282 lines
7.0 KiB
C++
Executable File
282 lines
7.0 KiB
C++
Executable File
#include "TextureManager.h"
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#ifdef PNG_ENABLED
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#include "png.h"
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#endif
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namespace ZL
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{
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Texture::Texture(const TextureDataStruct& texData)
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{
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width = texData.width;
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height = texData.height;
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glGenTextures(1, &texID);
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if (texID == 0)
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{
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throw std::runtime_error("glGenTextures did not work");
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}
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glBindTexture(GL_TEXTURE_2D, texID);
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CheckGlError();
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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CheckGlError();
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//This should be only for Windows
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//glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
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CheckGlError();
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if (texData.bitSize == TextureDataStruct::BS_24BIT)
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{
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, static_cast<GLsizei>(texData.width), static_cast<GLsizei>(texData.height), 0, GL_RGB, GL_UNSIGNED_BYTE, &texData.data[0]);
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}
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else
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{
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, static_cast<GLsizei>(texData.width), static_cast<GLsizei>(texData.height), 0, GL_RGBA, GL_UNSIGNED_BYTE, &texData.data[0]);
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}
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CheckGlError();
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}
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Texture::~Texture()
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{
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glDeleteTextures(1, &texID);
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texID = 0;
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}
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GLuint Texture::getTexID()
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{
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return texID;
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}
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size_t Texture::getWidth()
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{
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return width;
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}
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size_t Texture::getHeight()
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{
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return height;
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}
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TextureDataStruct CreateTextureDataFromBmp24(const std::string& fullFileName, const std::string& ZIPFileName)
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{
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TextureDataStruct texData;
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std::vector<char> fileArr;
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if (!ZIPFileName.empty()) fileArr = readFileFromZIP(fullFileName, ZIPFileName);
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else fileArr = readFile(fullFileName);
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size_t fileSize = fileArr.size();
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if (fileSize < 22)
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{
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throw std::runtime_error("File is too short or not correct!");
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}
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//This refers to BITMAPV5HEADER
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texData.width = *reinterpret_cast<uint32_t*>(&fileArr[18]);
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texData.height = *reinterpret_cast<uint32_t*>(&fileArr[22]);
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texData.bitSize = TextureDataStruct::BS_24BIT;
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size_t dataSize = texData.width * texData.height * 3;
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texData.data.resize(dataSize);
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size_t pos = *reinterpret_cast<uint32_t*>(&fileArr[10]);
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size_t x = 0;
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for (size_t i = 0; i < texData.width; i++)
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for (size_t j = 0; j < texData.height; j++)
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{
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if (pos + 3 > fileSize)
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{
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throw std::runtime_error("File is too short!");
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}
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x = (i * texData.height + j) + (i * texData.height + j) + (i * texData.height + j);
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texData.data[x + 2] = fileArr[pos++];
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texData.data[x + 1] = fileArr[pos++];
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texData.data[x + 0] = fileArr[pos++];
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}
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return texData;
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}
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TextureDataStruct CreateTextureDataFromBmp32(const std::string& fullFileName, const std::string& ZIPFileName)
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{
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TextureDataStruct texData;
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std::vector<char> fileArr;
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if (!ZIPFileName.empty()) fileArr = readFileFromZIP(fullFileName, ZIPFileName);
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else fileArr = readFile(fullFileName);
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size_t fileSize = fileArr.size();
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if (fileSize < 22)
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{
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throw std::runtime_error("File is too short or not correct!");
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}
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//This refers to BITMAPV5HEADER
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texData.width = *reinterpret_cast<uint32_t*>(&fileArr[18]);
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texData.height = *reinterpret_cast<uint32_t*>(&fileArr[22]);
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texData.bitSize = TextureDataStruct::BS_32BIT;
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size_t dataSize = texData.width * texData.height * 4;
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texData.data.resize(dataSize);
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size_t pos = *reinterpret_cast<uint32_t*>(&fileArr[10]);
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size_t x = 0;
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for (size_t i = 0; i < texData.width; i++)
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for (size_t j = 0; j < texData.height; j++)
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{
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if (pos + 4 > fileSize)
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{
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throw std::runtime_error("File is too short!");
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}
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x = (i * texData.height + j) + (i * texData.height + j) + (i * texData.height + j) + (i * texData.height + j);
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texData.data[x + 2] = fileArr[pos++];
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texData.data[x + 1] = fileArr[pos++];
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texData.data[x + 0] = fileArr[pos++];
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texData.data[x + 3] = fileArr[pos++];
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}
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return texData;
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}
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#ifdef PNG_ENABLED
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TextureDataStruct CreateTextureDataFromPng(const std::string& fullFileName)
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{
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TextureDataStruct texData;
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FILE* file = fopen(fullFileName.c_str(), "rb");
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if (!file) {
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fclose(file);
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throw std::runtime_error("Could not open file " + fullFileName);
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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) {
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fclose(file);
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throw std::runtime_error("Could not create PNG read structure");
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}
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png_infop info = png_create_info_struct(png);
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if (!info) {
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fclose(file);
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png_destroy_read_struct(&png, nullptr, nullptr);
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throw std::runtime_error("Could not create PNG info structure");
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}
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if (setjmp(png_jmpbuf(png))) {
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png_destroy_read_struct(&png, &info, nullptr);
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fclose(file);
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throw std::runtime_error("Error during PNG read");
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}
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png_init_io(png, file);
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png_read_info(png, info);
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texData.width = png_get_image_width(png, info);
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texData.height = png_get_image_height(png, info);
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png_byte color_type = png_get_color_type(png, info);
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png_byte bit_depth = png_get_bit_depth(png, info);
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if (bit_depth == 16)
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png_set_strip_16(png);
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if (color_type == PNG_COLOR_TYPE_PALETTE)
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png_set_palette_to_rgb(png);
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if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 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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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 (color_type == PNG_COLOR_TYPE_GRAY ||
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color_type == 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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png_bytep* row_pointers = (png_bytep*)malloc(sizeof(png_bytep) * texData.height);
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for (int y = 0; y < texData.height; y++) {
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row_pointers[y] = (png_byte*)malloc(png_get_rowbytes(png, info));
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}
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png_read_image(png, row_pointers);
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fclose(file);
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bool has_alpha = (color_type & PNG_COLOR_MASK_ALPHA) || (png_get_valid(png, info, PNG_INFO_tRNS));
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size_t dataSize;
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if (has_alpha)
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{
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texData.bitSize = TextureDataStruct::BS_32BIT;
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}
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else
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{
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texData.bitSize = TextureDataStruct::BS_24BIT;
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}
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int channels = has_alpha ? 4 : 3;
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dataSize = texData.width * texData.height * channels;
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texData.data.resize(dataSize);
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for (int y = 0; y < texData.height; y++) {
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png_bytep row = row_pointers[y];
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for (int x = 0; x < texData.width; x++) {
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png_bytep px = &(row[x * 4]);
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texData.data[(y * texData.width + x) * channels + 0] = px[0]; // R
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texData.data[(y * texData.width + x) * channels + 1] = px[1]; // G
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texData.data[(y * texData.width + x) * channels + 2] = px[2]; // B
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if (has_alpha) {
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texData.data[(y * texData.width + x) * channels + 3] = px[3]; // A
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}
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}
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free(row_pointers[y]);
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}
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free(row_pointers);
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png_destroy_read_struct(&png, &info, nullptr);
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return texData;
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}
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#endif
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} |