From d26bb2858ccbf9bf5b30749d5b62a09252c388aa Mon Sep 17 00:00:00 2001
From: fanta <fanta@56k.es>
Date: Tue, 3 Mar 2026 12:35:12 +0100
Subject: [PATCH] f1 para activar transicion backtoblack fader

---
 presentator.c | 38 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/presentator.c b/presentator.c
index c525a91..d08addc 100644
--- a/presentator.c
+++ b/presentator.c
@@ -5,7 +5,7 @@
 #include <SDL_image.h>
 
 // Fanta <fanta@56k.es> 2026
-// Presentator 0.1
+// Presentator 0.2
 
 // Variables
 int modPlaying;
@@ -13,7 +13,7 @@ char * modName = NULL;
 int modVolume = 100;
 int iv;
 char *imgVol[] = {"res/vol100.png","res/vol090.png","res/vol080.png","res/vol070.png","res/vol060.png","res/vol050.png","res/vol040.png","res/vol030.png","res/vol020.png","res/vol010.png","res/vol000.png"};
-char windowTitle[16] = "Presentator 0.1";
+char windowTitle[16] = "Presentator 0.2";
 int windowWidth = 1024;
 int windowHeight = 768;
 char * slidesIndex = "slides/index.txt";
@@ -27,6 +27,8 @@ SDL_Texture *textureSlide = NULL;
 SDL_Texture *textureProgressRect = NULL;
 SDL_Event evento;
 xmp_context ctx;
+int transition_active = 0;
+
 
 // Functions
 int createWindow(void){
@@ -105,6 +107,23 @@ int loadSlide(int nslide){
 	return 0;
 }
 
+int transition_BackToBlack(void){
+	SDL_SetRenderDrawBlendMode(render, SDL_BLENDMODE_BLEND);
+	SDL_Rect barra = { 0, 0, windowWidth, windowHeight };
+		
+	int z;
+	for (z = 250; z > 0; z = z -10) {
+	loadSlide(actualNSlide);
+	refreshVolumeArea(iv);
+		SDL_SetRenderDrawColor(render, 0, 0, 0, z);
+		SDL_RenderFillRect(render, &barra);
+		SDL_RenderPresent(render);
+	}
+		
+	return 0;
+}
+
+
 int renderAll(void){
 	loadSlide(actualNSlide);
 	refreshVolumeArea(iv);
@@ -112,6 +131,8 @@ int renderAll(void){
 	return 0;
 }
 
+
+
 // Main
 int main(int argc, char ** argv) {
 	createWindow();
@@ -120,6 +141,10 @@ int main(int argc, char ** argv) {
 	refreshVolumeArea(0);
 	SDL_RenderPresent(render);
 
+
+
+
+
 	while (!quit) {
 		SDL_WaitEvent(&evento);
 
@@ -184,12 +209,21 @@ int main(int argc, char ** argv) {
 						break;
 					case SDLK_RIGHT:
 					    actualNSlide = actualNSlide + 1;
+					    if (transition_active == 1 ){ transition_BackToBlack(); };
 					    renderAll();
 						break;
 					case SDLK_LEFT:
 					    actualNSlide = actualNSlide - 1;
+					    if (transition_active == 1 ){ transition_BackToBlack(); };
 						renderAll();
 						break;
+					case SDLK_F1:
+						if (transition_active == 0){
+							transition_active = 1;
+						}else{
+							transition_active = 0;
+						}
+						break;
 				}
 				break;
 		}