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-rw-r--r--third_party/webrender/swgl/src/texture.h1162
1 files changed, 72 insertions, 1090 deletions
diff --git a/third_party/webrender/swgl/src/texture.h b/third_party/webrender/swgl/src/texture.h
index fdace241eb5..0219d078bcf 100644
--- a/third_party/webrender/swgl/src/texture.h
+++ b/third_party/webrender/swgl/src/texture.h
@@ -2,884 +2,19 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-namespace glsl {
-
-using PackedRGBA8 = V16<uint8_t>;
-using WideRGBA8 = V16<uint16_t>;
-using HalfRGBA8 = V8<uint16_t>;
-
-SI WideRGBA8 unpack(PackedRGBA8 p) { return CONVERT(p, WideRGBA8); }
-
-template <int N>
-UNUSED SI VectorType<uint8_t, N> genericPackWide(VectorType<uint16_t, N> p) {
- typedef VectorType<uint8_t, N> packed_type;
- // Generic conversions only mask off the low byte without actually clamping
- // like a real pack. First force the word to all 1s if it overflows, and then
- // add on the sign bit to cause it to roll over to 0 if it was negative.
- p = (p | (p > 255)) + (p >> 15);
- return CONVERT(p, packed_type);
-}
-
-SI PackedRGBA8 pack(WideRGBA8 p) {
-#if USE_SSE2
- return _mm_packus_epi16(lowHalf(p), highHalf(p));
-#elif USE_NEON
- return vcombine_u8(vqmovn_u16(lowHalf(p)), vqmovn_u16(highHalf(p)));
-#else
- return genericPackWide(p);
-#endif
-}
-
-using PackedR8 = V4<uint8_t>;
-using WideR8 = V4<uint16_t>;
-
-SI WideR8 unpack(PackedR8 p) { return CONVERT(p, WideR8); }
-
-SI PackedR8 pack(WideR8 p) {
-#if USE_SSE2
- auto m = expand(p);
- auto r = bit_cast<V16<uint8_t>>(_mm_packus_epi16(m, m));
- return SHUFFLE(r, r, 0, 1, 2, 3);
-#elif USE_NEON
- return lowHalf(bit_cast<V8<uint8_t>>(vqmovn_u16(expand(p))));
-#else
- return genericPackWide(p);
-#endif
-}
-
-using PackedRG8 = V8<uint8_t>;
-using WideRG8 = V8<uint16_t>;
-
-SI PackedRG8 pack(WideRG8 p) {
-#if USE_SSE2
- return lowHalf(bit_cast<V16<uint8_t>>(_mm_packus_epi16(p, p)));
-#elif USE_NEON
- return bit_cast<V8<uint8_t>>(vqmovn_u16(p));
-#else
- return genericPackWide(p);
-#endif
-}
-
-SI I32 clampCoord(I32 coord, int limit, int base = 0) {
-#if USE_SSE2
- return _mm_min_epi16(_mm_max_epi16(coord, _mm_set1_epi32(base)),
- _mm_set1_epi32(limit - 1));
-#else
- return clamp(coord, base, limit - 1);
-#endif
-}
-
-SI int clampCoord(int coord, int limit, int base = 0) {
- return min(max(coord, base), limit - 1);
-}
-
-template <typename T, typename S>
-SI T clamp2D(T P, S sampler) {
- return T{clampCoord(P.x, sampler->width), clampCoord(P.y, sampler->height)};
-}
-
-SI float to_float(uint32_t x) { return x * (1.f / 255.f); }
-
-SI vec4 pixel_to_vec4(uint32_t a, uint32_t b, uint32_t c, uint32_t d) {
- U32 pixels = {a, b, c, d};
- return vec4(cast((pixels >> 16) & 0xFF), cast((pixels >> 8) & 0xFF),
- cast(pixels & 0xFF), cast(pixels >> 24)) *
- (1.0f / 255.0f);
-}
-
-SI vec4 pixel_float_to_vec4(Float a, Float b, Float c, Float d) {
- return vec4(Float{a.x, b.x, c.x, d.x}, Float{a.y, b.y, c.y, d.y},
- Float{a.z, b.z, c.z, d.z}, Float{a.w, b.w, c.w, d.w});
-}
-
-SI ivec4 pixel_int_to_ivec4(I32 a, I32 b, I32 c, I32 d) {
- return ivec4(I32{a.x, b.x, c.x, d.x}, I32{a.y, b.y, c.y, d.y},
- I32{a.z, b.z, c.z, d.z}, I32{a.w, b.w, c.w, d.w});
-}
-
-SI vec4_scalar pixel_to_vec4(uint32_t p) {
- U32 i = {(p >> 16) & 0xFF, (p >> 8) & 0xFF, p & 0xFF, p >> 24};
- Float f = cast(i) * (1.0f / 255.0f);
- return vec4_scalar(f.x, f.y, f.z, f.w);
-}
-
-template <typename S>
-SI vec4 fetchOffsetsRGBA8(S sampler, I32 offset) {
- return pixel_to_vec4(sampler->buf[offset.x], sampler->buf[offset.y],
- sampler->buf[offset.z], sampler->buf[offset.w]);
-}
-
-template <typename S>
-vec4 texelFetchRGBA8(S sampler, ivec2 P) {
- I32 offset = P.x + P.y * sampler->stride;
- return fetchOffsetsRGBA8(sampler, offset);
-}
-
-template <typename S>
-SI Float fetchOffsetsR8(S sampler, I32 offset) {
- U32 i = {
- ((uint8_t*)sampler->buf)[offset.x], ((uint8_t*)sampler->buf)[offset.y],
- ((uint8_t*)sampler->buf)[offset.z], ((uint8_t*)sampler->buf)[offset.w]};
- return cast(i) * (1.0f / 255.0f);
-}
-
-template <typename S>
-vec4 texelFetchR8(S sampler, ivec2 P) {
- I32 offset = P.x + P.y * sampler->stride;
- return vec4(fetchOffsetsR8(sampler, offset), 0.0f, 0.0f, 1.0f);
-}
-
-template <typename S>
-SI vec4 fetchOffsetsRG8(S sampler, I32 offset) {
- uint16_t* buf = (uint16_t*)sampler->buf;
- U16 pixels = {buf[offset.x], buf[offset.y], buf[offset.z], buf[offset.w]};
- Float r = CONVERT(pixels & 0xFF, Float) * (1.0f / 255.0f);
- Float g = CONVERT(pixels >> 8, Float) * (1.0f / 255.0f);
- return vec4(r, g, 0.0f, 1.0f);
-}
-
-template <typename S>
-vec4 texelFetchRG8(S sampler, ivec2 P) {
- I32 offset = P.x + P.y * sampler->stride;
- return fetchOffsetsRG8(sampler, offset);
-}
-
template <typename S>
-SI Float fetchOffsetsR16(S sampler, I32 offset) {
- U32 i = {
- ((uint16_t*)sampler->buf)[offset.x], ((uint16_t*)sampler->buf)[offset.y],
- ((uint16_t*)sampler->buf)[offset.z], ((uint16_t*)sampler->buf)[offset.w]};
- return cast(i) * (1.0f / 65535.0f);
-}
-
-template <typename S>
-vec4 texelFetchR16(S sampler, ivec2 P) {
- I32 offset = P.x + P.y * sampler->stride;
- return vec4(fetchOffsetsR16(sampler, offset), 0.0f, 0.0f, 1.0f);
-}
-
-template <typename S>
-SI vec4 fetchOffsetsFloat(S sampler, I32 offset) {
- return pixel_float_to_vec4(
- *(Float*)&sampler->buf[offset.x], *(Float*)&sampler->buf[offset.y],
- *(Float*)&sampler->buf[offset.z], *(Float*)&sampler->buf[offset.w]);
-}
-
-vec4 texelFetchFloat(sampler2D sampler, ivec2 P) {
- I32 offset = P.x * 4 + P.y * sampler->stride;
- return fetchOffsetsFloat(sampler, offset);
-}
-
-template <typename S>
-SI vec4 fetchOffsetsYUV422(S sampler, I32 offset) {
- // Layout is 2 pixel chunks (occupying 4 bytes) organized as: G0, B, G1, R.
