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afegida carpeta "external" al source i moguts ahi els .cpp que no son meus

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Sergio
2025-06-21 12:14:23 +02:00
parent ee43f1cf56
commit 97f76e122d
23 changed files with 104 additions and 34 deletions
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300
source/external/gif.cpp vendored Normal file
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#include "gif.h"
#include <SDL3/SDL_log.h> // Para SDL_LogError, SDL_LogCategory, SDL_LogInfo
#include <cstring> // Para memcpy, size_t
#include <stdexcept> // Para runtime_error
#include <string> // Para char_traits, operator==, basic_string, string
namespace GIF
{
inline void readBytes(const uint8_t *&buffer, void *dst, size_t size)
{
std::memcpy(dst, buffer, size);
buffer += size;
}
void Gif::decompress(int code_length, const uint8_t *input, int input_length, uint8_t *out)
{
if (code_length < 2 || code_length > 12)
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid LZW code length: %d", code_length);
throw std::runtime_error("Invalid LZW code length");
}
int i, bit;
int prev = -1;
std::vector<DictionaryEntry> dictionary;
int dictionary_ind;
unsigned int mask = 0x01;
int reset_code_length = code_length;
int clear_code = 1 << code_length;
int stop_code = clear_code + 1;
int match_len = 0;
dictionary.resize(1 << (code_length + 1));
for (dictionary_ind = 0; dictionary_ind < (1 << code_length); dictionary_ind++)
{
dictionary[dictionary_ind].byte = static_cast<uint8_t>(dictionary_ind);
dictionary[dictionary_ind].prev = -1;
dictionary[dictionary_ind].len = 1;
}
dictionary_ind += 2;
while (input_length > 0)
{
int code = 0;
for (i = 0; i < (code_length + 1); i++)
{
if (input_length <= 0)
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unexpected end of input in decompress");
throw std::runtime_error("Unexpected end of input in decompress");
}
bit = ((*input & mask) != 0) ? 1 : 0;
mask <<= 1;
if (mask == 0x100)
{
mask = 0x01;
input++;
input_length--;
}
code |= (bit << i);
}
if (code == clear_code)
{
code_length = reset_code_length;
dictionary.resize(1 << (code_length + 1));
for (dictionary_ind = 0; dictionary_ind < (1 << code_length); dictionary_ind++)
{
dictionary[dictionary_ind].byte = static_cast<uint8_t>(dictionary_ind);
dictionary[dictionary_ind].prev = -1;
dictionary[dictionary_ind].len = 1;
}
dictionary_ind += 2;
prev = -1;
continue;
}
else if (code == stop_code)
{
break;
}
if (prev > -1 && code_length < 12)
{
if (code > dictionary_ind)
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "LZW error: code (%d) exceeds dictionary_ind (%d)", code, dictionary_ind);
throw std::runtime_error("LZW error: code exceeds dictionary_ind.");
}
int ptr;
if (code == dictionary_ind)
{
ptr = prev;
while (dictionary[ptr].prev != -1)
ptr = dictionary[ptr].prev;
dictionary[dictionary_ind].byte = dictionary[ptr].byte;
}
else
{
ptr = code;
while (dictionary[ptr].prev != -1)
ptr = dictionary[ptr].prev;
dictionary[dictionary_ind].byte = dictionary[ptr].byte;
}
dictionary[dictionary_ind].prev = prev;
dictionary[dictionary_ind].len = dictionary[prev].len + 1;
dictionary_ind++;
if ((dictionary_ind == (1 << (code_length + 1))) && (code_length < 11))
{
code_length++;
dictionary.resize(1 << (code_length + 1));
}
}
prev = code;
if (code < 0 || static_cast<size_t>(code) >= dictionary.size())
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid LZW code %d, dictionary size %lu", code, static_cast<unsigned long>(dictionary.size()));
throw std::runtime_error("LZW error: invalid code encountered");
}
int curCode = code;
match_len = dictionary[curCode].len;
while (curCode != -1)
{
out[dictionary[curCode].len - 1] = dictionary[curCode].byte;
if (dictionary[curCode].prev == curCode)
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Internal error; self-reference detected.");
throw std::runtime_error("Internal error in decompress: self-reference");
}
curCode = dictionary[curCode].prev;
}
out += match_len;
}
}
std::vector<uint8_t> Gif::readSubBlocks(const uint8_t *&buffer)
{
std::vector<uint8_t> data;
uint8_t block_size = *buffer;
buffer++;
while (block_size != 0)
{
data.insert(data.end(), buffer, buffer + block_size);
buffer += block_size;
block_size = *buffer;
buffer++;
}
return data;
}
std::vector<uint8_t> Gif::processImageDescriptor(const uint8_t *&buffer, const std::vector<RGB> &gct, int resolution_bits)
{
ImageDescriptor image_descriptor;
readBytes(buffer, &image_descriptor, sizeof(ImageDescriptor));
uint8_t lzw_code_size;
readBytes(buffer, &lzw_code_size, sizeof(uint8_t));
std::vector<uint8_t> compressed_data = readSubBlocks(buffer);
int uncompressed_data_length = image_descriptor.image_width * image_descriptor.image_height;
std::vector<uint8_t> uncompressed_data(uncompressed_data_length);
