Add viewing NDS file info (#102)

* Add viewing NDS file info

* Fix breaking SysNAND reads

arm9/source/file_browse.cpp

@@ -39,6 +39,7 @@
 #include "driveOperations.h"
 #include "dumpOperations.h"
 #include "hexEditor.h"
+#include "ndsInfo.h"
 #include "nitrofs.h"
 #include "inifile.h"
 #include "nds_loader_arm9.h"
@@ -225,6 +226,8 @@ FileOperation fileBrowse_A(DirEntry* entry, char path[PATH_MAX]) {
 		{
 			assignedOp[++maxCursors] = FileOperation::mountNitroFS;
 			printf("   Mount NitroFS\n");
+			assignedOp[++maxCursors] = FileOperation::ndsInfo;
+			printf("   Show NDS file info\n");
 		}
 		else if(extension(entry->name, {"sav", "sav1", "sav2", "sav3", "sav4", "sav5", "sav6", "sav7", "sav8", "sav9"}))
 		{
@@ -376,6 +379,9 @@ FileOperation fileBrowse_A(DirEntry* entry, char path[PATH_MAX]) {
 						currentDrive = 5;
 					}
 					break;
+				} case FileOperation::ndsInfo: {
+					ndsInfo(entry->name.c_str());
+					break;
 				} case FileOperation::showInfo: {
 					changeFileAttribs(entry);
 					break;

arm9/source/file_browse.h

@@ -45,6 +45,7 @@ enum class FileOperation {
 	copyFatOut,
 	calculateSHA1,
 	hexEdit,
+	ndsInfo,
 };
 
 bool extension(const std::string &filename, const std::vector<std::string> &extensions);

arm9/source/main.cpp

@@ -152,6 +152,7 @@ int main(int argc, char **argv) {
 	// Subscreen as a console
 	videoSetModeSub(MODE_0_2D);
 	vramSetBankH(VRAM_H_SUB_BG);
+	vramSetBankI(VRAM_I_SUB_SPRITE);
 	consoleInit(&bottomConsoleBG, 1, BgType_Text4bpp, BgSize_T_256x256, 7, 0, false, true);
 	consoleInit(&bottomConsole, 0, BgType_Text4bpp, BgSize_T_256x256, 15, 0, false, true);
 

arm9/source/ndsInfo.cpp

@@ -0,0 +1,134 @@
+#include "ndsInfo.h"
+
+#include "date.h"
+#include "tonccpy.h"
+
+#include <nds.h>
+#include <stdio.h>
+
+extern PrintConsole bottomConsole, bottomConsoleBG, topConsole;
+
+constexpr const char *langNames[8] {
+	"Japanese",
+	"English",
+	"French",
+	"German",
+	"Italian",
+	"Spanish",
+	"Chinese",
+	"Korean"
+};
+
+extern void reinitConsoles(void);
+
+void ndsInfo(const char *path) {
+	FILE *file = fopen(path, "rb");
+	if(!file)
+		return;
+
+	char headerTitle[0xD] = {0};
+	fread(headerTitle, 1, 0xC, file);
+
+	char tid[5] = {0};
+	fread(tid, 1, 4, file);
+
+	u32 ofs;
+	fseek(file, 0x68, SEEK_SET);
+	fread(&ofs, sizeof(u32), 1, file);
+	fseek(file, ofs, SEEK_SET);
+
+	u16 version;
+	fread(&version, sizeof(u16), 1, file);
+
+	u8 *iconBitmap = new u8[8 * 0x200];
+	u16 *iconPalette = new u16[8 * 0x10];
+	u16 *iconAnimation = new u16[0x40](); // Initialize to 0 for DS icons
+
+	if(version == 0x0103) { // DSi
+		fseek(file, 0x1240 - 2, SEEK_CUR);
+		fread(iconBitmap, 1, 8 * 0x200, file);
+		fread(iconPalette, 2, 8 * 0x10, file);
+		fread(iconAnimation, 2, 0x40, file);
+
+		fseek(file, ofs + 0x240, SEEK_SET);
+	} else { // DS
+		fseek(file, 0x20 - 2, SEEK_CUR);
+		fread(iconBitmap, 1, 0x200, file);
+		fread(iconPalette, 2, 0x10, file);
+	}
+
+	int languages = 5 + (version & 0x3);
+	char16_t *titles = new char16_t[languages * 0x80];
+	fread(titles, 2, languages * 0x80, file);
+
+	fclose(file);
+
+	oamInit(&oamSub, SpriteMapping_Bmp_1D_128, false);
+
+	u16 *iconGfx = oamAllocateGfx(&oamSub, SpriteSize_32x32, SpriteColorFormat_16Color);
+	oamSet(&oamSub, 0, 256 - 36, 4, 0, 0, SpriteSize_32x32, SpriteColorFormat_16Color, iconGfx, -1, false, false, false, false, false);
+	
+	tonccpy(iconGfx, iconBitmap, 0x200);
+	tonccpy(SPRITE_PALETTE_SUB, iconPalette, 0x20);
+
+	oamUpdate(&oamSub);
+
+	u16 pressed = 0, held = 0;
+	int animationFrame = 0, frameDelay = 0, lang = 1;
+	while(1) {
+		consoleClear();
+
+		iprintf("Header Title: %s\n", headerTitle);
+		iprintf("Title ID: %s\n", tid);
+		iprintf("Title: (%s)\n  ", langNames[lang]);
+		for(int j = 0; j < 0x80 && titles[lang * 0x80 + j]; j++) {
+			if(titles[lang * 0x80 + j] == '\n')
+				iprintf("\n  ");
+			else
+				iprintf("%c", titles[lang * 0x80 + j]);
+		}
+		iprintf("\n");
+
+		consoleSelect(&topConsole);
+		do {
+			swiWaitForVBlank();
+			scanKeys();
+			pressed = keysDown();
+			held = keysDownRepeat();
+			iprintf("\x1B[30m\x1B[0;26H %s", RetTime().c_str()); // Print time
+			if(iconAnimation[animationFrame] && animationFrame < 0x40) {
+				if(frameDelay < (iconAnimation[animationFrame] & 0xFF) - 1) {
+					frameDelay++;
+				} else {
+					frameDelay = 0;
+					if(!iconAnimation[++animationFrame])
+						animationFrame = 0;
+
+					tonccpy(iconGfx, iconBitmap + ((iconAnimation[animationFrame] >> 8) & 7) * 0x200, 0x200);
+					tonccpy(SPRITE_PALETTE_SUB, iconPalette + ((iconAnimation[animationFrame] >> 0xB) & 7) * 0x10, 0x20);
+					oamSetFlip(&oamSub, 0, iconAnimation[animationFrame] & BIT(14), iconAnimation[animationFrame] & BIT(15));
+					oamUpdate(&oamSub);
+				}
+			}
+		} while(!held);
+		consoleSelect(&bottomConsole);
+
+		if(held & KEY_UP) {
+			if(lang > 0)
+				lang--;
+		} else if(held & KEY_DOWN) {
+			if(lang < languages - 1)
+				lang++;
+		} else if(pressed & KEY_B) {
+			break;
+		}
+	}
+
+	delete[] iconBitmap;
+	delete[] iconPalette;
+	delete[] iconAnimation;
+	delete[] titles;
+
+	oamFreeGfx(&oamSub, iconGfx);
+	oamDisable(&oamSub);
+}

arm9/source/ndsInfo.h

@@ -0,0 +1,6 @@
+#ifndef NDS_INFO_H
+#define NDS_INFO_H
+
+void ndsInfo(const char *path);
+
+#endif