.gitignore

@@ -1,8 +1,4 @@
 *.cx16
 *.lbl
 *.BMX
-*.zip
-*.prg
-*.PRG
 obj/
-!dist/*.BMX

dist.mk

@@ -1,5 +0,0 @@
-.PHONY: dist
-dist: $(PROGRAM)
-	cp $(PROGRAM) dist/BMXVIEW.PRG
-	rm -f dist.zip
-	zip dist.zip $(wildcard dist/*)

dist/manifest.json

@@ -1,9 +0,0 @@
-{
-	"manifest_version": "1.0.0",
-	"name": "BMXView",
-	"author": "Catmeow72",
-	"app_version": "1.0.0",
-	"license": "MIT0",
-	"start_prg": "AUTOBOOT.X16"
-}
-

src/main.c

@@ -19,77 +19,31 @@ bool compress;
 bool direct_to_vera;
 uint16_t imgdatastart;
 uint32_t imgdatabytes;
-size_t palette_size = 0;
-size_t palette_entry_count = 0;
-size_t palette_start_byte = 0;
-size_t vera_w, vera_h;
 uint8_t pixels_per_byte;
 uint8_t borderidx = 255;
 bool over320;
 uint8_t oldhscale, oldvscale;
 uint8_t significant_palette_entries;
 uint8_t significant_palette_start;
-size_t expected_data_begin = 0;
 uint8_t *image_start = BANK_RAM;
-typedef enum {
-	LZSA2 = -1,
-	NONE = 0,
-} CompressionType;
-CompressionType compression_type = 0;
-uint32_t filepos = 0;
 /// @brief Reads a 16 bit little endian value from LFN 2
 /// @return The 16 bit value
 uint16_t read16() {
 	cbm_k_chkin(2);
-	filepos++;
-	filepos++;
 	return ((cbm_k_chrin())) | ((uint16_t)cbm_k_chrin() << 8);
 }
 /// @brief Reads an 8 bit value and returns it as a character
 /// @return The character
 char readchar() {
 	cbm_k_chkin(2);
-	filepos++;
 	return cbm_k_chrin();
 }
 /// @brief Reads an unsigned 8 bit value and returns it as is
 /// @return The unsigned 8 bit value
 uint8_t read8() {
 	cbm_k_chkin(2);
-	filepos++;
 	return cbm_k_getin();
 }
-size_t readbuf(void *ptr, size_t max, bool incr) {
-	size_t i = 0;
-	size_t read_bytes = 255;
-	// Do while loop for special case of max 0 where we read as many bytes as possible.
-	do {
-		if (max == 0) {
-			read_bytes = 0;
-		} else if (max - i > 255) {
-			read_bytes = 255;
-		} else {
-			read_bytes = max - i;
-		}
-		read_bytes = cx16_k_macptr(read_bytes, incr, ptr);
-		filepos += read_bytes;
-		i += read_bytes;
-	} while (max != 0 && i < max && read_bytes != 0);
-	return i;
-}
-void seek(uint32_t new_filepos) {
-	char buf[7];
-	buf[0] = 'p';
-	buf[1] = 2;
-	buf[2] = filepos & 0xFF;
-	buf[3] = (filepos >> 8) & 0xFF;
-	buf[4] = (filepos >> 16) & 0xFF;
-	buf[5] = (filepos >> 24) & 0xFF;
-	buf[6] = '\0';
-	filepos = new_filepos;
-	cbm_open(15, 8, 15, buf);
-	cbm_close(15);
-}
 /// @brief Checks if the header in LFN 2 is correct
 /// @return True if it is, false otherwise
 bool checkheader() {
@@ -149,6 +103,8 @@ int uploadimage(const char *filename) {
 	uint8_t *image_end = BANK_RAM;
 	// 16 bit variables
 	size_t i = 0, j = 0, x = 0, y = 0, value = 0, bitmask = 0;
+	// Variables for the VERA width and height values
+	size_t vera_w = 320, vera_h = 240;
 	// The max address of the VERA
 	uint16_t vera_max = 0;
 	// 32 bit variables, used sparingly
@@ -163,7 +119,6 @@ int uploadimage(const char *filename) {
 	uint8_t version;
 	// True if all palette entries are significant
 	bool all_significant;
-	vera_w = 320, vera_h = 240;
 	// Open the file
 	cbm_k_setnam(filename);
 	cbm_k_setlfs(2, 8, 2);
@@ -180,9 +135,6 @@ int uploadimage(const char *filename) {
 	}
 	// Read the header
 	version = read8();
-	if (version != 1) {
-		printf("Warning: Unknown version %u!\n", version);
-	}
 	bitdepth = read8();
 	// Verify the bitdepth
 	if (bitdepth == 0) {
