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-rw-r--r--userland/libppm/.gitignore1
-rw-r--r--userland/libppm/Makefile15
-rw-r--r--userland/libppm/file.ppm7
-rw-r--r--userland/libppm/ppm.c199
4 files changed, 222 insertions, 0 deletions
diff --git a/userland/libppm/.gitignore b/userland/libppm/.gitignore
new file mode 100644
index 0000000..2f046a8
--- /dev/null
+++ b/userland/libppm/.gitignore
@@ -0,0 +1 @@
+ppm
diff --git a/userland/libppm/Makefile b/userland/libppm/Makefile
new file mode 100644
index 0000000..405e1dd
--- /dev/null
+++ b/userland/libppm/Makefile
@@ -0,0 +1,15 @@
+CC="i686-sb-gcc"
+CFLAGS = -ggdb -O3 -Wall -Wextra -pedantic
+LIB=-L../libgui -lgui
+INC=-I../libgui/
+BINS=ppm
+all: $(BINS)
+
+ppm.o: ppm.c
+ $(CC) $(CFLAGS) $(INC) $(LIB) -o $@ -c $<
+
+ppm: ppm.o
+ $(CC) $(CFLAGS) -o $@ $^ $(LIB)
+
+clean:
+ rm $(BINS) *.o
diff --git a/userland/libppm/file.ppm b/userland/libppm/file.ppm
new file mode 100644
index 0000000..2925e2e
--- /dev/null
+++ b/userland/libppm/file.ppm
@@ -0,0 +1,7 @@
+P3
+4 4
+15
+ 0 0 0 0 0 0 0 0 0 15 0 15
+ 0 0 0 0 15 7 0 0 0 0 0 0
+ 0 0 0 0 0 0 0 15 7 0 0 0
+15 0 15 0 0 0 0 0 0 0 0 0
diff --git a/userland/libppm/ppm.c b/userland/libppm/ppm.c
new file mode 100644
index 0000000..030c68d
--- /dev/null
+++ b/userland/libppm/ppm.c
@@ -0,0 +1,199 @@
+// Very unfinished application that can view images and set the
+// wallpaper. It only supports ppm3 and ppm6 files.
+#include <assert.h>
+#include <fcntl.h>
+#include <libgui.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+GUI_Window *global_w;
+
+struct PPM_IMAGE {
+ uint8_t version;
+ uint32_t width;
+ uint32_t height;
+ uint32_t maxval;
+ long file_location;
+};
+
+int parse_ppm_header(FILE *fp, struct PPM_IMAGE *img) {
+ char magic[3];
+ int width;
+ int height;
+ int maxval;
+ // TODO: Use %2s when scanf supports that
+ char c1;
+ char c2;
+ fscanf(fp, "%c%c\n%d %d\n%d", &c1, &c2, &width, &height, &maxval);
+ if ('P' != c1)
+ return 0;
+ if (!isdigit(c2))
+ return 0;
+ img->version = c2 - '0';
+ if (3 != img->version && 6 != img->version)
+ return 0;
+ if (maxval > 255) {
+ printf("maxval is: %d\n", maxval);
+ return 0;
+ }
+ img->width = width;
+ img->height = height;
+ img->maxval = maxval;
+ img->file_location = ftell(fp);
+ printf("width: %d\n", img->width);
+ printf("height: %d\n", img->height);
+ return 1;
+}
+
+inline uint32_t low_32_reverse(uint32_t _value) {
+ return (((_value & 0x000000FF) << 24) | ((_value & 0x0000FF00) << 8) |
+ ((_value & 0x00FF0000) >> 8));
+}
+
+int load_ppm6_file(FILE *fp, const struct PPM_IMAGE *img, uint32_t buf_width,
+ uint32_t buf_height, uint32_t *buffer) {
+ fseek(fp, img->file_location, SEEK_SET);
+ const uint8_t modifier = 255 / img->maxval;
+ int cx = 0;
+ int cy = 0;
+ const int n_pixels = img->width * img->height;
+ printf("malloc\n");
+ uint8_t *rgb = malloc(3 * n_pixels);
+ printf("end malloc\n");
+
+ printf("fread");
+ int rc = fread(rgb, 3, n_pixels, fp);
+ if (0 == rc)
+ return 0;
