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Fixed generic main_bg_se_copy_rect_1_tile_vert() function and replaced some code with it

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This commit is contained in:
MeirGavish
2025-07-10 23:20:44 +03:00
parent 6ef1f51c55
commit 05f4cc2abb
3 changed files with 51 additions and 61 deletions
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source/graphic_utils.c
+19 -17
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@@ -4,19 +4,15 @@
#include "graphic_utils.h"
/*
*
*/
const Rect FULL_SCREENBLOCK_RECT = { 0, 0, SE_ROW_LEN, SE_COL_LEN };
// Clips a rect of screenblock entries to a specified rect
static void clip_se_rect_to_bounding_rect(Rect* rect, const Rect* bounding_rect)
{
rect->right = min(rect->right, SE_ROW_LEN);
rect->bottom = min(rect->bottom, SE_COL_LEN);
rect->left = max(rect->left, 0);
rect->top = max(rect->top, 0);
rect->right = min(rect->right, bounding_rect->right);
rect->bottom = min(rect->bottom, bounding_rect->bottom);
rect->left = max(rect->left, bounding_rect->left);
rect->top = max(rect->top, bounding_rect->top);
}
// Can be unstaticed if needed
@@ -32,29 +28,35 @@ void main_bg_se_clear_rect(Rect se_rect)
{
if (se_rect.left > se_rect.right)
return;
// Just to make sure we're not overflowing the boundaries
// Clip to avoid screenblock overflow
clip_se_rect_to_screenblock(&se_rect);
for (int y = se_rect.top; y < se_rect.bottom; y++)
{
memset16(&(se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * y]), 0x0000, se_rect.right - se_rect.left);
memset16(&(se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * y]), 0x0000, se_rect.right - se_rect.left + 1);
}
}
void main_bg_se_copy_rect_1_tile_up(Rect se_rect)
void main_bg_se_copy_rect_1_tile_vert(Rect se_rect, int direction)
{
if (se_rect.left > se_rect.right)
if (se_rect.left > se_rect.right
|| (direction != SE_UP && direction != SE_DOWN))
return;
// Clip to avoid read/write overflow of the screenblock
Rect bounding_rect = FULL_SCREENBLOCK_RECT;
bounding_rect.top = 1; // Since we're going up, need to clip to 1 to not overflow
bounding_rect.top = 1;
bounding_rect.bottom = SE_COL_LEN - 1;
clip_se_rect_to_bounding_rect(&se_rect, &bounding_rect);
for (int y = se_rect.top; y < se_rect.bottom; y++)
int start = (direction == SE_UP) ? se_rect.top : se_rect.bottom;
int end = (direction == SE_UP) ? se_rect.bottom : se_rect.top;
for (int y = start; y != end - direction; y -= direction)
{
memcpy16(&se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * (y - 1)],
memcpy16(&se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * (y + direction)],
&se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * y],
se_rect.right - se_rect.left);
se_rect.right - se_rect.left + 1);
}
}