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mirror of https://bitbucket.org/librepilot/librepilot.git synced 2024-12-01 09:24:10 +01:00

Change the buffers to byte buffers and update most of the drawing code to use

it accordingly.  Large fonts broken.
This commit is contained in:
James Cotton 2012-05-23 23:58:34 -05:00 committed by Sambas
parent fef6567cff
commit b3150500d5
4 changed files with 578 additions and 579 deletions

View File

@ -24,8 +24,8 @@ int32_t osdgenInitialize(void);
// Macros for computing addresses and bit positions.
// NOTE: /16 in y is because we are addressing by word not byte.
#define CALC_BUFF_ADDR(x, y) (((x) / 16) + ((y) * (DISP_WIDTH / 16)))
#define CALC_BIT_IN_WORD(x) ((x) & 15)
#define CALC_BUFF_ADDR(x, y) (((x) / 8) + ((y) * (DISP_WIDTH / 8)))
#define CALC_BIT_IN_WORD(x) ((x) & 7)
#define DEBUG_DELAY
// Macro for writing a word with a mode (NAND = clear, OR = set, XOR = toggle)
// at a given position
@ -41,8 +41,8 @@ int32_t osdgenInitialize(void);
// Horizontal line calculations.
// Edge cases.
#define COMPUTE_HLINE_EDGE_L_MASK(b) ((1 << (16 - (b))) - 1)
#define COMPUTE_HLINE_EDGE_R_MASK(b) (~((1 << (15 - (b))) - 1))
#define COMPUTE_HLINE_EDGE_L_MASK(b) ((1 << (8 - (b))) - 1)
#define COMPUTE_HLINE_EDGE_R_MASK(b) (~((1 << (7 - (b))) - 1))
// This computes an island mask.
#define COMPUTE_HLINE_ISLAND_MASK(b0, b1) (COMPUTE_HLINE_EDGE_L_MASK(b0) ^ COMPUTE_HLINE_EDGE_L_MASK(b1));
@ -159,26 +159,26 @@ void updateGraphics();
void drawGraphicsLine();
void write_char16(char ch, unsigned int x, unsigned int y, int font);
void write_pixel(uint16_t *buff, unsigned int x, unsigned int y, int mode);
void write_pixel(uint8_t *buff, unsigned int x, unsigned int y, int mode);
void write_pixel_lm(unsigned int x, unsigned int y, int mmode, int lmode);
void write_hline(uint16_t *buff, unsigned int x0, unsigned int x1, unsigned int y, int mode);
void write_hline(uint8_t *buff, unsigned int x0, unsigned int x1, unsigned int y, int mode);
void write_hline_lm(unsigned int x0, unsigned int x1, unsigned int y, int lmode, int mmode);
void write_hline_outlined(unsigned int x0, unsigned int x1, unsigned int y, int endcap0, int endcap1, int mode, int mmode);
void write_vline(uint16_t *buff, unsigned int x, unsigned int y0, unsigned int y1, int mode);
void write_vline(uint8_t *buff, unsigned int x, unsigned int y0, unsigned int y1, int mode);
void write_vline_lm(unsigned int x, unsigned int y0, unsigned int y1, int lmode, int mmode);
void write_vline_outlined(unsigned int x, unsigned int y0, unsigned int y1, int endcap0, int endcap1, int mode, int mmode);
void write_filled_rectangle(uint16_t *buff, unsigned int x, unsigned int y, unsigned int width, unsigned int height, int mode);
void write_filled_rectangle(uint8_t *buff, unsigned int x, unsigned int y, unsigned int width, unsigned int height, int mode);
void write_filled_rectangle_lm(unsigned int x, unsigned int y, unsigned int width, unsigned int height, int lmode, int mmode);
void write_rectangle_outlined(unsigned int x, unsigned int y, int width, int height, int mode, int mmode);
void write_circle(uint16_t *buff, unsigned int cx, unsigned int cy, unsigned int r, unsigned int dashp, int mode);
