From: Robin Krens <robin@robinkrens.nl>
Date: Sun, 12 Jun 2022 13:41:35 +0000 (+0200)
Subject: tools: bmp2tiles init
X-Git-Url: https://robinkrens.nl/gitweb/?p=swan-dev;a=commitdiff_plain;h=e5de2e9ca1eb79d90e6bc662e49a6c23cbf62f40

tools: bmp2tiles init
---

diff --git a/tools/Makefile b/tools/Makefile
deleted file mode 100644
index 2d1a03a..0000000
--- a/tools/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-all:
-	cc -O2 romheader.c -o romheader
-
-clean:
-	rm romheader
diff --git a/tools/bmp2tiles/Makefile b/tools/bmp2tiles/Makefile
new file mode 100644
index 0000000..1f710ba
--- /dev/null
+++ b/tools/bmp2tiles/Makefile
@@ -0,0 +1,5 @@
+all:
+	cc -O2 bmp2tiles.c -o bmp2tiles -lSDL2
+
+clean:
+	rm bmp2tiles
diff --git a/tools/bmp2tiles/bmp2tiles.c b/tools/bmp2tiles/bmp2tiles.c
new file mode 100644
index 0000000..42a8805
--- /dev/null
+++ b/tools/bmp2tiles/bmp2tiles.c
@@ -0,0 +1,85 @@
+/**
+ * File              : bmp2tiles.c
+ * Author            : Robin Krens <robin@robinkrens.nl>
+ * Date              : 04.06.2022
+ * Last Modified Date: 12.06.2022
+ * Last Modified By  : Robin Krens <robin@robinkrens.nl>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <SDL2/SDL_image.h>
+
+#define TILE_SZ		32
+#define FOURBBP_ROW	8
+#define FOURBPP_COL	8
+
+void bmp_info(SDL_Surface * img)
+{
+	SDL_PixelFormat * fmt;
+	fmt = img->format;
+	fprintf(stdout,"WIDTH: %d, HEIGHT: %d, BPP: %d\n", img->w, img->h, fmt->BitsPerPixel);
+}
+
+
+void generate_4bpp_tile_planar(unsigned char *buf, void * userdata, int sz)
+{
+	unsigned char * ptr = (unsigned char *) userdata;
+	for (int i = 0; i < 32; i+=4) {
+		/* fprintf(stdout, "userdata: pos: %d - %d\n", i, *ptr++); */
+		for (int j = 0; j < 4; ++j) {
+			for (int x = 0; x < 8; ++x) {
+				buf[i + j] = ptr[x] << j; 
+			}
+			/* printf("%d: %x\n", i+j, buf[i+j]); */
+		}
+		ptr += 8;
+	}
+}
+
+void generate_4bpp_tile_packed(unsigned char *buf, void * userdata, int sz)
+{
+	unsigned char * ptr = (unsigned char *) userdata;
+	for (int i = 0; i < 32; i+=4) {
+		for (int j = 0; j < 4; ++j) {
+			buf[i+j] = ptr[0] << 4;
+			buf[i+j] |= ptr[1];
+			ptr += 2;
+			printf("%d: %x\n", i+j, buf[i+j]);
+		}
+	}
+}
+
+int main(void)
+{
+	SDL_Surface * rawbmp;
+	SDL_PixelFormat * fmt;
+	char filename[] = "test.bmp";
+	rawbmp = SDL_LoadBMP(filename);
+	
+	if (!rawbmp) {
+		fprintf(stderr, "can not load .bmp file\n");
+		exit(EXIT_FAILURE);
+	}
+
+	bmp_info(rawbmp);
+
+	SDL_LockSurface(rawbmp);
+	rawbmp->userdata = rawbmp->pixels;
+	SDL_UnlockSurface(rawbmp);
+
+	unsigned char *tile_buf = malloc(sizeof(unsigned char) * TILE_SZ);
+
+	generate_4bpp_tile_packed(tile_buf, rawbmp->userdata, 64);
+	
+	/* if (rawbmp->format->BitsPerPixel != 24) {
+		fprintf(stderr, "format %d not supported\n", rawbmp->format->BitsPerPixel);
+		exit(EXIT_FAILURE);
+	} */
+
+
+	SDL_FreeSurface(rawbmp);
+
+}
diff --git a/tools/romheader.c b/tools/romheader.c
deleted file mode 100644
index 0b23559..0000000
--- a/tools/romheader.c
+++ /dev/null
@@ -1,83 +0,0 @@
-/**
- * File              : romheader.c
- * Author            : Robin Krens <robin@robinkrens.nl>
- * Date              : 04.06.2022
- * Last Modified Date: 04.06.2022
- * Last Modified By  : Robin Krens <robin@robinkrens.nl>
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <string.h>
-
-#define VERBOSE		1
-#define SEGMENT_SIZE	0x10000
-
-/* simple tool to pad 0xFF and to add ROM header
- * romheader structure is as follows: */
-
-struct __attribute__((__packed__)) rom_header {
-	uint8_t jmpf;
-	uint16_t label;
-	uint16_t segment;
-	uint8_t padding;
-	uint8_t dev_id;
-	uint8_t ws_type;
-	uint8_t cart_nr;
-	uint8_t padding2;
-	uint8_t romsize;
-	uint8_t ramsize;
-	uint8_t wsspec;
-	uint8_t padding3;
-	uint16_t checksum;
-};
-
-static struct rom_header header = {
-	.jmpf = 0xEA,
-	.label = 0x0,
-	.segment = 0xF000,
-	.dev_id = 0x42,
-	.ws_type = 0x01,
-	.cart_nr = 0x01,
-	.romsize = 0x03,
-	.ramsize = 0x00,
-	.wsspec = 0x04,
-	.checksum = 0x0000
-};
-
-
-int main(void)
-{
-	FILE *fp;
-	/* open for appending, so seek postion is at end */
-	fp = fopen("test.wsc", "a");
-	if (fp == NULL) {
-		perror("can not open file");
-		exit(EXIT_FAILURE);
-	}
-
-	unsigned pos = ftell(fp);
-	int gap = (SEGMENT_SIZE - pos) - sizeof(struct rom_header);
-	if (gap <= 0)
-		goto cleanup;
-
-	char dummy[SEGMENT_SIZE + 1];
-	memset(dummy, 0xFF, SEGMENT_SIZE);
-
-	unsigned wc = fwrite(dummy, sizeof(char), gap, fp);
-	wc += fwrite(&header, sizeof(char), sizeof(struct rom_header), fp);
-	
-	if (VERBOSE) {
-		printf("size of struct: %ld\n", sizeof(struct rom_header));
-		printf("pos: %d, gap to fill: %d\n", pos, gap);
-		printf("written %d\n", wc);
-	}
-
-cleanup:
-
-	printf("done\n");
-	fflush(fp);
-	fclose(fp);
-}
-