- // Offset is aligned to a chunk rather than a pixel, and selector specifies
- // pixel within the chunk.
- I32 selector = offset & 1;
- offset &= ~1;
- uint16_t* buf = (uint16_t*)sampler->buf;
- U32 pixels = {*(uint32_t*)&buf[offset.x], *(uint32_t*)&buf[offset.y],
- *(uint32_t*)&buf[offset.z], *(uint32_t*)&buf[offset.w]};
- Float b = CONVERT((pixels >> 8) & 0xFF, Float) * (1.0f / 255.0f);
- Float r = CONVERT((pixels >> 24), Float) * (1.0f / 255.0f);
- Float g =
- CONVERT(if_then_else(-selector, pixels >> 16, pixels) & 0xFF, Float) *
- (1.0f / 255.0f);
- return vec4(r, g, b, 1.0f);
-}
-
-template <typename S>
-vec4 texelFetchYUV422(S sampler, ivec2 P) {
- I32 offset = P.x + P.y * sampler->stride;
- return fetchOffsetsYUV422(sampler, offset);
-}
-
-vec4 texelFetch(sampler2D sampler, ivec2 P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- switch (sampler->format) {
- case TextureFormat::RGBA32F:
- return texelFetchFloat(sampler, P);
- case TextureFormat::RGBA8:
- return texelFetchRGBA8(sampler, P);
- case TextureFormat::R8:
- return texelFetchR8(sampler, P);
- case TextureFormat::RG8:
- return texelFetchRG8(sampler, P);
- case TextureFormat::R16:
- return texelFetchR16(sampler, P);
- case TextureFormat::YUV422:
- return texelFetchYUV422(sampler, P);
- default:
- assert(false);
- return vec4();
- }
-}
-
-vec4 texelFetch(sampler2DRGBA32F sampler, ivec2 P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::RGBA32F);
- return texelFetchFloat(sampler, P);
-}
-
-vec4 texelFetch(sampler2DRGBA8 sampler, ivec2 P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
+static PackedRGBA8 textureLinearPackedRGBA8(S sampler, ivec2 i, int zoffset) {
assert(sampler->format == TextureFormat::RGBA8);
- return texelFetchRGBA8(sampler, P);
-}
-
-vec4 texelFetch(sampler2DR8 sampler, ivec2 P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::R8);
- return texelFetchR8(sampler, P);
-}
-
-vec4 texelFetch(sampler2DRG8 sampler, ivec2 P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::RG8);
- return texelFetchRG8(sampler, P);
-}
-
-vec4_scalar texelFetch(sampler2D sampler, ivec2_scalar P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- if (sampler->format == TextureFormat::RGBA32F) {
- return *(vec4_scalar*)&sampler->buf[P.x * 4 + P.y * sampler->stride];
- } else {
- assert(sampler->format == TextureFormat::RGBA8);
- return pixel_to_vec4(sampler->buf[P.x + P.y * sampler->stride]);
- }
-}
-
-vec4_scalar texelFetch(sampler2DRGBA32F sampler, ivec2_scalar P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::RGBA32F);
- return *(vec4_scalar*)&sampler->buf[P.x * 4 + P.y * sampler->stride];
-}
-
-vec4_scalar texelFetch(sampler2DRGBA8 sampler, ivec2_scalar P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::RGBA8);
- return pixel_to_vec4(sampler->buf[P.x + P.y * sampler->stride]);
-}
-
-vec4_scalar texelFetch(sampler2DR8 sampler, ivec2_scalar P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::R8);
- return vec4_scalar{
- to_float(((uint8_t*)sampler->buf)[P.x + P.y * sampler->stride]), 0.0f,
- 0.0f, 1.0f};
-}
-
-vec4_scalar texelFetch(sampler2DRG8 sampler, ivec2_scalar P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::RG8);
- uint16_t pixel = ((uint16_t*)sampler->buf)[P.x + P.y * sampler->stride];
- return vec4_scalar{to_float(pixel & 0xFF), to_float(pixel >> 8), 0.0f, 1.0f};
-}
-
-vec4 texelFetch(sampler2DRect sampler, ivec2 P) {
- P = clamp2D(P, sampler);
- switch (sampler->format) {
- case TextureFormat::RGBA8:
- return texelFetchRGBA8(sampler, P);
- case TextureFormat::R8:
- return texelFetchR8(sampler, P);
- case TextureFormat::RG8:
- return texelFetchRG8(sampler, P);
- case TextureFormat::R16:
- return texelFetchR16(sampler, P);
- case TextureFormat::YUV422:
- return texelFetchYUV422(sampler, P);
- default:
- assert(false);
- return vec4();
- }
-}
-
-template <typename S>
-SI ivec4 fetchOffsetsInt(S sampler, I32 offset) {
- return pixel_int_to_ivec4(
- *(I32*)&sampler->buf[offset.x], *(I32*)&sampler->buf[offset.y],
- *(I32*)&sampler->buf[offset.z], *(I32*)&sampler->buf[offset.w]);
-}
-
-ivec4 texelFetch(isampler2D sampler, ivec2 P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::RGBA32I);
- I32 offset = P.x * 4 + P.y * sampler->stride;
- return fetchOffsetsInt(sampler, offset);
-}
-
-ivec4_scalar texelFetch(isampler2D sampler, ivec2_scalar P, int lod) {
- assert(lod == 0);
- P = clamp2D(P, sampler);
- assert(sampler->format == TextureFormat::RGBA32I);
- return *(ivec4_scalar*)&sampler->buf[P.x * 4 + P.y * sampler->stride];
-}
-
-SI vec4_scalar* texelFetchPtr(sampler2D sampler, ivec2_scalar P, int min_x,
