From 23098cda9936d785988b689ee69e58e900f17cb2 Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brechtvanlommel@gmail.com>
Date: Fri, 6 Oct 2017 21:47:41 +0200
Subject: Code refactor: make texture code more consistent between devices.

* Use common TextureInfo struct for all devices, except CUDA fermi.
* Move image sampling code to kernels/*/kernel_*_image.h files.
* Use arrays for data textures on Fermi too, so device_vector<Struct> works.
---
 intern/cycles/kernel/kernel_compat_cpu.h | 449 +------------------------------
 1 file changed, 1 insertion(+), 448 deletions(-)

(limited to 'intern/cycles/kernel/kernel_compat_cpu.h')

diff --git a/intern/cycles/kernel/kernel_compat_cpu.h b/intern/cycles/kernel/kernel_compat_cpu.h
index 93934ee6b38..6f63c8f77a2 100644
--- a/intern/cycles/kernel/kernel_compat_cpu.h
+++ b/intern/cycles/kernel/kernel_compat_cpu.h
@@ -74,7 +74,7 @@ CCL_NAMESPACE_BEGIN
  * pointer lookup. */
 
 template<typename T> struct texture  {
-	ccl_always_inline T fetch(int index)
+	ccl_always_inline const T& fetch(int index)
 	{
 		kernel_assert(index >= 0 && index < width);
 		return data[index];
@@ -112,449 +112,6 @@ template<typename T> struct texture  {
 	int width;
 };
 
