mirror of
https://github.com/OpenRCT2/OpenRCT2
synced 2026-01-19 04:53:12 +01:00
642 lines
18 KiB
C++
642 lines
18 KiB
C++
/*****************************************************************************
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* Copyright (c) 2014-2018 OpenRCT2 developers
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*
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* For a complete list of all authors, please refer to contributors.md
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* Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is licensed under the GNU General Public License version 3.
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*****************************************************************************/
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#include "ImageImporter.h"
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#include "../core/Imaging.h"
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#include <cstring>
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#include <stdexcept>
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#include <string>
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using namespace OpenRCT2::Drawing;
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using ImportResult = ImageImporter::ImportResult;
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constexpr int32_t PALETTE_TRANSPARENT = -1;
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ImportResult ImageImporter::Import(
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const Image& image, int32_t offsetX, int32_t offsetY, IMPORT_FLAGS flags, IMPORT_MODE mode) const
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{
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if (image.Width > 256 || image.Height > 256)
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{
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throw std::invalid_argument("Only images 256x256 or less are supported.");
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}
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if ((flags & IMPORT_FLAGS::KEEP_PALETTE) && image.Depth != 8)
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{
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throw std::invalid_argument("Image is not palletted, it has bit depth of " + std::to_string(image.Depth));
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}
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const auto width = image.Width;
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const auto height = image.Height;
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auto pixels = GetPixels(image.Pixels.data(), width, height, flags, mode);
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auto [buffer, bufferLength] = flags & IMPORT_FLAGS::RLE ? EncodeRLE(pixels.data(), width, height)
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: EncodeRaw(pixels.data(), width, height);
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rct_g1_element outElement;
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outElement.offset = (uint8_t*)buffer;
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outElement.width = width;
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outElement.height = height;
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outElement.flags = (flags & IMPORT_FLAGS::RLE ? G1_FLAG_RLE_COMPRESSION : G1_FLAG_BMP);
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outElement.x_offset = offsetX;
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outElement.y_offset = offsetY;
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outElement.zoomed_offset = 0;
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ImportResult result;
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result.Element = outElement;
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result.Buffer = buffer;
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result.BufferLength = bufferLength;
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return result;
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}
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std::vector<int32_t> ImageImporter::GetPixels(
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const uint8_t* pixels, uint32_t width, uint32_t height, IMPORT_FLAGS flags, IMPORT_MODE mode)
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{
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std::vector<int32_t> buffer;
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buffer.reserve(width * height);
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// A larger range is needed for proper dithering
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auto palettedSrc = pixels;
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std::unique_ptr<int16_t[]> rgbaSrcBuffer;
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if (!(flags & IMPORT_FLAGS::KEEP_PALETTE))
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{
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rgbaSrcBuffer = std::make_unique<int16_t[]>(height * width * 4);
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}
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auto rgbaSrc = rgbaSrcBuffer.get();
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if (!(flags & IMPORT_FLAGS::KEEP_PALETTE))
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{
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for (uint32_t x = 0; x < height * width * 4; x++)
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{
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rgbaSrc[x] = (int16_t)pixels[x];
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}
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}
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for (uint32_t y = 0; y < height; y++)
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{
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for (uint32_t x = 0; x < width; x++)
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{
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int32_t paletteIndex;
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if (flags & IMPORT_FLAGS::KEEP_PALETTE)
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{
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paletteIndex = *palettedSrc;
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// The 1st index is always transparent