decompress(lzw_code_size, compressed_data.data(), static_cast<int>(compressed_data.size()), uncompressed_data.data());
return uncompressed_data;
}
std::vector<uint32_t> Gif::loadPalette(const uint8_t *buffer)
{
uint8_t header[6];
std::memcpy(header, buffer, 6);
buffer += 6;
ScreenDescriptor screen_descriptor;
std::memcpy(&screen_descriptor, buffer, sizeof(ScreenDescriptor));
buffer += sizeof(ScreenDescriptor);
std::vector<uint32_t> global_color_table;
if (screen_descriptor.fields & 0x80)
{
int global_color_table_size = 1 << (((screen_descriptor.fields & 0x07) + 1));
global_color_table.resize(global_color_table_size);
for (int i = 0; i < global_color_table_size; ++i)
{
uint8_t r = buffer[0];
uint8_t g = buffer[1];
uint8_t b = buffer[2];
global_color_table[i] = (r << 16) | (g << 8) | b;
buffer += 3;
}
}
return global_color_table;
}
std::vector<uint8_t> Gif::processGifStream(const uint8_t *buffer, uint16_t &w, uint16_t &h)
{
uint8_t header[6];
std::memcpy(header, buffer, 6);
buffer += 6;
std::string headerStr(reinterpret_cast<char *>(header), 6);
if (headerStr != "GIF87a" && headerStr != "GIF89a")
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Formato de archivo GIF inválido: %s", headerStr.c_str());
throw std::runtime_error("Formato de archivo GIF inválido.");
}
SDL_LogInfo(SDL_LOG_CATEGORY_TEST, "Procesando GIF con cabecera: %s", headerStr.c_str());
ScreenDescriptor screen_descriptor;
readBytes(buffer, &screen_descriptor, sizeof(ScreenDescriptor));
w = screen_descriptor.width;
h = screen_descriptor.height;
SDL_LogInfo(SDL_LOG_CATEGORY_TEST, "Resolución del GIF: %dx%d", w, h);
int color_resolution_bits = ((screen_descriptor.fields & 0x70) >> 4) + 1;
std::vector<RGB> global_color_table;
if (screen_descriptor.fields & 0x80)
{
int global_color_table_size = 1 << (((screen_descriptor.fields & 0x07) + 1));
global_color_table.resize(global_color_table_size);
std::memcpy(global_color_table.data(), buffer, 3 * global_color_table_size);
buffer += 3 * global_color_table_size;
}
uint8_t block_type = *buffer++;
while (block_type != TRAILER)
{
if (block_type == EXTENSION_INTRODUCER)
{
uint8_t extension_label = *buffer++;
switch (extension_label)
{
case GRAPHIC_CONTROL:
{
uint8_t blockSize = *buffer++;
buffer += blockSize;
uint8_t subBlockSize = *buffer++;
while (subBlockSize != 0)
{
buffer += subBlockSize;
subBlockSize = *buffer++;
}
break;
}
case APPLICATION_EXTENSION:
case COMMENT_EXTENSION:
case PLAINTEXT_EXTENSION:
{
uint8_t blockSize = *buffer++;
buffer += blockSize;
uint8_t subBlockSize = *buffer++;
while (subBlockSize != 0)
{
buffer += subBlockSize;
subBlockSize = *buffer++;
}
break;
}
default:
{
uint8_t blockSize = *buffer++;
buffer += blockSize;
uint8_t subBlockSize = *buffer++;
while (subBlockSize != 0)
{
buffer += subBlockSize;
subBlockSize = *buffer++;
}
break;
}
}
}
else if (block_type == IMAGE_DESCRIPTOR)
{
return processImageDescriptor(buffer, global_color_table, color_resolution_bits);
}
else
{
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Unrecognized block type: 0x%X", block_type);
return std::vector<uint8_t>{};
}
block_type = *buffer++;
}
SDL_LogInfo(SDL_LOG_CATEGORY_TEST, "GIF procesado correctamente.");
return std::vector<uint8_t>{};
}
std::vector<uint8_t> Gif::loadGif(const uint8_t *buffer, uint16_t &w, uint16_t &h)
{
return processGifStream(buffer, w, h);
}
} // namespace GIF

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#pragma once
#include <cstdint> // Para uint8_t, uint16_t, uint32_t
#include <vector> // Para vector
namespace GIF
{
// Constantes definidas con constexpr, en lugar de macros
constexpr uint8_t EXTENSION_INTRODUCER = 0x21;
constexpr uint8_t IMAGE_DESCRIPTOR = 0x2C;
constexpr uint8_t TRAILER = 0x3B;
constexpr uint8_t GRAPHIC_CONTROL = 0xF9;
constexpr uint8_t APPLICATION_EXTENSION = 0xFF;
constexpr uint8_t COMMENT_EXTENSION = 0xFE;
constexpr uint8_t PLAINTEXT_EXTENSION = 0x01;
#pragma pack(push, 1)
struct ScreenDescriptor
{
uint16_t width;
uint16_t height;
uint8_t fields;
uint8_t background_color_index;
uint8_t pixel_aspect_ratio;
};
struct RGB
{
uint8_t r, g, b;
};
struct ImageDescriptor
{
uint16_t image_left_position;
uint16_t image_top_position;
uint16_t image_width;
uint16_t image_height;
uint8_t fields;
};
#pragma pack(pop)
struct DictionaryEntry
{
uint8_t byte;
int prev;
int len;
};
struct Extension
{
uint8_t extension_code;
uint8_t block_size;
};
struct GraphicControlExtension
{
uint8_t fields;
uint16_t delay_time;
uint8_t transparent_color_index;
};
struct ApplicationExtension
{
uint8_t application_id[8];
uint8_t version[3];
};
struct PlaintextExtension
{
uint16_t left, top, width, height;
uint8_t cell_width, cell_height;
uint8_t foreground_color, background_color;
};
class Gif
{
public:
// Descompone (uncompress) el bloque comprimido usando LZW.
