1 files changed, 81 insertions, 0 deletions
diff --git a/external/skia/source/skia_opts_internal.hxx b/external/skia/source/skia_opts_internal.hxx
new file mode 100644
index 000000000..0ca6a0435
--- /dev/null
+++ b/external/skia/source/skia_opts_internal.hxx
@@ -0,0 +1,81 @@
+/*
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SKIA_OPTS_INTERNAL_H
+#define SKIA_OPTS_INTERNAL_H
+
+#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
+    #include <immintrin.h>
+#endif
+
+namespace SK_OPTS_NS {
+
+static void RGB1_to_RGB_portable(uint8_t dst[], const uint32_t* src, int count) {
+    for (int i = 0; i < count; i++) {
+        dst[0] = src[i] >> 0;
+        dst[1] = src[i] >> 8;
+        dst[2] = src[i] >> 16;
+        dst += 3;
+    }
+}
+static void RGB1_to_R_portable(uint8_t dst[], const uint32_t* src, int count) {
+    for (int i = 0; i < count; i++) {
+        dst[i] = src[i] & 0xFF;
+    }
+}
+
+#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
+inline void RGB1_to_RGB(uint8_t dst[], const uint32_t* src, int count) {
+        const uint8_t X = 0xFF; // Used a placeholder.  The value of X is irrelevant.
+        __m128i pack = _mm_setr_epi8(0,1,2, 4,5,6, 8,9,10, 12,13,14, X,X,X,X);
+
+// Storing 4 pixels should store 12 bytes, but here it stores 16, so test count >= 6
+// in order to not overrun the output buffer.
+        while (count >= 6) {
+            __m128i rgba = _mm_loadu_si128((const __m128i*) src);
+
+            __m128i rgb = _mm_shuffle_epi8(rgba, pack);
+
+            // Store 4 pixels.
+            _mm_storeu_si128((__m128i*) dst, rgb);
+
+            src += 4;
+            dst += 4*3;
+            count -= 4;
+        }
+        RGB1_to_RGB_portable(dst, src, count);
+}
+
+inline void RGB1_to_R(uint8_t dst[], const uint32_t* src, int count) {
+        const uint8_t X = 0xFF; // Used a placeholder.  The value of X is irrelevant.
+        __m128i pack = _mm_setr_epi8(0,4,8,12, X,X,X,X,X,X,X,X,X,X,X,X);
+
+        while (count >= 4) {
+            __m128i rgba = _mm_loadu_si128((const __m128i*) src);
+
+            __m128i rgb = _mm_shuffle_epi8(rgba, pack);
+
+            // Store 4 pixels.
+            *((uint32_t*)dst) = _mm_cvtsi128_si32(rgb);
+
+            src += 4;
+            dst += 4;
+            count -= 4;
+        }
+        RGB1_to_R_portable(dst, src, count);
+}
+
+#else
+inline void RGB1_to_RGB(uint8_t dst[], const uint32_t* src, int count) {
+    RGB1_to_RGB_portable(dst, src, count);
+}
+inline void RGB1_to_R(uint8_t dst[], const uint32_t* src, int count) {
+    RGB1_to_R_portable(dst, src, count);
+}
+#endif
+
+} // namespace
+
+#endif