void drawLine4(int r0, int c0, int r1, int c1, u16 color) {
#ifdef _DEBUG
/*
fprintf(debug, "drawLine(r0=//d, c0=//d, r1=//d, c1=//d, color=//X)\n",
r0, c0, r1, c1, color);
fflush(debug);
*/
#endif
int w = c1 - c0;
int h = r1 - r0;
double ratio;
int c, r;
int upright = 1;
if(fabs(h) > fabs(w)) {
upright = 0;
swap(&r0, &c0);
swap(&r1, &c1);
swap(&w, &h);
}
if( c0 > c1 ) {
swap(&r0, &r1);
swap(&c0, &c1);
}
ratio = ((double) h) / w;
for(c = c0; c < c1; c++) {
r = r0 + (c-c0) * ratio;
if(upright) setPixel4(r, c, color);
else setPixel4(c, r, color);
}
}
void drawRect4(int row, int col, int height, int width, unsigned char colorIndex)
{
unsigned short pixels = colorIndex << 8 | colorIndex;
int r;
for(r = 0; r < height; r++)
{
if(col % 2 == 0) // even starting col
{
DMANow(3, &pixels, &videoBuffer[OFFSET(row + r, col/2, SCREENWIDTH/2)], (width/2) | DMA_SOURCE_FIXED);
if(width % 2 == 1) // if width is odd
{
setPixel4(row+r, col+width - 1, colorIndex);
}
}
else // old starting col
{
setPixel4(row+r, col, colorIndex);
if(width % 2 == 1) // if width is odd
{
DMANow(3, &pixels, &videoBuffer[OFFSET(row + r, (col+1)/2, SCREENWIDTH/2)], (width/2) | DMA_SOURCE_FIXED);
}
else // width is even
{
DMANow(3, &pixels, &videoBuffer[OFFSET(row + r, (col+1)/2, SCREENWIDTH/2)], ((width/2)-1) | DMA_SOURCE_FIXED);
setPixel4(row+r, col+width - 1, colorIndex);
}
}
}
}
void DMALine(int r, int c, int w, byte clr) {
#ifndef _DEBUG
volatile u16 color = clr << 8 | clr;
if(r >= 0 && r < SCREEN_HEIGHT) {
if(c < 0) {
w += c;
c = 0;
}
if((c+w) >= SCREEN_WIDTH) {
w -= SCREEN_WIDTH - (w + c);
}
if(w > 0 && c & 1) {
setPixel4(r, c++, clr);
w--;
}
if(w > 0 && w & 1)
setPixel4(r, (c+ (w--) -1), clr);
if(w > 0) {
DMA_MEMFILL3_SHRT(videoBuffer + OFFSET(r, c)/2,
&color,
w/2);
}
}
#else
fprintf(debug,"DMALine(%d, %d, %d, %d)\n",
r, c, w, clr);
#endif
}
void drawHollowRect4(int row, int col, int height, int width, u8 index)
{
int c, r;
for(c=0; c<width; c++)
{
setPixel4(row, col+c, index);
setPixel4(row+height, col+c, index);
}
for(r=0; r<height; r++)
{
setPixel4(row+r, col, index);
setPixel4(row+r, col+width, index);
}
}
void
drawX4(int r, int c, u8 palette)
{
setPixel4(r-2,c-2,palette);
setPixel4(r+2,c-2,palette);
setPixel4(r-2,c+2,palette);
setPixel4(r+2,c+2,palette);
setPixel4(r-1,c-1,palette);
setPixel4(r+1,c-1,palette);
setPixel4(r-1,c+1,palette);
setPixel4(r+1,c+1,palette);
}
void drawRect(u16 row, u16 col, u16 height, u16 width, u8 index)
{
u16 r,c;
for(r=0; r<height; r++)
{
for(c=0; c<width; c++)
{
setPixel4(row+r, col+c, index);
}
}
}
void drawChar(int row, int col, char ch, unsigned short color)
{
for(int r=0; r<8; r++)
{
for(int c=0; c<6; c++)
{
if(fontdata_6x8[OFFSET(r,c,6) + ch*48])
{
setPixel4(row+r, col+c, color);
}
}
}
}
void drawChar4(int row, int col, char ch, u8 index)
{
int r,c;
for(r=0; r<8; r++)
{
for(c=0; c<6; c++)
{
if(fontdata_6x8[(r*6+c)+(48*ch)] == 1)
{
setPixel4(row+r, col+c, index);
}
}
}
}
void drawChar4(int row, int col, char ch, unsigned char colorIndex)
{
// COMPLETE THIS FUNCTION ! ! !
int r, c;
for(r=0; r<8; r++)
{
for(c=0; c<6; c++)
{
if(fontdata_6x8[ch*6*8+r*6+c])
{
setPixel4(row+r, col+c, colorIndex);
}
}
}
}
void drawChar4(int row, int col, char ch, unsigned char index)
{
int r,c;
for(r=0; r<8; r++)
{
for(c=0; c< 6; c++)
{
if(fontdata_6x8[OFFSET(r, c, 6)+48*ch])
{
setPixel4(r+row, c+col, index);
}
}
}
}
void drawChar4(int row, int col, char ch, volatile unsigned char colorIndex)
{
// TODO implement this function
volatile unsigned short pixels = colorIndex << 8 | colorIndex;
row = row & (~1);
col = col & (~1);
int r, c;
for(r=0; r<8; r++)
{
for(c=0; c<6; c++)
{
if(fontdata_6x8[ch*6*8+r*6+c])
{
setPixel4(row+r, col+c, pixels);
}
}
}
}
void drawLineMode4(int row, int col, int width, int index) {
int c;
for(c = 0; c < width; c++) {
setPixel4 ( row, c + col, index);
}
}
void plot4points4(int cy, int cx, int y, int x, u16 color) {
setPixel4(cx + x, cy + y, color);
if (x != 0) setPixel4(cx - x, cy + y, color);
if (y != 0) setPixel4(cx + x, cy - y, color);
if (x != 0 && y != 0) setPixel4(cx - x, cy - y, color);
}