void write_circle(uint8_t *buff, unsigned int cx, unsigned int cy, unsigned int r, unsigned int dashp, int mode);
void write_circle_outlined(unsigned int cx, unsigned int cy, unsigned int r, unsigned int dashp, int bmode, int mode, int mmode);
void write_circle_filled(uint16_t *buff, unsigned int cx, unsigned int cy, unsigned int r, int mode);
void write_line(uint16_t *buff, unsigned int x0, unsigned int y0, unsigned int x1, unsigned int y1, int mode);
void write_circle_filled(uint8_t *buff, unsigned int cx, unsigned int cy, unsigned int r, int mode);
void write_line(uint8_t *buff, unsigned int x0, unsigned int y0, unsigned int x1, unsigned int y1, int mode);
void write_line_lm(unsigned int x0, unsigned int y0, unsigned int x1, unsigned int y1, int mmode, int lmode);
void write_line_outlined(unsigned int x0, unsigned int y0, unsigned int x1, unsigned int y1, int endcap0, int endcap1, int mode, int mmode);
void write_word_misaligned(uint16_t *buff, uint16_t word, unsigned int addr, unsigned int xoff, int mode);
void write_word_misaligned_NAND(uint16_t *buff, uint16_t word, unsigned int addr, unsigned int xoff);
void write_word_misaligned_OR(uint16_t *buff, uint16_t word, unsigned int addr, unsigned int xoff);
void write_word_misaligned(uint8_t *buff, uint16_t word, unsigned int addr, unsigned int xoff, int mode);
void write_word_misaligned_NAND(uint8_t *buff, uint16_t word, unsigned int addr, unsigned int xoff);
void write_word_misaligned_OR(uint8_t *buff, uint16_t word, unsigned int addr, unsigned int xoff);
void write_word_misaligned_lm(uint16_t wordl, uint16_t wordm, unsigned int addr, unsigned int xoff, int lmode, int mmode);
//int fetch_font_info(char ch, int font, struct FontEntry *font_info, char *lookup);
void write_char(char ch, unsigned int x, unsigned int y, int flags, int font);

View File

@ -63,10 +63,10 @@ static int32_t m_gpsLon=0;
static float m_gpsAlt=0;
static float m_gpsSpd=0;
extern uint16_t *draw_buffer_level;
extern uint16_t *draw_buffer_mask;
extern uint16_t *disp_buffer_level;
extern uint16_t *disp_buffer_mask;
extern uint8_t *draw_buffer_level;
extern uint8_t *draw_buffer_mask;
extern uint8_t *disp_buffer_level;
extern uint8_t *disp_buffer_mask;
TTime time;
@ -94,8 +94,8 @@ static xTaskHandle osdgenTaskHandle;
struct splashEntry
{
unsigned int width, height;
unsigned short *level;
unsigned short *mask;
uint8_t *level;
uint8_t *mask;
};
struct splashEntry splash[3] = {
@ -177,33 +177,31 @@ uint8_t printCharFB(uint16_t ch, uint16_t x, uint16_t y) {
uint16_t mirror(uint16_t source)
{
int result = ((source & 0x8000) >> 15) | ((source & 0x4000) >> 13) |
((source & 0x2000) >> 11) | ((source & 0x1000) >> 9) |
((source & 0x0800) >> 7) | ((source & 0x0400) >> 5) |
((source & 0x0200) >> 3) | ((source & 0x0100) >> 1) |
((source & 0x0080) << 1) | ((source & 0x0040) << 3) |
((source & 0x0020) << 5) | ((source & 0x0010) << 7) |
((source & 0x0008) << 9) | ((source & 0x0004) << 11) |
((source & 0x0002) << 13) | ((source & 0x0001) << 15);
int result = ((source & 0x8000) >> 7) | ((source & 0x4000) >> 5) |
((source & 0x2000) >> 3) | ((source & 0x1000) >> 1) |
