Revision 160
implemented sprite rotation
| graphics.c | ||
|---|---|---|
| 198 | 198 |
return SUCCESS; |
| 199 | 199 |
} |
| 200 | 200 |
|
| 201 |
|
|
| 202 | 201 |
int (set_pixel)(uint16_t x, uint16_t y, uint32_t color) {
|
| 203 | 202 |
if (x >= vbe_mem_info.XResolution || y >= vbe_mem_info.YResolution) {
|
| 204 | 203 |
printf("%s: invalid pixel.\n", __func__);
|
| ... | ... | |
| 208 | 207 |
memcpy((void*)((unsigned int)video_mem + pos), &color, get_bytes_pixel()); |
| 209 | 208 |
return SUCCESS; |
| 210 | 209 |
} |
| 210 |
int (set_pixel_alpha)(uint16_t x, uint16_t y, uint32_t color, uint8_t alpha){
|
|
| 211 |
unsigned int pos = (x + y * vbe_mem_info.XResolution) * get_bytes_pixel(); |
|
| 212 |
uint32_t color_; |
|
| 213 |
memcpy(&color_, (void*)((unsigned int)video_mem + pos), get_bytes_pixel()); |
|
| 214 |
float a = 1.0-(alpha&0xFF)/(float)0xFF; |
|
| 215 |
uint8_t r = GET_RED(color)*a + GET_RED(color_)*(1.0-a); |
|
| 216 |
uint8_t g = GET_GRE(color)*a + GET_GRE(color_)*(1.0-a); |
|
| 217 |
uint8_t b = GET_BLU(color)*a + GET_BLU(color_)*(1.0-a); |
|
| 218 |
return set_pixel(x,y,SET_RGB(r,g,b)); |
|
| 219 |
//return set_pixel(x,y,color); |
|
| 220 |
} |
|
| 211 | 221 |
|
| 212 | 222 |
int (draw_hline)(uint16_t x, uint16_t y, uint16_t len, uint32_t color){
|
| 213 | 223 |
int r; |
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