386 lines
9.5 KiB
C++
386 lines
9.5 KiB
C++
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#include "texture.h"
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#include <SDL2/SDL_error.h> // Para SDL_GetError
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#include <SDL2/SDL_surface.h> // Para SDL_CreateRGBSurfaceWithFormatFrom
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#include <fstream> // Para basic_ostream, operator<<, basic_ifstream
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#include <iostream> // Para cerr, cout
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#include <stdexcept> // Para runtime_error
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#include <string> // Para char_traits, operator<<, operator+
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#include <vector> // Para vector
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#include "gif.h" // Para LoadGif, LoadPalette
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#include "stb_image.h" // Para stbi_image_free, stbi_load, STBI_rgb_a...
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#include "utils.h" // Para getFileName, printWithDots
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h" // para stbi_failure_reason, stbi_image_free
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// Constructor
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Texture::Texture(SDL_Renderer *renderer, const std::string &path)
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: renderer_(renderer),
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path_(path)
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{
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// Carga el fichero en la textura
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if (!path_.empty())
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{
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// Obtiene la extensión
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const std::string extension = path_.substr(path_.find_last_of(".") + 1);
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// .png
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if (extension == "png")
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{
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loadFromFile(path_);
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}
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// .gif
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else if (extension == "gif")
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{
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// Crea la surface desde un fichero
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surface_ = loadSurface(path_);
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// Añade la propia paleta del fichero a la lista
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addPaletteFromFile(path_);
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// setPaletteColor(0, 0, 0x00000000);
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// Crea la textura, establece el BlendMode y copia la surface a la textura
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createBlank(width_, height_, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING);
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SDL_SetTextureBlendMode(texture_, SDL_BLENDMODE_BLEND);
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flipSurface();
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}
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}
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}
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// Destructor
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Texture::~Texture()
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{
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unloadTexture();
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unloadSurface();
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palettes_.clear();
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}
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// Carga una imagen desde un fichero
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bool Texture::loadFromFile(const std::string &file_path)
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{
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if (file_path.empty())
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return false;
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int req_format = STBI_rgb_alpha;
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int width, height, orig_format;
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unsigned char *data = stbi_load(file_path.c_str(), &width, &height, &orig_format, req_format);
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if (!data)
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{
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std::cerr << "Error: Fichero no encontrado " << getFileName(file_path) << std::endl;
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throw std::runtime_error("Fichero no encontrado: " + getFileName(file_path));
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}
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else
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{
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printWithDots("Image : ", getFileName(file_path), "[ LOADED ]");
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}
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int depth, pitch;
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Uint32 pixel_format;
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/*if (req_format == STBI_rgb)
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{
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depth = 24;
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pitch = 3 * width; // 3 bytes por pixel * pixels por linea
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pixel_format = SDL_PIXELFORMAT_RGB24;
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}
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else*/
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{ // STBI_rgb_alpha (RGBA)
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depth = 32;
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pitch = 4 * width;
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pixel_format = SDL_PIXELFORMAT_RGBA32;
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}
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// Limpia
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unloadTexture();
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// La textura final
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SDL_Texture *newTexture = nullptr;
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// Carga la imagen desde una ruta específica
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auto loadedSurface = SDL_CreateRGBSurfaceWithFormatFrom(static_cast<void *>(data), width, height, depth, pitch, pixel_format);
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if (loadedSurface == nullptr)
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{
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std::cout << "Unable to load image " << file_path << std::endl;
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}
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else
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{
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// Crea la textura desde los pixels de la surface
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newTexture = SDL_CreateTextureFromSurface(renderer_, loadedSurface);
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if (newTexture == nullptr)
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{
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std::cout << "Unable to create texture from " << file_path << "! SDL Error: " << SDL_GetError() << std::endl;
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}
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else
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{
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// Obtiene las dimensiones de la imagen
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width_ = loadedSurface->w;
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height_ = loadedSurface->h;
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}
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// Elimina la textura cargada
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SDL_FreeSurface(loadedSurface);
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}
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// Return success
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stbi_image_free(data);