@@ -190,14 +142,7 @@ int uploadimage(const char *filename) {
 		return 1;
 	}
 	vera_bit_depth = read8();
-	if (vera_bit_depth & 0b11 != vera_bit_depth) {
-		printf("Warning: Invalid VERA bitdepth %2x\n", vera_bit_depth);
-	}
 	vera_bit_depth &= 0b11;
-	if (1 << vera_bit_depth != bitdepth) {
-		printf("Warning: VERA bitdepth mismatch: %ubpp vs %ubpp\n", 1 << vera_bit_depth, bitdepth);
-		bitdepth = 1 << vera_bit_depth;
-	}
 	config |= vera_bit_depth;
 	// Calculate the amount of pixels that can fit in a byte, used later
 	pixels_per_byte = 8 / bitdepth;
@@ -213,59 +158,41 @@ int uploadimage(const char *filename) {
 	// Get the list of significant palette entires
 	significant_palette_entries = read8();
 	significant_palette_start = read8();
-	palette_entry_count = significant_palette_entries;
 	if (significant_palette_entries == 0) {
 		printf("All palette entries significant.\n");
 		all_significant = true;
 		significant_palette_start = 0;
-		palette_entry_count = 256;
 	} else {
 		printf("%u palette entries significant\nstarting at %u.\n", significant_palette_entries, significant_palette_start);
 	}
-	palette_size = palette_entry_count * 2;
-	palette_start_byte = ((uint16_t)significant_palette_start) * 2;
-	printf("Palette: $1f%03x -> $1f%03x (len: $%03x)\n", palette_start_byte + 0xA00, palette_start_byte + 0xA00 + palette_size, palette_size);
 	imgdatastart = read16();
-	expected_data_begin = 32 + palette_size;
-	if (imgdatastart != expected_data_begin) {
-		printf("Warning: Unsupported or corrupted image file.\n");
-		printf("Image data start was incorrect!\n");
-		printf("Expected: %u, got: %u\n", expected_data_begin, imgdatastart);
-		imgdatastart = expected_data_begin;
-	} else {
-		printf("Image data start looks good!\n");
-	}
 	printf("Image starts at 0-indexed offset %4x\n", imgdatastart);
 	direct_to_vera = width == vera_w && height == vera_h;
-	compression_type = (CompressionType)read8();
-	switch (compression_type) {
-		case LZSA2: {
-			printf("Using LZSA2 compression\n");
-		} break;
-		case NONE: {
-			printf("Using no compression\n");
-		} break;
-		default: {
-			printf("ERROR: Invalid compression type!");
-			return -1;
-		}
-	}
+	if ((int8_t)read8() == -1) {
+		compress = true;
+	};
 	// Load the border color
 	borderidx = read8();
 	printf("Skipping reserved bytes...\n");
-	while (filepos < 32) {
+	for (i = 0; i < 16; i++) {
 		read8();
 	}
 	printf("Border color: %02x\n", borderidx);
 	printf("Reading palette entries...\n");
-	for (i = 0; i < palette_size; i++) {
+	for (i = 0; i < (uint16_t)significant_palette_entries*2; i++) {
+		j = i >> 1;
 		// Only load the required palette entries
-		palette[i+(significant_palette_start*2)] = read8();
+		if (all_significant || j >= significant_palette_start && j < significant_palette_start+significant_palette_entries || j == borderidx) {
+			palette[i] = read8();
+		} else {
+			read8();
+			palette[i] = get_from_backed_up_palette(i);
+		}
 	}
 	// If the VERA was set up for a 640p image, make sure to keep track of that
 	if (over320) {
-		vera_w = 640;
-		vera_h = 480;
+		vera_w *= 2;
+		vera_h *= 2;
 	}
 	// Calculate the maximum address and bank
 	vera_max_32 = ((uint32_t)vera_w * (uint32_t)vera_h)/(uint32_t)pixels_per_byte;
@@ -277,20 +204,6 @@ int uploadimage(const char *filename) {
 	VERA.layer0.config = config;
 	// Make sure the TILEW value is set up correctly
 	VERA.layer0.tilebase = over320 ? 1 : 0;