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if (paletteIndex == 0)
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{
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paletteIndex = PALETTE_TRANSPARENT;
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}
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}
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else
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{
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paletteIndex = CalculatePaletteIndex(mode, rgbaSrc, x, y, width, height);
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}
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rgbaSrc += 4;
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palettedSrc += 1;
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buffer.push_back(paletteIndex);
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}
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}
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return buffer;
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}
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std::tuple<void*, size_t> ImageImporter::EncodeRaw(const int32_t* pixels, uint32_t width, uint32_t height)
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{
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auto bufferLength = width * height;
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auto buffer = (uint8_t*)std::malloc(bufferLength);
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for (size_t i = 0; i < bufferLength; i++)
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{
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auto p = pixels[i];
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buffer[i] = (p == PALETTE_TRANSPARENT ? 0 : (uint8_t)p);
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}
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return std::make_tuple(buffer, bufferLength);
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}
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std::tuple<void*, size_t> ImageImporter::EncodeRLE(const int32_t* pixels, uint32_t width, uint32_t height)
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{
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struct RLECode
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{
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uint8_t NumPixels{};
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uint8_t OffsetX{};
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};
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auto src = pixels;
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auto buffer = (uint8_t*)std::malloc((height * 2) + (width * height * 16));
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if (buffer == nullptr)
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{
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throw std::bad_alloc();
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}
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std::memset(buffer, 0, (height * 2) + (width * height * 16));
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auto yOffsets = (uint16_t*)buffer;
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auto dst = buffer + (height * 2);
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for (uint32_t y = 0; y < height; y++)
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{
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yOffsets[y] = (uint16_t)(dst - buffer);
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auto previousCode = (RLECode*)nullptr;
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auto currentCode = (RLECode*)dst;
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dst += 2;
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auto startX = 0;
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auto npixels = 0;
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bool pushRun = false;
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for (uint32_t x = 0; x < width; x++)
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{
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int32_t paletteIndex = *src++;
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if (paletteIndex == PALETTE_TRANSPARENT)
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{
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if (npixels != 0)
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{
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x--;
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src--;
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pushRun = true;
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}
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}
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else
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{
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if (npixels == 0)
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{
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startX = x;
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}
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npixels++;
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*dst++ = (uint8_t)paletteIndex;
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}
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if (npixels == 127 || x == width - 1)
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{
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pushRun = true;
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}
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if (pushRun)
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{
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if (npixels > 0)
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{
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previousCode = currentCode;
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currentCode->NumPixels = npixels;
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currentCode->OffsetX = startX;
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if (x == width - 1)
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{
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currentCode->NumPixels |= 0x80;
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}
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currentCode = (RLECode*)dst;
