📄 lcd.c
字号:
*((ByteType *)currPoint) = (color & 0xff);
break;
case 16:
*((WordType *)currPoint) = (color & 0xffff);
break;
}
// Make a LINE_SIZE increment to the currPoint,
// in order to move point to the start position of next line
(ByteType *)currPoint += LINE_SIZE; }
return;}// Draw a common line on the screen
void fb_DrawLine(short x1, short y1, short x2, short y2, ColorType color/*, int xorm */){ int i = 0; int d = 0; if(abs(y2 - y1) > abs(x2 - x1)) { d = (y2 > y1) ? 1 : -1; for(i = y1; i != y2; i += d) { fb_PutPixel(x1 + (i - y1) * ( x2 - x1) / (y2 - y1), i, color); } } else { d = (x2 > x1) ? 1 : -1; for(i = x1; i != x2; i += d) { fb_PutPixel(i, y1 + (i - x1) * (y2 - y1) / (x2 - x1), color); } }}
// Draw a horizontal dashed line on the screen
void fb_DrawDashed_H(short x1, short x2, short y, short spaceWidth, ColorType color)
{
short i;
short dashCount; /* dashed width counter */
short isSpace; /* sign for put a pixel or not */
if (x1 > x2)
{
short tmp;
tmp = x1;
x1 = x2;
x2 = tmp;
}
if (spaceWidth < 0 || spaceWidth > (x2 - x1))
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: spaceWidth out of range.\n");
printf("DEBUG_INFO: spaceWidth = %d\n", spaceWidth);
#endif
spaceWidth = DEFAULT_DASH;
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Set to DEFAULT_DASH.\n");
printf("DEBUG_INFO: spaceWidth = %d\n", spaceWidth);
#endif
}
dashCount = 0;
isSpace = 0;
for (i = x1; i <= x2; i++)
{
// to put a pixel with a specified color according isSpace sign
if (!isSpace)
{
fb_PutPixel(i, y, color);
dashCount++;
}
else
dashCount++;
if (dashCount == spaceWidth)
{
dashCount = 0;
isSpace ^= 1;
}
}
return;
}
// Draw a vertical dashed line on the screen
void fb_DrawDashed_V(short x, short y1, short y2, short spaceWidth, ColorType color)
{
short i;
short dashCount; /* dashed width counter */
short isSpace; /* sign for put a pixel or not */
if (y1 > y2)
{
short tmp;
tmp = y1;
y1 = y2;
y2 = tmp;
}
if (spaceWidth < 0 || spaceWidth > (y2 - y1))
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: spaceWidth out of range.\n");
printf("DEBUG_INFO: spaceWidth = %d\n", spaceWidth);
#endif
spaceWidth = DEFAULT_DASH;
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Set to DEFAULT_DASH.\n");
printf("DEBUG_INFO: spaceWidth = %d\n", spaceWidth);
#endif
}
dashCount = 0;
isSpace = 0;
for (i = y1; i <= y2; i++)
{
// To put a pixel with a specified color according isSpace sign
if (!isSpace)
{
fb_PutPixel(x, i, color);
dashCount++;
}
else
dashCount++;
if (dashCount == spaceWidth)
{
dashCount = 0;
isSpace ^= 1;
}
}
return;
}
// Draw a rectangle frame on the screen
void fb_DrawRect(short x1, short y1, short x2, short y2, ColorType color){
// Draw horitontal frame
fb_DrawLine_H(x1, x2, y1, color);
fb_DrawLine_H(x1, x2, y2, color);
// Draw vertical frame
fb_DrawLine_V(x1, y1 + 1, y2 - 1, color);
fb_DrawLine_V(x2, y1 + 1, y2 - 1, color);
return;} // Draw a rectangle frame on the screen
void fb_FillRect(short x1, short y1, short x2, short y2, ColorType color)
{
short currLine;
unsigned long startOffset;
if (x1 < 0 || x1 >= SCREEN_WIDTH ||
x2 < 0 || x2 >= SCREEN_WIDTH ||
y1 < 0 || y1 >= SCREEN_HEIGHT ||
y2 < 0 || y2 >= SCREEN_HEIGHT)
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Pixel out of screen range.\n");
printf("DEBUG_INFO: x1 = %d, y1 = %d, x2 = %d, y2 = %d\n", x1, y1, x2, y2);
#endif
x1 = (x1 < 0) ? 0 : x1;
x2 = (x2 < 0) ? 0 : x2;
y1 = (y1 < 0) ? 0 : y1;
y2 = (y2 < 0) ? 0 : y2;
x1 = (x1 >= SCREEN_WIDTH) ? SCREEN_WIDTH - 1 : x1;
x2 = (x2 >= SCREEN_WIDTH) ? SCREEN_WIDTH - 1 : x2;
y1 = (y1 >= SCREEN_HEIGHT) ? SCREEN_HEIGHT - 1 : y1;
y2 = (y2 >= SCREEN_HEIGHT) ? SCREEN_HEIGHT - 1 : y2;
}
if (x1 > x2)
{
short tmp;
tmp = x1;
x1 = x2;
x2 = tmp;
}
if (y1 > y2)
{
short tmp;
tmp = y1;
y1 = y2;
y2 = tmp;
}
startOffset = y1 * LINE_SIZE + x1 * PIXEL_SIZE;
#ifdef DEBUG
printf("DEBUG_INFO: x1 = %d, y1 = %d, x2 = %d, y2= %d, color = 0x%x\n", x1, y1, x2, y2, color);
#endif
// Directly access memory instead of call putpixel function
// to make more effective performance of drawing a line
for (currLine = y1; currLine <= y2; currLine++)
{
switch (BPP)
{
case 8:
memset((ByteType *)((ByteType *)frame_base + startOffset), (color & 0xff), (x2 - x1 + 1) * PIXEL_SIZE);
