diff options
| -rw-r--r-- | csrc/drawing.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/csrc/drawing.c b/csrc/drawing.c index eca1431..6e1c0f2 100644 --- a/csrc/drawing.c +++ b/csrc/drawing.c @@ -448,3 +448,79 @@ void fcn_4563f5(uint16_t *a0, struct graph_st *a1, int a2, int a3) { fcn_00455b3a(640, 480, a0, a1, a2, a3); } + +/* overlay the graph a2 on top of a1, + * a1 has width a0 + * (xpos, ypos) is the center of a2 after putting on a1 + * a2 has size width*height + */ +void graph_overlay2(int a0, uint16_t *a1, struct graph_st *a2, + int xpos, int ypos, int a2x, int a2y, int width, int height, int a9) +{ + /* let (xpos, ypos) be the left-top corner */ + xpos -= a2->x; + ypos -= a2->y; + if ((a9 & 1) == 0) { + if (xpos >= 640 || xpos + width <= 0) + return; + + if (xpos + width > 640) { + width = 640 - xpos; + } else if (xpos < 0) { + width += xpos; + a2x -= xpos; + xpos = 0; + } + + if (ypos >= 480 || ypos + height <= 0) + return; + + if (ypos + height > 480) { + height = 480 - ypos; + } else if (ypos < 0) { + height += ypos; + a2y -= ypos; + ypos = 0; + } + } else { + if (xpos >= dw_4861c0 || xpos + width <= dw_4861b8) + return; + + if (xpos + width > dw_4861c0) { + width = dw_4861c0 - xpos; + } else if (xpos < dw_4861b8) { + width += xpos - dw_4861b8; + a2x += dw_4861b8 - xpos; + xpos = dw_4861b8; + } + + if (ypos >= dw_4861c4 || ypos + height <= dw_4861bc) + return; + + if (ypos + height > dw_4861c4) { + height = dw_4861c4 - ypos; + } else if (ypos < dw_4861bc) { + height += ypos - dw_4861bc; + a2y += dw_4861bc - ypos; + ypos = dw_4861bc; + } + } + + uint16_t *src = &a2->gdata[a2->width * a2y + a2x]; + uint16_t *dst = &a1[a0 * ypos + xpos]; + + if (width == 0) + return; + + for (int i = 0; i < height; i++) { + memcpy(dst, src, width * 2); + src += a2->width; + dst += a0; + } +} + +void overlay_fullwidth(uint16_t *a0, struct graph_st *a1, + int a2, int a3, int a4, int a5, int a6, int a7) +{ + graph_overlay2(640, a0, a1, a2, a3, a4, a5, a6, a7, 0); +} |