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dst += 2;
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}
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else
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{
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if (previousCode == nullptr)
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{
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currentCode->NumPixels = 0x80;
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currentCode->OffsetX = 0;
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}
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else
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{
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previousCode->NumPixels |= 0x80;
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dst -= 2;
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}
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}
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startX = 0;
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npixels = 0;
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pushRun = false;
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}
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}
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}
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auto bufferLength = (size_t)(dst - buffer);
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buffer = (uint8_t*)realloc(buffer, bufferLength);
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if (buffer == nullptr)
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{
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throw std::bad_alloc();
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}
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return std::make_tuple(buffer, bufferLength);
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}
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int32_t ImageImporter::CalculatePaletteIndex(
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IMPORT_MODE mode, int16_t* rgbaSrc, int32_t x, int32_t y, int32_t width, int32_t height)
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{
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auto palette = StandardPalette;
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auto paletteIndex = GetPaletteIndex(palette, rgbaSrc);
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if (mode == IMPORT_MODE::CLOSEST || mode == IMPORT_MODE::DITHERING)
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{
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if (paletteIndex == PALETTE_TRANSPARENT && !IsTransparentPixel(rgbaSrc))
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{
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paletteIndex = GetClosestPaletteIndex(palette, rgbaSrc);
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}
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}
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if (mode == IMPORT_MODE::DITHERING)
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{
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if (!IsTransparentPixel(rgbaSrc) && IsChangablePixel(GetPaletteIndex(palette, rgbaSrc)))
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{
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auto dr = rgbaSrc[0] - (int16_t)(palette[paletteIndex].Red);
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auto dg = rgbaSrc[1] - (int16_t)(palette[paletteIndex].Green);
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auto db = rgbaSrc[2] - (int16_t)(palette[paletteIndex].Blue);
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if (x + 1 < width)
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{
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if (!IsTransparentPixel(rgbaSrc + 4) && IsChangablePixel(GetPaletteIndex(palette, rgbaSrc + 4)))
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{
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// Right
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rgbaSrc[4] += dr * 7 / 16;
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rgbaSrc[5] += dg * 7 / 16;
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rgbaSrc[6] += db * 7 / 16;
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}
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}
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if (y + 1 < height)
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{
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if (x > 0)
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{
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if (!IsTransparentPixel(rgbaSrc + 4 * (width - 1))
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&& IsChangablePixel(GetPaletteIndex(palette, rgbaSrc + 4 * (width - 1))))
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{
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// Bottom left
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rgbaSrc[4 * (width - 1)] += dr * 3 / 16;
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rgbaSrc[4 * (width - 1) + 1] += dg * 3 / 16;
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rgbaSrc[4 * (width - 1) + 2] += db * 3 / 16;
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}
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}
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// Bottom
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if (!IsTransparentPixel(rgbaSrc + 4 * width) && IsChangablePixel(GetPaletteIndex(palette, rgbaSrc + 4 * width)))
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{
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rgbaSrc[4 * width] += dr * 5 / 16;
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rgbaSrc[4 * width + 1] += dg * 5 / 16;
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rgbaSrc[4 * width + 2] += db * 5 / 16;
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}
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if (x + 1 < width)
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{
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if (!IsTransparentPixel(rgbaSrc + 4 * (width + 1))
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&& IsChangablePixel(GetPaletteIndex(palette, rgbaSrc + 4 * (width + 1))))
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{
