- Ara si

- Ajustada versió després del merge

data/main.lua

@@ -2,6 +2,8 @@
 
 x=0
 rot=0
+music_states = { "INVALID", "PLAYING", "PAUSED", "STOPPED", "DISABLED" }
+music_pos = 0
 
 function mini.init()
     s = surf.load("gfx/logo.gif")
@@ -18,6 +20,7 @@ function mini.init()
     print("========================")
 
     f = font.load("font.fnt")
+    --music.play("mus_menu.ogg")
 end
 
 function mini.update()
@@ -50,4 +53,30 @@ function mini.update()
     draw.text("0146",100,50,28)
     font.current(font.DEFAULT)
     rot=rot+1
+
+    -- MUSICA
+    draw.text("music:", 1, 20, 22)
+    draw.text("duration:" .. music.duration(), 1, 28, 28)
+    draw.text("position:" .. music.pos(), 1, 36, 28)
+    draw.text("state: " .. music_states[music.state()+1], 1, 44, 28)
+
+    if key.press(key.P) then
+        if music.state() == music.PLAYING then
+            music.pause()
+        elseif music.state() == music.PAUSED then
+            music.resume()
+        else
+            music.play("mus_menu.ogg")
+        end
+    elseif key.press(key.S) then
+        music.stop()
+    elseif key.press(key.C) then
+        if music.state() == music.PLAYING then
+            music_pos = music.pos()
+            music.stop()
+        else
+            music.play("mus_menu.ogg")
+            music.pos(music_pos)
+        end
+    end
 end

lagueirtofile

@@ -25,3 +25,19 @@ libs = -lmingw32 -lSDL3 -lopengl32
 executable = mini_debug.exe
 sourcepath = source+
 buildpath = build
+
+[macos]
+compiler = clang++
+cppflags = -Wall -Os -Wno-deprecated -ffunction-sections -fdata-sections -std=c++20 -Isource
+libs = -lSDL3 -framework OpenGL
+executable = mini
+sourcepath = source+
+buildpath = build
+
+[macos_debug]
+compiler = clang++
+cppflags = -D DEBUG -g -Wall -Wno-deprecated -std=c++20 -Isource
+libs = -lSDL3 -framework OpenGL
+executable = mini_debug
+sourcepath = source+
+buildpath = build

source/backends/SDL3/audio.cpp

@@ -1,16 +1,16 @@
-#ifndef JA_USESDLMIXER
-#include "jail_audio.h"
+#if BACKEND == SDL3
+
+#include "backends/backend.h"
+#include "state.h"
 #include "external/stb_vorbis.h"
 #include "other/log.h"
 
-#include <SDL3/SDL.h>
-
 #include <stdio.h>
 #include <vector>
 
 // structs i variables
 // =============================
-namespace jail
+namespace backend
 {
     namespace audio
     {
@@ -22,14 +22,17 @@ namespace jail
         {
             struct music_t
             {
-                SDL_AudioSpec       spec        { SDL_AUDIO_S16, 2, 48000 };
-                Uint32              length      { 0 };
-                Uint8               *buffer     { nullptr };
+                SDL_AudioSpec       spec { SDL_AUDIO_S16, 2, 48000 };
+                SDL_AudioStream*    stream { nullptr };
 
-                int                 pos         { 0 };
-                int                 times       { 0 };
-                SDL_AudioStream     *stream     { nullptr };
-                music::state        state       { music::state::invalid };
+                const uint8_t*      ogg_data { nullptr };
+                uint32_t            ogg_length { 0 };
+
+                stb_vorbis*         vorbis { nullptr };
+                stb_vorbis_info     info {};
+
+                int                 times { 0 };
+                music::state        state { music::state::invalid };
             };
 
             static int                      current  { -1 };
@@ -79,17 +82,19 @@ namespace jail
 
 // Funcions
 // ==================
-namespace jail
+namespace backend
 {
     namespace audio
     {
         static void updateMusic()
         {
             if (!music::enabled) return;
-            if (music::current < 0 || music::current > static_cast<int>(music::musics.size())) return;
-            auto &m = music::musics[music::current];
+            if (music::current < 0) return;
+
+            auto& m = music::musics[music::current];
             if (m.state != music::state::playing) return;
 
+            // Fade-out
             if (music::fade::fading) {
                 int time = SDL_GetTicks();
                 if (time > (music::fade::start_time + music::fade::duration)) {
@@ -97,23 +102,37 @@ namespace jail
                     music::stop();
                     return;
                 } else {
-                    const int time_passed = time - music::fade::start_time;
-                    const float percent = (float)time_passed / (float)music::fade::duration;
-                    SDL_SetAudioStreamGain(m.stream, 1.0 - percent);
+                    float percent = float(time - music::fade::start_time) / float(music::fade::duration);
+                    SDL_SetAudioStreamGain(m.stream, 1.0f - percent);
                 }
             }
 
-            if (m.times != 0)
-            {
-                if (SDL_GetAudioStreamAvailable(m.stream) < static_cast<int>(m.length/2)) {
-                    SDL_PutAudioStreamData(m.stream, m.buffer, m.length);
+            // ¿Hay suficiente audio en el stream?
+            if (SDL_GetAudioStreamAvailable(m.stream) > 48000) return; // 1 segundo
+
+            // Decodificar un bloque
+            const int SAMPLES = 4096;
+            static int16_t temp[SAMPLES * 2];
+
+            int n = stb_vorbis_get_samples_short_interleaved(
+                m.vorbis,
+                m.info.channels,
+                temp,
+                SAMPLES
+            );
+
+            if (n == 0) {
+                if (m.times != 0) {
+                    stb_vorbis_seek_start(m.vorbis);
+                    if (m.times > 0) m.times--;
+                    return;
+                } else {
+                    music::stop();
+                    return;
                 }
-                if (m.times>0) m.times--;
-            }
-            else
-            {
-                if (SDL_GetAudioStreamAvailable(m.stream) == 0) music::stop();
             }
+
+            SDL_PutAudioStreamData(m.stream, temp, n * m.info.channels * sizeof(int16_t));
         }
 
         static void updateSound()
@@ -193,26 +212,31 @@ namespace jail
         {
             int load(const uint8_t* buffer, uint32_t length)
             {
-                int music = 0;
-                while (music < static_cast<int>(musics.size()) && musics[music].state != state::invalid) { music++; }
-                if (music == static_cast<int>(musics.size())) musics.emplace_back();
+                int idx = 0;
+                while (idx < (int)musics.size() && musics[idx].state != state::invalid) idx++;
+                if (idx == (int)musics.size()) musics.emplace_back();
 
-                auto &m = musics[music];
+                auto& m = musics[idx];
 
