*合并master到minimal分支

1 files changed, 96 insertions, 0 deletions

diff --git a/src/libjin/Graphics/fonts/je_decoder.cpp b/src/libjin/Graphics/fonts/je_decoder.cpp
new file mode 100644
index 0000000..02112a0
--- /dev/null
+++ b/src/libjin/Graphics/fonts/je_decoder.cpp
@@ -0,0 +1,96 @@
+#include <stdlib.h>
+#include <string.h>
+#include "je_decoder.h"
+
+namespace JinEngine
+{
+	namespace Graphics
+	{
+        namespace Fonts
+        {
+
+            /* utf8 byte string to unicode codepoint */
+            static const char *utf8toCodepoint(const char *p, unsigned *res) {
+                return nullptr;
+
+            }
+
+            /////////////////////////////////////////////////////////////////////////////
+            // decoders
+            /////////////////////////////////////////////////////////////////////////////
+
+            const void* Utf8::decode(const void* data, Codepoint* res) const
+            {
+                const char* p = (char*)data;
+                unsigned x, mask, shift;
+                switch (*p & 0xf0) {
+                case 0xf0:  mask = 0x07;  shift = 18;   break;
+                case 0xe0:  mask = 0x0f;  shift = 12;   break;
+                case 0xc0:
+                case 0xd0:  mask = 0x1f;  shift = 6;   break;
+                default:
+                    *res = *p;
+                    return p + 1;
+                }
+                x = (*p & mask) << shift;
+                do {
+                    if (*(++p) == '\0') {
+                        *res = x;
+                        return p;
+                    }
+                    shift -= 6;
+                    x |= (*p & 0x3f) << shift;
+                } while (shift);
+                *res = x;
+                return p + 1;
+            }
+
+            const void* Utf8::next(const void* data) const
+            {
+                const char* p = (char*)data;
+                unsigned x, mask, shift;
+                switch (*p & 0xf0) {
+                case 0xf0:  mask = 0x07;  shift = 18;   break;
+                case 0xe0:  mask = 0x0f;  shift = 12;   break;
+                case 0xc0:
+                case 0xd0:  mask = 0x1f;  shift = 6;   break;
+                default:
+                    return p + 1;
+                }
+                x = (*p & mask) << shift;
+                do {
+                    if (*(++p) == '\0') {
+                        return p;
+                    }
+                    shift -= 6;
+                    x |= (*p & 0x3f) << shift;
+                } while (shift);
+                return p + 1;
+            }
+            /*
+                const void* Utf16::decode(const void* data, Codepoint* res) const
+                {
+                    return nullptr;
+                }
+
+                const void* Utf16::next(const void* data) const
+                {
+                    return nullptr;
+                }
+            */
+            const void* Ascii::decode(const void* data, Codepoint* res) const
+            {
+                const char* p = (char*)data;
+                *res = *p;
+                return p + 1;
+            }
+
+            const void* Ascii::next(const void* data) const
+            {
+                const char* p = (char*)data;
+                return p + 1;
+            }
+
+        } // namespace Fonts
+	} // namespace Graphics
+} // namespace JinEngine
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