// Este método puede lanzar std::runtime_error en caso de error.
void decompress(int code_length, const uint8_t *input, int input_length, uint8_t *out);
// Carga la paleta (global color table) a partir de un buffer,
// retornándola en un vector de uint32_t (cada color se compone de R, G, B).
std::vector<uint32_t> loadPalette(const uint8_t *buffer);
// Carga el stream GIF; devuelve un vector con los datos de imagen sin comprimir y
// asigna el ancho y alto mediante referencias.
std::vector<uint8_t> loadGif(const uint8_t *buffer, uint16_t &w, uint16_t &h);
private:
// Lee los sub-bloques de datos y los acumula en un std::vector<uint8_t>.
std::vector<uint8_t> readSubBlocks(const uint8_t *&buffer);
// Procesa el Image Descriptor y retorna el vector de datos sin comprimir.
std::vector<uint8_t> processImageDescriptor(const uint8_t *&buffer, const std::vector<RGB> &gct, int resolution_bits);
// Procesa el stream completo del GIF y devuelve los datos sin comprimir.
std::vector<uint8_t> processGifStream(const uint8_t *buffer, uint16_t &w, uint16_t &h);
};
} // namespace GIF

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#ifndef JA_USESDLMIXER
#include "jail_audio.h"
#include <SDL3/SDL_iostream.h> // Para SDL_IOFromMem
#include <SDL3/SDL_log.h> // Para SDL_Log, SDL_SetLogPriority, SDL_LogC...
#include <SDL3/SDL_timer.h> // Para SDL_GetTicks, SDL_AddTimer, SDL_Remov...
#include <stdint.h> // Para uint32_t, uint8_t
#include <stdio.h> // Para NULL, fseek, printf, fclose, fopen
#include <stdlib.h> // Para free, malloc
#include "stb_vorbis.c" // Para stb_vorbis_decode_memory
#define JA_MAX_SIMULTANEOUS_CHANNELS 20
struct JA_Sound_t
{
SDL_AudioSpec spec{SDL_AUDIO_S16, 2, 48000};
Uint32 length{0};
Uint8 *buffer{NULL};
};
struct JA_Channel_t
{
JA_Sound_t *sound{nullptr};
int pos{0};
int times{0};
SDL_AudioStream *stream{nullptr};
JA_Channel_state state{JA_CHANNEL_FREE};
};
struct JA_Music_t
{
SDL_AudioSpec spec{SDL_AUDIO_S16, 2, 48000};
Uint32 length{0};
Uint8 *buffer{nullptr};
int pos{0};
int times{0};
SDL_AudioStream *stream{nullptr};
JA_Music_state state{JA_MUSIC_INVALID};
};
JA_Music_t *current_music{nullptr};
JA_Channel_t channels[JA_MAX_SIMULTANEOUS_CHANNELS];
SDL_AudioSpec JA_audioSpec{SDL_AUDIO_S16, 2, 48000};
float JA_musicVolume{1.0f};
float JA_soundVolume{0.5f};
bool JA_musicEnabled{true};
bool JA_soundEnabled{true};
SDL_AudioDeviceID sdlAudioDevice{0};
SDL_TimerID JA_timerID{0};
bool fading = false;
int fade_start_time;
int fade_duration;
int fade_initial_volume;
/*
void audioCallback(void * userdata, uint8_t * stream, int len) {
SDL_memset(stream, 0, len);
if (current_music != NULL && current_music->state == JA_MUSIC_PLAYING) {
const int size = SDL_min(len, current_music->samples*2-current_music->pos);
SDL_MixAudioFormat(stream, (Uint8*)(current_music->output+current_music->pos), AUDIO_S16, size, JA_musicVolume);
current_music->pos += size/2;
if (size < len) {
if (current_music->times != 0) {
SDL_MixAudioFormat(stream+size, (Uint8*)current_music->output, AUDIO_S16, len-size, JA_musicVolume);
current_music->pos = (len-size)/2;
if (current_music->times > 0) current_music->times--;
} else {
current_music->pos = 0;
current_music->state = JA_MUSIC_STOPPED;
}
}
}
// Mixar els channels mi amol
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++) {
if (channels[i].state == JA_CHANNEL_PLAYING) {
const int size = SDL_min(len, channels[i].sound->length - channels[i].pos);
SDL_MixAudioFormat(stream, channels[i].sound->buffer + channels[i].pos, AUDIO_S16, size, JA_soundVolume);
channels[i].pos += size;
if (size < len) {
if (channels[i].times != 0) {
SDL_MixAudioFormat(stream + size, channels[i].sound->buffer, AUDIO_S16, len-size, JA_soundVolume);
channels[i].pos = len-size;
if (channels[i].times > 0) channels[i].times--;
} else {
JA_StopChannel(i);
}
}
}
}
}
*/
Uint32 JA_UpdateCallback(void *userdata, SDL_TimerID timerID, Uint32 interval)
{
if (JA_musicEnabled && current_music && current_music->state == JA_MUSIC_PLAYING)
{
if (fading)
{
int time = SDL_GetTicks();
if (time > (fade_start_time + fade_duration))
{
fading = false;
JA_StopMusic();
return 30;
}
else
{
const int time_passed = time - fade_start_time;
const float percent = (float)time_passed / (float)fade_duration;
SDL_SetAudioStreamGain(current_music->stream, 1.0 - percent);
}
}
if (current_music->times != 0)
{
if (SDL_GetAudioStreamAvailable(current_music->stream) < static_cast<int>(current_music->length / 2))