-                int chan, samplerate;
-                short *output;
-                m.length = stb_vorbis_decode_memory(buffer, length, &chan, &samplerate, &output) * chan * 2;
+                m.ogg_data = buffer;
+                m.ogg_length = length;
 
-                m.spec.channels = chan;
-                m.spec.freq = samplerate;
+                int error;
+                m.vorbis = stb_vorbis_open_memory(buffer, length, &error, nullptr);
+                if (!m.vorbis) {
+                    log_msg(LOG_FAIL, "stb_vorbis_open_memory failed: %d\n", error);
+                    return -1;
+                }
+
+                m.info = stb_vorbis_get_info(m.vorbis);
+
+                m.spec.channels = m.info.channels;
+                m.spec.freq = m.info.sample_rate;
                 m.spec.format = SDL_AUDIO_S16;
-                m.buffer = (uint8_t*)SDL_malloc(m.length);
-                SDL_memcpy(m.buffer, output, m.length);
-                free(output);
-                m.pos = 0;
+
                 m.state = state::stopped;
 
-                return music;
+                return idx;
             }
 
             int load(const char* filename)
@@ -235,23 +259,19 @@ namespace jail
 
             void play(int mus, int loop)
             {
-                if (!music::enabled) return;
                 stop();
-                if (mus < 0 || mus >= static_cast<int>(musics.size())) {
-                    log_msg(LOG_FAIL, "music::play: Illegal music handle: %i\n", mus);
-                    return;
-                }
 
                 current = mus;
-                auto &m = musics[current];
-                m.pos = 0;
-                m.state = state::playing;
+                auto& m = musics[mus];
+
                 m.times = loop;
+                m.state = state::playing;
+
+                stb_vorbis_seek_start(m.vorbis);
+
                 m.stream = SDL_CreateAudioStream(&m.spec, &audioSpec);
-                if (!SDL_PutAudioStreamData(m.stream, m.buffer, m.length)) log_msg(LOG_FAIL, "SDL_PutAudioStreamData failed!\n");
                 SDL_SetAudioStreamGain(m.stream, volume);
-                if (!SDL_BindAudioStream(sdlAudioDevice, m.stream)) log_msg(LOG_FAIL, "SDL_BindAudioStream failed!\n");
-                //SDL_ResumeAudioStreamDevice(current->stream);
+                SDL_BindAudioStream(sdlAudioDevice, m.stream);
             }
 
             void pause()
@@ -292,22 +312,15 @@ namespace jail
 
             void stop()
             {
-                if (!music::enabled || (current<0)) return;
-                if (current>static_cast<int>(musics.size())) {
-                    log_msg(LOG_FAIL, "music::stop: Illegal music handle: %i\n", current);
-                    return;
-                }
-                auto &m = musics[current];
-                if (m.state == state::invalid) {
-                    log_msg(LOG_FAIL, "music::stop: Invalidated music handle: %i\n", current);
-                    return;
-                }
+                if (current < 0) return;
+
+                auto& m = musics[current];
 
-                m.pos = 0;
                 m.state = state::stopped;
-                //SDL_PauseAudioStreamDevice(current->stream);
-                SDL_DestroyAudioStream(m.stream);
+
+                if (m.stream) SDL_DestroyAudioStream(m.stream);
                 m.stream = nullptr;
+                current = -1;
             }
 
             void fadeOut(int milliseconds)
@@ -338,16 +351,16 @@ namespace jail
 
             void destroy(int mus)
             {
-                if (current == mus) current = -1;
-                if (mus<0 || mus>static_cast<int>(musics.size())) {
-                    log_msg(LOG_FAIL, "music::destroy: Illegal music handle: %i\n", mus);
-                    return;
-                }
-                auto &m = musics[mus];
-                SDL_free(m.buffer);
-                m.buffer = nullptr;
+                if (mus < 0 || mus >= (int)musics.size()) return;
+
+                auto& m = musics[mus];
+
                 if (m.stream) SDL_DestroyAudioStream(m.stream);
+                if (m.vorbis) stb_vorbis_close(m.vorbis);
+
                 m.stream = nullptr;
+                m.vorbis = nullptr;
+
                 m.state = state::invalid;
             }
 
@@ -365,34 +378,50 @@ namespace jail
 
             void setPosition(float value)
             {
-                if (!music::enabled) return;
-                if (current<0 || current>static_cast<int>(musics.size())) {
-                    log_msg(LOG_FAIL, "music::setPosition: Illegal music handle: %i\n", current);
-                    return;
-                }
-                auto &m = musics[current];
-                if (m.state == state::invalid) {
-                    log_msg(LOG_FAIL, "music::setPosition: Invalidated music handle: %i\n", current);
-                    return;
-                }
+                auto& m = musics[current];
 
-                m.pos = value * m.spec.freq;
+                int sample = int(value * m.info.sample_rate);
+
+                if (stb_vorbis_seek(m.vorbis, sample)) {
+                    SDL_ClearAudioStream(m.stream); // importante
+                }
             }
 
             float getPosition()
             {
                 if (!music::enabled) return 0;
                 if (current<0 || current>static_cast<int>(musics.size())) {
-                    log_msg(LOG_FAIL, "music::getPosition: Illegal music handle: %i\n", current);
+                    //log_msg(LOG_FAIL, "music::getPosition: Illegal music handle: %i\n", current);
                     return 0;
                 }
                 auto &m = musics[current];
                 if (m.state == state::invalid) {
-                    log_msg(LOG_FAIL, "music::getPosition: Invalidated music handle: %i\n", current);
+                    //log_msg(LOG_FAIL, "music::getPosition: Invalidated music handle: %i\n", current);
+                    return 0;
+                }
+                int sample = stb_vorbis_get_sample_offset(m.vorbis);
+                return float(sample) / float(m.info.sample_rate);
+            }
+
+            float getDuration()
+            {
+                if (!music::enabled) return 0;
+                if (current < 0 || current > static_cast<int>(musics.size())) {
+                    //log_msg(LOG_FAIL, "music::getDuration: Illegal music handle: %i\n", current);
                     return 0;
                 }
 
