struggling with scheduler and userprog to view ppm files

1 files changed, 21 insertions, 0 deletions

diff --git a/userspace/put_pixel.h b/userspace/put_pixel.h
new file mode 100644
index 0000000..f4b9332
--- /dev/null
+++ b/userspace/put_pixel.h
@@ -0,0 +1,21 @@
+#include <stdint.h>
+
+#define VESA_FRAMEBUFFER 0xf6000000
+#define VESA_PITCH 2560
+#define VESA_BPP 32
+
+// TODO: what will happen in 24bit mode?
+static void put_pixel(int x,int y, int color)
+{
+    //do not write memory outside the screen buffer, check parameters against the VBE mode info
+//    if (x<0 || x>vesaXres|| y<0 || y>vesaYres) return;
+    if (x) x = (x*(VESA_BPP>>3)); // get bytes (divide by 8)
+    if (y) y = (y*VESA_PITCH);
+    //uint8_t *cTemp=VbeModeInfoBlock->physbase;
+    uint8_t *cTemp=VESA_FRAMEBUFFER;
+
+    cTemp[x+y] =  (uint8_t)(color & 0xff);
+    cTemp[x+y+1] = (uint8_t)((color>>8) & 0xff);
+    cTemp[x+y+2] = (uint8_t)((color>>16) & 0xff);
+}
+