From 66f2ca62469eba4b46e1f19f54dde9476b08d956 Mon Sep 17 00:00:00 2001
From: Loic Guegan <manzerbredes@mailbox.org>
Date: Fri, 30 Apr 2021 09:31:30 +0200
Subject: Debug interrupts, allow to show bmp images

---
 src/drivers/bmp.cc  | 39 +++++++++++++++++++++++++++++++++++++++
 src/drivers/bmp.hpp | 18 ++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 src/drivers/bmp.cc
 create mode 100644 src/drivers/bmp.hpp

(limited to 'src/drivers')

diff --git a/src/drivers/bmp.cc b/src/drivers/bmp.cc
new file mode 100644
index 0000000..6f9dad6
--- /dev/null
+++ b/src/drivers/bmp.cc
@@ -0,0 +1,39 @@
+#include "bmp.hpp"
+#include "libs/string.hpp"
+
+#include "drivers/framebuffer.hpp"
+
+void bmp_draw(u8* bmp_data, int posx, int posy){
+    BMP_HEADER header;
+    memcpy(bmp_data, &header, sizeof(BMP_HEADER));
+    if(header.signature!=0x4d42){
+        printk("Invalid BMP data\n");
+        return;
+    }
+
+    // Do not forget, each row is 32bits aligned
+    u32 Bpp=header.bpp/8;
+    u32 lineW=header.width*Bpp;
+    while((lineW&0x3)!=0){
+        lineW++;
+    }
+   
+    for(u32 y=0;y<header.height;y++){
+        for(u32 x=0;x<header.width;x++){
+            u32 pos=x*Bpp+y*lineW;
+            u8 *pixel=((u8*)bmp_data)+header.data_offset+pos;
+            FB_PIXEL p;
+            p.x=posx+x;
+            p.y=posy+(header.height-y);
+            p.r=pixel[0];
+            p.g=pixel[1];
+            p.b=pixel[2];
+            //printk("R%d G%d B%d\n",p.r,p.g,p.b);
+            p.a=0;
+            framebuffer_draw(p);
+            
+        }
+     
+    }
+
+}
\ No newline at end of file
diff --git a/src/drivers/bmp.hpp b/src/drivers/bmp.hpp
new file mode 100644
index 0000000..e31d4b3
--- /dev/null
+++ b/src/drivers/bmp.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#include "boucane.hpp"
+
+typedef struct {
+    u16 signature;
+    u32 filesize;
+    u32 reserved;
+    u32 data_offset;
+    u32 info_header_size;
+    u32 width;
+    u32 height;
+    u16 planes;
+    u16 bpp;
+    u32 compression;
+} __attribute__((packed)) BMP_HEADER;
+
+void bmp_draw(u8* bmp_data, int x, int y);
\ No newline at end of file
-- 
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