-                return float(m.pos)/float(m.spec.freq);
+                auto &m = musics[current];
+                if (m.state == state::invalid) {
+                    //log_msg(LOG_FAIL, "music::getDuration: Invalidated music handle: %i\n", current);
+                    return 0;
+                }
+
+                // Total de muestras del stream
+                int total_samples = stb_vorbis_stream_length_in_samples(m.vorbis);
+
+                // Convertir a segundos
+                return float(total_samples) / float(m.info.sample_rate);
             }
 
             void enable(bool value)

source/backends/SDL3/shader.cpp

@@ -0,0 +1,246 @@
+#if BACKEND == SDL3
+
+#include "backends/backend.h"
+#include "state.h"
+#include "mini/file/file.h"
+#include "mini/win/win.h"
+
+#include <iostream>
+
+#ifdef __APPLE__
+    #include <CoreFoundation/CoreFoundation.h>
+    #include <OpenGL/OpenGL.h>
+
+    #if ESSENTIAL_GL_PRACTICES_SUPPORT_GL3
+        #include <OpenGL/gl3.h>
+    #else
+        #include <OpenGL/gl.h>
+    #endif //!ESSENTIAL_GL_PRACTICES_SUPPORT_GL3
+#else
+    #include <SDL3/SDL_opengl.h>
+    #include <SDL3/SDL_opengl_glext.h>
+#endif
+
+namespace backend
+{
+    namespace shader
+    {
+        GLuint programId = 0;
+        SDL_Point win_size = {640, 480};
+        SDL_FPoint tex_size = {320, 240};
+        bool can_use_opengl = false;
+        bool using_opengl = false;
+
+        #ifndef __APPLE__
+
+            // I'm avoiding the use of GLEW or some extensions handler, but that 
+            // doesn't mean you should...
+            PFNGLCREATESHADERPROC glCreateShader;
+            PFNGLSHADERSOURCEPROC glShaderSource;
+            PFNGLCOMPILESHADERPROC glCompileShader;
+            PFNGLGETSHADERIVPROC glGetShaderiv;
+            PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
+            PFNGLDELETESHADERPROC glDeleteShader;
+            PFNGLATTACHSHADERPROC glAttachShader;
+            PFNGLCREATEPROGRAMPROC glCreateProgram;
+            PFNGLDELETEPROGRAMPROC glDeleteProgram;
+            PFNGLLINKPROGRAMPROC glLinkProgram;
+            PFNGLVALIDATEPROGRAMPROC glValidateProgram;
+            PFNGLGETPROGRAMIVPROC glGetProgramiv;
+            PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
+            PFNGLUSEPROGRAMPROC glUseProgram;
+            PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
+            PFNGLACTIVETEXTUREPROC glActiveTexture;
+
+
+            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");
+                glDeleteProgram = (PFNGLDELETEPROGRAMPROC)SDL_GL_GetProcAddress("glDeleteProgram");
+                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");
+                glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)SDL_GL_GetProcAddress("glGetUniformLocation");
+                glActiveTexture = (PFNGLACTIVETEXTUREPROC)SDL_GL_GetProcAddress("glActiveTexture");
+
+                return glCreateShader && glShaderSource && glCompileShader && glGetShaderiv && 
+                    glGetShaderInfoLog && glDeleteShader && glAttachShader && glCreateProgram &&
+                    glDeleteProgram && glLinkProgram && glValidateProgram && glGetProgramiv &&
+                    glGetProgramInfoLog && glUseProgram && glGetUniformLocation;
+            }
+
+        #endif
+
+        GLuint compileShader(const char* source, GLuint shaderType) {
+            // Create ID for shader
+            GLuint result = glCreateShader(shaderType);
+            // Add define depending on shader type
+            const char *sources[2] = { shaderType==GL_VERTEX_SHADER?"#define VERTEX\n":"#define FRAGMENT\n", source };
+            // Define shader text
+            glShaderSource(result, 2, sources, NULL);
+            // Compile shader
+            glCompileShader(result);
+
+            //Check vertex shader for errors
+            GLint shaderCompiled = GL_FALSE;
+            glGetShaderiv( result, GL_COMPILE_STATUS, &shaderCompiled );
+            if (shaderCompiled != GL_TRUE)
+            {
+                std::cout << "Error en la compilación: " << result << "!" << std::endl;
+                GLint logLength;
+                glGetShaderiv(result, GL_INFO_LOG_LENGTH, &logLength);
+                if (logLength > 0)
+                {
+                    GLchar *log = (GLchar*)malloc(logLength);
+                    glGetShaderInfoLog(result, logLength, &logLength, log);
+                    std::cout << "Shader compile log:" << log << std::endl;
+                    //std::cout << source << std::endl;
+                    free(log);
+                }
+                glDeleteShader(result);
+                result = 0;
+            }
+            return result;
+        }
+
+        GLuint compileProgram(const char* vertexShaderSource, const char* fragmentShaderSource)
+        {
+            GLuint programId = 0;
+            GLuint vtxShaderId, fragShaderId;
+
+            if (programId != 0) glDeleteProgram(programId);
+            programId = glCreateProgram();
+            
+
+            vtxShaderId = compileShader(vertexShaderSource, GL_VERTEX_SHADER);
+            fragShaderId = compileShader(fragmentShaderSource?fragmentShaderSource:vertexShaderSource, GL_FRAGMENT_SHADER);
+
+            if(vtxShaderId && fragShaderId)
+            {
+                // Associate shader with program
+                glAttachShader(programId, vtxShaderId);
+                glAttachShader(programId, fragShaderId);
+                glLinkProgram(programId);
+                glValidateProgram(programId);
+
+                // Check the status of the compile/link
+                GLint logLen;
+                glGetProgramiv(programId, GL_INFO_LOG_LENGTH, &logLen);
+                if (logLen > 0)
+                {
+                    char* log = (char*) malloc(logLen * sizeof(char));
+                    // Show any errors as appropriate
+                    glGetProgramInfoLog(programId, logLen, &logLen, log);
+                    std::cout << "Prog Info Log: " << std::endl << log << std::endl;
+                    free(log);
+                }
+            }
+            if (vtxShaderId) glDeleteShader(vtxShaderId);
+            if (fragShaderId) glDeleteShader(fragShaderId);
+            return programId;
+        }
+
+        void init(const char* vshader, const char* fshader)
+        {
+            int filesize;
+            char *vshaderfile = mini::file::getfilebuffer(vshader, filesize, true);
+            
+            char *fshaderfile = nullptr;
+            if (fshader) { fshaderfile = mini::file::getfilebuffer(fshader, filesize, true); }
+
+            SDL_GetWindowSize(video::window, &win_size.x, &win_size.y);
+            SDL_GetTextureSize(video::tex_shader, &tex_size.x, &tex_size.y);
+
+            SDL_PropertiesID props = SDL_GetTextureProperties(video::tex_shader);
+            int access = SDL_GetNumberProperty(props, SDL_PROP_TEXTURE_ACCESS_NUMBER, -1);
+            if (access != SDL_TEXTUREACCESS_TARGET) {
+                std::cout << "ERROR FATAL: La textura per al render ha de tindre SDL_TEXTUREACCESS_TARGET definit." << std::endl;
+                ::exit(1);
+            }
+            const char * renderer_name = SDL_GetRendererName(backend::video::renderer);
+            if(!strncmp(renderer_name, "opengl", 6)) {
+    #ifndef __APPLE__
+                static bool gl_extensions_initialized = false;
+                if (!gl_extensions_initialized) {
+                    if (!initGLExtensions()) {
+                        std::cout << "WARNING: No s'han pogut inicialitzar les extensions d'OpenGL!" << std::endl;
+                        can_use_opengl = false;
+                        return;
+                    }
+                    gl_extensions_initialized = true;
+                }
+    #endif
+                // Compilar el shader y dejarlo listo para usar.
+                if (!vshaderfile) {
+                    can_use_opengl = false;
+                    return;
+                }
+                programId = compileProgram(vshaderfile, fshaderfile);
+            } else {
+                std::cout << "WARNING: El driver del renderer no es OpenGL." << std::endl;
+                can_use_opengl = false;
+                return;
+            }
+            can_use_opengl = true;
+            return;
+        }
+
+        void enable() { if (can_use_opengl) using_opengl = true; }
+        void disable() { using_opengl = false; }
+
+        void render()
+        {
+            SDL_FlushRenderer(backend::video::renderer);
+            SDL_SetRenderTarget(backend::video::renderer, NULL);
+            SDL_SetRenderDrawColor(backend::video::renderer, 0, 0, 0, 255);
+            SDL_RenderClear(backend::video::renderer);
+            SDL_FlushRenderer(backend::video::renderer);
+
+            if (using_opengl)
+            {
+                GLint oldProgramId;
+                if (programId != 0)
+                {
+                    glGetIntegerv(GL_CURRENT_PROGRAM, &oldProgramId);
+                    glUseProgram(programId);
+                }
+
+                glEnable(GL_TEXTURE_2D);
+                glActiveTexture(GL_TEXTURE0);
+                glBindTexture(GL_TEXTURE_2D, 1);
+                glViewport(0, 0, win_size.x, win_size.y);
+                
+                glBegin(GL_TRIANGLE_STRIP);
+                    glTexCoord2f(0.0f, 0.0f);
+                    glVertex2f(-1.0f, -1.0f);
+                    glTexCoord2f(tex_size.x, 0.0f);
+                    glVertex2f(1.0f, -1.0f);
+                    glTexCoord2f(0.0f, tex_size.y);
+                    glVertex2f(-1.0f, 1.0f);
+                    glTexCoord2f(tex_size.x, tex_size.y);
+                    glVertex2f(1.0f, 1.0f);
+                glEnd();
+
+                SDL_GL_SwapWindow(backend::video::window);
+
+                if (programId != 0) glUseProgram(oldProgramId);
+
+            } else {
+                SDL_RenderTexture(backend::video::renderer, backend::video::tex_shader, NULL, NULL);
+                SDL_RenderPresent(backend::video::renderer);
+            }
+            if (glGetError()) { printf("GLERROR!\n"); ::exit(1); }
+        }
+
+    }
+}
+
+#endif

