kolibrios/programs/cmm/lib/draw_buf.h

#ifndef INCLUDE_DRAW_BUF_H
#define INCLUDE_DRAW_BUF_H
#print "[include <draw_buf.h>]\n"

#ifndef INCLUDE_KOLIBRI_H
#include "../lib/kolibri.h"
#endif

unsigned buf_data;


struct DrawBufer {
	unsigned bufx, bufy, bufw, bufh;
	byte zoom;

	bool Init();
	void Show();
	void Fill();
	void Skew();
	void DrawBar();
	void PutPixel();
	void AlignCenter();
	void AlignRight();
};

bool DrawBufer::Init(int i_bufx, i_bufy, i_bufw, i_bufh)
{
	dword alloc_size, free_ram_size;
	char error_str[256];
	if (!zoom) zoom = 1;
	bufx = i_bufx;
	bufy = i_bufy;
	bufw = i_bufw * zoom; 
	bufh = i_bufh * zoom;
	free(buf_data);
	$mov eax, 18
	$mov ebx, 16
	$int 0x40
	free_ram_size = EAX * 1024;
	alloc_size = bufw * bufh * 4 + 8;
	if (alloc_size >= free_ram_size) {
		sprintf(#error_str,
"'DrawBufer needs more memory than currenly available.
Application could be unstable.

Requested size: %i Kb
Free RAM: %i Kb' -E", alloc_size/1024, free_ram_size/1024);
		notify(#error_str);
	}
	buf_data = malloc(alloc_size);
	//debugval("buf_data",buf_data);
	if (!buf_data) return false;
	ESDWORD[buf_data] = bufw;
	ESDWORD[buf_data+4] = bufh;
	return true;
}

void DrawBufer::Fill(unsigned fill_color)
{
	unsigned i;
	unsigned max_i = bufw * bufh * 4 + buf_data + 8;
	for (i=buf_data+8; i<max_i; i+=4) ESDWORD[i] = fill_color;
}

void DrawBufer::DrawBar(unsigned x, y, w, h, color)
{
	int i, j;
	for (j=0; j<h; j++)
	{
		for (i = y+j*bufw+x*4+8+buf_data; i<y+j*bufw+x+w*4+8+buf_data; i+=4) ESDWORD[i] = color;
	}
}

void DrawBufer::PutPixel(unsigned x, y, color)
{
	int pos = y*bufw+x*4+8+buf_data;
	ESDWORD[pos] = color;
}

char shift[]={8,8,4,4};
void DrawBufer::Skew(unsigned x, y, w, h)
{
	int i, j;
	for (j=0; j<=3; j++)
	{
		for (i = y+j*bufw+x+w+h*4; i>y+j*bufw+x+h-12*4 ; i-=4)
								ESDWORD[buf_data+i+8] = ESDWORD[-shift[j]+buf_data+i+8];
	}
}

void DrawBufer::AlignRight(unsigned x,y,w,h, content_width)
{
	int i, j, l;
	int content_left = w - content_width / 2;
	for (j=0; j<h; j++)
	{
		for (i=j*w+w-x*4, l=j*w+content_width+x*4; (i>=j*w+content_left*4) && (l>=j*w*4); i-=4, l-=4)
		{
			ESDWORD[buf_data+8+i] >< ESDWORD[buf_data+8+l];
		}
	}
}

void DrawBufer::AlignCenter(unsigned x,y,w,h, content_width)
{
	int i, j, l;
	int content_left = w - content_width / 2;
	for (j=0; j<h; j++)
	{
		for (i=j*w+content_width+content_left*4, l=j*w+content_width+x*4; (i>=j*w+content_left*4) && (l>=j*w*4); i-=4, l-=4)
		{
			ESDWORD[buf_data+8+i] >< ESDWORD[buf_data+8+l];
		}
	}
}

/*
void DrawBufer::Zoom2x()
{
	int i, s;
	unsigned point_x, max_i, zline_w, s_inc;

	point_x = 0;
	max_i = bufw * bufh * 4 + buf_data+8;
	s_inc = zoom * 4;
	zline_w = zbufw * 4;

	for (i=buf_data+8, s=zbuf_data+8; i<max_i; i+=4, s+= s_inc) {
		ESDWORD[s] = ESDWORD[i];
		ESDWORD[s+4] = ESDWORD[i];
		ESDWORD[s+zline_w] = ESDWORD[i];
		ESDWORD[s+zline_w+4] = ESDWORD[i];
		if (zoom==3)
		{
			ESDWORD[s+8] = ESDWORD[i];
			ESDWORD[zline_w+s+8] = ESDWORD[i];
			ESDWORD[zline_w*2+s] = ESDWORD[i];
			ESDWORD[zline_w*2+s+4] = ESDWORD[i];
			ESDWORD[zline_w*2+s+8] = ESDWORD[i];
		}

		point_x++;
		if (point_x >= bufw) 
		{
			s += zoom - 1 * zline_w;
			point_x = 0;
		}
	}
}
*/


void DrawBufer::Show()
{
	PutPaletteImage(buf_data+8, bufw, bufh, bufx, bufy, 32, 0);	
}

#endif