jessikitty/mikunyan
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

add PVRTC support

Browse Source
This commit is contained in:
Ishotihadus
2019-12-13 03:15:35 +09:00
parent b92b00fc4a
commit e683b3c91a
4 changed files with 325 additions and 140 deletions
Download Patch File Download Diff File Expand all files Collapse all files
ext/decoders/native/main.c
+25
View File
@@ -237,6 +237,30 @@ static VALUE rb_decode_pvrtc1_4bpp(VALUE self, VALUE rb_data, VALUE w, VALUE h)
return ret;
}
/*
* Decode image from PVRTC1 2bpp compressed binary
*
* @param [String] rb_data binary to decode
* @param [Integer] w image width
* @param [Integer] h image height
* @return [String] decoded rgba binary
*/
static VALUE rb_decode_pvrtc1_2bpp(VALUE self, VALUE rb_data, VALUE w, VALUE h)
{
if (RSTRING_LEN(rb_data) < ((FIX2LONG(w) + 7) / 8) * ((FIX2LONG(h) + 3) / 4) * 8) {
rb_raise(rb_eStandardError, "Data size is not enough.");
return Qnil;
}
size_t buffer_length = FIX2LONG(w) * FIX2LONG(h) * 8;
VALUE ret = rb_str_buf_new(buffer_length);
if (!decode_pvrtc_2bpp((uint8_t*)RSTRING_PTR(rb_data), FIX2INT(w), FIX2INT(h), (uint32_t*)RSTRING_PTR(ret))) {
rb_raise(rb_eStandardError, "internal error");
return Qnil;
}
rb_str_set_len(ret, buffer_length);
return ret;
}
void Init_native()
{
VALUE mMikunyan = rb_define_module("Mikunyan");
@@ -253,4 +277,5 @@ void Init_native()
rb_define_module_function(mDecodeHelper, "decode_dxt1", rb_decode_dxt1, 3);
rb_define_module_function(mDecodeHelper, "decode_dxt5", rb_decode_dxt5, 3);
rb_define_module_function(mDecodeHelper, "decode_pvrtc1_4bpp", rb_decode_pvrtc1_4bpp, 3);
rb_define_module_function(mDecodeHelper, "decode_pvrtc1_2bpp", rb_decode_pvrtc1_2bpp, 3);
}