca 100644 --- a/src/mesa/state_tracker/st_context.c +++ b/src/mesa/state_tracker/st_context.c @@ -177,6 +177,12 @@ struct st_context *st_create_context(struct pipe_context *pipe, ctx = _mesa_create_context(visual, shareCtx, &funcs, NULL); + /* XXX: need a capability bit in gallium to query if the pipe + * driver prefers DP4 or MUL/MAD for vertex transformation. + */ + if (debug_get_bool_option("MESA_MVP_DP4", FALSE)) + _mesa_set_mvp_with_dp4( ctx, GL_TRUE ); + return st_create_context_priv(ctx, pipe); }