109 lines
2.5 KiB
C++
109 lines
2.5 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include <list>
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#include <vector>
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#include "png.h"
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#include "Common/FileUtil.h"
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#include "VideoCommon/ImageWrite.h"
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bool SaveData(const char* filename, const char* data)
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{
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std::ofstream f;
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OpenFStream(f, filename, std::ios::binary);
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f << data;
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return true;
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}
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/*
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TextureToPng
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Inputs:
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data : This is an array of RGBA with 8 bits per channel. 4 bytes for each pixel.
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row_stride: Determines the amount of bytes per row of pixels.
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*/
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bool TextureToPng(u8* data, int row_stride, const std::string& filename, int width, int height, bool saveAlpha)
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{
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bool success = false;
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if (!data)
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return false;
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char title[] = "Dolphin Screenshot";
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char title_key[] = "Title";
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png_structp png_ptr = nullptr;
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png_infop info_ptr = nullptr;
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// Open file for writing (binary mode)
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File::IOFile fp(filename, "wb");
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if (!fp.IsOpen()) {
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PanicAlert("Screenshot failed: Could not open file %s %d\n", filename.c_str(), errno);
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goto finalise;
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}
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// Initialize write structure
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png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
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if (png_ptr == nullptr) {
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PanicAlert("Screenshot failed: Could not allocate write struct\n");
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goto finalise;
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}
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// Initialize info structure
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info_ptr = png_create_info_struct(png_ptr);
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if (info_ptr == nullptr) {
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PanicAlert("Screenshot failed: Could not allocate info struct\n");
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goto finalise;
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}
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// Setup Exception handling
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if (setjmp(png_jmpbuf(png_ptr))) {
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PanicAlert("Screenshot failed: Error during png creation\n");
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goto finalise;
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}
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png_init_io(png_ptr, fp.GetHandle());
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// Write header (8 bit colour depth)
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png_set_IHDR(png_ptr, info_ptr, width, height,
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8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
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PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
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png_text title_text;
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title_text.compression = PNG_TEXT_COMPRESSION_NONE;
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title_text.key = title_key;
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title_text.text = title;
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png_set_text(png_ptr, info_ptr, &title_text, 1);
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png_write_info(png_ptr, info_ptr);
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// Write image data
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for (auto y = 0; y < height; ++y)
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{
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u8* row_ptr = (u8*)data + y * row_stride;
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u8* ptr = row_ptr;
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for (auto x = 0; x < row_stride / 4; ++x)
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{
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if (!saveAlpha)
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ptr[3] = 0xff;
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ptr += 4;
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}
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png_write_row(png_ptr, row_ptr);
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}
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// End write
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png_write_end(png_ptr, nullptr);
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success = true;
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finalise:
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if (info_ptr != nullptr) png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
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if (png_ptr != nullptr) png_destroy_write_struct(&png_ptr, (png_infopp)nullptr);
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return success;
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}
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