{
SDL_PutAudioStreamData(current_music->stream, current_music->buffer, current_music->length);
}
if (current_music->times > 0)
current_music->times--;
}
else
{
if (SDL_GetAudioStreamAvailable(current_music->stream) == 0)
JA_StopMusic();
}
}
if (JA_soundEnabled)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; ++i)
if (channels[i].state == JA_CHANNEL_PLAYING)
{
if (channels[i].times != 0)
{
if (SDL_GetAudioStreamAvailable(channels[i].stream) < static_cast<int>(channels[i].sound->length / 2))
SDL_PutAudioStreamData(channels[i].stream, channels[i].sound->buffer, channels[i].sound->length);
if (channels[i].times > 0)
channels[i].times--;
}
}
else
{
if (channels[i].stream && SDL_GetAudioStreamAvailable(channels[i].stream) == 0)
{
JA_StopChannel(i);
}
}
}
return 30;
}
void JA_Init(const int freq, const SDL_AudioFormat format, const int channels)
{
#ifdef DEBUG
SDL_SetLogPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_DEBUG);
#endif
SDL_LogInfo(SDL_LOG_CATEGORY_TEST, "Iniciant JailAudio...");
JA_audioSpec = {format, channels, freq};
if (!sdlAudioDevice)
SDL_CloseAudioDevice(sdlAudioDevice);
sdlAudioDevice = SDL_OpenAudioDevice(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &JA_audioSpec);
if (sdlAudioDevice == 0)
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to initialize SDL audio!\n");
else
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "SDL audio initialized successfully.\n");
// SDL_PauseAudioDevice(sdlAudioDevice);
JA_timerID = SDL_AddTimer(30, JA_UpdateCallback, nullptr);
}
void JA_Quit()
{
if (JA_timerID)
SDL_RemoveTimer(JA_timerID);
if (!sdlAudioDevice)
SDL_CloseAudioDevice(sdlAudioDevice);
sdlAudioDevice = 0;
}
JA_Music_t *JA_LoadMusic(Uint8 *buffer, Uint32 length)
{
JA_Music_t *music = new JA_Music_t();
int chan, samplerate;
short *output;
music->length = stb_vorbis_decode_memory(buffer, length, &chan, &samplerate, &output) * chan * 2;
music->spec.channels = chan;
music->spec.freq = samplerate;
music->spec.format = SDL_AUDIO_S16;
music->buffer = (Uint8 *)SDL_malloc(music->length);
SDL_memcpy(music->buffer, output, music->length);
free(output);
music->pos = 0;
music->state = JA_MUSIC_STOPPED;
return music;
}
JA_Music_t *JA_LoadMusic(const char *filename)
{
// [RZC 28/08/22] Carreguem primer el arxiu en memòria i després el descomprimim. Es algo més rapid.
FILE *f = fopen(filename, "rb");
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
Uint8 *buffer = (Uint8 *)malloc(fsize + 1);
if (fread(buffer, fsize, 1, f) != 1)
return NULL;
fclose(f);
JA_Music_t *music = JA_LoadMusic(buffer, fsize);
free(buffer);
return music;
}
void JA_PlayMusic(JA_Music_t *music, const int loop)
{
if (!JA_musicEnabled)
return;
JA_StopMusic();
current_music = music;
current_music->pos = 0;
current_music->state = JA_MUSIC_PLAYING;
current_music->times = loop;
current_music->stream = SDL_CreateAudioStream(&current_music->spec, &JA_audioSpec);
if (!SDL_PutAudioStreamData(current_music->stream, current_music->buffer, current_music->length))
printf("[ERROR] SDL_PutAudioStreamData failed!\n");
SDL_SetAudioStreamGain(current_music->stream, JA_musicVolume);
if (!SDL_BindAudioStream(sdlAudioDevice, current_music->stream))
printf("[ERROR] SDL_BindAudioStream failed!\n");
}
void JA_PauseMusic()
{
if (!JA_musicEnabled)
return;
if (!current_music || current_music->state == JA_MUSIC_INVALID)
return;
current_music->state = JA_MUSIC_PAUSED;
// SDL_PauseAudioStreamDevice(current_music->stream);
SDL_UnbindAudioStream(current_music->stream);
}
void JA_ResumeMusic()
{
if (!JA_musicEnabled)
return;
if (!current_music || current_music->state == JA_MUSIC_INVALID)
return;
current_music->state = JA_MUSIC_PLAYING;
// SDL_ResumeAudioStreamDevice(current_music->stream);
SDL_BindAudioStream(sdlAudioDevice, current_music->stream);
}
void JA_StopMusic()
{
if (!JA_musicEnabled)
return;
if (!current_music || current_music->state == JA_MUSIC_INVALID)
return;
current_music->pos = 0;
current_music->state = JA_MUSIC_STOPPED;
// SDL_PauseAudioStreamDevice(current_music->stream);
SDL_DestroyAudioStream(current_music->stream);
current_music->stream = nullptr;
}
void JA_FadeOutMusic(const int milliseconds)
{
if (!JA_musicEnabled)
return;
if (current_music == NULL || current_music->state == JA_MUSIC_INVALID)
return;
fading = true;
fade_start_time = SDL_GetTicks();
fade_duration = milliseconds;
fade_initial_volume = JA_musicVolume;
}
JA_Music_state JA_GetMusicState()
{
if (!JA_musicEnabled)
