From 8cd7bd5efbb1809fe657718d6754c7762ca6653b Mon Sep 17 00:00:00 2001
From: Mike Reed <reed@google.com>
Date: Mon, 7 Dec 2009 16:31:49 -0500
Subject: first impl for NDK access to bitmaps

---
 libjnigraphics/bitmap.cpp | 94 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 libjnigraphics/bitmap.cpp

(limited to 'libjnigraphics/bitmap.cpp')

diff --git a/libjnigraphics/bitmap.cpp b/libjnigraphics/bitmap.cpp
new file mode 100644
index 00000000..fd73430b
--- /dev/null
+++ b/libjnigraphics/bitmap.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+#include <android/bitmap.h>
+#include <GraphicsJNI.h>
+
+int AndroidBitmap_getInfo(JNIEnv* env, jobject jbitmap,
+                          AndroidBitmapInfo* info) {
+    if (NULL == env || NULL == jbitmap) {
+        return ANDROID_BITMAP_RESULT_BAD_PARAMETER;
+    }
+
+    SkBitmap* bm = GraphicsJNI::getNativeBitmap(env, jbitmap);
+    if (NULL == bm) {
+        return ANDROID_BITMAP_RESULT_JNI_EXCEPTION;
+    }
+
+    if (info) {
+        info->width     = bm->width();
+        info->height    = bm->height();
+        info->stride    = bm->rowBytes();
+        info->flags     = 0;
+
+        switch (bm->config()) {
+            case SkBitmap::kARGB_8888_Config:
+                info->format = ANDROID_BITMAP_FORMAT_RGBA_8888;
+                break;
+            case SkBitmap::kRGB_565_Config:
+                info->format = ANDROID_BITMAP_FORMAT_RGB_565;
+                break;
+            case SkBitmap::kARGB_4444_Config:
+                info->format = ANDROID_BITMAP_FORMAT_RGBA_4444;
+                break;
+            case SkBitmap::kA8_Config:
+                info->format = ANDROID_BITMAP_FORMAT_A_8;
+                break;
+            default:
+                info->format = ANDROID_BITMAP_FORMAT_NONE;
+                break;
+        }
+    }
+    return ANDROID_BITMAP_RESUT_SUCCESS;
+}
+
+int AndroidBitmap_lockPixels(JNIEnv* env, jobject jbitmap, void** addrPtr) {
+    if (NULL == env || NULL == jbitmap) {
+        return ANDROID_BITMAP_RESULT_BAD_PARAMETER;
+    }
+
+    SkBitmap* bm = GraphicsJNI::getNativeBitmap(env, jbitmap);
+    if (NULL == bm) {
+        return ANDROID_BITMAP_RESULT_JNI_EXCEPTION;
+    }
+
+    bm->lockPixels();
+    void* addr = bm->getPixels();
+    if (NULL == addr) {
+        bm->unlockPixels();
+        return ANDROID_BITMAP_RESULT_ALLOCATION_FAILED;
+    }
+
+    if (addrPtr) {
+        *addrPtr = addr;
+    }
+    return ANDROID_BITMAP_RESUT_SUCCESS;
+}
+
+int AndroidBitmap_unlockPixels(JNIEnv* env, jobject jbitmap) {
+    if (NULL == env || NULL == jbitmap) {
+        return ANDROID_BITMAP_RESULT_BAD_PARAMETER;
+    }
+
+    SkBitmap* bm = GraphicsJNI::getNativeBitmap(env, jbitmap);
+    if (NULL == bm) {
+        return ANDROID_BITMAP_RESULT_JNI_EXCEPTION;
+    }
+
+    bm->unlockPixels();
+    return ANDROID_BITMAP_RESUT_SUCCESS;
+}
+
-- 
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