From 62da6a1b3e341e53981e2817595e0eea107fe6cb Mon Sep 17 00:00:00 2001 From: Brian Date: Wed, 2 May 2007 18:44:34 -0600 Subject: Resuscitate some of the DDX,DDY code. Only works for program input registers at this time. Good enough for the common case of texcoords, though. --- src/mesa/shader/prog_execute.c | 291 +++++++---------------------------------- 1 file changed, 48 insertions(+), 243 deletions(-) (limited to 'src/mesa/shader/prog_execute.c') diff --git a/src/mesa/shader/prog_execute.c b/src/mesa/shader/prog_execute.c index 356d4ce249..9faf9d8613 100644 --- a/src/mesa/shader/prog_execute.c +++ b/src/mesa/shader/prog_execute.c @@ -218,120 +218,64 @@ fetch_vector4(const struct prog_src_register *source, } } -#if 0 + /** - * Fetch the derivative with respect to X for the given register. - * \return GL_TRUE if it was easily computed or GL_FALSE if we - * need to execute another instance of the program (ugh)! + * Fetch the derivative with respect to X or Y for the given register. + * XXX this currently only works for fragment program input attribs. */ -static GLboolean +static void fetch_vector4_deriv(GLcontext * ctx, const struct prog_src_register *source, - const SWspan * span, - char xOrY, GLint column, GLfloat result[4]) + const struct gl_program_machine *machine, + char xOrY, GLfloat result[4]) { - GLfloat src[4]; + if (source->File == PROGRAM_INPUT && source->Index < machine->NumDeriv) { + const GLint col = machine->CurElement; + const GLfloat w = machine->Attribs[FRAG_ATTRIB_WPOS][col][3]; + const GLfloat invQ = 1.0f / w; + GLfloat deriv[4]; - ASSERT(xOrY == 'X' || xOrY == 'Y'); - - switch (source->Index) { - case FRAG_ATTRIB_WPOS: if (xOrY == 'X') { - src[0] = 1.0; - src[1] = 0.0; - src[2] = span->attrStepX[FRAG_ATTRIB_WPOS][2] - / ctx->DrawBuffer->_DepthMaxF; - src[3] = span->attrStepX[FRAG_ATTRIB_WPOS][3]; + deriv[0] = machine->DerivX[source->Index][0] * invQ; + deriv[1] = machine->DerivX[source->Index][1] * invQ; + deriv[2] = machine->DerivX[source->Index][2] * invQ; + deriv[3] = machine->DerivX[source->Index][3] * invQ; } else { - src[0] = 0.0; - src[1] = 1.0; - src[2] = span->attrStepY[FRAG_ATTRIB_WPOS][2] - / ctx->DrawBuffer->_DepthMaxF; - src[3] = span->attrStepY[FRAG_ATTRIB_WPOS][3]; - } - break; - case FRAG_ATTRIB_COL0: - case FRAG_ATTRIB_COL1: - if (xOrY == 'X') { - src[0] = span->attrStepX[source->Index][0] * (1.0F / CHAN_MAXF); - src[1] = span->attrStepX[source->Index][1] * (1.0F / CHAN_MAXF); - src[2] = span->attrStepX[source->Index][2] * (1.0F / CHAN_MAXF); - src[3] = span->attrStepX[source->Index][3] * (1.0F / CHAN_MAXF); - } - else { - src[0] = span->attrStepY[source->Index][0] * (1.0F / CHAN_MAXF); - src[1] = span->attrStepY[source->Index][1] * (1.0F / CHAN_MAXF); - src[2] = span->attrStepY[source->Index][2] * (1.0F / CHAN_MAXF); - src[3] = span->attrStepY[source->Index][3] * (1.0F / CHAN_MAXF); - } - break; - case FRAG_ATTRIB_FOGC: - if (xOrY == 'X') { - src[0] = span->attrStepX[FRAG_ATTRIB_FOGC][0] * (1.0F / CHAN_MAXF); - src[1] = 0.0; - src[2] = 0.0; - src[3] = 0.0; + deriv[0] = machine->DerivY[source->Index][0] * invQ; + deriv[1] = machine->DerivY[source->Index][1] * invQ; + deriv[2] = machine->DerivY[source->Index][2] * invQ; + deriv[3] = machine->DerivY[source->Index][3] * invQ; } - else { - src[0] = span->attrStepY[FRAG_ATTRIB_FOGC][0] * (1.0F / CHAN_MAXF); - src[1] = 0.0; - src[2] = 0.0; - src[3] = 0.0; + + result[0] = deriv[GET_SWZ(source->Swizzle, 0)]; + result[1] = deriv[GET_SWZ(source->Swizzle, 1)]; + result[2] = deriv[GET_SWZ(source->Swizzle, 2)]; + result[3] = deriv[GET_SWZ(source->Swizzle, 3)]; + + if (source->NegateBase) { + result[0] = -result[0]; + result[1] = -result[1]; + result[2] = -result[2]; + result[3] = -result[3]; } - break; - default: - assert(source->Index < FRAG_ATTRIB_MAX); - /* texcoord or varying */ - if (xOrY == 'X') { - /* this is a little tricky - I think I've got it right */ - const GLfloat invQ = 1.0f / (span->attrStart[source->Index][3] - + - span->attrStepX[source->Index][3] * - column); - src[0] = span->attrStepX[source->Index][0] * invQ; - src[1] = span->attrStepX[source->Index][1] * invQ; - src[2] = span->attrStepX[source->Index][2] * invQ; - src[3] = span->attrStepX[source->Index][3] * invQ; + if (source->Abs) { + result[0] = FABSF(result[0]); + result[1] = FABSF(result[1]); + result[2] = FABSF(result[2]); + result[3] = FABSF(result[3]); } - else { - /* Tricky, as above, but in Y direction */ - const GLfloat invQ = 1.0f / (span->attrStart[source->Index][3] - + span->attrStepY[source->Index][3]); - src[0] = span->attrStepY[source->Index][0] * invQ; - src[1] = span->attrStepY[source->Index][1] * invQ; - src[2] = span->attrStepY[source->Index][2] * invQ; - src[3] = span->attrStepY[source->Index][3] * invQ; + if (source->NegateAbs) { + result[0] = -result[0]; + result[1] = -result[1]; + result[2] = -result[2]; + result[3] = -result[3]; } - break; } - - result[0] = src[GET_SWZ(source->Swizzle, 0)]; - result[1] = src[GET_SWZ(source->Swizzle, 1)]; - result[2] = src[GET_SWZ(source->Swizzle, 2)]; - result[3] = src[GET_SWZ(source->Swizzle, 3)]; - - if (source->NegateBase) { - result[0] = -result[0]; - result[1] = -result[1]; - result[2] = -result[2]; - result[3] = -result[3]; - } - if (source->Abs) { - result[0] = FABSF(result[0]); - result[1] = FABSF(result[1]); - result[2] = FABSF(result[2]); - result[3] = FABSF(result[3]); - } - if (source->NegateAbs) { - result[0] = -result[0]; - result[1] = -result[1]; - result[2] = -result[2]; - result[3] = -result[3]; + else { + ASSIGN_4V(result, 0.0, 0.0, 0.0, 0.0); } - return GL_TRUE; } -#endif /** @@ -519,106 +463,6 @@ store_vector4(const struct prog_instruction *inst, } -#if 0 -/** - * Initialize a new machine state instance from an existing one, adding - * the partial derivatives onto the input registers. - * Used to implement DDX and DDY instructions in non-trivial cases. - */ -static void -init_machine_deriv(GLcontext * ctx, - const struct gl_program_machine *machine, - const struct gl_fragment_program *program, - const SWspan * span, char xOrY, - struct gl_program_machine *dMachine) -{ - GLuint attr; - - ASSERT(xOrY == 'X' || xOrY == 'Y'); - - /* copy existing machine */ - _mesa_memcpy(dMachine, machine, sizeof(struct gl_program_machine)); - - if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) { - /* XXX also need to do this when using valgrind */ - /* Clear temporary registers (undefined for ARB_f_p) */ - _mesa_bzero((void *) machine->Temporaries, - MAX_PROGRAM_TEMPS * 4 * sizeof(GLfloat)); - } - - /* Add derivatives */ - if (program->Base.InputsRead & FRAG_BIT_WPOS) { - GLfloat *wpos = machine->Attribs[FRAG_ATTRIB_WPOS][machine->CurElement]; - if (xOrY == 'X') { - wpos[0] += 1.0F; - wpos[1] += 0.0F; - wpos[2] += span->attrStepX[FRAG_ATTRIB_WPOS][2]; - wpos[3] += span->attrStepX[FRAG_ATTRIB_WPOS][3]; - } - else { - wpos[0] += 0.0F; - wpos[1] += 1.0F; - wpos[2] += span->attrStepY[FRAG_ATTRIB_WPOS][2]; - wpos[3] += span->attrStepY[FRAG_ATTRIB_WPOS][3]; - } - } - - /* primary, secondary colors */ - for (attr = FRAG_ATTRIB_COL0; attr <= FRAG_ATTRIB_COL1; attr++) { - if (program->Base.InputsRead & (1 << attr)) { - GLfloat *col = machine->Attribs[attr][machine->CurElement]; - if (xOrY == 'X') { - col[0] += span->attrStepX[attr][0] * (1.0F / CHAN_MAXF); - col[1] += span->attrStepX[attr][1] * (1.0F / CHAN_MAXF); - col[2] += span->attrStepX[attr][2] * (1.0F / CHAN_MAXF); - col[3] += span->attrStepX[attr][3] * (1.0F / CHAN_MAXF); - } - else { - col[0] += span->attrStepY[attr][0] * (1.0F / CHAN_MAXF); - col[1] += span->attrStepY[attr][1] * (1.0F / CHAN_MAXF); - col[2] += span->attrStepY[attr][2] * (1.0F / CHAN_MAXF); - col[3] += span->attrStepY[attr][3] * (1.0F / CHAN_MAXF); - } - } - } - if (program->Base.InputsRead & FRAG_BIT_FOGC) { - GLfloat *fogc = machine->Attribs[FRAG_ATTRIB_FOGC][machine->CurElement]; - if (xOrY == 'X') { - fogc[0] += span->attrStepX[FRAG_ATTRIB_FOGC][0]; - } - else { - fogc[0] += span->attrStepY[FRAG_ATTRIB_FOGC][0]; - } - } - /* texcoord and varying vars */ - for (attr = FRAG_ATTRIB_TEX0; attr < FRAG_ATTRIB_MAX; attr++) { - if (program->Base.InputsRead & (1 << attr)) { - GLfloat *val = machine->Attribs[attr][machine->CurElement]; - /* XXX perspective-correct interpolation */ - if (xOrY == 'X') { - val[0] += span->attrStepX[attr][0]; - val[1] += span->attrStepX[attr][1]; - val[2] += span->attrStepX[attr][2]; - val[3] += span->attrStepX[attr][3]; - } - else { - val[0] += span->attrStepY[attr][0]; - val[1] += span->attrStepY[attr][1]; - val[2] += span->attrStepY[attr][2]; - val[3] += span->attrStepY[attr][3]; - } - } - } - - /* init condition codes */ - dMachine->CondCodes[0] = COND_EQ; - dMachine->CondCodes[1] = COND_EQ; - dMachine->CondCodes[2] = COND_EQ; - dMachine->CondCodes[3] = COND_EQ; -} -#endif - - /** * Execute the given vertex/fragment program. * @@ -762,57 +606,18 @@ _mesa_execute_program(GLcontext * ctx, break; case OPCODE_DDX: /* Partial derivative with respect to X */ { -#if 0 - GLfloat a[4], aNext[4], result[4]; - struct gl_program_machine dMachine; - if (!fetch_vector4_deriv(ctx, &inst->SrcReg[0], span, 'X', - column, result)) { - /* This is tricky. Make a copy of the current machine state, - * increment the input registers by the dx or dy partial - * derivatives, then re-execute the program up to the - * preceeding instruction, then fetch the source register. - * Finally, find the difference in the register values for - * the original and derivative runs. - */ - fetch_vector4(&inst->SrcReg[0], machine, program, a); - init_machine_deriv(ctx, machine, program, span, - 'X', &dMachine); - execute_program(ctx, program, pc, &dMachine, span, column); - fetch_vector4(&inst->SrcReg[0], &dMachine, program, - aNext); - result[0] = aNext[0] - a[0]; - result[1] = aNext[1] - a[1]; - result[2] = aNext[2] - a[2]; - result[3] = aNext[3] - a[3]; - } + GLfloat result[4]; + fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine, + 'X', result); store_vector4(inst, machine, result); -#else - store_vector4(inst, machine, ZeroVec); -#endif } break; case OPCODE_DDY: /* Partial derivative with respect to Y */ { -#if 0 - GLfloat a[4], aNext[4], result[4]; - struct gl_program_machine dMachine; - if (!fetch_vector4_deriv(ctx, &inst->SrcReg[0], span, 'Y', - column, result)) { - init_machine_deriv(ctx, machine, program, span, - 'Y', &dMachine); - fetch_vector4(&inst->SrcReg[0], machine, program, a); - execute_program(ctx, program, pc, &dMachine, span, column); - fetch_vector4(&inst->SrcReg[0], &dMachine, program, - aNext); - result[0] = aNext[0] - a[0]; - result[1] = aNext[1] - a[1]; - result[2] = aNext[2] - a[2]; - result[3] = aNext[3] - a[3]; - } + GLfloat result[4]; + fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine, + 'Y', result); store_vector4(inst, machine, result); -#else - store_vector4(inst, machine, ZeroVec); -#endif } break; case OPCODE_DP3: -- cgit v1.2.3