return JA_MUSIC_DISABLED;
if (!current_music)
return JA_MUSIC_INVALID;
return current_music->state;
}
void JA_DeleteMusic(JA_Music_t *music)
{
if (current_music == music)
current_music = nullptr;
SDL_free(music->buffer);
if (music->stream)
SDL_DestroyAudioStream(music->stream);
delete music;
}
float JA_SetMusicVolume(float volume)
{
JA_musicVolume = SDL_clamp(volume, 0.0f, 1.0f);
if (current_music)
SDL_SetAudioStreamGain(current_music->stream, JA_musicVolume);
return JA_musicVolume;
}
void JA_SetMusicPosition(float value)
{
if (!current_music)
return;
current_music->pos = value * current_music->spec.freq;
}
float JA_GetMusicPosition()
{
if (!current_music)
return 0;
return float(current_music->pos) / float(current_music->spec.freq);
}
void JA_EnableMusic(const bool value)
{
if (!value && current_music && (current_music->state == JA_MUSIC_PLAYING))
JA_StopMusic();
JA_musicEnabled = value;
}
JA_Sound_t *JA_NewSound(Uint8 *buffer, Uint32 length)
{
JA_Sound_t *sound = new JA_Sound_t();
sound->buffer = buffer;
sound->length = length;
return sound;
}
JA_Sound_t *JA_LoadSound(uint8_t *buffer, uint32_t size)
{
JA_Sound_t *sound = new JA_Sound_t();
SDL_LoadWAV_IO(SDL_IOFromMem(buffer, size), 1, &sound->spec, &sound->buffer, &sound->length);
return sound;
}
JA_Sound_t *JA_LoadSound(const char *filename)
{
JA_Sound_t *sound = new JA_Sound_t();
SDL_LoadWAV(filename, &sound->spec, &sound->buffer, &sound->length);
return sound;
}
int JA_PlaySound(JA_Sound_t *sound, const int loop)
{
if (!JA_soundEnabled)
return -1;
int channel = 0;
while (channel < JA_MAX_SIMULTANEOUS_CHANNELS && channels[channel].state != JA_CHANNEL_FREE)
{
channel++;
}
if (channel == JA_MAX_SIMULTANEOUS_CHANNELS)
channel = 0;
JA_StopChannel(channel);
channels[channel].sound = sound;
channels[channel].times = loop;
channels[channel].pos = 0;
channels[channel].state = JA_CHANNEL_PLAYING;
channels[channel].stream = SDL_CreateAudioStream(&channels[channel].sound->spec, &JA_audioSpec);
SDL_PutAudioStreamData(channels[channel].stream, channels[channel].sound->buffer, channels[channel].sound->length);
SDL_SetAudioStreamGain(channels[channel].stream, JA_soundVolume);
SDL_BindAudioStream(sdlAudioDevice, channels[channel].stream);
return channel;
}
int JA_PlaySoundOnChannel(JA_Sound_t *sound, const int channel, const int loop)
{
if (!JA_soundEnabled)
return -1;
if (channel < 0 || channel >= JA_MAX_SIMULTANEOUS_CHANNELS)
return -1;
JA_StopChannel(channel);
channels[channel].sound = sound;
channels[channel].times = loop;
channels[channel].pos = 0;
channels[channel].state = JA_CHANNEL_PLAYING;
channels[channel].stream = SDL_CreateAudioStream(&channels[channel].sound->spec, &JA_audioSpec);
SDL_PutAudioStreamData(channels[channel].stream, channels[channel].sound->buffer, channels[channel].sound->length);
SDL_SetAudioStreamGain(channels[channel].stream, JA_soundVolume);
SDL_BindAudioStream(sdlAudioDevice, channels[channel].stream);
return channel;
}
void JA_DeleteSound(JA_Sound_t *sound)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
{
if (channels[i].sound == sound)
JA_StopChannel(i);
}
SDL_free(sound->buffer);
delete sound;
}
void JA_PauseChannel(const int channel)
{
if (!JA_soundEnabled)
return;
if (channel == -1)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
if (channels[i].state == JA_CHANNEL_PLAYING)
{
channels[i].state = JA_CHANNEL_PAUSED;
// SDL_PauseAudioStreamDevice(channels[i].stream);
SDL_UnbindAudioStream(channels[i].stream);
}
}
else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
{
if (channels[channel].state == JA_CHANNEL_PLAYING)
{
channels[channel].state = JA_CHANNEL_PAUSED;
// SDL_PauseAudioStreamDevice(channels[channel].stream);
SDL_UnbindAudioStream(channels[channel].stream);
}
}
}
void JA_ResumeChannel(const int channel)
{
if (!JA_soundEnabled)
return;
if (channel == -1)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
if (channels[i].state == JA_CHANNEL_PAUSED)
{
channels[i].state = JA_CHANNEL_PLAYING;
// SDL_ResumeAudioStreamDevice(channels[i].stream);
SDL_BindAudioStream(sdlAudioDevice, channels[i].stream);
}
}
else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
{
if (channels[channel].state == JA_CHANNEL_PAUSED)
{
channels[channel].state = JA_CHANNEL_PLAYING;
// SDL_ResumeAudioStreamDevice(channels[channel].stream);
SDL_BindAudioStream(sdlAudioDevice, channels[channel].stream);
}
}
}
void JA_StopChannel(const int channel)
{
if (!JA_soundEnabled)
return;