break;
case 16:
memset((WordType *)((ByteType *)frame_base + startOffset), (color & 0xffff), (x2 - x1 + 1) * PIXEL_SIZE);
break;
}
// Make a LINE_SIZE increment to the startOffset,
// in order to move point to the start position of next line
startOffset += SCREEN_WIDTH * PIXEL_SIZE;
}
return;
}
// Draw a specified character with 16 x 8 dot matrix code on the screen
void fb_Text_8x16(short x, short y, unsigned char * dotCodes, ColorType color)
{
int i, j;
if (x < 0 || x >= SCREEN_WIDTH ||
y < 0 || y >= SCREEN_HEIGHT)
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Pixel out of screen range.\n");
printf("DEBUG_INFO: x = %d, y = %d\n", x, y);
#endif
return;
}
if (dotCodes == NULL)
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Dot codes NULL.\n");
#endif
return;
}
for (i = 0; i < 16; i++)
{
x += 8;
for (j = 0; j < 8; j++)
{
x--;
if ((dotCodes[i] >> j) & 0x1)
{
fb_PutPixel(x, y, color);
}
}
y++;
}
return;
}
// Draw a specified character with 16 x 16 dot matrix code on the screen
void fb_Text_16x16(int x, int y, unsigned char * dotCodes, ColorType color)
{
int i, j, k;
if (x < 0 || x >= SCREEN_WIDTH ||
y < 0 || y >= SCREEN_HEIGHT)
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Pixel out of screen range.\n");
printf("DEBUG_INFO: x = %d, y = %d\n", x, y);
#endif
return;
}
if (dotCodes == NULL)
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Dot codes NULL.\n");
#endif
return;
}
for(i = 0; i < 16; i++)
{
for (j = 0; j < 2; j++)
{
x += 8 * ( j + 1);
for (k = 0; k < 8; k++)
{
x--;
if ((dotCodes[2 * i + j] >> k) & 0x1)
{
fb_PutPixel(x, y, color);
}
}
}
x -= 8;
++y;
}
return;
}
// Draw a ellipse, center at point (x, y),
// a specifies x_axis radius, b specifies y_axis radius
void fb_DrawEllipse(short x, short y, short a, short b, ColorType color)
{ int wx, wy; int thresh; int asq = a * a; int bsq = b * b; int xa, ya; if (a < 0 || b < 0)
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Radius invalid.\n");
printf("DEBUG_INFO: a = %d, b = %d\n", a, b);
#endif
return;
}
fb_PutPixel(x, y + b, color); fb_PutPixel(x, y - b, color); wx = 0; wy = b; xa = 0; ya = asq * 2 * b; thresh = asq / 4 - asq * b; // Draw upper half of ellipse while(1) { thresh += xa + bsq; if (thresh >= 0) { ya -= asq * 2; thresh -= ya; wy--; } xa += bsq * 2; wx++; if (xa >= ya) break; fb_PutPixel(x + wx, y - wy, color); fb_PutPixel(x - wx, y - wy, color); fb_PutPixel(x + wx, y + wy, color); fb_PutPixel(x - wx, y + wy, color); } fb_PutPixel(x + a, y, color); fb_PutPixel(x - a, y, color); wx = a; wy = 0; xa = (bsq * a) << 1; ya = 0; thresh = (bsq >> 2) - bsq * a; // Draw lower half of ellipse while(1) { thresh += ya + asq; if (thresh >= 0) { xa -= bsq + bsq; thresh = thresh - xa; wx--; } ya += asq + asq; wy++; if (ya > xa) break; fb_PutPixel(x + wx, y - wy, color); fb_PutPixel(x - wx, y - wy, color); fb_PutPixel(x + wx, y + wy, color); fb_PutPixel(x - wx, y + wy, color); }}// Draw a ellipse, center at point (x, y),
// a specifies x_axis radius, b specifies y_axis radius
void fb_FillEllipse(short x, short y, short a, short b, ColorType color)
{
int wx, wy;
int thresh;
int asq = a * a;
int bsq = b * b;
int xa, ya;
if (a < 0 || b < 0)
{
#ifdef ERR_DEBUG
printf("DEBUG_INFO: Radius invalid.\n");
printf("DEBUG_INFO: a = %d, b = %d\n", a, b);
#endif
return;
}
fb_PutPixel(x, y + b, color);
fb_PutPixel(x, y - b, color);
wx = 0;
wy = b;
xa = 0;
ya = asq * 2 * b;
thresh = asq / 4 - asq * b;
// Fill upper half of ellipse while(1)
{
thresh += xa + bsq;
if (thresh >= 0)
{
ya -= asq * 2;
thresh -= ya;
wy--;
}
xa += bsq * 2;
wx++;
if (xa >= ya)
break;
fb_DrawLine_H(x - wx, x + wx, y - wy, color);
fb_DrawLine_H(x - wx, x + wx, y + wy, color);
}
fb_DrawLine_H(x - a, x + a, y, color);
wx = a;
wy = 0;
xa = (bsq * a) << 1;
ya = 0;
thresh = (bsq >> 2) - bsq * a;
// Fill lower half of ellipse while(1) {
thresh += ya + asq;
if (thresh >= 0)
{
xa -= bsq + bsq;
thresh = thresh - xa;
wx--;
}
ya += asq + asq;
wy++;
if (ya > xa)
break;
fb_DrawLine_H(x - wx, x + wx, y - wy, color);
fb_DrawLine_H(x - wx, x + wx, y + wy, color);
}
}
#endif // __FB_LCD_C⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -