1 files changed, 105 insertions, 0 deletions
diff --git a/converter/other/qoi.h b/converter/other/qoi.h
new file mode 100644
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--- /dev/null
+++ b/converter/other/qoi.h
@@ -0,0 +1,105 @@
+#ifndef QOI_H_INCLUDED
+#define QOI_H_INCLUDED
+/*
+
+QOI - The "Quite OK Image" format for fast, lossless image compression
+
+Dominic Szablewski - https://phoboslab.org
+
+
+-- LICENSE: The MIT License(MIT)
+
+Copyright(c) 2021 Dominic Szablewski
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files(the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and / or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions :
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+
+typedef enum {
+    QOI_SRGB = 0,
+    QOI_LINEAR = 1
+} qoi_Colorspace;
+
+
+typedef struct {
+    unsigned int   width;
+    unsigned int   height;
+    unsigned int   channelCt;
+    qoi_Colorspace colorspace;
+} qoi_Desc;
+
+
+
+#define QOI_OP_INDEX  0x00 /* 00xxxxxx */
+#define QOI_OP_DIFF   0x40 /* 01xxxxxx */
+#define QOI_OP_LUMA   0x80 /* 10xxxxxx */
+#define QOI_OP_RUN    0xc0 /* 11xxxxxx */
+#define QOI_OP_RGB    0xfe /* 11111110 */
+#define QOI_OP_RGBA   0xff /* 11111111 */
+
+#define QOI_MASK_2    0xc0 /* 11000000 */
+
+#define QOI_HEADER_SIZE 14
+
+/* 2GB is the max file size that this implementation can safely handle. We
+   guard against anything larger than that, assuming the worst case with 5
+   bytes per pixel, rounded down to a nice clean value. 400 million pixels
+   ought to be enough for anybody.
+ */
+#define QOI_PIXELS_MAX 400000000
+
+static unsigned int const qoi_pixels_max = (unsigned int) QOI_PIXELS_MAX;
+
+#define QOI_MAXVAL 255
+
+#define QOI_INDEX_SIZE 64
+
+
+typedef union {
+    struct { unsigned char r, g, b, a; } rgba;
+    unsigned int v;
+} qoi_Rgba;
+
+static __inline__ unsigned int
+qoi_colorHash(qoi_Rgba const x) {
+
+    return
+        (x.rgba.r*3 + x.rgba.g*5 + x.rgba.b*7 + x.rgba.a*11) % QOI_INDEX_SIZE;
+}
+
+
+
+static __inline__ void
+qoi_clearQoiIndex(qoi_Rgba * index) {
+
+    memset(index, 0, QOI_INDEX_SIZE * sizeof(qoi_Rgba));
+
+}
+
+
+
+#define QOI_MAGIC_SIZE 4
+
+static char const qoi_magic[QOI_MAGIC_SIZE + 1] = {'q','o','i','f','\0'};
+
+#define QOI_PADDING_SIZE 8
+
+static unsigned char const qoi_padding[QOI_PADDING_SIZE] = {0,0,0,0,0,0,0,1};
+
+
+#endif