if (channel == -1)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
{
if (channels[i].state != JA_CHANNEL_FREE)
SDL_DestroyAudioStream(channels[i].stream);
channels[i].stream = nullptr;
channels[i].state = JA_CHANNEL_FREE;
channels[i].pos = 0;
channels[i].sound = NULL;
}
}
else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
{
if (channels[channel].state != JA_CHANNEL_FREE)
SDL_DestroyAudioStream(channels[channel].stream);
channels[channel].stream = nullptr;
channels[channel].state = JA_CHANNEL_FREE;
channels[channel].pos = 0;
channels[channel].sound = NULL;
}
}
JA_Channel_state JA_GetChannelState(const int channel)
{
if (!JA_soundEnabled)
return JA_SOUND_DISABLED;
if (channel < 0 || channel >= JA_MAX_SIMULTANEOUS_CHANNELS)
return JA_CHANNEL_INVALID;
return channels[channel].state;
}
float JA_SetSoundVolume(float volume)
{
JA_soundVolume = SDL_clamp(volume, 0.0f, 1.0f);
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
if ((channels[i].state == JA_CHANNEL_PLAYING) || (channels[i].state == JA_CHANNEL_PAUSED))
SDL_SetAudioStreamGain(channels[i].stream, JA_soundVolume);
return JA_soundVolume;
}
void JA_EnableSound(const bool value)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
{
if (channels[i].state == JA_CHANNEL_PLAYING)
JA_StopChannel(i);
}
JA_soundEnabled = value;
}
float JA_SetVolume(float volume)
{
JA_SetSoundVolume(JA_SetMusicVolume(volume) / 2.0f);
return JA_musicVolume;
}
#endif

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#pragma once
#include <SDL3/SDL_audio.h> // Para SDL_AudioFormat
#include <SDL3/SDL_stdinc.h> // Para Uint32, Uint8
struct JA_Music_t; // lines 8-8
struct JA_Sound_t; // lines 7-7
enum JA_Channel_state
{
JA_CHANNEL_INVALID,
JA_CHANNEL_FREE,
JA_CHANNEL_PLAYING,
JA_CHANNEL_PAUSED,
JA_SOUND_DISABLED
};
enum JA_Music_state
{
JA_MUSIC_INVALID,
JA_MUSIC_PLAYING,
JA_MUSIC_PAUSED,
JA_MUSIC_STOPPED,
JA_MUSIC_DISABLED
};
struct JA_Sound_t;
struct JA_Music_t;
void JA_Init(const int freq, const SDL_AudioFormat format, const int channels);
void JA_Quit();
JA_Music_t *JA_LoadMusic(const char *filename);
JA_Music_t *JA_LoadMusic(Uint8 *buffer, Uint32 length);
void JA_PlayMusic(JA_Music_t *music, const int loop = -1);
void JA_PauseMusic();
void JA_ResumeMusic();
void JA_StopMusic();
void JA_FadeOutMusic(const int milliseconds);
JA_Music_state JA_GetMusicState();
void JA_DeleteMusic(JA_Music_t *music);
float JA_SetMusicVolume(float volume);
void JA_SetMusicPosition(float value);
float JA_GetMusicPosition();
void JA_EnableMusic(const bool value);
JA_Sound_t *JA_NewSound(Uint8 *buffer, Uint32 length);
JA_Sound_t *JA_LoadSound(Uint8 *buffer, Uint32 length);
JA_Sound_t *JA_LoadSound(const char *filename);
int JA_PlaySound(JA_Sound_t *sound, const int loop = 0);
int JA_PlaySoundOnChannel(JA_Sound_t *sound, const int channel, const int loop = 0);
void JA_PauseChannel(const int channel);
void JA_ResumeChannel(const int channel);
void JA_StopChannel(const int channel);
JA_Channel_state JA_GetChannelState(const int channel);
void JA_DeleteSound(JA_Sound_t *sound);
float JA_SetSoundVolume(float volume);
void JA_EnableSound(const bool value);
float JA_SetVolume(float volume);

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#include "jail_shader.h"
#include <SDL3/SDL_log.h> // Para SDL_LogCategory, SDL_LogError, SDL_LogWarn
#include <SDL3/SDL_rect.h> // Para SDL_FPoint, SDL_Point
#include <cstring> // Para strncmp
#include <stdexcept> // Para runtime_error
#include <vector> // Para vector
#ifdef __APPLE__
#include "CoreFoundation/CoreFoundation.h" // Para Core Foundation en macOS
#include <OpenGL/OpenGL.h> // Para OpenGL en macOS
#if ESSENTIAL_GL_PRACTICES_SUPPORT_GL3
#include <OpenGL/gl3.h> // Para OpenGL 3 en macOS
#else // NO ESSENTIAL_GL_PRACTICES_SUPPORT_GL3
#include <OpenGL/gl.h> // Para OpenGL (compatibilidad) en macOS
#endif // ESSENTIAL_GL_PRACTICES_SUPPORT_GL3
#else // SI NO ES __APPLE__
#include <SDL3/SDL_opengl.h> // Para GLuint, glTexCoord2f, glVertex2f, GLfloat
#endif // __APPLE__
namespace shader
{
SDL_Window *win = nullptr;
SDL_Renderer *renderer = nullptr;
GLuint programId = 0;
SDL_Texture *backBuffer = nullptr;
SDL_Point win_size = {320 * 4, 256 * 4};
SDL_FPoint tex_size = {320, 256};
bool usingOpenGL = false;
#ifndef __APPLE__
// Declaración de funciones de extensión de OpenGL (evitando GLEW)
PFNGLCREATESHADERPROC glCreateShader;
PFNGLSHADERSOURCEPROC glShaderSource;
PFNGLCOMPILESHADERPROC glCompileShader;
