* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
for (i = 0; i < 4; i++) {
newInst[i].Opcode = OPCODE_DP4;
newInst[i].DstReg.File = PROGRAM_OUTPUT;
- newInst[i].DstReg.Index = VERT_RESULT_HPOS;
+ newInst[i].DstReg.Index = VARYING_SLOT_POS;
newInst[i].DstReg.WriteMask = (WRITEMASK_X << i);
newInst[i].SrcReg[0].File = PROGRAM_STATE_VAR;
newInst[i].SrcReg[0].Index = mvpRef[i];
vprog->Base.Instructions = newInst;
vprog->Base.NumInstructions = newLen;
vprog->Base.InputsRead |= VERT_BIT_POS;
- vprog->Base.OutputsWritten |= BITFIELD64_BIT(VERT_RESULT_HPOS);
+ vprog->Base.OutputsWritten |= BITFIELD64_BIT(VARYING_SLOT_POS);
}
newInst[3].Opcode = OPCODE_MAD;
newInst[3].DstReg.File = PROGRAM_OUTPUT;
- newInst[3].DstReg.Index = VERT_RESULT_HPOS;
+ newInst[3].DstReg.Index = VARYING_SLOT_POS;
newInst[3].DstReg.WriteMask = WRITEMASK_XYZW;
newInst[3].SrcReg[0].File = PROGRAM_INPUT;
newInst[3].SrcReg[0].Index = VERT_ATTRIB_POS;
vprog->Base.Instructions = newInst;
vprog->Base.NumInstructions = newLen;
vprog->Base.InputsRead |= VERT_BIT_POS;
- vprog->Base.OutputsWritten |= BITFIELD64_BIT(VERT_RESULT_HPOS);
+ vprog->Base.OutputsWritten |= BITFIELD64_BIT(VARYING_SLOT_POS);
}
/**
- * Append extra instructions onto the given fragment program to implement
- * the fog mode specified by fprog->FogOption.
- * The fragment.fogcoord input is used to compute the fog blend factor.
+ * Append instructions to implement fog
*
- * XXX with a little work, this function could be adapted to add fog code
+ * The \c fragment.fogcoord input is used to compute the fog blend factor.
+ *
+ * \param ctx The GL context
+ * \param fprog Fragment program that fog instructions will be appended to.
+ * \param fog_mode Fog mode. One of \c GL_EXP, \c GL_EXP2, or \c GL_LINEAR.
+ * \param saturate True if writes to color outputs should be clamped to [0, 1]
+ *
+ * \note
+ * This function sets \c VARYING_BIT_FOGC in \c fprog->Base.InputsRead.
+ *
+ * \todo With a little work, this function could be adapted to add fog code
* to vertex programs too.
*/
void
-_mesa_append_fog_code(struct gl_context *ctx, struct gl_fragment_program *fprog)
+_mesa_append_fog_code(struct gl_context *ctx,
+ struct gl_fragment_program *fprog, GLenum fog_mode,
+ GLboolean saturate)
{
static const gl_state_index fogPStateOpt[STATE_LENGTH]
= { STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0 };
GLint fogPRefOpt, fogColorRef; /* state references */
GLuint colorTemp, fogFactorTemp; /* temporary registerss */
- if (fprog->FogOption == GL_NONE) {
+ if (fog_mode == GL_NONE) {
_mesa_problem(ctx, "_mesa_append_fog_code() called for fragment program"
- " with FogOption == GL_NONE");
+ " with fog_mode == GL_NONE");
+ return;
+ }
+
+ if (!(fprog->Base.OutputsWritten & (1 << FRAG_RESULT_COLOR))) {
+ /* program doesn't output color, so nothing to do */
return;
}
/* change the instruction to write to colorTemp w/ clamping */
inst->DstReg.File = PROGRAM_TEMPORARY;
inst->DstReg.Index = colorTemp;
- inst->SaturateMode = SATURATE_ZERO_ONE;
+ inst->SaturateMode = saturate;
/* don't break (may be several writes to result.color) */
}
inst++;
_mesa_init_instructions(inst, 5);
/* emit instructions to compute fog blending factor */
- if (fprog->FogOption == GL_LINEAR) {
+ /* this is always clamped to [0, 1] regardless of fragment clamping */
+ if (fog_mode == GL_LINEAR) {
/* MAD fogFactorTemp.x, fragment.fogcoord.x, fogPRefOpt.x, fogPRefOpt.y; */
inst->Opcode = OPCODE_MAD;
inst->DstReg.File = PROGRAM_TEMPORARY;
inst->DstReg.Index = fogFactorTemp;
inst->DstReg.WriteMask = WRITEMASK_X;
inst->SrcReg[0].File = PROGRAM_INPUT;
- inst->SrcReg[0].Index = FRAG_ATTRIB_FOGC;
+ inst->SrcReg[0].Index = VARYING_SLOT_FOGC;
inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
inst->SrcReg[1].File = PROGRAM_STATE_VAR;
inst->SrcReg[1].Index = fogPRefOpt;
inst++;
}
else {