source/backends/SDL3/video.cpp

@@ -43,11 +43,6 @@ namespace backend
             // Crear textura shaders i inicialitzar shaders
             tex_shader = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_TARGET, width*zoom, height*zoom);
             SDL_SetTextureScaleMode(tex_shader, SDL_SCALEMODE_NEAREST);
-            
-            mini::shader::init(window, tex_shader, nullptr);
-            
-            // [TODO]
-            //log_msg(LOG_OK, "Graphics subsystem initialized\n");
         }
 
         void quit() {
@@ -72,7 +67,7 @@ namespace backend
             SDL_UnlockTexture(tex_back);
             SDL_RenderTexture(renderer, tex_back, NULL, NULL); //NEW
 
-            mini::shader::render();
+            backend::shader::render();
 
             //SDL_RenderTexture(mini_ren, mini_bak, NULL, NULL);
             //SDL_RenderPresent(mini_ren);

source/backends/backend.h

@@ -33,10 +33,11 @@ namespace backend
         void cursor(const bool value);
     }
 
-    namespace audio
+    namespace shader
     {
-        void init();
-        void quit();
+        void init(const char* vshader, const char* fshader);
+        void enable();
+        void disable();
         void render();
     }
 
@@ -74,4 +75,54 @@ namespace backend
             int press();
         }
     }
+
+    namespace audio
+    {
+        void init();
+        void quit();
+
+        namespace music
+        {
+            enum state { invalid=0, playing=1, paused=2, stopped=3, disabled=4 };
+
+            int load(const char* filename);
+            int load(const uint8_t* buffer, uint32_t length);
+            void play(int mus, int loop = -1);
+            void pause();
+            void resume();
+            void stop();
+            void fadeOut(int milliseconds);
+            state getState();
+            void destroy(int mus);
+            float setVolume(float vol);
+            void setPosition(float value);
+            float getPosition();
+            float getDuration();
+            void enable(bool value);
+            bool isEnabled();
+        }
+
+        namespace sound
+        {
+            int create(uint8_t* buffer, uint32_t length);
+            int load(uint8_t* buffer, uint32_t length);
+            int load(const char* filename);
+            int play(int snd, int loop = 0);
+            int playOnChannel(int snd, int chan, int loop = 0);
+            void destroy(int snd);
+            float setVolume(float vol);
+            void enable(bool value);
+            bool isEnabled();
+
+            namespace channel
+            {
+                enum state { invalid, free, playing, paused, disabled };
+                void pause(int chan);
+                void resume(int chan);
+                void stop(int chan);
+                state getState(int chan);
+            }
+        }
+    }
+
 }

source/external/stb_vorbis.h

@@ -1401,12 +1401,13 @@ static int set_file_offset(stb_vorbis *f, unsigned int loc)
    #endif
    f->eof = 0;
    if (USE_MEMORY(f)) {
-      if (f->stream_start + loc >= f->stream_end || f->stream_start + loc < f->stream_start) {
+      uint8_t *pos = f->stream_start + loc;
+      if (pos >= f->stream_end || pos < f->stream_start) {
          f->stream = f->stream_end;
          f->eof = 1;
          return 0;
       } else {
-         f->stream = f->stream_start + loc;
+         f->stream = pos;
          return 1;
       }
    }

source/mini/audio/audio.cpp

@@ -1,5 +1,5 @@
 #include "audio.h"
-#include "jail_audio.h"
+#include "backends/backend.h"
 #include "mini/file/file.h"
 
 namespace mini
@@ -7,18 +7,13 @@ namespace mini
     namespace audio
     {
         int current_music = -1;
-        //#define MAX_SOUNDS 50
-        //JA_Sound_t *sounds[MAX_SOUNDS];
 
         void init() {
-            jail::audio::init();
-            //for (int i=0;i<MAX_SOUNDS;++i) sounds[i] = NULL;
+            backend::audio::init();
         }
 