PFNGLGETSHADERIVPROC glGetShaderiv;
PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
PFNGLDELETESHADERPROC glDeleteShader;
PFNGLATTACHSHADERPROC glAttachShader;
PFNGLCREATEPROGRAMPROC glCreateProgram;
PFNGLLINKPROGRAMPROC glLinkProgram;
PFNGLVALIDATEPROGRAMPROC glValidateProgram;
PFNGLGETPROGRAMIVPROC glGetProgramiv;
PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
PFNGLUSEPROGRAMPROC glUseProgram;
bool initGLExtensions()
{
glCreateShader = (PFNGLCREATESHADERPROC)SDL_GL_GetProcAddress("glCreateShader");
glShaderSource = (PFNGLSHADERSOURCEPROC)SDL_GL_GetProcAddress("glShaderSource");
glCompileShader = (PFNGLCOMPILESHADERPROC)SDL_GL_GetProcAddress("glCompileShader");
glGetShaderiv = (PFNGLGETSHADERIVPROC)SDL_GL_GetProcAddress("glGetShaderiv");
glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)SDL_GL_GetProcAddress("glGetShaderInfoLog");
glDeleteShader = (PFNGLDELETESHADERPROC)SDL_GL_GetProcAddress("glDeleteShader");
glAttachShader = (PFNGLATTACHSHADERPROC)SDL_GL_GetProcAddress("glAttachShader");
glCreateProgram = (PFNGLCREATEPROGRAMPROC)SDL_GL_GetProcAddress("glCreateProgram");
glLinkProgram = (PFNGLLINKPROGRAMPROC)SDL_GL_GetProcAddress("glLinkProgram");
glValidateProgram = (PFNGLVALIDATEPROGRAMPROC)SDL_GL_GetProcAddress("glValidateProgram");
glGetProgramiv = (PFNGLGETPROGRAMIVPROC)SDL_GL_GetProcAddress("glGetProgramiv");
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)SDL_GL_GetProcAddress("glGetProgramInfoLog");
glUseProgram = (PFNGLUSEPROGRAMPROC)SDL_GL_GetProcAddress("glUseProgram");
return glCreateShader && glShaderSource && glCompileShader && glGetShaderiv &&
glGetShaderInfoLog && glDeleteShader && glAttachShader && glCreateProgram &&
glLinkProgram && glValidateProgram && glGetProgramiv && glGetProgramInfoLog &&
glUseProgram;
}
#endif
// Función para compilar un shader a partir de un std::string
GLuint compileShader(const std::string &source, GLuint shader_type)
{
if (source.empty())
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "ERROR FATAL: El código fuente del shader está vacío.");
throw std::runtime_error("ERROR FATAL: El código fuente del shader está vacío.");
}
// Crear identificador del shader
GLuint shader_id = glCreateShader(shader_type);
// Agregar una directiva según el tipo de shader
std::string directive = (shader_type == GL_VERTEX_SHADER)
? "#define VERTEX\n"
: "#define FRAGMENT\n";
const char *sources[2] = {directive.c_str(), source.c_str()};
// Especificar el código fuente del shader
glShaderSource(shader_id, 2, sources, nullptr);
// Compilar el shader
glCompileShader(shader_id);
// Verificar si la compilación fue exitosa
GLint compiled_ok = GL_FALSE;
glGetShaderiv(shader_id, GL_COMPILE_STATUS, &compiled_ok);
if (compiled_ok != GL_TRUE)
{
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Error en la compilación del shader (%d)!", shader_id);
GLint log_length;
glGetShaderiv(shader_id, GL_INFO_LOG_LENGTH, &log_length);
if (log_length > 0)
{
std::vector<GLchar> log(log_length);
glGetShaderInfoLog(shader_id, log_length, &log_length, log.data());
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Registro de compilación del shader: %s", log.data());
}
glDeleteShader(shader_id);
shader_id = 0;
}
return shader_id;
}
// Función para compilar un programa de shaders (vertex y fragment) a partir de std::string
GLuint compileProgram(const std::string &vertex_shader_source, const std::string &fragment_shader_source)
{
GLuint program_id = glCreateProgram();
// Si el fragment shader está vacío, reutilizamos el código del vertex shader
GLuint vertex_shader_id = compileShader(vertex_shader_source, GL_VERTEX_SHADER);
GLuint fragment_shader_id = compileShader(fragment_shader_source.empty() ? vertex_shader_source : fragment_shader_source, GL_FRAGMENT_SHADER);
if (vertex_shader_id && fragment_shader_id)
{
// Asociar los shaders al programa
glAttachShader(program_id, vertex_shader_id);
glAttachShader(program_id, fragment_shader_id);
glLinkProgram(program_id);
glValidateProgram(program_id);
// Verificar el estado del enlace
GLint log_length;
glGetProgramiv(program_id, GL_INFO_LOG_LENGTH, &log_length);
if (log_length > 0)
{
std::vector<char> log(log_length);
glGetProgramInfoLog(program_id, log_length, &log_length, log.data());
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Registro de información del programa:\n%s", log.data());
}
}
if (vertex_shader_id)
{
glDeleteShader(vertex_shader_id);
}
if (fragment_shader_id)
{
glDeleteShader(fragment_shader_id);
}
return program_id;
}
bool init(SDL_Window *window, SDL_Texture *back_buffer_texture, const std::string &vertex_shader, const std::string &fragment_shader)
{
shader::win = window;
shader::renderer = SDL_GetRenderer(window);
shader::backBuffer = back_buffer_texture;
SDL_GetWindowSize(window, &win_size.x, &win_size.y);
SDL_GetTextureSize(back_buffer_texture, &tex_size.x, &tex_size.y);
const auto render_name = SDL_GetRendererName(renderer);
// Verificar que el renderer sea OpenGL
if (!strncmp(render_name, "opengl", 6))
{
#ifndef __APPLE__
if (!initGLExtensions())
{
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "ADVERTENCIA: No se han podido inicializar las extensiones de OpenGL.");
usingOpenGL = false;
return false;
}
#endif
// Compilar el programa de shaders utilizando std::string
programId = compileProgram(vertex_shader, fragment_shader);
}
else
{
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "ADVERTENCIA: El driver del renderer no es OpenGL.");
usingOpenGL = false;
return false;
}
usingOpenGL = true;
return true;
}
void render()
{
GLint oldProgramId;
// Establece el color de fondo
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
SDL_SetRenderTarget(renderer, nullptr);
SDL_RenderClear(renderer);
if (usingOpenGL)
{
SDL_GetTextureProperties(backBuffer);
glBindTexture(GL_TEXTURE_2D, 1);
if (programId != 0)
{
glGetIntegerv(GL_CURRENT_PROGRAM, &oldProgramId);
glUseProgram(programId);
}
// Recupera el tamaño lógico configurado con SDL_RenderSetLogicalSize
int logicalW, logicalH;
SDL_RendererLogicalPresentation mode;
SDL_GetRenderLogicalPresentation(renderer, &logicalW, &logicalH, &mode);
if (logicalW == 0 || logicalH == 0)
{
logicalW = win_size.x;
logicalH = win_size.y;
}
// Cálculo del viewport
int viewportX = 0, viewportY = 0, viewportW = win_size.x, viewportH = win_size.y;
const bool USE_INTEGER_SCALE = mode == SDL_LOGICAL_PRESENTATION_INTEGER_SCALE;
if (USE_INTEGER_SCALE)
{
// Calcula el factor de escalado entero máximo que se puede aplicar
int scaleX = win_size.x / logicalW;
int scaleY = win_size.y / logicalH;
int scale = (scaleX < scaleY ? scaleX : scaleY);
if (scale < 1)
{
scale = 1;
}
viewportW = logicalW * scale;
viewportH = logicalH * scale;
viewportX = (win_size.x - viewportW) / 2;
viewportY = (win_size.y - viewportH) / 2;
}
else
{
// Letterboxing: preserva la relación de aspecto usando una escala flotante
float windowAspect = static_cast<float>(win_size.x) / win_size.y;
float logicalAspect = static_cast<float>(logicalW) / logicalH;
if (windowAspect > logicalAspect)
{
viewportW = static_cast<int>(logicalAspect * win_size.y);
viewportX = (win_size.x - viewportW) / 2;
}
else
{
viewportH = static_cast<int>(win_size.x / logicalAspect);
viewportY = (win_size.y - viewportH) / 2;
}
}
glViewport(viewportX, viewportY, viewportW, viewportH);
// Configurar la proyección ortográfica usando el espacio lógico
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Queremos que el origen esté en la esquina superior izquierda del espacio lógico.
glOrtho(0, static_cast<GLdouble>(logicalW), static_cast<GLdouble>(logicalH), 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// Dibuja el quad con las coordenadas ajustadas.
// Se asignan las coordenadas de textura "normales" para que no quede espejado horizontalmente,
// y se mantiene el flip vertical para que la imagen no aparezca volteada.
glBegin(GL_TRIANGLE_STRIP);
// Vértice superior izquierdo
glTexCoord2f(0.0f, 1.0f);
glVertex2f(0.0f, 0.0f);
// Vértice superior derecho
glTexCoord2f(1.0f, 1.0f);
glVertex2f(static_cast<GLfloat>(logicalW), 0.0f);
// Vértice inferior izquierdo
glTexCoord2f(0.0f, 0.0f);
glVertex2f(0.0f, static_cast<GLfloat>(logicalH));
// Vértice inferior derecho
glTexCoord2f(1.0f, 0.0f);
glVertex2f(static_cast<GLfloat>(logicalW), static_cast<GLfloat>(logicalH));
glEnd();
SDL_GL_SwapWindow(win);
if (programId != 0)
{
glUseProgram(oldProgramId);
}
}
else
{
SDL_RenderTexture(renderer, backBuffer, nullptr, nullptr);
SDL_RenderPresent(renderer);
}
}
}

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#pragma once
#include <SDL3/SDL_render.h> // Para SDL_Texture
#include <SDL3/SDL_video.h> // Para SDL_Window
#include <string>
namespace shader
{
bool init(SDL_Window *ventana, SDL_Texture *texturaBackBuffer, const std::string &vertexShader, const std::string &fragmentShader = "");
void render();
}

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