((source & 0x0800) << 1) | ((source & 0x0400) << 3) |
((source & 0x0200) << 5) | ((source & 0x0100) << 7) |
((source & 0x0080) >> 7) | ((source & 0x0040) >> 5) |
((source & 0x0020) >> 3) | ((source & 0x0010) >> 1) |
((source & 0x0008) << 1) | ((source & 0x0004) << 3) |
((source & 0x0002) << 5) | ((source & 0x0001) << 7);
return result;
}
void clearGraphics() {
memset((uint8_t *) draw_buffer_mask, 0, GRAPHICS_WIDTH * GRAPHICS_HEIGHT * 2);
memset((uint8_t *) draw_buffer_level, 0, GRAPHICS_WIDTH * GRAPHICS_HEIGHT * 2);
memset((uint8_t *) draw_buffer_mask, 0, GRAPHICS_WIDTH * GRAPHICS_HEIGHT);
memset((uint8_t *) draw_buffer_level, 0, GRAPHICS_WIDTH * GRAPHICS_HEIGHT);
}
void copyimage(uint16_t offsetx, uint16_t offsety, int image) {
struct splashEntry splash_info;
splash_info = splash[image];
offsetx=offsetx/16;
int i=0;
offsetx=offsetx/8;
for (uint16_t y = offsety; y < ((splash_info.height)+offsety); y++) {
for (uint16_t x = offsetx; x < (((splash_info.width)/16)+offsetx); x++) {
draw_buffer_level[y*GRAPHICS_WIDTH+x] = mirror(splash_info.level[(y-offsety)*((splash_info.width)/16)+(x-offsetx)]);
draw_buffer_mask[y*GRAPHICS_WIDTH+x] = mirror(splash_info.mask[(y-offsety)*((splash_info.width)/16)+(x-offsetx)]);
i+=2;
for (uint16_t x = offsetx; x < (((splash_info.width)/8)+offsetx); x++) {
draw_buffer_level[y*GRAPHICS_WIDTH+x] = mirror(splash_info.level[(y-offsety)*((splash_info.width)/8)+(x-offsetx)]);
draw_buffer_mask[y*GRAPHICS_WIDTH+x] = mirror(splash_info.mask[(y-offsety)*((splash_info.width)/8)+(x-offsetx)]);
}
}
}
@ -219,9 +217,9 @@ void setPixel(uint16_t x, uint16_t y, uint8_t state) {
if (!validPos(x, y)) {
return;
}
uint8_t bitPos = 15-(x%16);
uint16_t tempf = draw_buffer_level[y*GRAPHICS_WIDTH+x/16];
uint16_t tempm = draw_buffer_mask[y*GRAPHICS_WIDTH+x/16];
uint8_t bitPos = 7-(x%8);
uint16_t tempf = draw_buffer_level[y*GRAPHICS_WIDTH+x/8];
uint16_t tempm = draw_buffer_mask[y*GRAPHICS_WIDTH+x/8];
if (state == 0) {
tempf &= ~(1<<bitPos);
tempm &= ~(1<<bitPos);
@ -234,8 +232,8 @@ void setPixel(uint16_t x, uint16_t y, uint8_t state) {
tempf ^= (1<<bitPos);
tempm ^= (1<<bitPos);
}
draw_buffer_level[y*GRAPHICS_WIDTH+x/16] = tempf;
draw_buffer_mask[y*GRAPHICS_WIDTH+x/16] = tempm;
draw_buffer_level[y*GRAPHICS_WIDTH+x/8] = tempf;
draw_buffer_mask[y*GRAPHICS_WIDTH+x/8] = tempm;
}
// Credit for this one goes to wikipedia! :-)
@ -480,15 +478,16 @@ void drawBox(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
* @param y y coordinate
* @param mode 0 = clear bit, 1 = set bit, 2 = toggle bit
*/
void write_pixel(uint16_t *buff, unsigned int x, unsigned int y, int mode)
void write_pixel(uint8_t *buff, unsigned int x, unsigned int y, int mode)
{
APPLY_DEADBAND(x, y);
CHECK_COORDS(x, y);
// Determine the bit in the word to be set and the word
// index to set it in.
int bitnum = CALC_BIT_IN_WORD(x);
int wordnum = CALC_BUFF_ADDR(x, y);
// Apply a mask.
uint16_t mask = 1 << (15 - bitnum);
uint16_t mask = 1 << (7 - bitnum);
WRITE_WORD_MODE(buff, wordnum, mask, mode);
}
@ -509,7 +508,7 @@ void write_pixel_lm(unsigned int x, unsigned int y, int mmode, int lmode)
int bitnum = CALC_BIT_IN_WORD(x);
int wordnum = CALC_BUFF_ADDR(x, y);
// Apply the masks.
