auto import from //depot/cupcake/@135843

1 files changed, 97 insertions, 0 deletions

diff --git a/libs/ui/PixelFormat.cpp b/libs/ui/PixelFormat.cpp
new file mode 100644
index 0000000..b65ed97
--- /dev/null
+++ b/libs/ui/PixelFormat.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2007 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 <ui/PixelFormat.h>
+#include <pixelflinger/format.h>
+
+namespace android {
+
+size_t PixelFormatInfo::getScanlineSize(unsigned int width) const
+{
+    size_t size;
+    if ((components >= 6) && (components <= 8)) {
+        // YCbCr formats are differents.
+        size = (width * bitsPerPixel)>>3;
+    } else {
+        size = width * bytesPerPixel;
+    }
+    return size;
+}
+
+ssize_t bytesPerPixel(PixelFormat format)
+{
+    PixelFormatInfo info;
+    status_t err = getPixelFormatInfo(format, &info);
+    return (err < 0) ? err : info.bytesPerPixel;
+}
+
+ssize_t bitsPerPixel(PixelFormat format)
+{
+    PixelFormatInfo info;
+    status_t err = getPixelFormatInfo(format, &info);
+    return (err < 0) ? err : info.bitsPerPixel;
+}
+
+status_t getPixelFormatInfo(PixelFormat format, PixelFormatInfo* info)
+{
+    if (format < 0)
+        return BAD_VALUE;
+
+    if (info->version != sizeof(PixelFormatInfo))
+        return INVALID_OPERATION;
+
+    size_t numEntries;
+    const GGLFormat *i = gglGetPixelFormatTable(&numEntries) + format;
+    bool valid = uint32_t(format) < numEntries;
+    if (!valid) {
+        return BAD_INDEX;
+    }
+    
+    #define COMPONENT(name) \ 
+        case GGL_##name: info->components = PixelFormatInfo::name; break;
+    
+    switch (i->components) {
+        COMPONENT(ALPHA)
+        COMPONENT(RGB)
+        COMPONENT(RGBA)
+        COMPONENT(LUMINANCE)
+        COMPONENT(LUMINANCE_ALPHA)
+        COMPONENT(Y_CB_CR_SP)
+        COMPONENT(Y_CB_CR_P)
+        COMPONENT(Y_CB_CR_I)
+        default:
+            return BAD_INDEX;
+    }
+    
+    #undef COMPONENT
+    
+    info->format = format;
+    info->bytesPerPixel = i->size;
+    info->bitsPerPixel  = i->bitsPerPixel;
+    info->h_alpha       = i->ah;
+    info->l_alpha       = i->al;
+    info->h_red         = i->rh;
+    info->l_red         = i->rl;
+    info->h_green       = i->gh;
+    info->l_green       = i->gl;
+    info->h_blue        = i->bh;
+    info->l_blue        = i->bl;
+
+    return NO_ERROR;
+}
+
+}; // namespace android
+