+ printf("end fread");
+
+ uint32_t *p = rgb;
+ if (1 == modifier) {
+ for (; rc--; p = ((uint8_t *)p) + 3) {
+ uint32_t v = *p;
+ buffer[cy * buf_width + cx] =
+ ((v & 0xFF) << 16) | ((v & 0xFF00)) | ((v & 0xFF0000) >> 16);
+ cx++;
+ if (cx == img->width) {
+ cx = 0;
+ cy++;
+ continue;
+ }
+ }
+ } else {
+ for (; rc--; p = ((uint8_t *)p) + 3) {
+ ((uint8_t *)p)[0] *= modifier;
+ ((uint8_t *)p)[1] *= modifier;
+ ((uint8_t *)p)[2] *= modifier;
+ uint32_t v = *p;
+ buffer[cy * buf_width + cx] =
+ ((v & 0xFF) << 16) | ((v & 0xFF00)) | ((v & 0xFF0000) >> 16);
+ cx++;
+ if (cx == img->width) {
+ cx = 0;
+ cy++;
+ continue;
+ }
+ }
+ }
+ return 1;
+}
+
+int load_ppm3_file(FILE *fp, const struct PPM_IMAGE *img, uint32_t buf_width,
+ uint32_t buf_height, uint32_t *buffer) {
+ fseek(fp, img->file_location, SEEK_SET);
+ uint8_t modifier = 255 / img->maxval;
+ int cx = 0;
+ int cy = 0;
+ for (int i = 0; i < img->width * img->height; i++) {
+ int red;
+ int green;
+ int blue;
+ int rc = fscanf(fp, "%d %d %d", &red, &green, &blue);
+ if (0 == rc)
+ break;
+ red &= 0xFF;
+ green &= 0xFF;
+ blue &= 0xFF;
+ red *= modifier;
+ green *= modifier;
+ blue *= modifier;
+ if (3 != rc) {
+ printf("not 3: %d\n", rc);
+ return 0;
+ }
+ buffer[cy * buf_width + cx] =
+ (red << 8 * 2) | (green << 8 * 1) | (blue << 8 * 0);
+ cx++;
+ if (cx == img->width) {
+ cx = 0;
+ cy++;
+ continue;
+ }
+ }
+ return 1;
+}
+
+int load_ppm_file(FILE *fp, const struct PPM_IMAGE *img, uint32_t buf_width,
+ uint32_t buf_height, uint32_t *buffer) {
+ if (3 == img->version)
+ return load_ppm3_file(fp, img, buf_width, buf_height, buffer);
+ else if (6 == img->version)
+ return load_ppm6_file(fp, img, buf_width, buf_height, buffer);
+ return 0;
+}
+
+struct DISPLAY_INFO {
+ uint32_t width;
+ uint32_t height;
+ uint8_t bpp;
+};
+
+int main(int argc, char **argv) {
+ if (argc < 2) {
+ printf("provide command line arguments dumbass\n");
+ return 1;
+ }
+ argv++;
+
+ int set_wallpaper = 0;
+ // Parse commandline arguments(shitty)
+ if (0 == strcmp(*argv, "-w")) {
+ set_wallpaper = 1;
+ argv++;
+ }
+
+ const char *file = *argv;
+
+ struct PPM_IMAGE img;
+ FILE *fp = fopen(file, "rb");
+ assert(fp);
+ assert(parse_ppm_header(fp, &img));
+
+ if (!set_wallpaper) {
+ global_w = GUI_CreateWindow(80, 80, img.width, img.height);
+ assert(global_w);
+ assert(
+ load_ppm_file(fp, &img, img.width, img.height, global_w->bitmap_ptr));
+ GUI_UpdateWindow(global_w);
+ fclose(fp);
+ GUI_EventLoop(global_w, NULL);
+ } else {
+ int wallpaper_fd = shm_open("wallpaper", O_RDWR, 0);
+ assert(wallpaper_fd >= 0);
+
+ struct DISPLAY_INFO inf;
+ int fd = open("/dev/display_info", O_READ, 0);
+ assert(fd >= 0);
+ assert(sizeof(inf) == read(fd, &inf, sizeof(inf)));
+
+ void *rc = mmap(NULL, inf.width * inf.height * sizeof(uint32_t), 0, 0,
+ wallpaper_fd, 0);
+ assert(rc);
+ assert(load_ppm_file(fp, &img, inf.width, inf.height, rc));
+ close(fd);
+ }
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-31 07:30:57 +0000