- int max_x, int min_y, int max_y) {
- P.x = min(max(P.x, -min_x), int(sampler->width) - 1 - max_x);
- P.y = min(max(P.y, -min_y), int(sampler->height) - 1 - max_y);
- assert(sampler->format == TextureFormat::RGBA32F);
- return (vec4_scalar*)&sampler->buf[P.x * 4 + P.y * sampler->stride];
-}
-
-SI ivec4_scalar* texelFetchPtr(isampler2D sampler, ivec2_scalar P, int min_x,
- int max_x, int min_y, int max_y) {
- P.x = min(max(P.x, -min_x), int(sampler->width) - 1 - max_x);
- P.y = min(max(P.y, -min_y), int(sampler->height) - 1 - max_y);
- assert(sampler->format == TextureFormat::RGBA32I);
- return (ivec4_scalar*)&sampler->buf[P.x * 4 + P.y * sampler->stride];
-}
-
-template <typename S>
-SI I32 texelFetchPtr(S sampler, ivec2 P, int min_x, int max_x, int min_y,
- int max_y) {
- P.x = clampCoord(P.x, int(sampler->width) - max_x, -min_x);
- P.y = clampCoord(P.y, int(sampler->height) - max_y, -min_y);
- return P.x * 4 + P.y * sampler->stride;
-}
-
-template <typename S, typename P>
-SI P texelFetchUnchecked(S sampler, P* ptr, int x, int y = 0) {
- return ptr[x + y * (sampler->stride >> 2)];
-}
-
-SI vec4 texelFetchUnchecked(sampler2D sampler, I32 offset, int x, int y = 0) {
- assert(sampler->format == TextureFormat::RGBA32F);
- return fetchOffsetsFloat(sampler, offset + (x * 4 + y * sampler->stride));
-}
-
-SI ivec4 texelFetchUnchecked(isampler2D sampler, I32 offset, int x, int y = 0) {
- assert(sampler->format == TextureFormat::RGBA32I);
- return fetchOffsetsInt(sampler, offset + (x * 4 + y * sampler->stride));
-}
-
-#define texelFetchOffset(sampler, P, lod, offset) \
- texelFetch(sampler, (P) + (offset), lod)
-
-// Scale texture coords for quantization, subtract offset for filtering
-// (assuming coords already offset to texel centers), and round to nearest
-// 1/scale increment
-template <typename T>
-SI T linearQuantize(T P, float scale) {
- return P * scale + (0.5f - 0.5f * scale);
-}
-
-// Helper version that also scales normalized texture coords for sampler
-template <typename T, typename S>
-SI T samplerScale(S sampler, T P) {
- P.x *= sampler->width;
- P.y *= sampler->height;
- return P;
-}
-
-template <typename T>
-SI T samplerScale(UNUSED sampler2DRect sampler, T P) {
- return P;
-}
-
-template <typename T, typename S>
-SI T linearQuantize(T P, float scale, S sampler) {
- return linearQuantize(samplerScale(sampler, P), scale);
-}
-
-// Compute clamped offset of first row for linear interpolation
-template <typename S, typename I>
-SI auto computeRow(S sampler, I i, size_t margin = 1) -> decltype(i.x) {
- return clampCoord(i.x, sampler->width - margin) +
- clampCoord(i.y, sampler->height) * sampler->stride;
-}
-
-// Compute clamped offset of second row for linear interpolation from first row
-template <typename S, typename I>
-SI auto computeNextRowOffset(S sampler, I i) -> decltype(i.x) {
- return if_then_else(i.y >= 0 && i.y < int32_t(sampler->height) - 1,
- sampler->stride, 0);
-}
-
-// Convert X coordinate to a 2^7 scale fraction for interpolation
-template <typename S>
-SI I16 computeFracX(S sampler, ivec2 i, ivec2 frac) {
- auto overread = i.x > int32_t(sampler->width) - 2;
- return CONVERT((((frac.x & (i.x >= 0)) | overread) & 0x7F) - overread, I16);
-}
-
-// Convert Y coordinate to a 2^7 scale fraction for interpolation
-SI I16 computeFracNoClamp(I32 frac) { return CONVERT(frac & 0x7F, I16); }
-SI I16 computeFracY(ivec2 frac) { return computeFracNoClamp(frac.y); }
-
-struct WidePlanarRGBA8 {
- V8<uint16_t> rg;
- V8<uint16_t> ba;
-};
-
-template <typename S>
-SI WidePlanarRGBA8 textureLinearPlanarRGBA8(S sampler, ivec2 i) {
- assert(sampler->format == TextureFormat::RGBA8);
-
- ivec2 frac = i;
- i >>= 7;
-
- I32 row0 = computeRow(sampler, i);
- I32 row1 = row0 + computeNextRowOffset(sampler, i);
- I16 fracx = computeFracX(sampler, i, frac);
- I16 fracy = computeFracY(frac);
-
- auto a0 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row0.x]), V8<int16_t>);
- auto a1 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row1.x]), V8<int16_t>);
- a0 += ((a1 - a0) * fracy.x) >> 7;
-
- auto b0 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row0.y]), V8<int16_t>);
- auto b1 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row1.y]), V8<int16_t>);
- b0 += ((b1 - b0) * fracy.y) >> 7;
-
- auto abl = zipLow(a0, b0);
- auto abh = zipHigh(a0, b0);
- abl += ((abh - abl) * fracx.xyxyxyxy) >> 7;
-
- auto c0 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row0.z]), V8<int16_t>);
- auto c1 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row1.z]), V8<int16_t>);
- c0 += ((c1 - c0) * fracy.z) >> 7;
-