         void quit() {
-            //if (current_music != NULL) JA_DeleteMusic(current_music);
-            //for (int i=0;i<MAX_SOUNDS;++i) if (sounds[i]!=NULL) JA_DeleteSound(sounds[i]);
-            jail::audio::quit();
+            backend::audio::quit();
         }
 
         namespace music
@@ -26,45 +21,53 @@ namespace mini
             void play(const char *filename, const int loop) {
                 int size;
                 char *buffer = file::getfilebuffer(filename, size);
-                if (current_music != -1) jail::audio::music::destroy(current_music);
-                current_music = jail::audio::music::load((uint8_t*)buffer, size);
-                jail::audio::music::play(current_music, loop);
+                if (current_music != -1) backend::audio::music::destroy(current_music);
+                current_music = backend::audio::music::load((uint8_t*)buffer, size);
+                backend::audio::music::play(current_music, loop);
             }
 
             void pause() {
-                jail::audio::music::pause();
+                backend::audio::music::pause();
             }
 
             void resume() {
-                jail::audio::music::resume();
+                backend::audio::music::resume();
             }
 
             void stop(const int t) {
-                jail::audio::music::stop();
+                backend::audio::music::stop();
+            }
+
+            float duration() {
+                return backend::audio::music::getDuration();
+            }
+
+            int state() {
+                return backend::audio::music::getState();
             }
 
             namespace pos {
                 void set(float value)
                 {
-                    jail::audio::music::setPosition(value);
+                    backend::audio::music::setPosition(value);
                 }
 
                 float get()
                 {
-                    return jail::audio::music::getPosition();
+                    return backend::audio::music::getPosition();
                 }
             }
 
             namespace enable {
                 void set(const bool value)
                 {
-                    jail::audio::music::enable(value);
+                    backend::audio::music::enable(value);
                     file::setconfigvalue("music", value?"true":"false");
                 }
 
                 const bool get()
                 {
-                    return jail::audio::music::isEnabled();
+                    return backend::audio::music::isEnabled();
                 }
             }
         }
@@ -74,32 +77,32 @@ namespace mini
             int load(const char *filename) {
                 int size;
                 char *buffer = file::getfilebuffer(filename, size);
-                return jail::audio::sound::load((uint8_t*)buffer, size);
+                return backend::audio::sound::load((uint8_t*)buffer, size);
             }
 
             void free(int soundfile) {
-                return jail::audio::sound::destroy(soundfile);
+                return backend::audio::sound::destroy(soundfile);
             }
 
             int play(int soundfile, const int volume) {
                 // [TODO] Ficar el volumen
-                return jail::audio::sound::play(soundfile, 0);
+                return backend::audio::sound::play(soundfile, 0);
             }
 
             void stop(int soundchannel) {
-                return jail::audio::sound::channel::stop(soundchannel);
+                return backend::audio::sound::channel::stop(soundchannel);
             }
 
             namespace enable {
                 void set(const bool value)
                 {
-                    return jail::audio::sound::enable(value);
+                    return backend::audio::sound::enable(value);
                     file::setconfigvalue("sound", value?"true":"false");
                 }
 
                 const bool get()
                 {
-                    return jail::audio::sound::isEnabled();
+                    return backend::audio::sound::isEnabled();
                 }
             }
         }

source/mini/audio/audio.h

@@ -17,6 +17,8 @@ namespace mini
                 void set(float value);
                 float get();
             }
+            float duration();
+            int state();
             namespace enable {
                 void set(const bool value);
                 const bool get();

source/mini/audio/jail_audio.h

@@ -1,57 +0,0 @@
-#pragma once
-#include <stdint.h>
-
-namespace jail
-{
-    namespace audio
-    {
-        void init(/*const int freq, const SDL_AudioFormat format, const int channels*/);
-        void quit();
-
-        namespace music
-        {
-            //struct JA_Music_t;
-            enum state { invalid, playing, paused, stopped, disabled };
-
-            int load(const char* filename);
-            int load(const uint8_t* buffer, uint32_t length);
-            void play(int mus, int loop = -1);
-            void pause();
-            void resume();
-            void stop();
-            void fadeOut(int milliseconds);
-            state getState();
-            void destroy(int mus);
-            float setVolume(float vol);
-            void setPosition(float value);
-            float getPosition();
-            void enable(bool value);
-            bool isEnabled();
-        }
-
-        namespace sound
-        {
-            //struct JA_Sound_t;
-            int create(uint8_t* buffer, uint32_t length);
-            int load(uint8_t* buffer, uint32_t length);
-            int load(const char* filename);
-            int play(int snd, int loop = 0);
-            int playOnChannel(int snd, int chan, int loop = 0);
-            void destroy(int snd);
-            float setVolume(float vol);
-            void enable(bool value);
-            bool isEnabled();
-
-            namespace channel
-            {
-                enum state { invalid, free, playing, paused, disabled };
-                void pause(int chan);
-                void resume(int chan);
-                void stop(int chan);
-                state getState(int chan);
-            }
-        }
-    }
-}
-
-

source/mini/lua/lua.wrappers.cpp

@@ -154,12 +154,12 @@ namespace mini
                 static int target(lua_State *L) {
                     const int numargs = lua_gettop(L);
                     switch (numargs) {
-                        case 0: {
+                        case 1: {
                             lua_pushinteger(L, mini::surf::target::get());
                             return 1;
                         }
-                        case 1: {
-                            uint8_t surface = luaL_checkinteger(L, 1);
+                        case 2: {
+                            uint8_t surface = luaL_checkinteger(L, 2);
                             mini::surf::target::set(surface);
                             return 0;
                         }
@@ -168,15 +168,31 @@ namespace mini
                     };
                 }
 
+                static int target_push(lua_State *L) {
+                    const int numargs = lua_gettop(L);
+                    if (numargs==1) {
+                        uint8_t surface = luaL_checkinteger(L, 1);
+                        mini::surf::target::push(surface);
+                        return 0;
+                    } else {
+                        return luaL_error(L, "Function 'surface.target.push' Unexpected number of parameters.");
+                    };
+                }
+
+                static int target_pop(lua_State *L) {
+                    mini::surf::target::pop();
+                    return 0;
+                }
+
                 static int source(lua_State *L) {
                     const int numargs = lua_gettop(L);
                     switch (numargs) {
-                        case 0: {
+                        case 1: {
                             lua_pushinteger(L, mini::surf::source::get());
                             return 1;
                         }
-                        case 1: {
-                            uint8_t surface = luaL_checkinteger(L, 1);
+                        case 2: {
+                            uint8_t surface = luaL_checkinteger(L, 2);
                             mini::surf::source::set(surface);
                             return 0;
                         }
@@ -185,6 +201,22 @@ namespace mini
                     };
                 }
 