-	if (filepos != imgdatastart) {
-		printf("WARNING: The current file position does not\ncorrespond to the image data's start!\n");
-		printf("File position: %4x\nImage data beginning: %4x\n", filepos, imgdatastart);
-		if (imgdatastart == 0) {
-			printf("Assuming imgdatastart was left uninitialized. Not seeking.");
-		} else {
-			while (filepos < imgdatastart) {
-				read8();
-			}
-			if (filepos > imgdatastart) {
-				seek(imgdatastart);
-			}
-		}
-	}
 	// Debugging
 	printf("Loading %simage bytes: $%lx\n", compress ? "compressed " : "", imgdatabytes);
 	printf("Image width: %u, image height: %u\npixels per byte: %u\n", width, height, pixels_per_byte);
@@ -309,7 +222,7 @@ int uploadimage(const char *filename) {
 	if (compress) {
 		RAM_BANK = 1;
 		do {
-			i = readbuf(image_end, 0, true);
+			i = cx16_k_macptr(0, true, image_end);
 			image_end += i;
 			if (RAM_BANK > 1) {
 				printf("Error: Cannot decompress memory because compressed data is too large.\n");
@@ -332,7 +245,7 @@ int uploadimage(const char *filename) {
 			DEBUG_PORT1 = 0;
 		} else {
 			do {
-				bytes_read = readbuf(&VERA.data0, 0, false);
+				bytes_read = cx16_k_macptr(0, false, &VERA.data0);
 			} while (bytes_read > 0);
 		}
 	} else {
@@ -346,7 +259,7 @@ int uploadimage(const char *filename) {
 			}
 			if (x < width && y < height) {
 				// Load the image's bytes, up to the bytes per row - the x value in bytes
-				bytes_read = readbuf(&VERA.data0, (((width) - x))/pixels_per_byte, false);
+				bytes_read = cx16_k_macptr((((width) - x))/pixels_per_byte, false, &VERA.data0);
 			} else {
 				// Fill the remaining pixels in the row with the border color using a fast assembly routine
 				tmp = (vera_w-x)/pixels_per_byte;
@@ -392,20 +305,13 @@ void set_text_color(uint8_t color) {
 		VERA.data0 = color;
 	}
 }
-typedef enum {
-	LayerBoth = 0b11,
-	LayerGraphics = 0b01,
-	LayerText = 0b10
-} LayerState;
 int main(int argc, char **argv) {
 	char *buf;
 	int ret;
-	bool done;
-	LayerState layers;
+	bool done, text_visible;
 	char ch;
 	uint8_t coloridx = 1;
 	size_t i;
-	bool second_row;
 	backup_palette();
 	buf = (char*)malloc(81);
 	printf("Enter viewable file name: ");
@@ -424,33 +330,20 @@ int main(int argc, char **argv) {
 	set_text_256color(true);
 	printf("Press arrow keys to change text colors.");
 	gotoxy(0, 0);
+	printf("[ESC] to exit, [SPACE] to toggle text.");
 	coloridx = significant_palette_start - 1;
 	set_text_color(coloridx);
-	second_row = vera_h <= 320;
-	if (second_row) {
-		gotoxy(0, (vera_h>>3)-2);
-		printf("[F1] Text   [F3] Both   \n[F2] Graph  [ESC] Exit  ");
-	} else {
-		gotoxy(0, (vera_h>>3)-1);
-		printf("[F1] Text   [F2] Graph  [F3] Both   [ESC] Exit  ");
-	}
 	done = false;
-	layers = LayerBoth;
+	text_visible = true;
 	while (!done) {
 		while (kbhit()) {
 			ch = cgetc();
 			if (ch == CH_ESC) {
 				done = true;
 				break;
-			} else if (ch == CH_F1) {
-				layers = LayerText;
-				vera_layer_enable(layers);
-			} else if (ch == CH_F2) {
-				layers = LayerGraphics;
-				vera_layer_enable(layers);
-			} else if (ch == CH_F3) {
-				layers = LayerBoth;
-				vera_layer_enable(layers);
+			} else if (ch == ' ') {
+				text_visible = !text_visible;
+				vera_layer_enable(0b1 | (text_visible ? 0b10 : 0));
 			} else if (ch == CH_CURS_LEFT) {
 				set_text_color(--coloridx);
 			} else if (ch == CH_CURS_RIGHT) {