first commit

2025-09-16 15:54:17 +08:00
commit fffe32888c
21 changed files with 1749 additions and 0 deletions
--- a/gralloc/gralloc_priv.h
+++ b/gralloc/gralloc_priv.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GRALLOC_PRIV_H_
+#define GRALLOC_PRIV_H_
+
+#include <stdint.h>
+#include <limits.h>
+#include <sys/cdefs.h>
+#include <hardware/gralloc.h>
+#include <pthread.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <cutils/native_handle.h>
+
+#include <linux/fb.h>
+
+/*****************************************************************************/
+
+struct private_module_t;
+struct private_handle_t;
+
+struct private_module_t {
+    gralloc_module_t base;
+
+    private_handle_t* framebuffer;
+    uint32_t flags;
+    uint32_t numBuffers;
+    uint32_t bufferMask;
+    pthread_mutex_t lock;
+    buffer_handle_t currentBuffer;
+    int pmem_master;
+    void* pmem_master_base;
+
+    struct fb_var_screeninfo info;
+    struct fb_fix_screeninfo finfo;
+    float xdpi;
+    float ydpi;
+    float fps;
+};
+
+/*****************************************************************************/
+
+#ifdef __cplusplus
+struct private_handle_t : public native_handle {
+#else
+struct private_handle_t {
+    struct native_handle nativeHandle;
+#endif
+
+    enum {
+        PRIV_FLAGS_FRAMEBUFFER = 0x00000001
+    };
+
+    // file-descriptors
+    int     fd;
+    // ints
+    int     magic;
+    int     flags;
+    int     size;
+    int     offset;
+
+    // FIXME: the attributes below should be out-of-line
+    uint64_t base __attribute__((aligned(8)));
+    int     pid;
+
+#ifdef __cplusplus
+    static inline int sNumInts() {
+        return (((sizeof(private_handle_t) - sizeof(native_handle_t))/sizeof(int)) - sNumFds);
+    }
+    static const int sNumFds = 1;
+    static const int sMagic = 0x3141592;
+
+    private_handle_t(int fd, int size, int flags) :
+        fd(fd), magic(sMagic), flags(flags), size(size), offset(0),
+        base(0), pid(getpid())
+    {
+        version = sizeof(native_handle);
+        numInts = sNumInts();
+        numFds = sNumFds;
+    }
+    ~private_handle_t() {
+        magic = 0;
+    }
+
+    static int validate(const native_handle* h) {
+        const private_handle_t* hnd = (const private_handle_t*)h;
+        if (!h || h->version != sizeof(native_handle) ||
+                h->numInts != sNumInts() || h->numFds != sNumFds ||
+                hnd->magic != sMagic)
+        {
+            ALOGE("invalid gralloc handle (at %p)", h);
+            return -EINVAL;
+        }
+        return 0;
+    }
+#endif
+};
+
+#endif /* GRALLOC_PRIV_H_ */