-template<typename T> struct texture_image  {
-#define SET_CUBIC_SPLINE_WEIGHTS(u, t) \
-	{ \
-		u[0] = (((-1.0f/6.0f)* t + 0.5f) * t - 0.5f) * t + (1.0f/6.0f); \
-		u[1] =  ((      0.5f * t - 1.0f) * t       ) * t + (2.0f/3.0f); \
-		u[2] =  ((     -0.5f * t + 0.5f) * t + 0.5f) * t + (1.0f/6.0f); \
-		u[3] = (1.0f / 6.0f) * t * t * t; \
-	} (void)0
-
-	ccl_always_inline float4 read(float4 r)
-	{
-		return r;
-	}
-
-	ccl_always_inline float4 read(uchar4 r)
-	{
-		float f = 1.0f/255.0f;
-		return make_float4(r.x*f, r.y*f, r.z*f, r.w*f);
-	}
-
-	ccl_always_inline float4 read(uchar r)
-	{
-		float f = r*(1.0f/255.0f);
-		return make_float4(f, f, f, 1.0f);
-	}
-
-	ccl_always_inline float4 read(float r)
-	{
-		/* TODO(dingto): Optimize this, so interpolation
-		 * happens on float instead of float4 */
-		return make_float4(r, r, r, 1.0f);
-	}
-
-	ccl_always_inline float4 read(half4 r)
-	{
-		return half4_to_float4(r);
-	}
-
-	ccl_always_inline float4 read(half r)
-	{
-		float f = half_to_float(r);
-		return make_float4(f, f, f, 1.0f);
-	}
-
-	ccl_always_inline int wrap_periodic(int x, int width)
-	{
-		x %= width;
-		if(x < 0)
-			x += width;
-		return x;
-	}
-
-	ccl_always_inline int wrap_clamp(int x, int width)
-	{
-		return clamp(x, 0, width-1);
-	}
-
-	ccl_always_inline float frac(float x, int *ix)
-	{
-		int i = float_to_int(x) - ((x < 0.0f)? 1: 0);
-		*ix = i;
-		return x - (float)i;
-	}
-
-	ccl_always_inline float4 interp(float x, float y)
-	{
-		if(UNLIKELY(!data))
-			return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-
-		int ix, iy, nix, niy;
-
-		if(interpolation == INTERPOLATION_CLOSEST) {
-			frac(x*(float)width, &ix);
-			frac(y*(float)height, &iy);
-			switch(extension) {
-				case EXTENSION_REPEAT:
-					ix = wrap_periodic(ix, width);
-					iy = wrap_periodic(iy, height);
-					break;
-				case EXTENSION_CLIP:
-					if(x < 0.0f || y < 0.0f || x > 1.0f || y > 1.0f) {
-						return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-					}
-					ATTR_FALLTHROUGH;
-				case EXTENSION_EXTEND:
-					ix = wrap_clamp(ix, width);
-					iy = wrap_clamp(iy, height);
-					break;
-				default:
-					kernel_assert(0);
-					return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-			}
-			return read(data[ix + iy*width]);
-		}
-		else if(interpolation == INTERPOLATION_LINEAR) {
-			float tx = frac(x*(float)width - 0.5f, &ix);
-			float ty = frac(y*(float)height - 0.5f, &iy);
-
-			switch(extension) {
-				case EXTENSION_REPEAT:
-					ix = wrap_periodic(ix, width);
-					iy = wrap_periodic(iy, height);
-
-					nix = wrap_periodic(ix+1, width);
-					niy = wrap_periodic(iy+1, height);
-					break;
-				case EXTENSION_CLIP:
-					if(x < 0.0f || y < 0.0f || x > 1.0f || y > 1.0f) {
-						return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-					}
-					ATTR_FALLTHROUGH;
-				case EXTENSION_EXTEND:
-					nix = wrap_clamp(ix+1, width);
-					niy = wrap_clamp(iy+1, height);
-
-					ix = wrap_clamp(ix, width);
-					iy = wrap_clamp(iy, height);
-					break;
-				default:
-					kernel_assert(0);
-					return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-			}
-
-			float4 r = (1.0f - ty)*(1.0f - tx)*read(data[ix + iy*width]);
-			r += (1.0f - ty)*tx*read(data[nix + iy*width]);
-			r += ty*(1.0f - tx)*read(data[ix + niy*width]);
-			r += ty*tx*read(data[nix + niy*width]);
-
-			return r;
-		}
-		else {
-			/* Bicubic b-spline interpolation. */
-			float tx = frac(x*(float)width - 0.5f, &ix);
-			float ty = frac(y*(float)height - 0.5f, &iy);
-			int pix, piy, nnix, nniy;
-			switch(extension) {
-				case EXTENSION_REPEAT:
-					ix = wrap_periodic(ix, width);
-					iy = wrap_periodic(iy, height);
-
-					pix = wrap_periodic(ix-1, width);
-					piy = wrap_periodic(iy-1, height);
-
-					nix = wrap_periodic(ix+1, width);
-					niy = wrap_periodic(iy+1, height);
-
-					nnix = wrap_periodic(ix+2, width);
-					nniy = wrap_periodic(iy+2, height);
-					break;
-				case EXTENSION_CLIP:
-					if(x < 0.0f || y < 0.0f || x > 1.0f || y > 1.0f) {
-						return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-					}
-					ATTR_FALLTHROUGH;
-				case EXTENSION_EXTEND:
-					pix = wrap_clamp(ix-1, width);
-					piy = wrap_clamp(iy-1, height);
-
-					nix = wrap_clamp(ix+1, width);
-					niy = wrap_clamp(iy+1, height);
-
-					nnix = wrap_clamp(ix+2, width);
-					nniy = wrap_clamp(iy+2, height);
-
-					ix = wrap_clamp(ix, width);
-					iy = wrap_clamp(iy, height);
-					break;
-				default:
-					kernel_assert(0);
-					return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-			}
-
-			const int xc[4] = {pix, ix, nix, nnix};
-			const int yc[4] = {width * piy,
-			                   width * iy,
-			                   width * niy,
-			                   width * nniy};
-			float u[4], v[4];
-			/* Some helper macro to keep code reasonable size,
-			 * let compiler to inline all the matrix multiplications.
-			 */
-#define DATA(x, y) (read(data[xc[x] + yc[y]]))
-#define TERM(col) \
-			(v[col] * (u[0] * DATA(0, col) + \
-			           u[1] * DATA(1, col) + \
-			           u[2] * DATA(2, col) + \
-			           u[3] * DATA(3, col)))
-
-			SET_CUBIC_SPLINE_WEIGHTS(u, tx);
-			SET_CUBIC_SPLINE_WEIGHTS(v, ty);
-
-			/* Actual interpolation. */
-			return TERM(0) + TERM(1) + TERM(2) + TERM(3);
-
-#undef TERM
-#undef DATA
-		}
-	}
-
-	ccl_always_inline float4 interp_3d(float x, float y, float z)
-	{
-		return interp_3d_ex(x, y, z, interpolation);
-	}
-
-	ccl_always_inline float4 interp_3d_ex_closest(float x, float y, float z)
-	{
-		int ix, iy, iz;
-		frac(x*(float)width, &ix);
-		frac(y*(float)height, &iy);
-		frac(z*(float)depth, &iz);
-
-		switch(extension) {
-			case EXTENSION_REPEAT:
-				ix = wrap_periodic(ix, width);
-				iy = wrap_periodic(iy, height);
-				iz = wrap_periodic(iz, depth);
-				break;
-			case EXTENSION_CLIP:
-				if(x < 0.0f || y < 0.0f || z < 0.0f ||
-				   x > 1.0f || y > 1.0f || z > 1.0f)
-				{
-					return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-				}
-				ATTR_FALLTHROUGH;
-			case EXTENSION_EXTEND:
-				ix = wrap_clamp(ix, width);
-				iy = wrap_clamp(iy, height);
-				iz = wrap_clamp(iz, depth);
-				break;
-			default:
-				kernel_assert(0);
-				return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-		}
-
-		return read(data[ix + iy*width + iz*width*height]);
-	}
-
-	ccl_always_inline float4 interp_3d_ex_linear(float x, float y, float z)
-	{
-		int ix, iy, iz;
-		int nix, niy, niz;
-
-		float tx = frac(x*(float)width - 0.5f, &ix);
-		float ty = frac(y*(float)height - 0.5f, &iy);
-		float tz = frac(z*(float)depth - 0.5f, &iz);
-
-		switch(extension) {
-			case EXTENSION_REPEAT:
-				ix = wrap_periodic(ix, width);
-				iy = wrap_periodic(iy, height);
-				iz = wrap_periodic(iz, depth);
-
-				nix = wrap_periodic(ix+1, width);
-				niy = wrap_periodic(iy+1, height);
-				niz = wrap_periodic(iz+1, depth);
-				break;
-			case EXTENSION_CLIP:
-				if(x < 0.0f || y < 0.0f || z < 0.0f ||
-				   x > 1.0f || y > 1.0f || z > 1.0f)
-				{
-					return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-				}
-				ATTR_FALLTHROUGH;
-			case EXTENSION_EXTEND:
-				nix = wrap_clamp(ix+1, width);
-				niy = wrap_clamp(iy+1, height);
-				niz = wrap_clamp(iz+1, depth);
-
-				ix = wrap_clamp(ix, width);
-				iy = wrap_clamp(iy, height);
-				iz = wrap_clamp(iz, depth);
-				break;
-			default:
-				kernel_assert(0);
-				return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-		}
-
-		float4 r;
-
-		r  = (1.0f - tz)*(1.0f - ty)*(1.0f - tx)*read(data[ix + iy*width + iz*width*height]);
-		r += (1.0f - tz)*(1.0f - ty)*tx*read(data[nix + iy*width + iz*width*height]);
-		r += (1.0f - tz)*ty*(1.0f - tx)*read(data[ix + niy*width + iz*width*height]);
-		r += (1.0f - tz)*ty*tx*read(data[nix + niy*width + iz*width*height]);
-
-		r += tz*(1.0f - ty)*(1.0f - tx)*read(data[ix + iy*width + niz*width*height]);
-		r += tz*(1.0f - ty)*tx*read(data[nix + iy*width + niz*width*height]);
-		r += tz*ty*(1.0f - tx)*read(data[ix + niy*width + niz*width*height]);
-		r += tz*ty*tx*read(data[nix + niy*width + niz*width*height]);
-
-		return r;
-	}
-
-	/* TODO(sergey): For some unspeakable reason both GCC-6 and Clang-3.9 are
-	 * causing stack overflow issue in this function unless it is inlined.
-	 *
-	 * Only happens for AVX2 kernel and global __KERNEL_SSE__ vectorization
-	 * enabled.
-	 */
-#ifdef __GNUC__
-	ccl_always_inline
-#else
-	ccl_never_inline
-#endif
-	float4 interp_3d_ex_tricubic(float x, float y, float z)
-	{
-		int ix, iy, iz;
-		int nix, niy, niz;
-		/* Tricubic b-spline interpolation. */
-		const float tx = frac(x*(float)width - 0.5f, &ix);
-		const float ty = frac(y*(float)height - 0.5f, &iy);
-		const float tz = frac(z*(float)depth - 0.5f, &iz);
-		int pix, piy, piz, nnix, nniy, nniz;
-
-		switch(extension) {
-			case EXTENSION_REPEAT:
-				ix = wrap_periodic(ix, width);
-				iy = wrap_periodic(iy, height);
-				iz = wrap_periodic(iz, depth);
-
-				pix = wrap_periodic(ix-1, width);