uint16_t mask = 1 << (15 - bitnum);
uint16_t mask = 1 << (7 - bitnum);
WRITE_WORD_MODE(draw_buffer_mask, wordnum, mask, mmode);
WRITE_WORD_MODE(draw_buffer_level, wordnum, mask, lmode);
}
@ -524,7 +523,7 @@ void write_pixel_lm(unsigned int x, unsigned int y, int mmode, int lmode)
* @param y y coordinate
* @param mode 0 = clear, 1 = set, 2 = toggle
*/
void write_hline(uint16_t *buff, unsigned int x0, unsigned int x1, unsigned int y, int mode)
void write_hline(uint8_t *buff, unsigned int x0, unsigned int x1, unsigned int y, int mode)
{
CLIP_COORDS(x0, y);
CLIP_COORDS(x1, y);
@ -557,7 +556,7 @@ void write_hline(uint16_t *buff, unsigned int x0, unsigned int x1, unsigned int
// Now write 0xffff words from start+1 to end-1.
for(i = addr0 + 1; i <= addr1 - 1; i++)
{
WRITE_WORD_MODE(buff, i, 0xffff, mode);
WRITE_WORD_MODE(buff, i, 0xff, mode);
}
}
}
@ -617,7 +616,7 @@ void write_hline_outlined(unsigned int x0, unsigned int x1, unsigned int y, int
* @param y1 y1 coordinate
* @param mode 0 = clear, 1 = set, 2 = toggle
*/
void write_vline(uint16_t *buff, unsigned int x, unsigned int y0, unsigned int y1, int mode)
void write_vline(uint8_t *buff, unsigned int x, unsigned int y0, unsigned int y1, int mode)
{
unsigned int a;
CLIP_COORDS(x, y0);
@ -633,10 +632,10 @@ void write_vline(uint16_t *buff, unsigned int x, unsigned int y0, unsigned int y
int addr1 = CALC_BUFF_ADDR(x, y1);
/* Then we calculate the pixel data to be written. */
int bitnum = CALC_BIT_IN_WORD(x);
uint16_t mask = 1 << (15 - bitnum);
uint16_t mask = 1 << (7 - bitnum);
/* Run from addr0 to addr1 placing pixels. Increment by the number
* of words n each graphics line. */
for(a = addr0; a <= addr1; a += DISP_WIDTH / 16)
for(a = addr0; a <= addr1; a += DISP_WIDTH / 8)
{
WRITE_WORD_MODE(buff, a, mask, mode);
}
@ -702,7 +701,7 @@ void write_vline_outlined(unsigned int x, unsigned int y0, unsigned int y1, int
* @param height rectangle height
* @param mode 0 = clear, 1 = set, 2 = toggle
*/
void write_filled_rectangle(uint16_t *buff, unsigned int x, unsigned int y, unsigned int width, unsigned int height, int mode)
void write_filled_rectangle(uint8_t *buff, unsigned int x, unsigned int y, unsigned int width, unsigned int height, int mode)
{
int yy, addr0_old, addr1_old;
CHECK_COORDS(x, y);
@ -723,7 +722,7 @@ void write_filled_rectangle(uint16_t *buff, unsigned int x, unsigned int y, unsi
while(height--)
{
WRITE_WORD_MODE(buff, addr0, mask, mode);
addr0 += DISP_WIDTH / 16;
addr0 += DISP_WIDTH / 8;
}
}
// Otherwise we need to write the edges and then the middle repeatedly.
@ -739,8 +738,8 @@ void write_filled_rectangle(uint16_t *buff, unsigned int x, unsigned int y, unsi
{
WRITE_WORD_MODE(buff, addr0, mask_l, mode);
WRITE_WORD_MODE(buff, addr1, mask_r, mode);
addr0 += DISP_WIDTH / 16;
addr1 += DISP_WIDTH / 16;
addr0 += DISP_WIDTH / 8;
addr1 += DISP_WIDTH / 8;
yy++;
}
// Now write 0xffff words from start+1 to end-1 for each row.
