Update bundled libwebp to version 1.0.0

This commit imports libwebp 1.0.0, including AUTHORS, COPYING, ChangeLog,
NEWS, PATENTS, README and src directories. In src, only includes header
and source files.

Upstream changes since 0.6.1 have been merged in.
Also updated version in qt_attribution.json.

[ChangeLog][Third-Party Code] Update bundled libwebp to version 1.0.0.

Change-Id: Ia30ccc90286d5dd3e48e091f101f1cae84785150
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>

1 files changed, 52 insertions, 3 deletions

diff --git a/src/3rdparty/libwebp/src/dsp/dsp.h b/src/3rdparty/libwebp/src/dsp/dsp.h
index 5b703a1..4ab77a5 100644
--- a/src/3rdparty/libwebp/src/dsp/dsp.h
+++ b/src/3rdparty/libwebp/src/dsp/dsp.h
@@ -60,8 +60,7 @@ extern "C" {
 #endif
 
 #if defined(_MSC_VER) && _MSC_VER >= 1500 && \
-    (defined(_M_X64) || defined(_M_IX86)) && \
-    !defined(__clang__)
+    (defined(_M_X64) || defined(_M_IX86))
 #define WEBP_MSC_SSE41  // Visual C++ SSE4.1 targets
 #endif
 
@@ -142,6 +141,42 @@ extern "C" {
 #endif
 #endif
 
+#if defined(WEBP_USE_THREAD) && !defined(_WIN32)
+#include <pthread.h>  // NOLINT
+
+#define WEBP_DSP_INIT(func) do {                                    \
+  static volatile VP8CPUInfo func ## _last_cpuinfo_used =           \
+      (VP8CPUInfo)&func ## _last_cpuinfo_used;                      \
+  static pthread_mutex_t func ## _lock = PTHREAD_MUTEX_INITIALIZER; \
+  if (pthread_mutex_lock(&func ## _lock)) break;                    \
+  if (func ## _last_cpuinfo_used != VP8GetCPUInfo) func();          \
+  func ## _last_cpuinfo_used = VP8GetCPUInfo;                       \
+  (void)pthread_mutex_unlock(&func ## _lock);                       \
+} while (0)
+#else  // !(defined(WEBP_USE_THREAD) && !defined(_WIN32))
+#define WEBP_DSP_INIT(func) do {                                    \
+  static volatile VP8CPUInfo func ## _last_cpuinfo_used =           \
+      (VP8CPUInfo)&func ## _last_cpuinfo_used;                      \
+  if (func ## _last_cpuinfo_used == VP8GetCPUInfo) break;           \
+  func();                                                           \
+  func ## _last_cpuinfo_used = VP8GetCPUInfo;                       \
+} while (0)
+#endif  // defined(WEBP_USE_THREAD) && !defined(_WIN32)
+
+// Defines an Init + helper function that control multiple initialization of
+// function pointers / tables.
+/* Usage:
+   WEBP_DSP_INIT_FUNC(InitFunc) {
+     ...function body
+   }
+*/
+#define WEBP_DSP_INIT_FUNC(name)                             \
+  static WEBP_TSAN_IGNORE_FUNCTION void name ## _body(void); \
+  WEBP_TSAN_IGNORE_FUNCTION void name(void) {                \
+    WEBP_DSP_INIT(name ## _body);                            \
+  }                                                          \
+  static WEBP_TSAN_IGNORE_FUNCTION void name ## _body(void)
+
 #define WEBP_UBSAN_IGNORE_UNDEF
 #define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW
 #if defined(__clang__) && defined(__has_attribute)
@@ -167,6 +202,13 @@ extern "C" {
 #define WEBP_SWAP_16BIT_CSP 0
 #endif
 
+// some endian fix (e.g.: mips-gcc doesn't define __BIG_ENDIAN__)
+#if !defined(WORDS_BIGENDIAN) && \
+    (defined(__BIG_ENDIAN__) || defined(_M_PPC) || \
+     (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)))
+#define WORDS_BIGENDIAN
+#endif
+
 typedef enum {
   kSSE2,
   kSSE3,
@@ -190,7 +232,7 @@ WEBP_EXTERN VP8CPUInfo VP8GetCPUInfo;
 // avoiding a compiler warning.
 #define WEBP_DSP_INIT_STUB(func) \
   extern void func(void); \
-  WEBP_TSAN_IGNORE_FUNCTION void func(void) {}
+  void func(void) {}
 
 //------------------------------------------------------------------------------
 // Encoding
@@ -579,6 +621,13 @@ void WebPMultRow_C(uint8_t* const ptr, const uint8_t* const alpha,
                    int width, int inverse);
 void WebPMultARGBRow_C(uint32_t* const ptr, int width, int inverse);
 
+#ifdef WORDS_BIGENDIAN
+// ARGB packing function: a/r/g/b input is rgba or bgra order.
+extern void (*WebPPackARGB)(const uint8_t* a, const uint8_t* r,
+                            const uint8_t* g, const uint8_t* b, int len,
+                            uint32_t* out);
+#endif
+
 // RGB packing function. 'step' can be 3 or 4. r/g/b input is rgb or bgr order.
 extern void (*WebPPackRGB)(const uint8_t* r, const uint8_t* g, const uint8_t* b,
                            int len, int step, uint32_t* out);