-				piy = wrap_periodic(iy-1, height);
-				piz = wrap_periodic(iz-1, depth);
-
-				nix = wrap_periodic(ix+1, width);
-				niy = wrap_periodic(iy+1, height);
-				niz = wrap_periodic(iz+1, depth);
-
-				nnix = wrap_periodic(ix+2, width);
-				nniy = wrap_periodic(iy+2, height);
-				nniz = wrap_periodic(iz+2, depth);
-				break;
-			case EXTENSION_CLIP:
-				if(x < 0.0f || y < 0.0f || z < 0.0f ||
-				   x > 1.0f || y > 1.0f || z > 1.0f)
-				{
-					return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-				}
-				ATTR_FALLTHROUGH;
-			case EXTENSION_EXTEND:
-				pix = wrap_clamp(ix-1, width);
-				piy = wrap_clamp(iy-1, height);
-				piz = wrap_clamp(iz-1, depth);
-
-				nix = wrap_clamp(ix+1, width);
-				niy = wrap_clamp(iy+1, height);
-				niz = wrap_clamp(iz+1, depth);
-
-				nnix = wrap_clamp(ix+2, width);
-				nniy = wrap_clamp(iy+2, height);
-				nniz = wrap_clamp(iz+2, depth);
-
-				ix = wrap_clamp(ix, width);
-				iy = wrap_clamp(iy, height);
-				iz = wrap_clamp(iz, depth);
-				break;
-			default:
-				kernel_assert(0);
-				return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-		}
-
-		const int xc[4] = {pix, ix, nix, nnix};
-		const int yc[4] = {width * piy,
-		                   width * iy,
-		                   width * niy,
-		                   width * nniy};
-		const int zc[4] = {width * height * piz,
-		                   width * height * iz,
-		                   width * height * niz,
-		                   width * height * nniz};
-		float u[4], v[4], w[4];
-
-		/* Some helper macro to keep code reasonable size,
-		 * let compiler to inline all the matrix multiplications.
-		 */
-#define DATA(x, y, z) (read(data[xc[x] + yc[y] + zc[z]]))
-#define COL_TERM(col, row) \
-		(v[col] * (u[0] * DATA(0, col, row) + \
-		           u[1] * DATA(1, col, row) + \
-		           u[2] * DATA(2, col, row) + \
-		           u[3] * DATA(3, col, row)))
-#define ROW_TERM(row) \
-		(w[row] * (COL_TERM(0, row) + \
-		           COL_TERM(1, row) + \
-		           COL_TERM(2, row) + \
-		           COL_TERM(3, row)))
-
-		SET_CUBIC_SPLINE_WEIGHTS(u, tx);
-		SET_CUBIC_SPLINE_WEIGHTS(v, ty);
-		SET_CUBIC_SPLINE_WEIGHTS(w, tz);
-
-		/* Actual interpolation. */
-		return ROW_TERM(0) + ROW_TERM(1) + ROW_TERM(2) + ROW_TERM(3);
-
-#undef COL_TERM
-#undef ROW_TERM
-#undef DATA
-	}
-
-	ccl_always_inline float4 interp_3d_ex(float x, float y, float z,
-	                                      int interpolation = INTERPOLATION_LINEAR)
-	{
-		if(UNLIKELY(!data))
-			return make_float4(0.0f, 0.0f, 0.0f, 0.0f);
-
-		switch(interpolation) {
-			case INTERPOLATION_CLOSEST:
-				return interp_3d_ex_closest(x, y, z);
-			case INTERPOLATION_LINEAR:
-				return interp_3d_ex_linear(x, y, z);
-			default:
-				return interp_3d_ex_tricubic(x, y, z);
-		}
-	}
-
-	ccl_always_inline void dimensions_set(int width_, int height_, int depth_)
-	{
-		width = width_;
-		height = height_;
-		depth = depth_;
-	}
-
-	T *data;
-	int interpolation;
-	ExtensionType extension;
-	int width, height, depth;
-#undef SET_CUBIC_SPLINE_WEIGHTS
-};
-
-typedef texture<float4> texture_float4;
-typedef texture<float2> texture_float2;
-typedef texture<float> texture_float;
-typedef texture<uint> texture_uint;
-typedef texture<int> texture_int;
-typedef texture<uint4> texture_uint4;
-typedef texture<uchar4> texture_uchar4;
-typedef texture<uchar> texture_uchar;
-typedef texture_image<float> texture_image_float;
-typedef texture_image<uchar> texture_image_uchar;
-typedef texture_image<half> texture_image_half;
-typedef texture_image<float4> texture_image_float4;
-typedef texture_image<uchar4> texture_image_uchar4;
-typedef texture_image<half4> texture_image_half4;
-
 /* Macros to handle different memory storage on different devices */
 
 #define kernel_tex_fetch(tex, index) (kg->tex.fetch(index))
@@ -563,10 +120,6 @@ typedef texture_image<half4> texture_image_half4;
 #define kernel_tex_fetch_ssei(tex, index) (kg->tex.fetch_ssei(index))
 #define kernel_tex_lookup(tex, t, offset, size) (kg->tex.lookup(t, offset, size))
 
-#define kernel_tex_image_interp(tex,x,y) kernel_tex_image_interp_impl(kg,tex,x,y)
-#define kernel_tex_image_interp_3d(tex, x, y, z) kernel_tex_image_interp_3d_impl(kg,tex,x,y,z)
-#define kernel_tex_image_interp_3d_ex(tex, x, y, z, interpolation) kernel_tex_image_interp_3d_ex_impl(kg,tex, x, y, z, interpolation)
-
 #define kernel_data (kg->__data)
 
 #ifdef __KERNEL_SSE2__
-- 
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