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// Bottom right
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rgbaSrc[4 * (width + 1)] += dr * 1 / 16;
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rgbaSrc[4 * (width + 1) + 1] += dg * 1 / 16;
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rgbaSrc[4 * (width + 1) + 2] += db * 1 / 16;
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}
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}
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}
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}
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}
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return paletteIndex;
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}
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int32_t ImageImporter::GetPaletteIndex(const PaletteBGRA* palette, int16_t* colour)
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{
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if (!IsTransparentPixel(colour))
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{
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for (int32_t i = 0; i < 256; i++)
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{
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if ((int16_t)(palette[i].Red) == colour[0] && (int16_t)(palette[i].Green) == colour[1]
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&& (int16_t)(palette[i].Blue) == colour[2])
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{
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return i;
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}
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}
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}
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return PALETTE_TRANSPARENT;
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}
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bool ImageImporter::IsTransparentPixel(const int16_t* colour)
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{
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return colour[3] < 128;
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}
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/**
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* @returns true if pixel index is an index not used for remapping.
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*/
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bool ImageImporter::IsChangablePixel(int32_t paletteIndex)
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{
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if (paletteIndex == PALETTE_TRANSPARENT)
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return true;
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if (paletteIndex == 0)
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return false;
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if (paletteIndex >= 203 && paletteIndex < 214)
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return false;
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if (paletteIndex == 226)
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return false;
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if (paletteIndex >= 227 && paletteIndex < 229)
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return false;
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if (paletteIndex >= 243)
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return false;
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return true;
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}
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int32_t ImageImporter::GetClosestPaletteIndex(const PaletteBGRA* palette, const int16_t* colour)
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{
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auto smallestError = (uint32_t)-1;
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auto bestMatch = PALETTE_TRANSPARENT;
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for (int32_t x = 0; x < 256; x++)
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{
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if (IsChangablePixel(x))
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{
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uint32_t error = ((int16_t)(palette[x].Red) - colour[0]) * ((int16_t)(palette[x].Red) - colour[0])
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+ ((int16_t)(palette[x].Green) - colour[1]) * ((int16_t)(palette[x].Green) - colour[1])
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+ ((int16_t)(palette[x].Blue) - colour[2]) * ((int16_t)(palette[x].Blue) - colour[2]);
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if (smallestError == (uint32_t)-1 || smallestError > error)
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{
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bestMatch = x;
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smallestError = error;
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}
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}
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}
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return bestMatch;
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}
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const PaletteBGRA ImageImporter::StandardPalette[256] = {
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// 0 (unused)
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{ 0, 0, 0, 255 },
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// 1 - 9 (misc. e.g. font and water)
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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{ 0, 0, 0, 255 },
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//
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{ 35, 35, 23, 255 },
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{ 51, 51, 35, 255 },
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{ 67, 67, 47, 255 },
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{ 83, 83, 63, 255 },
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{ 99, 99, 75, 255 },
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{ 115, 115, 91, 255 },
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{ 131, 131, 111, 255 },
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{ 151, 151, 131, 255 },
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{ 175, 175, 159, 255 },