- ASSERT(fprog->FogOption == GL_EXP || fprog->FogOption == GL_EXP2);
+ ASSERT(fog_mode == GL_EXP || fog_mode == GL_EXP2);
/* fogPRefOpt.z = d/ln(2), fogPRefOpt.w = d/sqrt(ln(2) */
/* EXP: MUL fogFactorTemp.x, fogPRefOpt.z, fragment.fogcoord.x; */
/* EXP2: MUL fogFactorTemp.x, fogPRefOpt.w, fragment.fogcoord.x; */
inst->SrcReg[0].File = PROGRAM_STATE_VAR;
inst->SrcReg[0].Index = fogPRefOpt;
inst->SrcReg[0].Swizzle
- = (fprog->FogOption == GL_EXP) ? SWIZZLE_ZZZZ : SWIZZLE_WWWW;
+ = (fog_mode == GL_EXP) ? SWIZZLE_ZZZZ : SWIZZLE_WWWW;
inst->SrcReg[1].File = PROGRAM_INPUT;
- inst->SrcReg[1].Index = FRAG_ATTRIB_FOGC;
+ inst->SrcReg[1].Index = VARYING_SLOT_FOGC;
inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;
inst++;
- if (fprog->FogOption == GL_EXP2) {
+ if (fog_mode == GL_EXP2) {
/* MUL fogFactorTemp.x, fogFactorTemp.x, fogFactorTemp.x; */
inst->Opcode = OPCODE_MUL;
inst->DstReg.File = PROGRAM_TEMPORARY;
/* install new instructions */
fprog->Base.Instructions = newInst;
fprog->Base.NumInstructions = inst - newInst;
- fprog->Base.InputsRead |= FRAG_BIT_FOGC;
- /* XXX do this? fprog->FogOption = GL_NONE; */
+ fprog->Base.InputsRead |= VARYING_BIT_FOGC;
+ assert(fprog->Base.OutputsWritten & (1 << FRAG_RESULT_COLOR));
}
/**
* Scan/rewrite program to remove reads of custom (output) registers.
- * The passed type has to be either PROGRAM_OUTPUT or PROGRAM_VARYING
- * (for vertex shaders).
- * In GLSL shaders, varying vars can be read and written.
+ * The passed type has to be PROGRAM_OUTPUT.
* On some hardware, trying to read an output register causes trouble.
* So, rewrite the program to use a temporary register in this case.
*/
_mesa_remove_output_reads(struct gl_program *prog, gl_register_file type)
{
GLuint i;
- GLint outputMap[VERT_RESULT_MAX];
+ GLint outputMap[VARYING_SLOT_MAX];
GLuint numVaryingReads = 0;
GLboolean usedTemps[MAX_PROGRAM_TEMPS];
GLuint firstTemp = 0;
_mesa_find_used_registers(prog, PROGRAM_TEMPORARY,
usedTemps, MAX_PROGRAM_TEMPS);
- assert(type == PROGRAM_VARYING || type == PROGRAM_OUTPUT);
- assert(prog->Target == GL_VERTEX_PROGRAM_ARB || type != PROGRAM_VARYING);
+ assert(type == PROGRAM_OUTPUT);
- for (i = 0; i < VERT_RESULT_MAX; i++)
+ for (i = 0; i < VARYING_SLOT_MAX; i++)
outputMap[i] = -1;
/* look for instructions which read from varying vars */
/* insert new MOV instructions here */
inst = prog->Instructions + endPos;
- for (var = 0; var < VERT_RESULT_MAX; var++) {
+ for (var = 0; var < VARYING_SLOT_MAX; var++) {
if (outputMap[var] >= 0) {
/* MOV VAR[var], TEMP[tmp]; */
inst->Opcode = OPCODE_MOV;
inst[0].DstReg.File = PROGRAM_OUTPUT;
inst[0].DstReg.Index = FRAG_RESULT_COLOR;
inst[0].SrcReg[0].File = PROGRAM_INPUT;
- if (prog->Base.InputsRead & FRAG_BIT_COL0)
- inputAttr = FRAG_ATTRIB_COL0;
+ if (prog->Base.InputsRead & VARYING_BIT_COL0)
+ inputAttr = VARYING_SLOT_COL0;
else
- inputAttr = FRAG_ATTRIB_TEX0;
+ inputAttr = VARYING_SLOT_TEX0;
inst[0].SrcReg[0].Index = inputAttr;
inst[1].Opcode = OPCODE_END;
prog->Base.Instructions = inst;
prog->Base.NumInstructions = 2;
- prog->Base.InputsRead = 1 << inputAttr;
+ prog->Base.InputsRead = BITFIELD64_BIT(inputAttr);
prog->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
}
inst[0].Opcode = OPCODE_MOV;
inst[0].DstReg.File = PROGRAM_OUTPUT;
- inst[0].DstReg.Index = VERT_RESULT_COL0;
+ inst[0].DstReg.Index = VARYING_SLOT_COL0;
inst[0].SrcReg[0].File = PROGRAM_INPUT;
if (prog->Base.InputsRead & VERT_BIT_COLOR0)
inputAttr = VERT_ATTRIB_COLOR0;
prog->Base.Instructions = inst;
prog->Base.NumInstructions = 2;
- prog->Base.InputsRead = 1 << inputAttr;
- prog->Base.OutputsWritten = BITFIELD64_BIT(VERT_RESULT_COL0);
+ prog->Base.InputsRead = BITFIELD64_BIT(inputAttr);
+ prog->Base.OutputsWritten = BITFIELD64_BIT(VARYING_SLOT_COL0);
/*
* Now insert code to do standard modelview/projection transformation.
projects / mesa.git / blobdiff