jaildesigner-demos/demo5_sprites_bouncing
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eliminada la dependencia de sdl2_image

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Sergio
2024-08-21 17:41:37 +02:00
parent 33e1c82396
commit dca521d148
5 changed files with 7957 additions and 36 deletions
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11
source/main.cpp
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@@ -1,5 +1,4 @@
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include "texture.h"
#include "ball.h"
#include "defines.h"
@@ -98,14 +97,7 @@ bool init()
// Initialize renderer color
SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
// Initialize PNG loading
int imgFlags = IMG_INIT_PNG;
if (!(IMG_Init(imgFlags) & imgFlags))
{
printf("SDL_image could not initialize! SDL_image Error: %s\n", IMG_GetError());
success = false;
}
// Establece el tamaño del renderizador
SDL_RenderSetLogicalSize(renderer, SCREEN_WIDTH, SCREEN_HEIGHT);
}
}
@@ -144,7 +136,6 @@ void close()
deleteBalls();
// Quit SDL subsystems
IMG_Quit();
SDL_Quit();
}

7897
source/stb_image.h Normal file
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File diff suppressed because it is too large Load Diff

78
source/texture.cpp
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@@ -1,12 +1,13 @@
#include <SDL2/SDL_image.h>
#include <stdio.h>
#include <string>
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#include "texture.h"
Texture::Texture(SDL_Renderer *renderer)
{
this->renderer = renderer;
texture = NULL;
texture = nullptr;
width = 0;
height = 0;
}
@@ -14,7 +15,7 @@ Texture::Texture(SDL_Renderer *renderer)
Texture::Texture(SDL_Renderer *renderer, std::string filepath)
{
this->renderer = renderer;
texture = NULL;
texture = nullptr;
width = 0;
height = 0;
loadFromFile(filepath);
@@ -27,52 +28,79 @@ Texture::~Texture()
bool Texture::loadFromFile(std::string path)
{
// Get rid of preexisting texture
free();
// The final texture
SDL_Texture *newTexture = NULL;
// Load image at specified path
SDL_Surface *loadedSurface = IMG_Load(path.c_str());
if (loadedSurface == NULL)
const std::string filename = path.substr(path.find_last_of("\\/") + 1);
int req_format = STBI_rgb_alpha;
int width, height, orig_format;
unsigned char *data = stbi_load(path.c_str(), &width, &height, &orig_format, req_format);
if (data == nullptr)
{
printf("Unable to load image %s! SDL_image Error: %s\n", path.c_str(), IMG_GetError());
SDL_Log("Loading image failed: %s", stbi_failure_reason());
exit(1);
}
else
{
// Color key image
SDL_SetColorKey(loadedSurface, SDL_TRUE, SDL_MapRGB(loadedSurface->format, 0, 0xFF, 0xFF));
std::cout << "Image loaded: " << filename.c_str() << std::endl;
}
// Create texture from surface pixels
int depth, pitch;
Uint32 pixel_format;
if (req_format == STBI_rgb)
{
depth = 24;
pitch = 3 * width; // 3 bytes por pixel * pixels por linea
pixel_format = SDL_PIXELFORMAT_RGB24;
}
else
{ // STBI_rgb_alpha (RGBA)
depth = 32;
pitch = 4 * width;
pixel_format = SDL_PIXELFORMAT_RGBA32;
}
// Limpia
free();
// La textura final
SDL_Texture *newTexture = nullptr;
// Carga la imagen desde una ruta específica
SDL_Surface *loadedSurface = SDL_CreateRGBSurfaceWithFormatFrom((void *)data, width, height, depth, pitch, pixel_format);
if (loadedSurface == nullptr)
{
std::cout << "Unable to load image " << path.c_str() << std::endl;
}
else
{
// Crea la textura desde los pixels de la surface
newTexture = SDL_CreateTextureFromSurface(renderer, loadedSurface);
if (newTexture == NULL)
if (newTexture == nullptr)
{
printf("Unable to create texture from %s! SDL Error: %s\n", path.c_str(), SDL_GetError());
std::cout << "Unable to create texture from " << path.c_str() << "! SDL Error: " << SDL_GetError() << std::endl;
}
else
{
// Get image dimensions
width = loadedSurface->w;
height = loadedSurface->h;
// Obtiene las dimensiones de la imagen
this->width = loadedSurface->w;
this->height = loadedSurface->h;
}
// Get rid of old loaded surface
// Elimina la textura cargada
SDL_FreeSurface(loadedSurface);
}
// Return success
stbi_image_free(data);
texture = newTexture;
return texture != NULL;
return texture != nullptr;
}
void Texture::free()
{
// Free texture if it exists
if (texture != NULL)
if (texture != nullptr)
{
SDL_DestroyTexture(texture);
texture = NULL;
texture = nullptr;
width = 0;
height = 0;
}