1 files changed, 79 insertions, 0 deletions
diff --git a/boot/limine/framebuffer.c b/boot/limine/framebuffer.c
new file mode 100644
index 0000000..b4330bb
--- /dev/null
+++ b/boot/limine/framebuffer.c
@@ -0,0 +1,79 @@
+#include "arch/x86_64/hal/obj.h"
+#include "jove.h"
+#include "lib/printf.h"
+#include "limine.h"
+#include "init.h"
+#include "hal/framebuffer.h"
+
+extern struct limine_framebuffer_response *_limine_framebuffers;
+
+#define CHECK_IF_FB(obj) \
+    if(obj_gettype(obj) != JOVE_OBJ_FRAMEBUFFER) { \
+        reterr(EBADOBJ); \
+    }
+
+size_t
+fb_width(jove_owned_obj_t *obj)
+{
+    CHECK_IF_FB(obj);
+    struct limine_framebuffer *fb = obj_deref(obj);
+    return fb->width;
+}
+
+size_t
+fb_height(jove_owned_obj_t *obj)
+{
+    CHECK_IF_FB(obj);
+    struct limine_framebuffer *fb = obj_deref(obj);
+    return fb->height;
+}
+
+int
+fb_blit(jove_owned_obj_t *obj,
+        uint32_t *data,
+        size_t x, size_t y,
+        size_t width, size_t height)
+{
+    CHECK_IF_FB(obj);
+    struct limine_framebuffer *fb = obj_deref(obj);
+    
+    uint32_t *fb_address = fb->address;
+    for(size_t oline = 0; oline < height; oline++) {
+        size_t line = oline + y;
+        uint32_t *line_data = &data[oline * width];
+        for(size_t ocol = 0; ocol < width; ocol++) {
+            size_t col = ocol + x;
+            fb_address[line * (fb->pitch >> 2) + col] = line_data[ocol];
+        }
+    }
+    return 0;
+}
+
+void
+fb_init()
+{
+    if(_limine_framebuffers->framebuffer_count == 0) {
+        return;
+    }
+    struct limine_framebuffer *fb = _limine_framebuffers->framebuffers[0];
+    size_t fb_bytes = fb->width * fb->height * (fb->bpp / 8);
+    void *fb_virt = fb_remap((uintptr_t)fb->address, fb_bytes);
+    if(fb_virt == NULL) {
+        kprintf("Unable to remap framebuffer.\n");
+        return;
+    }
+
+    kprintf("framebuffer: phys address %p\n", (uintptr_t)fb->address);
+    kprintf("framebuffer: virt address %p\n", fb_virt);
+    kprintf("framebuffer: width %ipx\n", fb->width);
+    kprintf("framebuffer: height %ipx\n", fb->height);
+    kprintf("framebuffer: %i bpp\n", fb->bpp);
+
+    fb->address = fb_virt;
+    {
+        jove_owned_obj_t *fb_obj = obj_take(objdir_getlocal(_rootdir_obj, ROOTDIR_FRAMEBUFFER_I));
+        obj_settype(fb_obj, JOVE_OBJ_FRAMEBUFFER);
+        obj_setvalue(fb_obj, (uintptr_t)fb);
+        obj_release(fb_obj);
+    }
+}