+                static int source_push(lua_State *L) {
+                    const int numargs = lua_gettop(L);
+                    if (numargs==1) {
+                        uint8_t surface = luaL_checkinteger(L, 1);
+                        mini::surf::source::push(surface);
+                        return 0;
+                    } else {
+                        return luaL_error(L, "Function 'surface.source.push' Unexpected number of parameters.");
+                    };
+                }
+
+                static int source_pop(lua_State *L) {
+                    mini::surf::source::pop();
+                    return 0;
+                }
+
                 static int cls(lua_State *L) {
                     uint8_t color = luaL_optinteger(L, 1, 0);
                     mini::surf::cls(color);
@@ -629,6 +661,16 @@ namespace mini
                     }
                 }
 
+                static int duration(lua_State *L) {
+                    lua_pushnumber(L, mini::audio::music::duration());
+                    return 1;
+                }
+
+                static int state(lua_State *L) {
+                    lua_pushinteger(L, mini::audio::music::state());
+                    return 1;
+                }
+
                 static int enable(lua_State *L) {
                     if (lua_gettop(L) == 0) {
                         lua_pushboolean(L, mini::audio::music::enable::get());
@@ -1036,8 +1078,23 @@ namespace mini
             lua_pushcfunction(L,wrappers::surf::save);       lua_setfield(L, -2, "save");
             lua_pushcfunction(L,wrappers::surf::free);       lua_setfield(L, -2, "free");
             lua_pushcfunction(L,wrappers::surf::size);       lua_setfield(L, -2, "size");
-            lua_pushcfunction(L,wrappers::surf::target);     lua_setfield(L, -2, "target");
-            lua_pushcfunction(L,wrappers::surf::source);     lua_setfield(L, -2, "source");
+
+            lua_newtable(L);
+            lua_pushcfunction(L, wrappers::surf::target_push);lua_setfield(L, -2, "push");
+            lua_pushcfunction(L, wrappers::surf::target_pop); lua_setfield(L, -2, "pop");
+            lua_newtable(L);
+            lua_pushcfunction(L, wrappers::surf::target);    lua_setfield(L, -2, "__call");
+            lua_setmetatable(L, -2);
+            lua_setfield(L, -2, "target");
+
+            lua_newtable(L);
+            lua_pushcfunction(L, wrappers::surf::source_push);lua_setfield(L, -2, "push");
+            lua_pushcfunction(L, wrappers::surf::source_pop); lua_setfield(L, -2, "pop");
+            lua_newtable(L);
+            lua_pushcfunction(L, wrappers::surf::source);    lua_setfield(L, -2, "__call");
+            lua_setmetatable(L, -2);
+            lua_setfield(L, -2, "source");
+
             lua_pushcfunction(L,wrappers::surf::cls);        lua_setfield(L, -2, "cls");
             lua_pushcfunction(L,wrappers::surf::clip);       lua_setfield(L, -2, "clip");
 
@@ -1104,7 +1161,16 @@ namespace mini
             lua_pushcfunction(L,wrappers::music::resume);    lua_setfield(L, -2, "resume");
             lua_pushcfunction(L,wrappers::music::stop);      lua_setfield(L, -2, "stop");
             lua_pushcfunction(L,wrappers::music::pos);       lua_setfield(L, -2, "pos");
+            lua_pushcfunction(L,wrappers::music::duration);  lua_setfield(L, -2, "duration");
+            lua_pushcfunction(L,wrappers::music::state);     lua_setfield(L, -2, "state");
             lua_pushcfunction(L,wrappers::music::enable);    lua_setfield(L, -2, "enabled");
+
+            lua_pushinteger(L, 0);                           lua_setfield(L, -2, "INVALID");
+            lua_pushinteger(L, 1);                           lua_setfield(L, -2, "PLAYING");
+            lua_pushinteger(L, 2);                           lua_setfield(L, -2, "PAUSED");
+            lua_pushinteger(L, 3);                           lua_setfield(L, -2, "STOPPED");
+            lua_pushinteger(L, 4);                           lua_setfield(L, -2, "DISABLED");
+
             lua_setglobal(L, "music");
 
             lua_newtable(L);

source/mini/shader/shader.cpp

@@ -1,268 +1,20 @@
 #include "shader.h"
-#include "mini/file/file.h"
-#include "mini/win/win.h"
-
-#include <SDL3/SDL.h>
-
-#include <iostream>
-
-#ifdef __APPLE__
-    #include "CoreFoundation/CoreFoundation.h"
-    #include <OpenGL/OpenGL.h>
-
-    #if ESSENTIAL_GL_PRACTICES_SUPPORT_GL3
-        #include <OpenGL/gl3.h>
-    #else
-        #include <OpenGL/gl.h>
-    #endif //!ESSENTIAL_GL_PRACTICES_SUPPORT_GL3
-#else
-    #include <SDL3/SDL_opengl.h>
-    #include <SDL3/SDL_opengl_glext.h>
-#endif
+#include "backends/backend.h"
 
 namespace mini
 {
     namespace shader
     {
-        SDL_Window *win = nullptr;
-        SDL_Renderer *renderer = nullptr;
-        GLuint programId = 0;
-        SDL_Texture* backBuffer = nullptr;
-        SDL_Point win_size = {640, 480};
-        SDL_FPoint tex_size = {320, 240};
-        bool can_use_opengl = false;
-        bool using_opengl = false;
-        GLuint texture_number;
-        GLuint nose;
-
-        #ifndef __APPLE__
-
-            // I'm avoiding the use of GLEW or some extensions handler, but that 
-            // doesn't mean you should...
-            PFNGLCREATESHADERPROC glCreateShader;
-            PFNGLSHADERSOURCEPROC glShaderSource;
-            PFNGLCOMPILESHADERPROC glCompileShader;
-            PFNGLGETSHADERIVPROC glGetShaderiv;
-            PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
-            PFNGLDELETESHADERPROC glDeleteShader;
-            PFNGLATTACHSHADERPROC glAttachShader;
-            PFNGLCREATEPROGRAMPROC glCreateProgram;
-            PFNGLDELETEPROGRAMPROC glDeleteProgram;
-            PFNGLLINKPROGRAMPROC glLinkProgram;
-            PFNGLVALIDATEPROGRAMPROC glValidateProgram;
-            PFNGLGETPROGRAMIVPROC glGetProgramiv;
-            PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
-            PFNGLUSEPROGRAMPROC glUseProgram;
-            PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
-            PFNGLACTIVETEXTUREPROC glActiveTexture;
-
-
-            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");
-                glDeleteProgram = (PFNGLDELETEPROGRAMPROC)SDL_GL_GetProcAddress("glDeleteProgram");
-                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");
-                glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)SDL_GL_GetProcAddress("glGetUniformLocation");
-                glActiveTexture = (PFNGLACTIVETEXTUREPROC)SDL_GL_GetProcAddress("glActiveTexture");
-
-                return glCreateShader && glShaderSource && glCompileShader && glGetShaderiv && 
-                    glGetShaderInfoLog && glDeleteShader && glAttachShader && glCreateProgram &&
-                    glDeleteProgram && glLinkProgram && glValidateProgram && glGetProgramiv &&
-                    glGetProgramInfoLog && glUseProgram && glGetUniformLocation;
-            }
-
-        #endif
-
-        state_t state;
-
-        void init(const char* vshader, const char* fshader)
-        {
-            // [TODO]
-            //int filesize;
-            //char *vshaderfile = file::getfilebuffer(vshader, filesize, true);
-            //
-            //char *fshaderfile = nullptr;
-            //if (fshader) { fshaderfile = file::getfilebuffer(fshader, filesize, true); }
-            //init(win::state.window, win::state.tex_shader, vshaderfile, fshaderfile);
+        void init(const char* vshader, const char* fshader) {
+            backend::shader::init(vshader, fshader);
         }
 