- auto d0 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row0.w]), V8<int16_t>);
- auto d1 =
- CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row1.w]), V8<int16_t>);
- d0 += ((d1 - d0) * fracy.w) >> 7;
-
- auto cdl = zipLow(c0, d0);
- auto cdh = zipHigh(c0, d0);
- cdl += ((cdh - cdl) * fracx.zwzwzwzw) >> 7;
-
- auto rg = V8<uint16_t>(zip2Low(abl, cdl));
- auto ba = V8<uint16_t>(zip2High(abl, cdl));
- return WidePlanarRGBA8{rg, ba};
-}
-
-template <typename S>
-vec4 textureLinearRGBA8(S sampler, vec2 P) {
- ivec2 i(linearQuantize(P, 128, sampler));
- auto planar = textureLinearPlanarRGBA8(sampler, i);
- auto rg = CONVERT(planar.rg, V8<float>);
- auto ba = CONVERT(planar.ba, V8<float>);
- auto r = lowHalf(rg);
- auto g = highHalf(rg);
- auto b = lowHalf(ba);
- auto a = highHalf(ba);
- return vec4(b, g, r, a) * (1.0f / 255.0f);
-}
-
-template <typename S>
-static inline U16 textureLinearUnpackedR8(S sampler, ivec2 i) {
- assert(sampler->format == TextureFormat::R8);
- ivec2 frac = i;
- i >>= 7;
-
- I32 row0 = computeRow(sampler, i);
- I32 row1 = row0 + computeNextRowOffset(sampler, i);
- I16 fracx = computeFracX(sampler, i, frac);
- I16 fracy = computeFracY(frac);
-
- uint8_t* buf = (uint8_t*)sampler->buf;
- auto a0 = unaligned_load<V2<uint8_t>>(&buf[row0.x]);
- auto b0 = unaligned_load<V2<uint8_t>>(&buf[row0.y]);
- auto c0 = unaligned_load<V2<uint8_t>>(&buf[row0.z]);
- auto d0 = unaligned_load<V2<uint8_t>>(&buf[row0.w]);
- auto abcd0 = CONVERT(combine(a0, b0, c0, d0), V8<int16_t>);
-
- auto a1 = unaligned_load<V2<uint8_t>>(&buf[row1.x]);
- auto b1 = unaligned_load<V2<uint8_t>>(&buf[row1.y]);
- auto c1 = unaligned_load<V2<uint8_t>>(&buf[row1.z]);
- auto d1 = unaligned_load<V2<uint8_t>>(&buf[row1.w]);
- auto abcd1 = CONVERT(combine(a1, b1, c1, d1), V8<int16_t>);
-
- abcd0 += ((abcd1 - abcd0) * fracy.xxyyzzww) >> 7;
-
- abcd0 = SHUFFLE(abcd0, abcd0, 0, 2, 4, 6, 1, 3, 5, 7);
- auto abcdl = lowHalf(abcd0);
- auto abcdh = highHalf(abcd0);
- abcdl += ((abcdh - abcdl) * fracx) >> 7;
-
- return U16(abcdl);
-}
-
-template <typename S>
-vec4 textureLinearR8(S sampler, vec2 P) {
- assert(sampler->format == TextureFormat::R8);
-
- ivec2 i(linearQuantize(P, 128, sampler));
- Float r = CONVERT(textureLinearUnpackedR8(sampler, i), Float);
- return vec4(r * (1.0f / 255.0f), 0.0f, 0.0f, 1.0f);
-}
-
-struct WidePlanarRG8 {
- V8<uint16_t> rg;
-};
-
-template <typename S>
-SI WidePlanarRG8 textureLinearPlanarRG8(S sampler, ivec2 i) {
- assert(sampler->format == TextureFormat::RG8);
-
- ivec2 frac = i;
- i >>= 7;
-
- I32 row0 = computeRow(sampler, i);
- I32 row1 = row0 + computeNextRowOffset(sampler, i);
- I16 fracx = computeFracX(sampler, i, frac);
- I16 fracy = computeFracY(frac);
-
- uint16_t* buf = (uint16_t*)sampler->buf;
-
- // Load RG bytes for two adjacent pixels - rgRG
- auto a0 = unaligned_load<V4<uint8_t>>(&buf[row0.x]);
- auto b0 = unaligned_load<V4<uint8_t>>(&buf[row0.y]);
- auto ab0 = CONVERT(combine(a0, b0), V8<int16_t>);
- // Load two pixels for next row
- auto a1 = unaligned_load<V4<uint8_t>>(&buf[row1.x]);
- auto b1 = unaligned_load<V4<uint8_t>>(&buf[row1.y]);
- auto ab1 = CONVERT(combine(a1, b1), V8<int16_t>);
- // Blend rows
- ab0 += ((ab1 - ab0) * fracy.xxxxyyyy) >> 7;
-
- auto c0 = unaligned_load<V4<uint8_t>>(&buf[row0.z]);
- auto d0 = unaligned_load<V4<uint8_t>>(&buf[row0.w]);
- auto cd0 = CONVERT(combine(c0, d0), V8<int16_t>);
- auto c1 = unaligned_load<V4<uint8_t>>(&buf[row1.z]);
- auto d1 = unaligned_load<V4<uint8_t>>(&buf[row1.w]);
- auto cd1 = CONVERT(combine(c1, d1), V8<int16_t>);
- // Blend rows
- cd0 += ((cd1 - cd0) * fracy.zzzzwwww) >> 7;
-
- // ab = a.rgRG,b.rgRG
- // cd = c.rgRG,d.rgRG
- // ... ac = ar,cr,ag,cg,aR,cR,aG,cG
- // ... bd = br,dr,bg,dg,bR,dR,bG,dG
- auto ac = zipLow(ab0, cd0);
- auto bd = zipHigh(ab0, cd0);
- // ar,br,cr,dr,ag,bg,cg,dg
- // aR,bR,cR,dR,aG,bG,cG,dG
- auto abcdl = zipLow(ac, bd);
- auto abcdh = zipHigh(ac, bd);
- // Blend columns
- abcdl += ((abcdh - abcdl) * fracx.xyzwxyzw) >> 7;
-
- auto rg = V8<uint16_t>(abcdl);
- return WidePlanarRG8{rg};
-}
-
-template <typename S>
-vec4 textureLinearRG8(S sampler, vec2 P) {
- ivec2 i(linearQuantize(P, 128, sampler));
- auto planar = textureLinearPlanarRG8(sampler, i);
- auto rg = CONVERT(planar.rg, V8<float>) * (1.0f / 255.0f);
- auto r = lowHalf(rg);
- auto g = highHalf(rg);
- return vec4(r, g, 0.0f, 1.0f);
-}
-
-// Samples R16 texture with linear filtering and returns results packed as
-// signed I16. One bit of precision is shifted away from the bottom end to
-// accommodate the sign bit, so only 15 bits of precision is left.
