void GrGLNvprProgramBuilder::emitTransforms(const GrFragmentStage& processorStage,
GrGLProcessor::TransformedCoordsArray* outCoords,
GrGLInstalledFragProc* ifp) {
const GrFragmentProcessor* effect = processorStage.getProcessor();
int numTransforms = effect->numTransforms();
ifp->fTransforms.push_back_n(numTransforms);
for (int t = 0; t < numTransforms; t++) {
GrSLType varyingType =
processorStage.isPerspectiveCoordTransform(t, false) ?
kVec3f_GrSLType :
kVec2f_GrSLType;
const char* varyingName = "MatrixCoord";
SkString suffixedVaryingName;
if (0 != t) {
suffixedVaryingName.append(varyingName);
suffixedVaryingName.appendf("_%i", t);
varyingName = suffixedVaryingName.c_str();
}
GrGLVertToFrag v(varyingType);
ifp->fTransforms[t].fHandle = this->addSeparableVarying(varyingName, &v);
ifp->fTransforms[t].fType = varyingType;
SkNEW_APPEND_TO_TARRAY(outCoords, GrGLProcessor::TransformedCoords,
(SkString(v.fsIn()), varyingType));
}
}
static void get_stage_stats(const GrFragmentStage& stage, bool* readsDst, bool* readsFragPosition) {
if (stage.getFragmentProcessor()->willReadDstColor()) {
*readsDst = true;
}
if (stage.getFragmentProcessor()->willReadFragmentPosition()) {
*readsFragPosition = true;
}
}
static void get_stage_stats(const GrFragmentStage stage, bool* readsDst,
bool* readsFragPosition, bool* requiresVertexShader) {
if (stage.getProcessor()->willReadDstColor()) {
*readsDst = true;
}
if (stage.getProcessor()->willReadFragmentPosition()) {
*readsFragPosition = true;
}
}
static bool GetProcessorKey(const GrFragmentStage& fps,
const GrGLCaps& caps,
bool useLocalCoords,
GrProcessorKeyBuilder* b,
uint16_t* keySize) {
/* 0 because no attribs on a fP */
return get_meta_key(*fps.getProcessor(), caps, gen_transform_key(fps, useLocalCoords), 0,
b, keySize);
}
static uint32_t gen_transform_key(const GrFragmentStage& effectStage,
bool useExplicitLocalCoords) {
uint32_t totalKey = 0;
int numTransforms = effectStage.getProcessor()->numTransforms();
for (int t = 0; t < numTransforms; ++t) {
uint32_t key = 0;
if (effectStage.isPerspectiveCoordTransform(t, useExplicitLocalCoords)) {
key |= kGeneral_MatrixType;
} else {
key |= kNoPersp_MatrixType;
}
const GrCoordTransform& coordTransform = effectStage.getProcessor()->coordTransform(t);
if (kLocal_GrCoordSet != coordTransform.sourceCoords() && useExplicitLocalCoords) {
key |= kPositionCoords_Flag;
}
key <<= kTransformKeyBits * t;
SkASSERT(0 == (totalKey & key)); // keys for each transform ought not to overlap
totalKey |= key;
}
return totalKey;
}
