507 lines
12 KiB
C++
507 lines
12 KiB
C++
#include "ImageBackend.h"
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#include <cassert>
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#include <cstdlib>
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#include <png.h>
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#include <stdexcept>
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#include "Utils/StringHelper.h"
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#include "WarningHandler.h"
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/* ImageBackend */
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ImageBackend::~ImageBackend()
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{
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FreeImageData();
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}
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void ImageBackend::ReadPng(const char* filename)
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{
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FreeImageData();
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FILE* fp = fopen(filename, "rb");
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if (fp == nullptr)
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{
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std::string errorHeader = StringHelper::Sprintf("could not open file '%s'", filename);
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HANDLE_ERROR(WarningType::InvalidPNG, errorHeader, "");
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}
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png_structp png = png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
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if (png == nullptr)
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{
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HANDLE_ERROR(WarningType::InvalidPNG, "could not create png struct", "");
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}
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png_infop info = png_create_info_struct(png);
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if (info == nullptr)
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{
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HANDLE_ERROR(WarningType::InvalidPNG, "could not create png info", "");
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}
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if (setjmp(png_jmpbuf(png)))
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{
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// TODO: better warning explanation
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HANDLE_ERROR(WarningType::InvalidPNG, "setjmp(png_jmpbuf(png))", "");
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}
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png_init_io(png, fp);
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png_read_info(png, info);
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width = png_get_image_width(png, info);
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height = png_get_image_height(png, info);
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colorType = png_get_color_type(png, info);
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bitDepth = png_get_bit_depth(png, info);
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#ifdef TEXTURE_DEBUG
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printf("Width: %u\n", width);
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printf("Height: %u\n", height);
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printf("ColorType: ");
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switch (colorType)
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{
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case PNG_COLOR_TYPE_RGBA:
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printf("PNG_COLOR_TYPE_RGBA\n");
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break;
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case PNG_COLOR_TYPE_RGB:
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printf("PNG_COLOR_TYPE_RGB\n");
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break;
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case PNG_COLOR_TYPE_PALETTE:
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printf("PNG_COLOR_TYPE_PALETTE\n");
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break;
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default:
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printf("%u\n", colorType);
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break;
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}
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printf("BitDepth: %u\n", bitDepth);
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printf("\n");
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#endif
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// Read any color_type into 8bit depth, RGBA format.
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// See http://www.libpng.org/pub/png/libpng-manual.txt
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if (bitDepth == 16)
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png_set_strip_16(png);
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if (colorType == PNG_COLOR_TYPE_PALETTE)
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{
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// png_set_palette_to_rgb(png);
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isColorIndexed = true;
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}
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// PNG_COLOR_TYPE_GRAY_ALPHA is always 8 or 16bit depth.
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if (colorType == PNG_COLOR_TYPE_GRAY && bitDepth < 8)
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png_set_expand_gray_1_2_4_to_8(png);
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/*if (png_get_valid(png, info, PNG_INFO_tRNS))
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png_set_tRNS_to_alpha(png);*/
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// These color_type don't have an alpha channel then fill it with 0xff.