-template <typename S>
-static inline I16 textureLinearUnpackedR16(S sampler, ivec2 i) {
- assert(sampler->format == TextureFormat::R16);
-
- ivec2 frac = i;
+ ivec2 frac = i & 0x7F;
i >>= 7;
- I32 row0 = computeRow(sampler, i);
- I32 row1 = row0 + computeNextRowOffset(sampler, i);
-
+ I32 row0 = clampCoord(i.x, sampler->width) +
+ clampCoord(i.y, sampler->height) * sampler->stride + zoffset;
+ I32 row1 = row0 + ((i.y >= 0 && i.y < int32_t(sampler->height) - 1) &
+ I32(sampler->stride));
I16 fracx =
- CONVERT(
- ((frac.x & (i.x >= 0)) | (i.x > int32_t(sampler->width) - 2)) & 0x7F,
- I16)
- << 8;
- I16 fracy = computeFracY(frac) << 8;
-
- // Sample the 16 bit data for both rows
- uint16_t* buf = (uint16_t*)sampler->buf;
- auto a0 = unaligned_load<V2<uint16_t>>(&buf[row0.x]);
- auto b0 = unaligned_load<V2<uint16_t>>(&buf[row0.y]);
- auto c0 = unaligned_load<V2<uint16_t>>(&buf[row0.z]);
- auto d0 = unaligned_load<V2<uint16_t>>(&buf[row0.w]);
- auto abcd0 = CONVERT(combine(a0, b0, c0, d0) >> 1, V8<int16_t>);
-
- auto a1 = unaligned_load<V2<uint16_t>>(&buf[row1.x]);
- auto b1 = unaligned_load<V2<uint16_t>>(&buf[row1.y]);
- auto c1 = unaligned_load<V2<uint16_t>>(&buf[row1.z]);
- auto d1 = unaligned_load<V2<uint16_t>>(&buf[row1.w]);
- auto abcd1 = CONVERT(combine(a1, b1, c1, d1) >> 1, V8<int16_t>);
-
- // The samples occupy 15 bits and the fraction occupies 15 bits, so that when
- // they are multiplied together, the new scaled sample will fit in the high
- // 14 bits of the result. It is left shifted once to make it 15 bits again
- // for the final multiply.
-#if USE_SSE2
- abcd0 += bit_cast<V8<int16_t>>(_mm_mulhi_epi16(abcd1 - abcd0, fracy.xxyyzzww))
- << 1;
-#elif USE_NEON
- // NEON has a convenient instruction that does both the multiply and the
- // doubling, so doesn't need an extra shift.
- abcd0 += bit_cast<V8<int16_t>>(vqrdmulhq_s16(abcd1 - abcd0, fracy.xxyyzzww));
-#else
- abcd0 += CONVERT((CONVERT(abcd1 - abcd0, V8<int32_t>) *
- CONVERT(fracy.xxyyzzww, V8<int32_t>)) >>
- 16,
- V8<int16_t>)
- << 1;
-#endif
-
- abcd0 = SHUFFLE(abcd0, abcd0, 0, 2, 4, 6, 1, 3, 5, 7);
- auto abcdl = lowHalf(abcd0);
- auto abcdh = highHalf(abcd0);
-#if USE_SSE2
- abcdl += lowHalf(bit_cast<V8<int16_t>>(
- _mm_mulhi_epi16(expand(abcdh - abcdl), expand(fracx))))
- << 1;
-#elif USE_NEON
- abcdl += bit_cast<V4<int16_t>>(vqrdmulh_s16(abcdh - abcdl, fracx));
-#else
- abcdl += CONVERT((CONVERT(abcdh - abcdl, V4<int32_t>) *
- CONVERT(fracx, V4<int32_t>)) >>
- 16,
- V4<int16_t>)
- << 1;
-#endif
-
- return abcdl;
-}
-
-template <typename S>
-vec4 textureLinearR16(S sampler, vec2 P) {
- assert(sampler->format == TextureFormat::R16);
-
- ivec2 i(linearQuantize(P, 128, sampler));
- Float r = CONVERT(textureLinearUnpackedR16(sampler, i), Float);
- return vec4(r * (1.0f / 32767.0f), 0.0f, 0.0f, 1.0f);
-}
-
-using PackedRGBA32F = V16<float>;
-using WideRGBA32F = V16<float>;
-
-template <typename S>
-vec4 textureLinearRGBA32F(S sampler, vec2 P) {
- assert(sampler->format == TextureFormat::RGBA32F);
- P = samplerScale(sampler, P);
- P -= 0.5f;
- vec2 f = floor(P);
- vec2 r = P - f;
- ivec2 i(f);
- ivec2 c(clampCoord(i.x, sampler->width - 1),
- clampCoord(i.y, sampler->height));
- r.x = if_then_else(i.x >= 0, if_then_else(i.x < sampler->width - 1, r.x, 1.0),
- 0.0f);
- I32 offset0 = c.x * 4 + c.y * sampler->stride;
- I32 offset1 = offset0 + computeNextRowOffset(sampler, i);
-
- Float c0 = mix(mix(*(Float*)&sampler->buf[offset0.x],
- *(Float*)&sampler->buf[offset0.x + 4], r.x),
- mix(*(Float*)&sampler->buf[offset1.x],
- *(Float*)&sampler->buf[offset1.x + 4], r.x),
- r.y);
- Float c1 = mix(mix(*(Float*)&sampler->buf[offset0.y],
- *(Float*)&sampler->buf[offset0.y + 4], r.x),
- mix(*(Float*)&sampler->buf[offset1.y],
- *(Float*)&sampler->buf[offset1.y + 4], r.x),
- r.y);
- Float c2 = mix(mix(*(Float*)&sampler->buf[offset0.z],
- *(Float*)&sampler->buf[offset0.z + 4], r.x),
- mix(*(Float*)&sampler->buf[offset1.z],
- *(Float*)&sampler->buf[offset1.z + 4], r.x),
- r.y);
- Float c3 = mix(mix(*(Float*)&sampler->buf[offset0.w],
- *(Float*)&sampler->buf[offset0.w + 4], r.x),
- mix(*(Float*)&sampler->buf[offset1.w],
- *(Float*)&sampler->buf[offset1.w + 4], r.x),
- r.y);
- return pixel_float_to_vec4(c0, c1, c2, c3);
-}
-
-struct WidePlanarYUV8 {
- U16 y;
- U16 u;
- U16 v;
-};
-
-template <typename S>
-SI WidePlanarYUV8 textureLinearPlanarYUV422(S sampler, ivec2 i) {
- assert(sampler->format == TextureFormat::YUV422);
-
- ivec2 frac = i;
- i >>= 7;
-
- I32 row0 = computeRow(sampler, i, 2);
- // Layout is 2 pixel chunks (occupying 4 bytes) organized as: G0, B, G1, R.
- // Get the selector for the pixel within the chunk.
- I32 selector = row0 & 1;
- // Align the row index to the chunk.
- row0 &= ~1;
- I32 row1 = row0 + computeNextRowOffset(sampler, i);
- // G only needs to be clamped to a pixel boundary for safe interpolation,
- // whereas the BR fraction needs to be clamped 1 extra pixel inside to a chunk
- // boundary.
- frac.x &= (i.x >= 0);
- auto fracx =
- CONVERT(combine(frac.x | (i.x > int32_t(sampler->width) - 3),
- (frac.x >> 1) | (i.x > int32_t(sampler->width) - 3)) &
- 0x7F,
- V8<int16_t>);
- I16 fracy = computeFracY(frac);
-
- uint16_t* buf = (uint16_t*)sampler->buf;
-
- // Load bytes for two adjacent chunks - g0,b,g1,r,G0,B,G1,R
- // We always need to interpolate between (b,r) and (B,R).
