GrMtlVaryingHandler.mm File Reference

#include "src/gpu/ganesh/mtl/GrMtlVaryingHandler.h"
#include "src/gpu/ganesh/mtl/GrMtlTypesPriv.h"

Go to the source code of this file.

Functions
static GR_NORETAIN_BEGIN void	finalize_helper (GrMtlVaryingHandler::VarArray &vars)

Function Documentation

finalize_helper()

static GR_NORETAIN_BEGIN void finalize_helper ( GrMtlVaryingHandler::VarArray &  vars )

static

Definition at line 18 of file GrMtlVaryingHandler.mm.

                                                               {
    int locationIndex = 0;
 
    SkDEBUGCODE(int componentCount = 0);
    for (GrShaderVar& var : vars.items()) {
        // Metal only allows scalars (including bool and char) and vectors as varyings
        SkASSERT(SkSLTypeVecLength(var.getType()) != -1);
        SkDEBUGCODE(componentCount += SkSLTypeVecLength(var.getType()));
 
        SkString location;
        location.appendf("location = %d", locationIndex);
        var.addLayoutQualifier(location.c_str());
        ++locationIndex;
    }
    // The max number of inputs is 60 for iOS and 32 for macOS. The max number of components is 60
    // for iOS and 128 for macOS. To be conservative, we are going to assert that we have less than
    // 32 varyings and less than 60 components across all varyings. If we hit this assert, we can
    // implement a function in GrMtlCaps to be less conservative.
    SkASSERT(locationIndex <= 32);
    SkASSERT(componentCount <= 60);
}