From 93d9689cfe1aa32147727c23170f4a039d1a7e33 Mon Sep 17 00:00:00 2001
From: JackCarterSmith <arechristopher1@gmail.com>
Date: Thu, 4 Jul 2019 16:26:38 +0200
Subject: [PATCH] Done textures decoder

Next step, convert to PNG format
---
 src/RS_images.c | 32 +++++++++++++++++---------------
 src/RS_images.h |  6 +++---
 2 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/src/RS_images.c b/src/RS_images.c
index 0283173..a29a080 100644
--- a/src/RS_images.c
+++ b/src/RS_images.c
@@ -8,6 +8,7 @@ void getPaletteFromFile(RS_IMAGE *img, FILE *f) {
 	case 16:
 	case 256:
 		fread(img->palette, sizeof(unsigned char), entries*3, f);
+		break;
 	}
 }
 
@@ -44,60 +45,61 @@ void decodePixels(RS_IMAGE *img) {
 		break;
 	case 4:
 		if (img->paletteEntries == 0) {
+			size = img->width * img->height;
 			img->pixels = calloc(1, size);
 			unpack4To8bits(img->samples, img->pixels, size);
 		} else if (img->paletteEntries == 16) {
+			size = img->width * img->height;
 			img->pixels = calloc(1, size*3);
 			unpack4To24bitsRGB(img->samples, img->pixels, size, img->palette);
 		}
 		break;
 	case 8:
 		if (img->paletteEntries == 0) {
+			size = img->width * img->height;
 			img->pixels = calloc(1, size);
 			memcpy(img->pixels, img->samples, size);
 		} else if (img->paletteEntries == 256) {
+			size = img->width * img->height;
 			img->pixels = calloc(1, size*3);
 			unpack8To24bitsRGB(img->samples, img->pixels, size, img->palette);
 		}
 		break;
 	case 16:
+		size = img->width * img->height;
 		img->pixels = calloc(1, size);
 		useOddBytes(img->samples, img->pixels, size);
 		break;
 	}
 }
 
-void unpack4To8bits(unsigned char *src, unsigned char *dst, int sampling) {
+void unpack4To8bits(unsigned char *samples_tab, unsigned char *pixels_tab, int sampling) {
 	int i;
 	char v;
 
 	for(i=0; i<div(sampling,2).quot; i++) {
-		v = src[i];
-		dst[i*2] = ((v >> 4) & 0xF) << 4;
-		dst[i*2+1] = (v & 0xF) << 4;
+		v = samples_tab[i];
+		pixels_tab[i*2] = ((v >> 4) & 0xF) << 4;
+		pixels_tab[i*2+1] = (v & 0xF) << 4;
 	}
 }
 
-void unpack4To24bitsRGB(unsigned char *src, unsigned char *dst, int size, unsigned char pal[256][3]) {
+void unpack4To24bitsRGB(unsigned char *samples_tab, unsigned char *pixels_tab, int size, unsigned char pal[256][3]) {
 	int i,index;
-	//unsigned char _pRGB[3];		//TODO: Can be remove and use 'dst' directly
 
-	//_pRGB = dst;
 	for(i=0; i<div(size,2).quot; i++) {
-		index = src[i];
-		dst[i*2] = pal[(index >> 4) & 0xF];
-		dst[i*2+1] = pal[index & 0xF];
+		index = samples_tab[i];
+		memcpy(&(pixels_tab[i*2]), pal[(index >> 4) & 0xF], sizeof(unsigned char)*3);
+		memcpy(&(pixels_tab[i*2+1]), pal[index & 0xF], sizeof(unsigned char)*3);
 	}
 }
 
-void unpack8To24bitsRGB(unsigned char *src, unsigned char *dst, int size, unsigned char pal[256][3]) {
+void unpack8To24bitsRGB(unsigned char *samples_tab, unsigned char *pixels_tab, int size, unsigned char pal[256][3]) {
 	int i,index;
-	unsigned char _pRGB[3];		//TODO: Can be remove and use 'dst' directly
 
-	_pRGB = dst;
 	for(i=0; i<size; i++) {
-		index = src[i];
-		_pRGB[i] = pal[index];
+		index = samples_tab[i];
+		memcpy(&(pixels_tab[i]), pal[index], sizeof(unsigned char)*3);
 	}
 }
 
diff --git a/src/RS_images.h b/src/RS_images.h
index 1292ee5..3c703c5 100644
--- a/src/RS_images.h
+++ b/src/RS_images.h
@@ -40,9 +40,9 @@ typedef struct RSImage_desc {
 ///// Declare functions /////
 /////////////////////////////
 RS_IMAGE_DESC getImageDescFromType(unsigned char type);		//TODO: Optimise function
-void unpack4To8bits(unsigned char *src, unsigned char *dst, int sampling);
-void unpack4To24bitsRGB(unsigned char *src, unsigned char *dst, int size, unsigned char pal[256][3]);
-void unpack8To24bitsRGB(unsigned char *src, unsigned char *dst, int size, unsigned char pal[256][3]);
+void unpack4To8bits(unsigned char *samples_tab, unsigned char *pixels_tab, int sampling);
+void unpack4To24bitsRGB(unsigned char *samples_tab, unsigned char *pixels_tab, int size, unsigned char pal[256][3]);
+void unpack8To24bitsRGB(unsigned char *samples_tab, unsigned char *pixels_tab, int size, unsigned char pal[256][3]);
 void useOddBytes(unsigned char *src, unsigned char *dst, int size);
 void decodePixels(RS_IMAGE *img);
 void getPaletteFromFile(RS_IMAGE *img, FILE *f);