- // Depending on selector we need to either interpolate between g0 and g1
- // or between g1 and G0. So for now we just interpolate both cases for g
- // and will select the appropriate one on output.
- auto a0 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row0.x]), V8<int16_t>);
- auto a1 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row1.x]), V8<int16_t>);
- // Combine with next row.
- a0 += ((a1 - a0) * fracy.x) >> 7;
-
- auto b0 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row0.y]), V8<int16_t>);
- auto b1 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row1.y]), V8<int16_t>);
- b0 += ((b1 - b0) * fracy.y) >> 7;
-
- auto c0 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row0.z]), V8<int16_t>);
- auto c1 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row1.z]), V8<int16_t>);
- c0 += ((c1 - c0) * fracy.z) >> 7;
-
- auto d0 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row0.w]), V8<int16_t>);
- auto d1 = CONVERT(unaligned_load<V8<uint8_t>>(&buf[row1.w]), V8<int16_t>);
- d0 += ((d1 - d0) * fracy.w) >> 7;
-
- // Shuffle things around so we end up with g0,g0,g0,g0,b,b,b,b and
- // g1,g1,g1,g1,r,r,r,r.
- auto abl = zipLow(a0, b0);
- auto cdl = zipLow(c0, d0);
- auto g0b = zip2Low(abl, cdl);
- auto g1r = zip2High(abl, cdl);
-
- // Need to zip g1,B,G0,R. Instead of using a bunch of complicated masks and
- // and shifts, just shuffle here instead... We finally end up with
- // g1,g1,g1,g1,B,B,B,B and G0,G0,G0,G0,R,R,R,R.
- auto abh = SHUFFLE(a0, b0, 2, 10, 5, 13, 4, 12, 7, 15);
- auto cdh = SHUFFLE(c0, d0, 2, 10, 5, 13, 4, 12, 7, 15);
- auto g1B = zip2Low(abh, cdh);
- auto G0R = zip2High(abh, cdh);
-
- // Finally interpolate between adjacent columns.
- g0b += ((g1B - g0b) * fracx) >> 7;
- g1r += ((G0R - g1r) * fracx) >> 7;
-
- // Choose either g0 or g1 based on selector.
- return WidePlanarYUV8{
- U16(if_then_else(CONVERT(-selector, I16), lowHalf(g1r), lowHalf(g0b))),
- U16(highHalf(g0b)), U16(highHalf(g1r))};
-}
-
-template <typename S>
-vec4 textureLinearYUV422(S sampler, vec2 P) {
- ivec2 i(linearQuantize(P, 128, sampler));
- auto planar = textureLinearPlanarYUV422(sampler, i);
- auto y = CONVERT(planar.y, Float) * (1.0f / 255.0f);
- auto u = CONVERT(planar.u, Float) * (1.0f / 255.0f);
- auto v = CONVERT(planar.v, Float) * (1.0f / 255.0f);
- return vec4(v, y, u, 1.0f);
-}
-
-SI vec4 texture(sampler2D sampler, vec2 P) {
- if (sampler->filter == TextureFilter::LINEAR) {
- switch (sampler->format) {
- case TextureFormat::RGBA32F:
- return textureLinearRGBA32F(sampler, P);
- case TextureFormat::RGBA8:
- return textureLinearRGBA8(sampler, P);
- case TextureFormat::R8:
- return textureLinearR8(sampler, P);
- case TextureFormat::RG8:
- return textureLinearRG8(sampler, P);
- case TextureFormat::R16:
- return textureLinearR16(sampler, P);
- case TextureFormat::YUV422:
- return textureLinearYUV422(sampler, P);
- default:
- assert(false);
- return vec4();
- }
- } else {
- ivec2 coord(roundzero(P.x, sampler->width),
- roundzero(P.y, sampler->height));
- return texelFetch(sampler, coord, 0);
- }
-}
-
-vec4 texture(sampler2DRect sampler, vec2 P) {
- if (sampler->filter == TextureFilter::LINEAR) {
- switch (sampler->format) {
- case TextureFormat::RGBA8:
- return textureLinearRGBA8(sampler, P);
- case TextureFormat::R8:
- return textureLinearR8(sampler, P);
- case TextureFormat::RG8:
- return textureLinearRG8(sampler, P);
- case TextureFormat::R16:
- return textureLinearR16(sampler, P);
- case TextureFormat::YUV422:
- return textureLinearYUV422(sampler, P);
- default:
- assert(false);
- return vec4();
- }
- } else {
- ivec2 coord(roundzero(P.x, 1.0f), roundzero(P.y, 1.0f));
- return texelFetch(sampler, coord);
- }
-}
-
-template <typename S>
-vec4_scalar texture(S sampler, vec2_scalar P) {
- return force_scalar(texture(sampler, vec2(P)));
-}
-
-ivec2_scalar textureSize(sampler2D sampler, int) {
- return ivec2_scalar{int32_t(sampler->width), int32_t(sampler->height)};
-}
-
-ivec2_scalar textureSize(sampler2DRect sampler) {
- return ivec2_scalar{int32_t(sampler->width), int32_t(sampler->height)};
-}
-
-template <typename S>
-static WideRGBA8 textureLinearUnpackedRGBA8(S sampler, ivec2 i) {
- assert(sampler->format == TextureFormat::RGBA8);
- ivec2 frac = i;
- i >>= 7;
-
- I32 row0 = computeRow(sampler, i);
- I32 row1 = row0 + computeNextRowOffset(sampler, i);
- I16 fracx = computeFracX(sampler, i, frac);
- I16 fracy = computeFracY(frac);
+ CONVERT(frac.x & (i.x >= 0 && i.x < int32_t(sampler->width) - 1), I16);
+ I16 fracy = CONVERT(frac.y, I16);
auto a0 =
CONVERT(unaligned_load<V8<uint8_t>>(&sampler->buf[row0.x]), V8<int16_t>);
@@ -913,233 +48,80 @@ static WideRGBA8 textureLinearUnpackedRGBA8(S sampler, ivec2 i) {
auto cdh = combine(highHalf(c0), highHalf(d0));
cdl += ((cdh - cdl) * fracx.zzzzwwww) >> 7;
- return combine(HalfRGBA8(abl), HalfRGBA8(cdl));
+ return pack(combine(HalfRGBA8(abl), HalfRGBA8(cdl)));
}
template <typename S>
-static PackedRGBA8 textureLinearPackedRGBA8(S sampler, ivec2 i) {
- return pack(textureLinearUnpackedRGBA8(sampler, i));
