From: John Hodge <tpg@mutabah.net>
Date: Mon, 16 May 2011 12:52:12 +0000 (+0800)
Subject: Image viewer :)
X-Git-Tag: rel0.10~106
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=f8d30e2b8d2263bb2055cc81f4bd454f7207df9b;p=tpg%2Facess2.git

Image viewer :)
---

diff --git a/Usermode/Applications/imageview_src/Makefile b/Usermode/Applications/imageview_src/Makefile
new file mode 100644
index 00000000..f3abb88e
--- /dev/null
+++ b/Usermode/Applications/imageview_src/Makefile
@@ -0,0 +1,11 @@
+# Project: imageview
+
+-include ../Makefile.cfg
+
+LDFLAGS += -luri
+
+OBJ := main.o
+BIN := imageview
+
+-include ../Makefile.tpl
+
diff --git a/Usermode/Applications/imageview_src/main.c b/Usermode/Applications/imageview_src/main.c
new file mode 100644
index 00000000..a9980619
--- /dev/null
+++ b/Usermode/Applications/imageview_src/main.c
@@ -0,0 +1,195 @@
+/*
+ * Acess2 Image Viewer
+ * By John Hodge (thePowersGang)
+ */
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <acess/sys.h>
+#include <uri.h>
+
+// === PROTOTYPES ===
+ int	main(int argc, char *argv[]);
+void	*SIF_Load(tURIFile *FP, int *Width, int *Height, uint32_t Magic);
+
+// === CONSTANTS ===
+const struct {
+	const char	*Name;
+	uint32_t	Mask;
+	uint32_t	Ident;
+	void	*(*Load)(tURIFile *FP, int *Width, int *Height, uint32_t Magic);
+}	caFileTypes[] = {
+	{"SIF", 0xFFFF, 0x51F0, SIF_Load}
+	};
+#define NUM_FILE_TYPES	(sizeof(caFileTypes)/sizeof(caFileTypes[0]))
+
+// === CODE ===
+int main(int argc, char *argv[])
+{
+	char	*imageURI;
+	tURI	*uri;
+	tURIFile	*fp;
+	uint32_t	idDWord = 0;
+	 int	i;
+	uint32_t	*buffer;
+	 int	w, h;
+	 int	termW, termH;
+	 int	tmp;
+	
+	// --- Parse Arguments
+	if( argc < 2 ) {
+		fprintf(stderr, "Usage: %s <image>\n", argv[0]);
+		return 0;
+	}
+	imageURI = argv[1];
+	
+	// --- Open File
+	uri = URI_Parse(imageURI);
+	printf("uri = {Proto:'%s',Host:'%s',Port:%i('%s'),Path:'%s'}\n",
+		uri->Proto, uri->Host, uri->PortNum, uri->PortStr, uri->Path);
+	fp = URI_Open(URI_MODE_READ, uri);
+	printf("fp = %p\n", fp);
+	if(!fp) {
+		fprintf(stderr, "ERROR: Unable to open '%s'\nFile unable to open\n", imageURI);
+		return -1;
+	}
+	free(uri);
+	
+	
+	// --- Determine file type
+	i = URI_Read(fp, 4, &idDWord);
+	printf("i = %i\n", i);
+	printf("idDWord = 0x%08lx\n", idDWord);
+	for( i = 0; i < NUM_FILE_TYPES; i++ )
+	{
+		if( (idDWord & caFileTypes[i].Mask) == caFileTypes[i].Ident )
+			break;
+	}
+	if( i == NUM_FILE_TYPES ) {
+		fprintf(stderr, "ERROR: Unable to open '%s'\nUnknown file type\n", imageURI);
+		return -2;
+	}
+	
+	// --- Load
+	buffer = caFileTypes[i].Load(fp, &w, &h, idDWord);
+	if( !buffer ) {
+		fprintf(stderr, "ERROR: Unable to open '%s'\nParsing failed\n", imageURI);
+		return -3;
+	}
+	
+	printf("w=%i,h=%i\n", w, h);
+	
+	// --- Display
+	termW = ioctl(1, 5, NULL);	termW *= 8;	ioctl(1, 5, &termW);
+	termH = ioctl(1, 6, NULL);	termH *= 16;	ioctl(1, 6, &termH);
+	//printf("termW = %i, termH = %i\n", termW, termH);
+	tmp = 1;	ioctl(1, 4, &tmp);
+	
+	seek(1, 0, SEEK_SET);
+	for( i = 0; i < (h < termH ? h : termH); i++ )
+	{
+		write(1, (w < termW ? w : termW) * 4, buffer + i*w);
+		if(w < termW)
+			seek(1, (termW-w)*4, SEEK_CUR);
+	}
+	
+	for( ;; );
+	
+	return 0;
+}
+
+// === Simple Image Format Loader ===
+void *SIF_Load(tURIFile *FP, int *Width, int *Height, uint32_t Magic)
+{
+	uint16_t	flags = Magic >> 16;
+	uint16_t	w, h;
+	 int	comp = flags & 3;
+	 int	ofs, i;
+	uint32_t	*ret;
+	
+	// First 4 bytes were read by main()
+	URI_Read(FP, 2, &w);
+	URI_Read(FP, 2, &h);
+	
+	ret = malloc(w * h * 4);
+	
+	switch(comp)
+	{
+	// Uncompressed 32-bpp data
+	case 0:
+		URI_Read( FP, w * h * 4, ret );
+		*Width = w;
+		*Height = h;
+		return ret;
+	
+	// 1.7.32 RLE
+	// (1 Flag, 7-bit size, 32-bit value)
+	case 1:
+		ofs = 0;
+		while( ofs < w*h )
+		{
+			uint8_t	len;
+			uint32_t	val;
+			URI_Read(FP, 1, &len);
+			if(len & 0x80) {
+				len &= 0x7F;
+				URI_Read(FP, len, ret+ofs);
+				ofs += len;
+			}
+			else {
+				URI_Read(FP, 4, &val);
+				while(len--)	ret[ofs++] = val;
+			}
+		}
+		return ret;
+	
+	case 3:
+		// Alpha
+		ofs = 0;
+		while( ofs < w*h )
+		{
+			uint8_t	len, val;
+			URI_Read(FP, 1, &len);
+			if(len & 0x80) {
+				len &= 0x7F;
+				while(len--) {
+					URI_Read(FP, 1, &val);
+					ret[ofs++] = (uint32_t)val << 24;
+				}
+			}
+			else {
+				URI_Read(FP, 1, &val);
+				while(len--)
+					ret[ofs++] = (uint32_t)val << 24;
+			}
+		}
+		// Red, Green, Blue
+		for( i = 0; i < 4; i++ )
+		{
+			ofs = 0;
+			while( ofs < w*h )
+			{
+				uint8_t	len, val;
+				URI_Read(FP, 1, &len);
+				if(len & 0x80) {
+					len &= 0x7F;
+					while(len--) {
+						URI_Read(FP, 1, &val);
+						ret[ofs++] |= (uint32_t)val << (24-i*8);
+					}
+				}
+				else {
+					URI_Read(FP, 1, &val);
+					while(len--)
+						ret[ofs++] |= (uint32_t)val << (24-i*8);
+				}
+			}
+		}
+		return ret;
+	
+	default:
+		fprintf(stderr, "Warning: Unknown compression scheme %i for SIF\n", comp);
+		return NULL;
+	}
+	
+}