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{ 195, 195, 183, 255 },
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{ 219, 219, 211, 255 },
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{ 243, 243, 239, 255 },
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{ 0, 47, 51, 255 },
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{ 0, 59, 63, 255 },
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{ 11, 75, 79, 255 },
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{ 19, 91, 91, 255 },
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{ 31, 107, 107, 255 },
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{ 47, 123, 119, 255 },
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{ 59, 139, 135, 255 },
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{ 79, 155, 151, 255 },
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{ 95, 175, 167, 255 },
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{ 115, 191, 187, 255 },
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{ 139, 207, 203, 255 },
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{ 163, 227, 223, 255 },
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{ 7, 43, 67, 255 },
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{ 11, 59, 87, 255 },
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{ 23, 75, 111, 255 },
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{ 31, 87, 127, 255 },
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{ 39, 99, 143, 255 },
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{ 51, 115, 159, 255 },
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{ 67, 131, 179, 255 },
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{ 87, 151, 191, 255 },
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{ 111, 175, 203, 255 },
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{ 135, 199, 219, 255 },
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{ 163, 219, 231, 255 },
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{ 195, 239, 247, 255 },
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{ 0, 27, 71, 255 },
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{ 0, 43, 95, 255 },
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{ 0, 63, 119, 255 },
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{ 7, 83, 143, 255 },
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{ 7, 111, 167, 255 },
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{ 15, 139, 191, 255 },
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{ 19, 167, 215, 255 },
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{ 27, 203, 243, 255 },
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{ 47, 231, 255, 255 },
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{ 95, 243, 255, 255 },
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{ 143, 251, 255, 255 },
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{ 195, 255, 255, 255 },
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{ 0, 0, 35, 255 },
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{ 0, 0, 79, 255 },
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{ 7, 7, 95, 255 },
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{ 15, 15, 111, 255 },
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{ 27, 27, 127, 255 },
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{ 39, 39, 143, 255 },
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{ 59, 59, 163, 255 },
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{ 79, 79, 179, 255 },
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{ 103, 103, 199, 255 },
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{ 127, 127, 215, 255 },
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{ 159, 159, 235, 255 },
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{ 191, 191, 255, 255 },
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{ 19, 51, 27, 255 },
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{ 23, 63, 35, 255 },
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{ 31, 79, 47, 255 },
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{ 39, 95, 59, 255 },
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{ 43, 111, 71, 255 },
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{ 51, 127, 87, 255 },
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{ 59, 143, 99, 255 },
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{ 67, 155, 115, 255 },
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{ 75, 171, 131, 255 },
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{ 83, 187, 147, 255 },
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{ 95, 203, 163, 255 },
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{ 103, 219, 183, 255 },
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{ 27, 55, 31, 255 },
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{ 35, 71, 47, 255 },
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{ 43, 83, 59, 255 },
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{ 55, 99, 75, 255 },
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{ 67, 111, 91, 255 },
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{ 79, 135, 111, 255 },
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{ 95, 159, 135, 255 },
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{ 111, 183, 159, 255 },
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{ 127, 207, 183, 255 },
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{ 147, 219, 195, 255 },
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{ 167, 231, 207, 255 },
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{ 191, 247, 223, 255 },
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{ 0, 63, 15, 255 },
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{ 0, 83, 19, 255 },
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{ 0, 103, 23, 255 },
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{ 0, 123, 31, 255 },
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{ 7, 143, 39, 255 },
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{ 23, 159, 55, 255 },
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{ 39, 175, 71, 255 },
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{ 63, 191, 91, 255 },
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{ 87, 207, 111, 255 },
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{ 115, 223, 139, 255 },
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{ 143, 239, 163, 255 },