@ -751,10 +750,10 @@ void write_filled_rectangle(uint16_t *buff, unsigned int x, unsigned int y, unsi
{
for(i = addr0 + 1; i <= addr1 - 1; i++)
{
WRITE_WORD_MODE(buff, i, 0xffff, mode);
WRITE_WORD_MODE(buff, i, 0xff, mode);
}
addr0 += DISP_WIDTH / 16;
addr1 += DISP_WIDTH / 16;
addr0 += DISP_WIDTH / 8;
addr1 += DISP_WIDTH / 8;
yy++;
}
}
@ -810,7 +809,7 @@ void write_rectangle_outlined(unsigned int x, unsigned int y, int width, int hei
* @param dashp dash period (pixels) - zero for no dash
* @param mode 0 = clear, 1 = set, 2 = toggle
*/
void write_circle(uint16_t *buff, unsigned int cx, unsigned int cy, unsigned int r, unsigned int dashp, int mode)
void write_circle(uint8_t *buff, unsigned int cx, unsigned int cy, unsigned int r, unsigned int dashp, int mode)
{
CHECK_COORDS(cx, cy);
int error = -r, x = r, y = 0;
@ -906,7 +905,7 @@ void write_circle_outlined(unsigned int cx, unsigned int cy, unsigned int r, uns
* @param r radius
* @param mode 0 = clear, 1 = set, 2 = toggle
*/
void write_circle_filled(uint16_t *buff, unsigned int cx, unsigned int cy, unsigned int r, int mode)
void write_circle_filled(uint8_t *buff, unsigned int cx, unsigned int cy, unsigned int r, int mode)
{
CHECK_COORDS(cx, cy);
int error = -r, x = r, y = 0, xch = 0;
@ -956,7 +955,7 @@ void write_circle_filled(uint16_t *buff, unsigned int cx, unsigned int cy, unsig
* @param y1 second y coordinate
* @param mode 0 = clear, 1 = set, 2 = toggle
*/
void write_line(uint16_t *buff, unsigned int x0, unsigned int y0, unsigned int x1, unsigned int y1, int mode)
void write_line(uint8_t *buff, unsigned int x0, unsigned int y0, unsigned int x1, unsigned int y1, int mode)
{
// Based on http://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm
int steep = abs(y1 - y0) > abs(x1 - x0);
@ -1141,10 +1140,10 @@ void write_line_outlined(unsigned int x0, unsigned int y0, unsigned int x1, unsi
* @param xoff x offset (0-15)
* @param mode 0 = clear, 1 = set, 2 = toggle
*/
void write_word_misaligned(uint16_t *buff, uint16_t word, unsigned int addr, unsigned int xoff, int mode)
void write_word_misaligned(uint8_t *buff, uint16_t word, unsigned int addr, unsigned int xoff, int mode)
{
uint16_t firstmask = word >> xoff;
uint16_t lastmask = word << (16 - xoff);
uint16_t lastmask = word << (8 - xoff);
WRITE_WORD_MODE(buff, addr, firstmask, mode);
if(xoff > 0)
{
@ -1167,10 +1166,10 @@ void write_word_misaligned(uint16_t *buff, uint16_t word, unsigned int addr, uns
* it doesn't go through a lot of switch logic which slows down text writing
* a lot.
*/
void write_word_misaligned_NAND(uint16_t *buff, uint16_t word, unsigned int addr, unsigned int xoff)
void write_word_misaligned_NAND(uint8_t *buff, uint16_t word, unsigned int addr, unsigned int xoff)
{
uint16_t firstmask = word >> xoff;
uint16_t lastmask = word << (16 - xoff);
uint16_t lastmask = word << (8 - xoff);
WRITE_WORD_NAND(buff, addr, firstmask);
if(xoff > 0)
{
@ -1193,10 +1192,10 @@ void write_word_misaligned_NAND(uint16_t *buff, uint16_t word, unsigned int addr
* it doesn't go through a lot of switch logic which slows down text writing
* a lot.