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texture_ = newTexture;
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return texture_ != nullptr;
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}
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// Crea una textura en blanco
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bool Texture::createBlank(int width, int height, SDL_PixelFormatEnum format, SDL_TextureAccess access)
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{
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// Crea una textura sin inicializar
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texture_ = SDL_CreateTexture(renderer_, format, access, width, height);
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if (!texture_)
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{
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std::cout << "Unable to create blank texture! SDL Error: " << SDL_GetError() << std::endl;
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}
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else
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{
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width_ = width;
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height_ = height;
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}
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return texture_ != nullptr;
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}
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// Libera la memoria de la textura
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void Texture::unloadTexture()
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{
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// Libera la textura
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if (texture_)
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{
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SDL_DestroyTexture(texture_);
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texture_ = nullptr;
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width_ = 0;
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height_ = 0;
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}
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}
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// Establece el color para la modulacion
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void Texture::setColor(Uint8 red, Uint8 green, Uint8 blue)
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{
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SDL_SetTextureColorMod(texture_, red, green, blue);
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}
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void Texture::setColor(Color color)
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{
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SDL_SetTextureColorMod(texture_, color.r, color.g, color.b);
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}
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// Establece el blending
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void Texture::setBlendMode(SDL_BlendMode blending)
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{
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SDL_SetTextureBlendMode(texture_, blending);
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}
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// Establece el alpha para la modulación
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void Texture::setAlpha(Uint8 alpha)
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{
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SDL_SetTextureAlphaMod(texture_, alpha);
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}
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// Renderiza la textura en un punto específico
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void Texture::render(int x, int y, SDL_Rect *clip, float zoomW, float zoomH, double angle, SDL_Point *center, SDL_RendererFlip flip)
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{
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// Establece el destino de renderizado en la pantalla
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SDL_Rect renderQuad = {x, y, width_, height_};
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// Obtiene las dimesiones del clip de renderizado
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if (clip != nullptr)
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{
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renderQuad.w = clip->w;
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renderQuad.h = clip->h;
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}
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// Calcula el zoom y las coordenadas
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if (zoomH != 1.0f || zoomW != 1.0f)
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{
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renderQuad.x = renderQuad.x + (renderQuad.w / 2);
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renderQuad.y = renderQuad.y + (renderQuad.h / 2);
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renderQuad.w = renderQuad.w * zoomW;
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renderQuad.h = renderQuad.h * zoomH;
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renderQuad.x = renderQuad.x - (renderQuad.w / 2);
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renderQuad.y = renderQuad.y - (renderQuad.h / 2);
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}
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// Renderiza a pantalla
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SDL_RenderCopyEx(renderer_, texture_, clip, &renderQuad, angle, center, flip);
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}
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// Establece la textura como objetivo de renderizado
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void Texture::setAsRenderTarget(SDL_Renderer *renderer)
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{
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SDL_SetRenderTarget(renderer, texture_);
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}
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// Obtiene el ancho de la imagen
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int Texture::getWidth()
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{
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return width_;
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}
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// Obtiene el alto de la imagen
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int Texture::getHeight()
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{
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return height_;
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}
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// Recarga la textura
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bool Texture::reLoad()
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{
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return loadFromFile(path_);
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}
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// Obtiene la textura
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SDL_Texture *Texture::getSDLTexture()
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{
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return texture_;
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}
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// Desencadenar la superficie actual
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void Texture::unloadSurface()
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{
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surface_.reset(); // Resetea el shared_ptr
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width_ = 0;
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height_ = 0;
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}
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// Crea una surface desde un fichero .gif
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std::shared_ptr<Surface> Texture::loadSurface(const std::string &file_path)
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{
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// Desencadenar la superficie actual
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unloadSurface();
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// Abrir el archivo usando std::ifstream para manejo automático del recurso
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std::ifstream file(file_path, std::ios::binary | std::ios::ate);