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/*if(*color_type == PNG_COLOR_TYPE_RGB ||
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*color_type == PNG_COLOR_TYPE_GRAY ||
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*color_type == PNG_COLOR_TYPE_PALETTE)
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png_set_filler(png, 0xFF, PNG_FILLER_AFTER);*/
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if (colorType == PNG_COLOR_TYPE_GRAY || colorType == PNG_COLOR_TYPE_GRAY_ALPHA)
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png_set_gray_to_rgb(png);
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png_read_update_info(png, info);
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size_t rowBytes = png_get_rowbytes(png, info);
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pixelMatrix = (uint8_t**)malloc(sizeof(uint8_t*) * height);
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for (size_t y = 0; y < height; y++)
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{
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pixelMatrix[y] = (uint8_t*)malloc(rowBytes);
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}
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png_read_image(png, pixelMatrix);
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#ifdef TEXTURE_DEBUG
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printf("rowBytes: %zu\n", rowBytes);
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size_t bytePerPixel = GetBytesPerPixel();
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printf("imgData\n");
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for (size_t y = 0; y < height; y++)
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{
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for (size_t x = 0; x < width; x++)
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{
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for (size_t z = 0; z < bytePerPixel; z++)
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{
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printf("%02X ", pixelMatrix[y][x * bytePerPixel + z]);
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}
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printf(" ");
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}
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printf("\n");
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}
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printf("\n");
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#endif
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fclose(fp);
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png_destroy_read_struct(&png, &info, nullptr);
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hasImageData = true;
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}
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void ImageBackend::ReadPng(const fs::path& filename)
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{
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ReadPng(filename.string().c_str());
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}
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void ImageBackend::WritePng(const char* filename)
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{
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assert(hasImageData);
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FILE* fp = fopen(filename, "wb");
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if (fp == nullptr)
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{
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std::string errorHeader =
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StringHelper::Sprintf("could not open file '%s' in write mode", filename);
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HANDLE_ERROR(WarningType::InvalidPNG, errorHeader, "");
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}
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png_structp png = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
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if (png == nullptr)
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{
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HANDLE_ERROR(WarningType::InvalidPNG, "could not create png struct", "");
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}
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png_infop info = png_create_info_struct(png);
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if (info == nullptr)
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{
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HANDLE_ERROR(WarningType::InvalidPNG, "could not create png info", "");
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}
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if (setjmp(png_jmpbuf(png)))
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{
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// TODO: better warning description
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HANDLE_ERROR(WarningType::InvalidPNG, "setjmp(png_jmpbuf(png))", "");
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}
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png_init_io(png, fp);
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png_set_IHDR(png, info, width, height,
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bitDepth, // 8,
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colorType, // PNG_COLOR_TYPE_RGBA,
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PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
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if (isColorIndexed)
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{
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png_set_PLTE(png, info, static_cast<png_color*>(colorPalette), paletteSize);
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#ifdef TEXTURE_DEBUG
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printf("palette\n");
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png_color* aux = (png_color*)colorPalette;
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for (size_t y = 0; y < paletteSize; y++)
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{
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printf("#%02X%02X%02X ", aux[y].red, aux[y].green, aux[y].blue);
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if ((y + 1) % 8 == 0)
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printf("\n");
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}
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printf("\n");
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#endif
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png_set_tRNS(png, info, alphaPalette, paletteSize, nullptr);
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}
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png_write_info(png, info);
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// To remove the alpha channel for PNG_COLOR_TYPE_RGB format,
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// Use png_set_filler().
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// png_set_filler(png, 0, PNG_FILLER_AFTER);
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#ifdef TEXTURE_DEBUG
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size_t bytePerPixel = GetBytesPerPixel();
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printf("imgData\n");
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for (size_t y = 0; y < height; y++)
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{
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for (size_t x = 0; x < width * bytePerPixel; x++)
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{
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printf("%02X ", pixelMatrix[y][x]);
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}
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printf("\n");
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}
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printf("\n");
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#endif
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png_write_image(png, pixelMatrix);
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png_write_end(png, nullptr);
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fclose(fp);
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png_destroy_write_struct(&png, &info);
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}
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void ImageBackend::WritePng(const fs::path& filename)
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{
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// Note: The .string() is necessary for MSVC, due to the implementation of std::filesystem
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// differing from GCC. Do not remove!