*/
void write_word_misaligned_OR(uint16_t *buff, uint16_t word, unsigned int addr, unsigned int xoff)
void write_word_misaligned_OR(uint8_t *buff, uint16_t word, unsigned int addr, unsigned int xoff)
{
uint16_t firstmask = word >> xoff;
uint16_t lastmask = word << (16 - xoff);
uint16_t lastmask = word << (8 - xoff);
WRITE_WORD_OR(buff, addr, firstmask);
if(xoff > 0)
{
@ -1280,7 +1279,7 @@ void write_char16(char ch, unsigned int x, unsigned int y, int font)
row = ch * font_info.height;
row_temp = row;
addr_temp = addr;
xshift = 16 - font_info.width;
xshift = 8 - font_info.width;
// We can write mask words easily.
for(yy = y; yy < y + font_info.height; yy++)
{
@ -1288,7 +1287,7 @@ void write_char16(char ch, unsigned int x, unsigned int y, int font)
write_word_misaligned_OR(draw_buffer_mask, font_mask12x18[row] << xshift, addr, wbit);
else
write_word_misaligned_OR(draw_buffer_mask, font_mask8x10[row] << xshift, addr, wbit);
addr += DISP_WIDTH / 16;
addr += DISP_WIDTH / 8;
row++;
}
// Level bits are more complicated. We need to set or clear
@ -1317,7 +1316,7 @@ void write_char16(char ch, unsigned int x, unsigned int y, int font)
// If we're not bold write the AND mask.
//if(!(flags & FONT_BOLD))
write_word_misaligned_NAND(draw_buffer_level, and_mask, addr, wbit);
addr += DISP_WIDTH / 16;
addr += DISP_WIDTH / 8;
row++;
}
}
@ -1364,12 +1363,12 @@ void write_char(char ch, unsigned int x, unsigned int y, int flags, int font)
row = lookup * font_info.height * 2;
row_temp = row;
addr_temp = addr;
xshift = 16 - font_info.width;
xshift = 8 - font_info.width;
// We can write mask words easily.
for(yy = y; yy < y + font_info.height; yy++)
{
write_word_misaligned_OR(draw_buffer_mask, font_info.data[row] << xshift, addr, wbit);
addr += DISP_WIDTH / 16;
addr += DISP_WIDTH / 8;
row++;
}
// Level bits are more complicated. We need to set or clear
@ -1389,7 +1388,7 @@ void write_char(char ch, unsigned int x, unsigned int y, int flags, int font)
// If we're not bold write the AND mask.
//if(!(flags & FONT_BOLD))
write_word_misaligned_NAND(draw_buffer_level, and_mask, addr, wbit);
addr += DISP_WIDTH / 16;
addr += DISP_WIDTH / 8;
row++;
}
}

View File

@ -45,10 +45,10 @@ static const struct pios_video_cfg * dev_cfg;
// Must be allocated in one block, so it is in a struct.
struct _buffers
{
uint16_t buffer0_level[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
uint16_t buffer0_mask[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
uint16_t buffer1_level[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
uint16_t buffer1_mask[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
uint8_t buffer0_level[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
uint8_t buffer0_mask[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
uint8_t buffer1_level[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
uint8_t buffer1_mask[GRAPHICS_HEIGHT*GRAPHICS_WIDTH];
} buffers;
// Remove the struct definition (makes it easier to write for.)
@ -58,10 +58,10 @@ struct _buffers
#define buffer1_mask (buffers.buffer1_mask)
// We define pointers to each of these buffers.
uint16_t *draw_buffer_level;
uint16_t *draw_buffer_mask;
uint16_t *disp_buffer_level;
uint16_t *disp_buffer_mask;
uint8_t *draw_buffer_level;
uint8_t *draw_buffer_mask;
uint8_t *disp_buffer_level;
uint8_t *disp_buffer_mask;
volatile uint8_t gLineType = LINE_TYPE_UNKNOWN;
volatile uint16_t gActiveLine = 0;

View File

@ -76,11 +76,11 @@ extern void PIOS_Vsync_ISR();
#define GRAPHICS_WIDTH_REAL 336
#define GRAPHICS_HEIGHT_REAL 270
#define GRAPHICS_WIDTH (GRAPHICS_WIDTH_REAL/16)
#define GRAPHICS_WIDTH (GRAPHICS_WIDTH_REAL/8)
#define GRAPHICS_HEIGHT GRAPHICS_HEIGHT_REAL
// dma lenght
#define BUFFER_LINE_LENGTH (GRAPHICS_WIDTH*2) //Yes, in 16 bit halfwords.
#define BUFFER_LINE_LENGTH (GRAPHICS_WIDTH) //Yes, in bytes.
// line types
#define LINE_TYPE_UNKNOWN 0