(RJPEG) Add rjpeg_alloc

libretro-common/formats/image_transfer.c

@@ -38,6 +38,7 @@ void *image_transfer_new(enum image_type_enum type)
          break;
       case IMAGE_TYPE_JPEG:
 #ifdef HAVE_RJPEG
+         return rjpeg_alloc();
 #endif
          break;
    }

libretro-common/formats/jpeg/rjpeg.c

@@ -33,6 +33,7 @@
 #include <retro_inline.h>
 #include <boolean.h>
 #include <formats/image.h>
+#include <formats/rjpeg.h>
 #include <features/features_cpu.h>
 
 enum
@@ -64,6 +65,11 @@ typedef struct
    int ypos;    /* which pre-expansion row we're on */
 } rjpeg__resample;
 
+struct rjpeg
+{
+   void *empty;
+};
+
 #ifdef _MSC_VER
 #define RJPEG_HAS_LROTL
 #endif
@@ -2460,3 +2466,11 @@ bool rjpeg_image_load(uint8_t *_buf, void *data, size_t size,
 
    return true;
 }
+
+void *rjpeg_alloc(void)
+{
+   rjpeg_t *rjpeg = (rjpeg_t*)calloc(1, sizeof(*rjpeg));
+   if (!rjpeg)
+      return NULL;
+   return rjpeg;
+}

libretro-common/include/formats/rjpeg.h

@@ -32,9 +32,13 @@
 
 RETRO_BEGIN_DECLS
 
+typedef struct rjpeg rjpeg_t;
+
 bool rjpeg_image_load(uint8_t *buf, void *data, size_t size,
       unsigned a_shift, unsigned r_shift, unsigned g_shift, unsigned b_shift);
 
+void *rjpeg_alloc(void);
+
 RETRO_END_DECLS
 
 #endif