+static inline void textureLinearCommit4(S sampler, ivec2 i, int zoffset,
+ uint32_t* buf) {
+ commit_span(buf, textureLinearPackedRGBA8(sampler, i, zoffset));
}
template <typename S>
-static PackedRGBA8 textureNearestPackedRGBA8(S sampler, ivec2 i) {
+static void textureLinearCommit8(S sampler, ivec2_scalar i, int zoffset,
+ uint32_t* buf) {
assert(sampler->format == TextureFormat::RGBA8);
- I32 row = computeRow(sampler, i, 0);
- return combine(unaligned_load<V4<uint8_t>>(&sampler->buf[row.x]),
- unaligned_load<V4<uint8_t>>(&sampler->buf[row.y]),
- unaligned_load<V4<uint8_t>>(&sampler->buf[row.z]),
- unaligned_load<V4<uint8_t>>(&sampler->buf[row.w]));
-}
-
-template <typename S>
-static PackedR8 textureLinearPackedR8(S sampler, ivec2 i) {
- return pack(textureLinearUnpackedR8(sampler, i));
-}
-
-template <typename S>
-static WideRG8 textureLinearUnpackedRG8(S sampler, ivec2 i) {
- assert(sampler->format == TextureFormat::RG8);
- ivec2 frac = i & 0x7F;
+ ivec2_scalar frac = i & 0x7F;
i >>= 7;
- I32 row0 = computeRow(sampler, i);
- I32 row1 = row0 + computeNextRowOffset(sampler, i);
- I16 fracx = computeFracX(sampler, i, frac);
- I16 fracy = computeFracY(frac);
-
- uint16_t* buf = (uint16_t*)sampler->buf;
-
- // Load RG bytes for two adjacent pixels - rgRG
- auto a0 = unaligned_load<V4<uint8_t>>(&buf[row0.x]);
- auto b0 = unaligned_load<V4<uint8_t>>(&buf[row0.y]);
- auto ab0 = CONVERT(combine(a0, b0), V8<int16_t>);
- // Load two pixels for next row
- auto a1 = unaligned_load<V4<uint8_t>>(&buf[row1.x]);
- auto b1 = unaligned_load<V4<uint8_t>>(&buf[row1.y]);
- auto ab1 = CONVERT(combine(a1, b1), V8<int16_t>);
- // Blend rows
- ab0 += ((ab1 - ab0) * fracy.xxxxyyyy) >> 7;
-
- auto c0 = unaligned_load<V4<uint8_t>>(&buf[row0.z]);
- auto d0 = unaligned_load<V4<uint8_t>>(&buf[row0.w]);
- auto cd0 = CONVERT(combine(c0, d0), V8<int16_t>);
- auto c1 = unaligned_load<V4<uint8_t>>(&buf[row1.z]);
- auto d1 = unaligned_load<V4<uint8_t>>(&buf[row1.w]);
- auto cd1 = CONVERT(combine(c1, d1), V8<int16_t>);
- // Blend rows
- cd0 += ((cd1 - cd0) * fracy.zzzzwwww) >> 7;
-
- // ab = a.rgRG,b.rgRG
- // cd = c.rgRG,d.rgRG
- // ... ac = a.rg,c.rg,a.RG,c.RG
- // ... bd = b.rg,d.rg,b.RG,d.RG
- auto ac = zip2Low(ab0, cd0);
- auto bd = zip2High(ab0, cd0);
- // a.rg,b.rg,c.rg,d.rg
- // a.RG,b.RG,c.RG,d.RG
- auto abcdl = zip2Low(ac, bd);
- auto abcdh = zip2High(ac, bd);
- // Blend columns
- abcdl += ((abcdh - abcdl) * fracx.xxyyzzww) >> 7;
-
- return WideRG8(abcdl);
-}
-
-template <typename S>
-static PackedRG8 textureLinearPackedRG8(S sampler, ivec2 i) {
- return pack(textureLinearUnpackedRG8(sampler, i));
-}
-
-template <int N>
-static ALWAYS_INLINE VectorType<uint16_t, N> addsat(VectorType<uint16_t, N> x,
- VectorType<uint16_t, N> y) {
- auto r = x + y;
- return r | (r < x);
-}
-
-template <typename P, typename S>
-static VectorType<uint16_t, 4 * sizeof(P)> gaussianBlurHorizontal(
- S sampler, const ivec2_scalar& i, int minX, int maxX, int radius,
- float coeff, float coeffStep) {
- // Packed and unpacked vectors for a chunk of the given pixel type.
- typedef VectorType<uint8_t, 4 * sizeof(P)> packed_type;
- typedef VectorType<uint16_t, 4 * sizeof(P)> unpacked_type;
-
- // Pre-scale the coefficient by 8 bits of fractional precision, so that when
- // the sample is multiplied by it, it will yield a 16 bit unsigned integer
- // that will use all 16 bits of precision to accumulate the sum.
- coeff *= 1 << 8;
- float coeffStep2 = coeffStep * coeffStep;
-
- int row = computeRow(sampler, i);
- P* buf = (P*)sampler->buf;
- auto pixelsRight = unaligned_load<V4<P>>(&buf[row]);
- auto pixelsLeft = pixelsRight;
- auto sum = CONVERT(bit_cast<packed_type>(pixelsRight), unpacked_type) *
- uint16_t(coeff + 0.5f);
-
- // Here we use some trickery to reuse the pixels within a chunk, shifted over
- // by one pixel, to get the next sample for the entire chunk. This allows us
- // to sample only one pixel for each offset across the entire chunk in both
- // the left and right directions. To avoid clamping within the loop to the
- // texture bounds, we compute the valid radius that doesn't require clamping
- // and fall back to a slower clamping loop outside of that valid radius.
- int offset = 1;
- // The left bound is how much we can offset the sample before the start of
- // the row bounds.
- int leftBound = i.x - max(minX, 0);
- // The right bound is how much we can offset the sample before the end of the
- // row bounds.
- int rightBound = min(maxX, sampler->width - 1) - i.x;
- int validRadius = min(radius, min(leftBound, rightBound - (4 - 1)));
- for (; offset <= validRadius; offset++) {
- // Overwrite the pixel that needs to be shifted out with the new pixel, and
- // shift it into the correct location.
- pixelsRight.x = unaligned_load<P>(&buf[row + offset + 4 - 1]);
- pixelsRight = pixelsRight.yzwx;
- pixelsLeft = pixelsLeft.wxyz;
- pixelsLeft.x = unaligned_load<P>(&buf[row - offset]);
-
- // Accumulate the Gaussian coefficients step-wise.
- coeff *= coeffStep;
- coeffStep *= coeffStep2;
-
- // Both left and right samples at this offset use the same coefficient.