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{ 179, 255, 195, 255 },
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{ 19, 43, 79, 255 },
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{ 27, 55, 99, 255 },
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{ 43, 71, 119, 255 },
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{ 59, 87, 139, 255 },
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{ 67, 99, 167, 255 },
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{ 83, 115, 187, 255 },
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{ 99, 131, 207, 255 },
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{ 115, 151, 215, 255 },
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{ 131, 171, 227, 255 },
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{ 151, 191, 239, 255 },
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{ 171, 207, 247, 255 },
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{ 195, 227, 255, 255 },
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{ 55, 19, 15, 255 },
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{ 87, 43, 39, 255 },
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{ 103, 55, 51, 255 },
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{ 119, 67, 63, 255 },
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{ 139, 83, 83, 255 },
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{ 155, 99, 99, 255 },
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{ 175, 119, 119, 255 },
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{ 191, 139, 139, 255 },
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{ 207, 159, 159, 255 },
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{ 223, 183, 183, 255 },
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{ 239, 211, 211, 255 },
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{ 255, 239, 239, 255 },
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{ 111, 27, 0, 255 },
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{ 151, 39, 0, 255 },
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{ 167, 51, 7, 255 },
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{ 187, 67, 15, 255 },
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{ 203, 83, 27, 255 },
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{ 223, 103, 43, 255 },
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{ 227, 135, 67, 255 },
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{ 231, 163, 91, 255 },
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{ 239, 187, 119, 255 },
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{ 243, 211, 143, 255 },
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{ 251, 231, 175, 255 },
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{ 255, 247, 215, 255 },
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{ 15, 43, 11, 255 },
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{ 23, 55, 15, 255 },
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{ 31, 71, 23, 255 },
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{ 43, 83, 35, 255 },
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{ 59, 99, 47, 255 },
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{ 75, 115, 59, 255 },
|
|
{ 95, 135, 79, 255 },
|
|
{ 119, 155, 99, 255 },
|
|
{ 139, 175, 123, 255 },
|
|
{ 167, 199, 147, 255 },
|
|
{ 195, 219, 175, 255 },
|
|
{ 223, 243, 207, 255 },
|
|
{ 95, 0, 63, 255 },
|
|
{ 115, 7, 75, 255 },
|
|
{ 127, 15, 83, 255 },
|
|
{ 143, 31, 95, 255 },
|
|
{ 155, 43, 107, 255 },
|
|
{ 171, 63, 123, 255 },
|
|
{ 187, 83, 135, 255 },
|
|
{ 199, 103, 155, 255 },
|
|
{ 215, 127, 171, 255 },
|
|
{ 231, 155, 191, 255 },
|
|
{ 243, 195, 215, 255 },
|
|
{ 255, 235, 243, 255 },
|
|
{ 0, 0, 63, 255 },
|
|
{ 0, 0, 87, 255 },
|
|
{ 0, 0, 115, 255 },
|
|
{ 0, 0, 143, 255 },
|
|
{ 0, 0, 171, 255 },
|
|
{ 0, 0, 199, 255 },
|
|
{ 0, 7, 227, 255 },
|
|
{ 0, 7, 255, 255 },
|
|
{ 67, 79, 255, 255 },
|
|
{ 115, 123, 255, 255 },
|
|
{ 163, 171, 255, 255 },
|
|
{ 215, 219, 255, 255 },
|
|
{ 0, 39, 79, 255 },
|
|
{ 0, 51, 111, 255 },
|
|
{ 0, 63, 147, 255 },
|
|
{ 0, 71, 183, 255 },
|
|
{ 0, 79, 219, 255 },
|
|
{ 0, 83, 255, 255 },
|
|
{ 23, 111, 255, 255 },
|
|
{ 51, 139, 255, 255 },
|
|
{ 79, 163, 255, 255 },
|
|
{ 107, 183, 255, 255 },
|
|
{ 135, 203, 255, 255 },
|
|
{ 163, 219, 255, 255 },
|
|
{ 47, 51, 0, 255 },
|
|
{ 55, 63, 0, 255 },
|
|
{ 67, 75, 0, 255 },
|
|
{ 79, 87, 0, 255 },
|
|
{ 99, 107, 7, 255 },
|
|
{ 119, 127, 23, 255 },
|
|
{ 143, 147, 43, 255 },
|
|
{ 163, 167, 71, 255 },
|
|
{ 187, 187, 99, 255 },
|
|
{ 207, 207, 131, 255 },
|
|
{ 231, 231, 171, 255 },
|
|
{ 255, 255, 207, 255 },
|
|
|
|
// 203 - 214 (Secondary remap)
|
|
{ 27, 0, 63, 255 },
|
|
{ 51, 0, 103, 255 },
|
|
{ 63, 11, 123, 255 },
|
|
{ 79, 23, 143, 255 },
|
|
{ 95, 31, 163, 255 },
|
|
{ 111, 39, 183, 255 },
|
|
{ 143, 59, 219, 255 },
|
|
{ 171, 91, 239, 255 },
|
|
{ 187, 119, 243, 255 },
|
|
{ 203, 151, 247, 255 },
|
|
{ 223, 183, 251, 255 },
|
|
{ 239, 215, 255, 255 },
|
|
|
|
// 214 - 225 (Brown)
|
|
{ 0, 19, 39, 255 },
|
|
{ 7, 31, 55, 255 },
|
|
{ 15, 47, 71, 255 },
|
|
{ 31, 63, 91, 255 },
|
|
{ 51, 83, 107, 255 },
|
|
{ 75, 103, 123, 255 },
|
|
{ 107, 127, 143, 255 },
|
|
{ 127, 147, 163, 255 },
|
|
{ 147, 171, 187, 255 },
|
|
{ 171, 195, 207, 255 },
|
|
{ 195, 219, 231, 255 },
|
|
{ 223, 243, 255, 255 },
|
|
|
|
// 226 (unknown)
|
|
{ 75, 75, 55, 255 },
|
|
|
|
// 227 - 229 (tertiary remap)
|
|
{ 0, 183, 255, 255 },
|
|
{ 0, 219, 255, 255 },
|
|
{ 0, 255, 255, 255 },
|
|
|
|
// 230 - 239 (water)
|
|
{ 99, 107, 7, 255 },
|
|
{ 99, 107, 7, 255 },
|
|
{ 135, 143, 39, 255 },
|
|
{ 123, 131, 27, 255 },
|
|
{ 99, 107, 7, 255 },
|
|
{ 151, 155, 55, 255 },
|
|
{ 151, 155, 55, 255 },
|
|
{ 227, 227, 155, 255 },
|
|
{ 203, 203, 115, 255 },
|
|
{ 151, 155, 55, 255 },
|
|
|
|
// 240 - 242 (chain lift)
|
|
{ 91, 91, 67, 255 },
|
|
{ 107, 107, 83, 255 },
|
|
{ 123, 123, 99, 255 },
|
|
|
|
// Old 243 - 245, changed to nice shade remap below
|
|
// { 47, 47, 47, 255 },
|
|
// { 47, 47, 47, 255 },
|
|
// { 47, 71, 87, 255 },
|
|
|
|
// 243 to 254 (primary remap)
|
|
{ 47, 51, 111, 255 },
|
|
{ 47, 55, 131, 255 },
|
|
{ 51, 63, 151, 255 },
|
|
{ 51, 67, 171, 255 },
|
|
{ 47, 75, 191, 255 },
|
|
{ 43, 79, 211, 255 },
|
|
{ 35, 87, 231, 255 },
|
|
{ 31, 95, 255, 255 },
|
|
{ 39, 127, 255, 255 },
|
|
{ 51, 155, 255, 255 },
|
|
{ 63, 183, 255, 255 },
|
|
{ 75, 207, 255, 255 },
|
|
|
|
// 255 (unused?)
|
|
{ 0, 0, 0, 255 },
|
|
};
|