#include <string.h>
#include "srp/context.h"
#include "pipeline/interpolation.h"
#include "utils/message_callback_p.h"
#include "utils/voidptr.h"

Include dependency graph for interpolation.c:

#define	INTERPOLATE_FLOATING(Type)

#define	INTERPOLATE_INTEGER(Type)

void	interpolateDepthAndWTriangle (SRPVertexShaderOut vertices, const float weights, const float invW, const SRPShaderProgram sp, float depth, float reciprocalInterpolatedInvW)

void	interpolateDepthAndWLine (SRPVertexShaderOut vertices, const float weights, const float invW, const SRPShaderProgram sp, float depth, float reciprocalInterpolatedInvW)

void	interpolateAttributes (SRPVertexShaderOut vertices, size_t nVertices, const float weights, const float invW, float reciprocalInterpolatedInvW, const SRPShaderProgram sp, SRPInterpolated *pOutput)

Detailed Description

Interpolation implementation

Macro Definition Documentation

◆ INTERPOLATE_FLOATING

#define INTERPOLATE_FLOATING ( Type )

Value:

do { \
    elemSize = sizeof(Type); \
    Type* interpolated = (Type*) interpolatedVoid; \
    for (size_t elemI = 0; elemI < attr->nItems; elemI++) \
    { \
        Type value = 0.; \
        if (perspective) \
        { \
            for (size_t i = 0; i < nVertices; i++) \
                value += ((Type*) AV[i])[elemI] * invW[i] * weights[i]; \
            value *= reciprocalInterpolatedInvW; \
        } \
        else if (affine) \
            for (size_t i = 0; i < nVertices; i++) \
                value += ((Type*) AV[i])[elemI] * weights[i]; \
        else  /* flat */ \
            value = ((Type*) AV[provokingVertex])[elemI]; \
        interpolated[elemI] = value; \
    } \
} while(0)

Interpolate a floating point type attribute

See also: interpolateAttribute

◆ INTERPOLATE_INTEGER

#define INTERPOLATE_INTEGER ( Type )

Value:

do { \
    elemSize = sizeof(Type); \
    Type* interpolated = (Type*) interpolatedVoid; \
    memcpy(interpolated, AV[provokingVertex], elemSize * attr->nItems); \
} while(0)

Flat-interpolate an integer type attribute

See also: interpolateAttribute

Function Documentation

◆ interpolateAttributes()

void interpolateAttributes	(	SRPVertexShaderOut *	vertices,
		size_t	nVertices,
		const float *	weights,
		const float *	invW,
		float	reciprocalInterpolatedInvW,
		const SRPShaderProgram *	sp,
		SRPInterpolated *	pOutput
	)

Interpolate the attributes inside the primitive

Parameters

[in]	vertices	Array of vertices
[in]	nVertices	Amount of passed vertices
[in]	weights	Array of barycentric coordinates
[in]	invW	Array of inverseW values for each corresponding vertex
[in]	reciprocalInterpolatedInvW	The reciprocal of interpolated inverse W_clip
[in]	sp	The SRPShaderProgram being used
[out]	pOutput	Interpolated vertex attributes

◆ interpolateDepthAndWLine()

void interpolateDepthAndWLine	(	SRPVertexShaderOut *	vertices,
		const float *	weights,
		const float *	invW,
		const SRPShaderProgram *	sp,
		float *	depth,
		float *	reciprocalInterpolatedInvW
	)

Interpolate the depth and inverse W values inside the line

Parameters

[in]	vertices	Array of vertices
[in]	weights	Array of barycentric coordinates
[in]	invW	Array of inverseW values for each corresponding vertex
[in]	sp	The SRPShaderProgram being used
[out]	depth	Where interpolated depth will be stored
[out]	reciprocalInterpolatedInvW	Where the reciprocal of interpolated inverse W_clip will be stored