- sum = addsat(sum,
- (CONVERT(bit_cast<packed_type>(pixelsRight), unpacked_type) +
- CONVERT(bit_cast<packed_type>(pixelsLeft), unpacked_type)) *
- uint16_t(coeff + 0.5f));
- }
-
- for (; offset <= radius; offset++) {
- pixelsRight.x =
- unaligned_load<P>(&buf[row + min(offset + 4 - 1, rightBound)]);
- pixelsRight = pixelsRight.yzwx;
- pixelsLeft = pixelsLeft.wxyz;
- pixelsLeft.x = unaligned_load<P>(&buf[row - min(offset, leftBound)]);
-
- coeff *= coeffStep;
- coeffStep *= coeffStep2;
-
- sum = addsat(sum,
- (CONVERT(bit_cast<packed_type>(pixelsRight), unpacked_type) +
- CONVERT(bit_cast<packed_type>(pixelsLeft), unpacked_type)) *
- uint16_t(coeff + 0.5f));
- }
-
- // Shift away the intermediate precision.
- return sum >> 8;
-}
-
-template <typename P, typename S>
-static VectorType<uint16_t, 4 * sizeof(P)> gaussianBlurVertical(
- S sampler, const ivec2_scalar& i, int minY, int maxY, int radius,
- float coeff, float coeffStep) {
- // Packed and unpacked vectors for a chunk of the given pixel type.
- typedef VectorType<uint8_t, 4 * sizeof(P)> packed_type;
- typedef VectorType<uint16_t, 4 * sizeof(P)> unpacked_type;
-
- // Pre-scale the coefficient by 8 bits of fractional precision, so that when
- // the sample is multiplied by it, it will yield a 16 bit unsigned integer
- // that will use all 16 bits of precision to accumulate the sum.
- coeff *= 1 << 8;
- float coeffStep2 = coeffStep * coeffStep;
-
- int rowAbove = computeRow(sampler, i);
- int rowBelow = rowAbove;
- P* buf = (P*)sampler->buf;
- auto pixels = unaligned_load<V4<P>>(&buf[rowAbove]);
- auto sum = CONVERT(bit_cast<packed_type>(pixels), unpacked_type) *
- uint16_t(coeff + 0.5f);
-
- // For the vertical loop we can't be quite as creative with reusing old values
- // as we were in the horizontal loop. We just do the obvious implementation of
- // loading a chunk from each row in turn and accumulating it into the sum. We
- // compute a valid radius within which we don't need to clamp the sampled row
- // and use that to avoid any clamping in the main inner loop. We fall back to
- // a slower clamping loop outside of that valid radius.
- int offset = 1;
- int belowBound = i.y - max(minY, 0);
- int aboveBound = min(maxY, sampler->height - 1) - i.y;
- int validRadius = min(radius, min(belowBound, aboveBound));
- for (; offset <= validRadius; offset++) {
- rowAbove += sampler->stride;
- rowBelow -= sampler->stride;
- auto pixelsAbove = unaligned_load<V4<P>>(&buf[rowAbove]);
- auto pixelsBelow = unaligned_load<V4<P>>(&buf[rowBelow]);
-
- // Accumulate the Gaussian coefficients step-wise.
- coeff *= coeffStep;
- coeffStep *= coeffStep2;
-
- // Both above and below samples at this offset use the same coefficient.
- sum = addsat(sum,
- (CONVERT(bit_cast<packed_type>(pixelsAbove), unpacked_type) +
- CONVERT(bit_cast<packed_type>(pixelsBelow), unpacked_type)) *
- uint16_t(coeff + 0.5f));
+ uint32_t* row0 =
+ &sampler
+ ->buf[clampCoord(i.x, sampler->width) +
+ clampCoord(i.y, sampler->height) * sampler->stride + zoffset];
+ uint32_t* row1 =
+ row0 +
+ ((i.y >= 0 && i.y < int32_t(sampler->height) - 1) ? sampler->stride : 0);
+ int16_t fracx = i.x >= 0 && i.x < int32_t(sampler->width) - 1 ? frac.x : 0;
+ int16_t fracy = frac.y;
+
+ U32 pix0 = unaligned_load<U32>(row0);
+ U32 pix0n = unaligned_load<U32>(row0 + 4);
+ uint32_t pix0x = row0[8];
+ U32 pix1 = unaligned_load<U32>(row1);
+ U32 pix1n = unaligned_load<U32>(row1 + 4);
+ uint32_t pix1x = row1[8];
+
+ {
+ auto ab0 = CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix0, pix0, 0, 1, 1, 2)),
+ V16<int16_t>);
+ auto ab1 = CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix1, pix1, 0, 1, 1, 2)),
+ V16<int16_t>);
+ ab0 += ((ab1 - ab0) * fracy) >> 7;
+
+ auto cd0 = CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix0, pix0n, 2, 3, 3, 4)),
+ V16<int16_t>);
+ auto cd1 = CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix1, pix1n, 2, 3, 3, 4)),
+ V16<int16_t>);
+ cd0 += ((cd1 - cd0) * fracy) >> 7;
+
+ auto abcdl = combine(lowHalf(ab0), lowHalf(cd0));
+ auto abcdh = combine(highHalf(ab0), highHalf(cd0));
+ abcdl += ((abcdh - abcdl) * fracx) >> 7;
+
+ commit_span(buf, pack(WideRGBA8(abcdl)));
}
- for (; offset <= radius; offset++) {
- if (offset <= aboveBound) {
- rowAbove += sampler->stride;
- }
- if (offset <= belowBound) {
- rowBelow -= sampler->stride;
- }
- auto pixelsAbove = unaligned_load<V4<P>>(&buf[rowAbove]);
- auto pixelsBelow = unaligned_load<V4<P>>(&buf[rowBelow]);
-
- coeff *= coeffStep;
- coeffStep *= coeffStep2;
-
- sum = addsat(sum,
- (CONVERT(bit_cast<packed_type>(pixelsAbove), unpacked_type) +
- CONVERT(bit_cast<packed_type>(pixelsBelow), unpacked_type)) *
- uint16_t(coeff + 0.5f));
+ {
+ auto ab0 =
+ CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix0n, pix0n, 0, 1, 1, 2)),
+ V16<int16_t>);
+ auto ab1 =
+ CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix1n, pix1n, 0, 1, 1, 2)),
+ V16<int16_t>);
+ ab0 += ((ab1 - ab0) * fracy) >> 7;
+
+ auto cd0 =
+ CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix0n, U32(pix0x), 2, 3, 3, 4)),
+ V16<int16_t>);
+ auto cd1 =
+ CONVERT(bit_cast<V16<uint8_t>>(SHUFFLE(pix1n, U32(pix1x), 2, 3, 3, 4)),
+ V16<int16_t>);
+ cd0 += ((cd1 - cd0) * fracy) >> 7;
+
+ auto abcdl = combine(lowHalf(ab0), lowHalf(cd0));
+ auto abcdh = combine(highHalf(ab0), highHalf(cd0));
+ abcdl += ((abcdh - abcdl) * fracx) >> 7;
+
+ commit_span(buf + 4, pack(WideRGBA8(abcdl)));
}
-
- // Shift away the intermediate precision.
- return sum >> 8;
}
-
-} // namespace glsl
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-30 05:10:06 +0000