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#include "compositor.h"
#include "kernel.h"
#include "kmalloc.h"
#include "log.h"
#include "vmem.h"
#include "asm_x86.h"
#include "mount.h"
#include "fd.h"
#include "lib/string/string.h"
static uint32_t backbuffer[VESA_MAX_WIDTH*VESA_MAX_HEIGHT];
static uint32_t bgimage[VESA_MAX_WIDTH*VESA_MAX_HEIGHT];
static uint32_t *vmem=VMEM_FRAMEBUFFER;
struct window
{
uint16_t posx;
uint16_t posy;
uint16_t width;
uint16_t height;
uint32_t color;
uint16_t active;
struct pdirectory *vmem;
};
static uint16_t next_window=0;
static uint16_t next_x=50;
static uint16_t next_y=50;
#define MAX_WINDOWS 100
struct window windows[MAX_WINDOWS];
static uint16_t vesa_width;
static uint16_t vesa_height;
static uint16_t vesa_pitch;
static uint16_t mouse_x=100;
static uint16_t mouse_y=100;
static uint16_t mouse_k;
static void put_pixel(int x,int y, uint32_t color)
{
vmem[y*vesa_width+x]=color;
}
static void put_rect(struct window *win)
{
struct pdirectory* mydir=x86_get_page_directory();
if(win->vmem)
{
x86_set_page_directory(win->vmem);
}
uint32_t *user_vmem=VMEM_USER_FRAMEBUFFER;
uint32_t userx=0;
uint32_t usery=0;
for(uint16_t x=win->posx;x<win->posx+win->width;x++)
{
backbuffer[(win->posy-1)*vesa_width+x]=0xffffff;
backbuffer[(win->posy+win->height)*vesa_width+x]=0xffffff;
}
for(uint16_t x=win->posx;x<win->posx+win->width;x++)
{
usery=0;
userx++;
for(uint16_t y=win->posy;y<win->posy+win->height;y++)
{
usery++;
if(!win->active)
{
uint8_t dst_b=backbuffer[y*vesa_width+x]&0xff;
uint8_t dst_g=(backbuffer[y*vesa_width+x]&0xff00)>>8;
uint8_t dst_r=(backbuffer[y*vesa_width+x]&0xff0000)>>16;
uint8_t src_b=win->color&0xff;
uint8_t src_g=(win->color&0xff00)>>8;
uint8_t src_r=(win->color&0xff0000)>>16;
//we encoded alpha in the highest octet. 1-opaque 0-transparent
//user premultiplied alpha please!
uint16_t a=(0xff-((win->color&0xff000000)>>24));
uint8_t out_r=src_r+((a*dst_r)>>8);
uint8_t out_g=src_g+((a*dst_g)>>8);
uint8_t out_b=src_b+((a*dst_b)>>8);
if(win->vmem)
{
if(userx<640&&usery<480)backbuffer[y*vesa_width+x]=user_vmem[userx+usery*640];
}
else
{
backbuffer[y*vesa_width+x]=(out_r<<16)+(out_g<<8)+out_b;
}
}
else
{
if(win->vmem)
{
if(userx<640&&usery<480)backbuffer[y*vesa_width+x]=~(user_vmem[userx+usery*640]);
}
else
{
backbuffer[y*vesa_width+x]=0xffffff;
}
}
}
}
if(win->vmem)
{
x86_set_page_directory(mydir);
}
}
static void put_mouse()
{
if(mouse_k&1)
{
for(int i=-5;i<5;i++)
for(int j=-5;j<5;j++)
backbuffer[(mouse_y+j)*vesa_width+mouse_x+i]=0x00ff00;
}
else
{
for(int i=-5;i<5;i++)
for(int j=-5;j<5;j++)
backbuffer[(mouse_y+i)*vesa_width+mouse_x+j]=0xff0000;
}
}
void compositor_add_window(uint32_t addr)
{
if (next_window>=MAX_WINDOWS)kpanic("max number of windows reached. increase MAX_WINDOWS");
windows[next_window]=windows[0];
windows[0].posx=next_x;
windows[0].posy=next_y;
next_x+=100;
next_y+=100;
windows[0].width=640;
windows[0].height=480;
windows[0].color=0xAAAA00AA;
windows[0].active=0;
windows[0].vmem=addr;
next_window++;
}
void compositor_init(uint16_t width, uint16_t height, uint16_t pitch)
{
vesa_width=width;
vesa_height=height;
klog("initialized composing window manager to %d x %d",width,height);
}
void compositor_swap_buffers()
{
static bool first=true;
// if(!first)return;
// klog("swap");
memcpy(backbuffer,bgimage,vesa_height*vesa_width*4);// TODO optimize? rects only too?
for(int i=next_window-1;i>=0;i--)
{
put_rect(&windows[i]);
}
put_mouse();
memcpy(VMEM_FRAMEBUFFER,backbuffer,vesa_height*vesa_width*4);// TODO optimize? rects only too?
first=false;
}
void compositor_mouse_handle(uint16_t x,uint16_t y, uint8_t key)
{
static int last_mouse_x;
static int last_mouse_y;
if(!(key&1))
{
last_mouse_x=x;
last_mouse_y=y;
}
mouse_x=x;
mouse_y=y;
mouse_k=key;
int active=-1;
for(int i=0;i<MAX_WINDOWS;i++)
{
struct window *w=&windows[i];
if(active==-1&&x>w->posx&&x<w->posx+w->width&&y>w->posy&&y<w->posy+w->height)
{
if(key&1)
{
w->posx-=last_mouse_x-mouse_x;
last_mouse_x=mouse_x;
w->posy-=last_mouse_y-mouse_y;
last_mouse_y=mouse_y;
}
w->active=true;
active=i;
}
else
{
w->active=false;
}
}
if(active!=-1&&active!=0&&(key&1))
{
struct window temp;
temp=windows[active];
windows[active]=windows[0];
windows[0]=temp;
}
}
void compositor_set_background(char *ppm_raw_filename)
{
klog("loading bg...");
fd bg=mount_file_open(ppm_raw_filename);
uint32_t i=0;
for(int y=0;y<vesa_width;y++)
{
for(int x=0;x<vesa_height;x++)
{
bgimage[i]=(fd_read(&bg)<<16)+(fd_read(&bg)<<8)+fd_read(&bg);
backbuffer[i]=bgimage[i];
i++;
}
}
klog("finished");
}
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