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WritePng(filename.string().c_str());
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}
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void ImageBackend::SetTextureData(const std::vector<std::vector<RGBAPixel>>& texData,
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uint32_t nWidth, uint32_t nHeight, uint8_t nColorType,
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uint8_t nBitDepth)
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{
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FreeImageData();
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width = nWidth;
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height = nHeight;
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colorType = nColorType;
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bitDepth = nBitDepth;
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size_t bytePerPixel = GetBytesPerPixel();
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pixelMatrix = static_cast<uint8_t**>(malloc(sizeof(uint8_t*) * height));
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for (size_t y = 0; y < height; y++)
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{
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pixelMatrix[y] = static_cast<uint8_t*>(malloc(sizeof(uint8_t*) * width * bytePerPixel));
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for (size_t x = 0; x < width; x++)
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{
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pixelMatrix[y][x * bytePerPixel + 0] = texData.at(y).at(x).r;
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pixelMatrix[y][x * bytePerPixel + 1] = texData.at(y).at(x).g;
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pixelMatrix[y][x * bytePerPixel + 2] = texData.at(y).at(x).b;
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if (colorType == PNG_COLOR_TYPE_RGBA)
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pixelMatrix[y][x * bytePerPixel + 3] = texData.at(y).at(x).a;
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}
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}
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hasImageData = true;
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}
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void ImageBackend::InitEmptyRGBImage(uint32_t nWidth, uint32_t nHeight, bool alpha)
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{
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FreeImageData();
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width = nWidth;
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height = nHeight;
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colorType = PNG_COLOR_TYPE_RGB;
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if (alpha)
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colorType = PNG_COLOR_TYPE_RGBA;
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bitDepth = 8; // nBitDepth;
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size_t bytePerPixel = GetBytesPerPixel();
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pixelMatrix = static_cast<uint8_t**>(malloc(sizeof(uint8_t*) * height));
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for (size_t y = 0; y < height; y++)
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{
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pixelMatrix[y] = static_cast<uint8_t*>(calloc(width * bytePerPixel, sizeof(uint8_t*)));
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}
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hasImageData = true;
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}
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void ImageBackend::InitEmptyPaletteImage(uint32_t nWidth, uint32_t nHeight)
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{
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FreeImageData();
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width = nWidth;
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height = nHeight;
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colorType = PNG_COLOR_TYPE_PALETTE;
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bitDepth = 8;
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size_t bytePerPixel = GetBytesPerPixel();
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pixelMatrix = (uint8_t**)malloc(sizeof(uint8_t*) * height);
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for (size_t y = 0; y < height; y++)
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{
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pixelMatrix[y] = static_cast<uint8_t*>(calloc(width * bytePerPixel, sizeof(uint8_t*)));
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}
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colorPalette = calloc(paletteSize, sizeof(png_color));
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alphaPalette = static_cast<uint8_t*>(calloc(paletteSize, sizeof(uint8_t)));
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hasImageData = true;
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isColorIndexed = true;
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}
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RGBAPixel ImageBackend::GetPixel(size_t y, size_t x) const
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{
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assert(y < height);
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assert(x < width);
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assert(!isColorIndexed);
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RGBAPixel pixel;
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size_t bytePerPixel = GetBytesPerPixel();
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pixel.r = pixelMatrix[y][x * bytePerPixel + 0];
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pixel.g = pixelMatrix[y][x * bytePerPixel + 1];
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pixel.b = pixelMatrix[y][x * bytePerPixel + 2];
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if (colorType == PNG_COLOR_TYPE_RGBA)
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pixel.a = pixelMatrix[y][x * bytePerPixel + 3];
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return pixel;
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}
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uint8_t ImageBackend::GetIndexedPixel(size_t y, size_t x) const
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{
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assert(y < height);
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assert(x < width);
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assert(isColorIndexed);
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return pixelMatrix[y][x];
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}
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void ImageBackend::SetRGBPixel(size_t y, size_t x, uint8_t nR, uint8_t nG, uint8_t nB, uint8_t nA)
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{
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assert(hasImageData);
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assert(y < height);
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assert(x < width);
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size_t bytePerPixel = GetBytesPerPixel();
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pixelMatrix[y][x * bytePerPixel + 0] = nR;
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pixelMatrix[y][x * bytePerPixel + 1] = nG;
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pixelMatrix[y][x * bytePerPixel + 2] = nB;
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if (colorType == PNG_COLOR_TYPE_RGBA)
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pixelMatrix[y][x * bytePerPixel + 3] = nA;
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}
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void ImageBackend::SetGrayscalePixel(size_t y, size_t x, uint8_t grayscale, uint8_t alpha)
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{
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assert(hasImageData);
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assert(y < height);
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assert(x < width);
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size_t bytePerPixel = GetBytesPerPixel();
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pixelMatrix[y][x * bytePerPixel + 0] = grayscale;
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pixelMatrix[y][x * bytePerPixel + 1] = grayscale;
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pixelMatrix[y][x * bytePerPixel + 2] = grayscale;