-
-        GLuint compileShader(const char* source, GLuint shaderType) {
-            // Create ID for shader
-            GLuint result = glCreateShader(shaderType);
-            // Add define depending on shader type
-            const char *sources[2] = { shaderType==GL_VERTEX_SHADER?"#define VERTEX\n":"#define FRAGMENT\n", source };
-            // Define shader text
-            glShaderSource(result, 2, sources, NULL);
-            // Compile shader
-            glCompileShader(result);
-
-            //Check vertex shader for errors
-            GLint shaderCompiled = GL_FALSE;
-            glGetShaderiv( result, GL_COMPILE_STATUS, &shaderCompiled );
-            if (shaderCompiled != GL_TRUE)
-            {
-                std::cout << "Error en la compilación: " << result << "!" << std::endl;
-                GLint logLength;
-                glGetShaderiv(result, GL_INFO_LOG_LENGTH, &logLength);
-                if (logLength > 0)
-                {
-                    GLchar *log = (GLchar*)malloc(logLength);
-                    glGetShaderInfoLog(result, logLength, &logLength, log);
-                    std::cout << "Shader compile log:" << log << std::endl;
-                    //std::cout << source << std::endl;
-                    free(log);
-                }
-                glDeleteShader(result);
-                result = 0;
-            }
-            return result;
+        void enable() {
+            backend::shader::enable();
         }
 
-        GLuint compileProgram(const char* vertexShaderSource, const char* fragmentShaderSource)
-        {
-            GLuint programId = 0;
-            GLuint vtxShaderId, fragShaderId;
-
-            if (programId != 0) glDeleteProgram(programId);
-            programId = glCreateProgram();
-            
-
-            vtxShaderId = compileShader(vertexShaderSource, GL_VERTEX_SHADER);
-            fragShaderId = compileShader(fragmentShaderSource?fragmentShaderSource:vertexShaderSource, GL_FRAGMENT_SHADER);
-
-            if(vtxShaderId && fragShaderId)
-            {
-                // Associate shader with program
-                glAttachShader(programId, vtxShaderId);
-                glAttachShader(programId, fragShaderId);
-                glLinkProgram(programId);
-                glValidateProgram(programId);
-
-                // Check the status of the compile/link
-                GLint logLen;
-                glGetProgramiv(programId, GL_INFO_LOG_LENGTH, &logLen);
-                if (logLen > 0)
-                {
-                    char* log = (char*) malloc(logLen * sizeof(char));
-                    // Show any errors as appropriate
-                    glGetProgramInfoLog(programId, logLen, &logLen, log);
-                    std::cout << "Prog Info Log: " << std::endl << log << std::endl;
-                    free(log);
-                }
-            }
-            if (vtxShaderId) glDeleteShader(vtxShaderId);
-            if (fragShaderId) glDeleteShader(fragShaderId);
-            return programId;
+        void disable() {
+            backend::shader::disable();
         }
-
-        const bool init(SDL_Window* win, SDL_Texture* backBuffer, const char* vertexShader, const char* fragmentShader)
-        {
-            shader::win = win;
-            shader::renderer = SDL_GetRenderer(win);
-            shader::backBuffer = backBuffer;
-            SDL_GetWindowSize(win, &win_size.x, &win_size.y);
-            SDL_GetTextureSize(backBuffer, &tex_size.x, &tex_size.y);
-            //printf("tex size: %fx%f\n", tex_size.x, tex_size.y);
-            SDL_PropertiesID props = SDL_GetTextureProperties(backBuffer);
-            texture_number = SDL_GetNumberProperty(props, SDL_PROP_TEXTURE_OPENGL_TEXTURE_NUMBER, -1);
-            //printf("texture number: %i\n", texture_number);
-            int access = SDL_GetNumberProperty(props, SDL_PROP_TEXTURE_ACCESS_NUMBER, -1);
-            nose = SDL_GetNumberProperty(props, SDL_PROP_TEXTURE_OPENGL_TEXTURE_TARGET_NUMBER, -1);
-            //printf("texture target number: %i\n", nose);
-
-            if (access != SDL_TEXTUREACCESS_TARGET)
-            {
-                std::cout << "ERROR FATAL: La textura per al render ha de tindre SDL_TEXTUREACCESS_TARGET definit." << std::endl;
-                exit(1);
-            }
-
-            const char * renderer_name = SDL_GetRendererName(renderer);
-            //printf("rendererInfo.name: %s\n", renderer_name);
-
-            if(!strncmp(renderer_name, "opengl", 6)) {
-    #ifndef __APPLE__
-                static bool gl_extensions_initialized = false;
-                if (!gl_extensions_initialized) {
-                    if (!initGLExtensions()) {
-                        std::cout << "WARNING: No s'han pogut inicialitzar les extensions d'OpenGL!" << std::endl;
-                        can_use_opengl = false;
-                        return false;
-                    }
-                    gl_extensions_initialized = true;
-                }
-    #endif
-                // Compilar el shader y dejarlo listo para usar.
-                if (!vertexShader) {
-                    can_use_opengl = false;
-                    return false;
-                }
-                programId = compileProgram(vertexShader, fragmentShader);
-            } else {
-                std::cout << "WARNING: El driver del renderer no es OpenGL." << std::endl;
-                can_use_opengl = false;
-                return false;
-            }
-            can_use_opengl = true;
-            return true;
-        }
-
-        void enable() { if (can_use_opengl) using_opengl = true; }
-        void disable() { using_opengl = false; }
-
-        void render()
-        {
-            SDL_FlushRenderer(renderer);
-            SDL_SetRenderTarget(renderer, NULL);
-            SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
-            SDL_RenderClear(renderer);
-            SDL_FlushRenderer(renderer);
-
-            if (using_opengl)
-            {
-                GLint oldProgramId;
-                if (programId != 0)
-                {
-                    glGetIntegerv(GL_CURRENT_PROGRAM, &oldProgramId);
-                    glUseProgram(programId);
-                }
-
-                glEnable(GL_TEXTURE_2D);
-                glActiveTexture(GL_TEXTURE0);
-                glBindTexture(GL_TEXTURE_2D, 1);
-                glViewport(0, 0, win_size.x, win_size.y);
-                
-                glBegin(GL_TRIANGLE_STRIP);
-                    glTexCoord2f(0.0f, 0.0f);
-                    glVertex2f(-1.0f, -1.0f);
-                    glTexCoord2f(tex_size.x, 0.0f);
-                    glVertex2f(1.0f, -1.0f);
-                    glTexCoord2f(0.0f, tex_size.y);
-                    glVertex2f(-1.0f, 1.0f);
-                    glTexCoord2f(tex_size.x, tex_size.y);
-                    glVertex2f(1.0f, 1.0f);
-                glEnd();
-
-                SDL_GL_SwapWindow(win);
-
-                if (programId != 0) glUseProgram(oldProgramId);
-
-            } else {
-                SDL_RenderTexture(renderer, backBuffer, NULL, NULL);
-                SDL_RenderPresent(renderer);
-            }
-            if (glGetError()) { printf("GLERROR!\n"); exit(1); }
-        }
-
     }
 }

