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Merge remote-tracking branch 'origin/master'

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# Conflicts:
#	src/test/kc/examples/mega65/linedrawing.c
This commit is contained in:
jespergravgaard 2021-04-04 09:24:10 +02:00
commit 9fbaf71e31
1 changed files with 19 additions and 22 deletions
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37
src/test/kc/examples/mega65/linedrawing.c
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@ -40,8 +40,8 @@ void lpoke(__zp unsigned long addr, char val) {
// Graphics mode is 1 byte per pixel. Addressing is based on columns of 8px * 200px arranged to have linear addressing.
// addr = (x/8) * 64 * 25 + (y*8) + (x&7)
char line_dma_command[] = {
DMA_OPTION_LINE_XSTEP_LO, LOBYTE(25*64 - 8), // Line X step bytes 64x25
DMA_OPTION_LINE_XSTEP_HI, HIBYTE(25*64 - 8), // Line X step bytes 64x25
DMA_OPTION_LINE_XSTEP_LO, (25*64 - 8) & 0xff, // Line X step bytes 64x25
DMA_OPTION_LINE_XSTEP_HI, (25*64 - 8) >> 8, // Line X step bytes 64x25
DMA_OPTION_LINE_SLOPE_LO, 0, // Line Slope
DMA_OPTION_LINE_SLOPE_HI, 0, // Line Slope
DMA_OPTION_LINE_SLOPE_INIT_LO, LOBYTE(32768), // Line slope init
@ -91,8 +91,8 @@ void line_dma_execute(unsigned long addr, unsigned int slope, unsigned int count
// Count is number of pixels, i.e., dy.
line_dma_command[LINE_DMA_COMMAND_COUNT_OFFSET] = LOBYTE(count);
line_dma_command[LINE_DMA_COMMAND_COUNT_OFFSET + 1] = HIBYTE(count);
// Line mode active, major axis is Y
line_dma_command[LINE_DMA_COMMAND_MODE_OFFSET] = DMA_OPTION_LINE_MODE_ENABLE + (is_direction_y ? DMA_OPTION_LINE_MODE_DIRECTION_Y : 0x00) + (is_slope_negative ? DMA_OPTION_LINE_MODE_SLOPE_NEGATIVE : 0x00);
// Line mode
line_dma_command[LINE_DMA_COMMAND_MODE_OFFSET] = DMA_OPTION_LINE_MODE_ENABLE + (is_direction_y?DMA_OPTION_LINE_MODE_DIRECTION_Y:0) + (is_slope_negative?DMA_OPTION_LINE_MODE_SLOPE_NEGATIVE:0);
// Set address of DMA list
DMA->ADDRMB = 0;
DMA->ADDRBANK = 0;
@ -131,12 +131,12 @@ void main() {
draw_line(160, 100, 319, 0, 4);
*/
for(int x1=0;x1<320;x1+=10) {
for(int x1=0;x1<320;x1+=11) {
draw_line(x1, 0, 160, 199, 5);
draw_line(160, 0, x1, 199, 5);
}
for(int y1=0;y1<200;y1+=10) {
for(int y1=0;y1<200;y1+=11) {
draw_line(0, y1, 319, 100, 6);
draw_line(0, 100, 319, y1, 6);
}
@ -220,8 +220,8 @@ void draw_line(int x1, int y1, int x2, int y2, unsigned char colour) {
}
// Use hardware divider to get the slope
*MATH_MULTINA_INT0 = dx;
*MATH_MULTINB_INT0 = dy;
*MATH_MULTINA_INT0 = dx*2+1;
*MATH_MULTINB_INT0 = dy*2;
*MATH_MULTINA_INT1 = 0;
*MATH_MULTINB_INT1 = 0;
@ -233,13 +233,12 @@ void draw_line(int x1, int y1, int x2, int y2, unsigned char colour) {
lda MATH_DIVOUT_FRAC_INT1 @nooptimize
}
// Slope is the most significant bytes of the fractional part of the division result
// Perform rounding by examining the next bit also
unsigned int slope = (unsigned int)*MATH_DIVOUT_FRAC_INT1 + (((char)*MATH_DIVOUT_FRAC_CHAR1&0x80)?1:0);
unsigned int slope_init = 32768;
unsigned int slope = (unsigned int)*MATH_DIVOUT_FRAC_INT1;
unsigned long addr = GRAPHICS + (unsigned int)(x1/8) * 64 * 25 + (unsigned int)(y1*8) + (unsigned char)(x1&7);
unsigned int count = (unsigned int)dy;
char is_slope_negative = ((x2 - x1) < 0)?1:0;
line_dma_execute(addr, slope, count, colour, 1, is_slope_negative);
char is_slope_negative = ((x2 - x1) < 0) ? 1 : 0;
char is_direction_y = 1;
line_dma_execute(addr, slope, count, colour, is_slope_negative, is_direction_y);
} else {
// X is major axis
@ -253,8 +252,8 @@ void draw_line(int x1, int y1, int x2, int y2, unsigned char colour) {
}
// Use hardware divider to get the slope
*MATH_MULTINA_INT0 = dy;
*MATH_MULTINB_INT0 = dx;
*MATH_MULTINA_INT0 = dy*2+1;
*MATH_MULTINB_INT0 = dx*2;
*MATH_MULTINA_INT1 = 0;
*MATH_MULTINB_INT1 = 0;
@ -265,14 +264,12 @@ void draw_line(int x1, int y1, int x2, int y2, unsigned char colour) {
lda MATH_DIVOUT_FRAC_INT1 @nooptimize
lda MATH_DIVOUT_FRAC_INT1 @nooptimize
}
// Slope is the most significant bytes of the fractional part of the division result
// Perform rounding by examining the next bit also
unsigned int slope = (unsigned int)*MATH_DIVOUT_FRAC_INT1 + (((char)*MATH_DIVOUT_FRAC_CHAR1&0x80)?1:0);
unsigned int slope = (unsigned int)*MATH_DIVOUT_FRAC_INT1;
unsigned long addr = GRAPHICS + (unsigned int)(x1/8) * 64 * 25 + (unsigned int)(y1*8) + (unsigned char)(x1&7);
unsigned int count = (unsigned int)dx;
char is_slope_negative = ((y2 - y1) < 0) ? 1 : 0;
line_dma_execute(addr, slope, count, colour, 0, is_slope_negative);
char is_direction_y = 0;
line_dma_execute(addr, slope, count, colour, is_slope_negative, is_direction_y);
}
}