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author | Treehugger Robot <treehugger-gerrit@google.com> | 2018-04-14 03:04:35 +0200 |
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committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2018-04-14 03:04:35 +0200 |
commit | 3c8fdf32743cf075a434c2fb124943c659bb971d (patch) | |
tree | f2dbeeecc05a86358e7d541dd9efb74eba7d968c /minui/include/private/resources.h | |
parent | Merge "minadbd: track signature change of service_to_fd." (diff) | |
parent | Expose PngHandler via resources.h. (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | minui/include/private/resources.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/minui/include/private/resources.h b/minui/include/private/resources.h new file mode 100644 index 000000000..2a83a1028 --- /dev/null +++ b/minui/include/private/resources.h @@ -0,0 +1,84 @@ +/* + * Copyright (C) 2018 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. + */ + +#pragma once + +#include <stdio.h> + +#include <memory> +#include <string> + +#include <png.h> + +// This class handles the PNG file parsing. It also holds the ownership of the PNG pointer and the +// opened file pointer. Both will be destroyed / closed when this object goes out of scope. +class PngHandler { + public: + // Constructs an instance by loading the PNG file from '/res/images/<name>.png', or '<name>'. + PngHandler(const std::string& name); + + ~PngHandler(); + + png_uint_32 width() const { + return width_; + } + + png_uint_32 height() const { + return height_; + } + + png_byte channels() const { + return channels_; + } + + int bit_depth() const { + return bit_depth_; + } + + int color_type() const { + return color_type_; + } + + png_structp png_ptr() const { + return png_ptr_; + } + + png_infop info_ptr() const { + return info_ptr_; + } + + int error_code() const { + return error_code_; + }; + + operator bool() const { + return error_code_ == 0; + } + + private: + png_structp png_ptr_{ nullptr }; + png_infop info_ptr_{ nullptr }; + png_uint_32 width_; + png_uint_32 height_; + png_byte channels_; + int bit_depth_; + int color_type_; + + // The |error_code_| is set to a negative value if an error occurs when opening the png file. + int error_code_{ 0 }; + // After initialization, we'll keep the file pointer open before destruction of PngHandler. + std::unique_ptr<FILE, decltype(&fclose)> png_fp_{ nullptr, fclose }; +}; |