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if (colorType == PNG_COLOR_TYPE_RGBA)
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pixelMatrix[y][x * bytePerPixel + 3] = alpha;
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}
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void ImageBackend::SetIndexedPixel(size_t y, size_t x, uint8_t index, uint8_t grayscale)
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{
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assert(hasImageData);
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assert(y < height);
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assert(x < width);
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size_t bytePerPixel = GetBytesPerPixel();
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pixelMatrix[y][x * bytePerPixel + 0] = index;
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assert(index < paletteSize);
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png_color* pal = static_cast<png_color*>(colorPalette);
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pal[index].red = grayscale;
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pal[index].green = grayscale;
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pal[index].blue = grayscale;
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alphaPalette[index] = 255;
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}
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void ImageBackend::SetPaletteIndex(size_t index, uint8_t nR, uint8_t nG, uint8_t nB, uint8_t nA)
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{
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assert(isColorIndexed);
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assert(index < paletteSize);
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png_color* pal = static_cast<png_color*>(colorPalette);
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pal[index].red = nR;
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pal[index].green = nG;
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pal[index].blue = nB;
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alphaPalette[index] = nA;
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}
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void ImageBackend::SetPalette(const ImageBackend& pal, uint32_t offset)
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{
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assert(isColorIndexed);
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size_t bytePerPixel = pal.GetBytesPerPixel();
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for (size_t y = 0; y < pal.height; y++)
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{
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for (size_t x = 0; x < pal.width; x++)
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{
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size_t index = y * pal.width + x;
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if (index >= paletteSize)
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{
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/*
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* Some TLUTs are bigger than 256 colors.
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* For those cases, we will only take the first 256
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* to colorize this CI texture.
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*/
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return;
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}
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uint8_t r = pal.pixelMatrix[y][x * bytePerPixel + 0];
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uint8_t g = pal.pixelMatrix[y][x * bytePerPixel + 1];
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uint8_t b = pal.pixelMatrix[y][x * bytePerPixel + 2];
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uint8_t a = pal.pixelMatrix[y][x * bytePerPixel + 3];
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SetPaletteIndex(index + offset, r, g, b, a);
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}
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}
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}
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uint32_t ImageBackend::GetWidth() const
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{
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return width;
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}
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uint32_t ImageBackend::GetHeight() const
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{
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return height;
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}
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uint8_t ImageBackend::GetColorType() const
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{
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return colorType;
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}
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uint8_t ImageBackend::GetBitDepth() const
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{
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return bitDepth;
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}
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double ImageBackend::GetBytesPerPixel() const
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{
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switch (colorType)
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{
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case PNG_COLOR_TYPE_RGBA:
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return 4 * bitDepth / 8;
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case PNG_COLOR_TYPE_RGB:
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return 3 * bitDepth / 8;
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case PNG_COLOR_TYPE_PALETTE:
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return 1 * bitDepth / 8;
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default:
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HANDLE_ERROR(WarningType::InvalidPNG, "invalid color type", "");
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}
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}
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void ImageBackend::FreeImageData()
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{
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if (hasImageData)
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{
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for (size_t y = 0; y < height; y++)
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free(pixelMatrix[y]);
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free(pixelMatrix);
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pixelMatrix = nullptr;
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}
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if (isColorIndexed)
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{
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free(colorPalette);
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free(alphaPalette);
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colorPalette = nullptr;
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alphaPalette = nullptr;
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isColorIndexed = false;
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}
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hasImageData = false;
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}
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/* RGBAPixel */
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void RGBAPixel::SetRGBA(uint8_t nR, uint8_t nG, uint8_t nB, uint8_t nA)
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{
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r = nR;
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g = nG;
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b = nB;
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a = nA;
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}
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void RGBAPixel::SetGrayscale(uint8_t grayscale, uint8_t alpha)
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{
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r = grayscale;
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g = grayscale;
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b = grayscale;
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a = alpha;
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}
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