diff options
Diffstat (limited to 'minui')
| -rw-r--r-- | minui/include/private/resources.h | 84 | ||||
| -rw-r--r-- | minui/resources.cpp | 71 |
2 files changed, 97 insertions, 58 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 }; +}; diff --git a/minui/resources.cpp b/minui/resources.cpp index 52ab60b1b..9f67cf844 100644 --- a/minui/resources.cpp +++ b/minui/resources.cpp @@ -14,6 +14,8 @@ * limitations under the License. */ +#include "private/resources.h" + #include <fcntl.h> #include <linux/fb.h> #include <linux/kd.h> @@ -48,58 +50,13 @@ static GRSurface* malloc_surface(size_t data_size) { return surface; } -// 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: - 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_; - } - - 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_; - - // The |error_code_| is set to a negative value if an error occurs when opening the png file. - int error_code_; - // After initialization, we'll keep the file pointer open before destruction of PngHandler. - std::unique_ptr<FILE, decltype(&fclose)> png_fp_; -}; - -PngHandler::PngHandler(const std::string& name) : error_code_(0), png_fp_(nullptr, fclose) { +PngHandler::PngHandler(const std::string& name) { std::string res_path = android::base::StringPrintf("/res/images/%s.png", name.c_str()); png_fp_.reset(fopen(res_path.c_str(), "rbe")); + // Try to read from |name| if the resource path does not work. + if (!png_fp_) { + png_fp_.reset(fopen(name.c_str(), "rbe")); + } if (!png_fp_) { error_code_ = -1; return; @@ -138,19 +95,17 @@ PngHandler::PngHandler(const std::string& name) : error_code_(0), png_fp_(nullpt png_set_sig_bytes(png_ptr_, sizeof(header)); png_read_info(png_ptr_, info_ptr_); - int color_type; - int bit_depth; - png_get_IHDR(png_ptr_, info_ptr_, &width_, &height_, &bit_depth, &color_type, nullptr, nullptr, + png_get_IHDR(png_ptr_, info_ptr_, &width_, &height_, &bit_depth_, &color_type_, nullptr, nullptr, nullptr); channels_ = png_get_channels(png_ptr_, info_ptr_); - if (bit_depth == 8 && channels_ == 3 && color_type == PNG_COLOR_TYPE_RGB) { + if (bit_depth_ == 8 && channels_ == 3 && color_type_ == PNG_COLOR_TYPE_RGB) { // 8-bit RGB images: great, nothing to do. - } else if (bit_depth <= 8 && channels_ == 1 && color_type == PNG_COLOR_TYPE_GRAY) { + } else if (bit_depth_ <= 8 && channels_ == 1 && color_type_ == PNG_COLOR_TYPE_GRAY) { // 1-, 2-, 4-, or 8-bit gray images: expand to 8-bit gray. png_set_expand_gray_1_2_4_to_8(png_ptr_); - } else if (bit_depth <= 8 && channels_ == 1 && color_type == PNG_COLOR_TYPE_PALETTE) { + } else if (bit_depth_ <= 8 && channels_ == 1 && color_type_ == PNG_COLOR_TYPE_PALETTE) { // paletted images: expand to 8-bit RGB. Note that we DON'T // currently expand the tRNS chunk (if any) to an alpha // channel, because minui doesn't support alpha channels in @@ -158,8 +113,8 @@ PngHandler::PngHandler(const std::string& name) : error_code_(0), png_fp_(nullpt png_set_palette_to_rgb(png_ptr_); channels_ = 3; } else { - fprintf(stderr, "minui doesn't support PNG depth %d channels %d color_type %d\n", bit_depth, - channels_, color_type); + fprintf(stderr, "minui doesn't support PNG depth %d channels %d color_type %d\n", bit_depth_, + channels_, color_type_); error_code_ = -7; } } |