source/mini/shader/shader.h

@@ -1,27 +1,13 @@
 #pragma once
 #include <stdint.h>
 
-struct SDL_Window;
-struct SDL_Texture;
-
 namespace mini
 {
     namespace shader
     {
-        struct state_t {
-            const bool *keys;
-            uint8_t just_pressed = 0;
-            char text_input_buffer[10];
-            bool has_text_input = false;
-        };
-        extern state_t state;
-
-        const bool init(SDL_Window* win, SDL_Texture* backBuffer, const char* vertexShader, const char* fragmentShader=nullptr);
         void init(const char* vshader, const char* fshader);
 
         void enable();
         void disable();
-
-        void render();
     }
 }

source/mini/surf/surf.cpp

@@ -176,6 +176,16 @@ namespace mini
             uint8_t get() {
                 return state.dest_surface;
             }
+
+            void push(uint8_t surface) {
+                state.dest_stack.push(state.dest_surface);
+                state.dest_surface = surface;
+            }
+
+            void pop() {
+                state.dest_surface = state.dest_stack.top();
+                state.dest_stack.pop();
+            }
         }
 
         namespace source {
@@ -186,6 +196,16 @@ namespace mini
             uint8_t get() {
                 return state.source_surface;
             }
+
+            void push(uint8_t surface) {
+                state.source_stack.push(state.source_surface);
+                state.source_surface = surface;
+            }
+
+            void pop() {
+                state.source_surface = state.source_stack.top();
+                state.source_stack.pop();
+            }
         }
 
         namespace clip {

source/mini/surf/surf.h

@@ -2,6 +2,7 @@
 
 #include <stdint.h>
 #include <vector>
+#include <stack>
 
 namespace mini
 {
@@ -27,6 +28,8 @@ namespace mini
             std::vector<surface_t>   surfaces;
             int  dest_surface = -1;
             int  source_surface = -1;
+            std::stack<int>   dest_stack;
+            std::stack<int>   source_stack;
         };
         extern state_t state;
 
@@ -46,11 +49,15 @@ namespace mini
         namespace target {
             void set(uint8_t surface);
             uint8_t get();
+            void push(uint8_t surface);
+            void pop();
         }
 
         namespace source {
             void set(uint8_t surface);
             uint8_t get();
+            void push(uint8_t surface);
+            void pop();
         }
 
         namespace clip {

source/mini/version.h

@@ -1,3 +1,3 @@
 #pragma once
 
-#define MINI_VERSION "1.5.6"
+#define MINI_VERSION "1.5.13"

source/mini/win/win.cpp

@@ -2,7 +2,7 @@
 #include "other/log.h"
 #include "mini/file/file.h"
 #include "mini/shader/shader.h"
-#include <backends/backend.h>
+#include "backends/backend.h"
 
 #include <stdlib.h>
 

vscode/library.lua

@@ -38,6 +38,8 @@ function surf.free(surface) end
 ---Retrieve width and height of surface
 function surf.size(surface) end
 
+surf.target = {}
+
 ---@return number surface
 ---Get current target surface
 function surf.target() end
@@ -46,6 +48,15 @@ function surf.target() end
 ---Set surface as target
 function surf.target(surface) end
 
+---@param surface number
+---push current target to the stack and set surface as target
+function surf.target.push(surface) end
+
+---pop surface on the stack as current target
+function surf.target.pop() end
+
+surf.source = {}
+
 ---@return number surface
 ---Get current source surface
 function surf.source() end
@@ -54,6 +65,13 @@ function surf.source() end
 ---Set surface as source
 function surf.source(surface) end
 
+---@param surface number
+---push current source to the stack and set surface as source
+function surf.source.push(surface) end
+
+---pop surface on the stack and set it as current source
+function surf.source.pop() end
+
 ---Erase the current target surface with color 0.
 function surf.cls() end
 
@@ -399,6 +417,14 @@ function music.pos() end
 ---Set the playing position of the currently loaded song
 function music.pos(pos) end
 
+---@return number time
+---Get the duration of the currently loaded song
+function music.duration() end
+
+---@return integer value
+---Get the state of the music
+function music.state() end
+
 ---@return boolean value
 ---Get if music is enabled
 function music.enabled() end
@@ -407,6 +433,12 @@ function music.enabled() end
 ---Set if music is enabled or not
 function music.enabled(value) end
 
+music.INVALID  = 0
+music.PLAYING  = 1
+music.PAUSED   = 2
+music.STOPPED  = 3
+music.DISABLED = 4
+
 
 ---@class sound
 sound = {}
@@ -446,9 +478,11 @@ function sound.enabled(value) end
 ---@class sys
 sys = {}
 
+---@return number delta
 ---Get delta time from last update in seconds (with decimals)
 function sys.delta() end
 
+---@return number time
 ---Get current system timer in seconds (with decimals)
 function sys.time() end
 
@@ -456,8 +490,8 @@ function sys.time() end
 ---Reset chrono time (with offset in seconds) (with decimals)
 function sys.chrono(offset) end
 
----@return number
----@---Get chrono time since last chrono reset in seconds (with decimals)
+---@return number seconds
+---Get chrono time since last chrono reset in seconds (with decimals)
 function sys.chrono() end
 
 ---@return boolean