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if (!file)
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{
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std::cerr << "Error: Fichero no encontrado " << file_path << std::endl;
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throw std::runtime_error("Fichero no encontrado: " + file_path);
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}
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// Obtener el tamaño del archivo
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std::streamsize size = file.tellg();
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file.seekg(0, std::ios::beg);
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// Leer el contenido del archivo en un buffer
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std::vector<Uint8> buffer(size);
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if (!file.read(reinterpret_cast<char *>(buffer.data()), size))
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{
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std::cerr << "Error al leer el fichero " << file_path << std::endl;
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throw std::runtime_error("Error al leer el fichero: " + file_path);
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}
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// Cerrar el archivo (automáticamente manejado por std::ifstream)
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file.close();
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// Llamar a la función LoadGif
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Uint16 w, h;
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Uint8 *rawPixels = LoadGif(buffer.data(), &w, &h);
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if (!rawPixels)
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{
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return nullptr;
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}
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// Crear un std::shared_ptr con std::make_shared para pixels
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auto pixels = std::shared_ptr<Uint8[]>(rawPixels, std::default_delete<Uint8[]>());
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auto surface = std::make_shared<Surface>(w, h, pixels);
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// Actualizar la anchura y altura
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width_ = w;
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height_ = h;
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return surface;
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}
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// Vuelca la surface en la textura
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void Texture::flipSurface()
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{
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// Limpia la textura
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auto temp = SDL_GetRenderTarget(renderer_);
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SDL_SetRenderTarget(renderer_, texture_);
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SDL_SetRenderDrawColor(renderer_, 0, 0, 0, 0);
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SDL_RenderClear(renderer_);
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SDL_SetRenderTarget(renderer_, temp);
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// Vuelca los datos
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Uint32 *pixels;
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int pitch;
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SDL_LockTexture(texture_, nullptr, reinterpret_cast<void **>(&pixels), &pitch);
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for (int i = 0; i < width_ * height_; ++i)
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{
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pixels[i] = palettes_[current_palette_][surface_->data[i]];
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}
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SDL_UnlockTexture(texture_);
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}
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// Establece un color de la paleta
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void Texture::setPaletteColor(int palette, int index, Uint32 color)
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{
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palettes_.at(palette)[index] = color;
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}
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// Carga una paleta desde un fichero
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std::vector<Uint32> Texture::loadPaletteFromFile(const std::string &file_path)
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{
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std::vector<Uint32> palette;
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std::ifstream file(file_path, std::ios::binary | std::ios::ate);
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if (!file)
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{
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std::cerr << "Error: Fichero no encontrado " << getFileName(file_path) << std::endl;
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throw std::runtime_error("Fichero no encontrado: " + getFileName(file_path));
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}
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else
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{
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printWithDots("Image : ", getFileName(file_path), "[ LOADED ]");
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}
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auto size = file.tellg();
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file.seekg(0, std::ios::beg);
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std::vector<Uint8> buffer(size);
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if (!file.read(reinterpret_cast<char *>(buffer.data()), size))
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{
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std::cerr << "Error: No se pudo leer completamente el fichero " << getFileName(file_path) << std::endl;
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throw std::runtime_error("Error al leer el fichero: " + getFileName(file_path));
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}
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const auto pal = LoadPalette(buffer.data());
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if (!pal)
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{
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return palette;
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}
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for (int i = 0; i < 256; ++i)
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{
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palette.push_back((pal[i] << 8) + 255);
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}
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return palette;
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}
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// Añade una paleta a la lista
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void Texture::addPaletteFromFile(const std::string &path)
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{
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palettes_.emplace_back(loadPaletteFromFile(path));
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setPaletteColor((int)palettes_.size() - 1, 0, 0x00000000);
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}
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// Cambia la paleta de la textura
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void Texture::setPalette(int palette)
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{
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if (palette < (int)palettes_.size())
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{
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current_palette_ = palette;
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flipSurface();
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}
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}
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// Obtiene el renderizador
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SDL_Renderer *Texture::getRenderer()
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{
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return renderer_;
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} |