66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
#include <tonc_core.h>
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#include <tonc_tte.h>
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#include <tonc_math.h>
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#include "graphic_utils.h"
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/*
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*
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*/
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const Rect FULL_SCREENBLOCK_RECT = { 0, 0, SE_ROW_LEN, SE_COL_LEN };
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// Clips a rect of screenblock entries to a specified rect
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static void clip_se_rect_to_bounding_rect(Rect* rect, const Rect* bounding_rect)
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{
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rect->right = min(rect->right, SE_ROW_LEN);
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rect->bottom = min(rect->bottom, SE_COL_LEN);
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rect->left = max(rect->left, 0);
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rect->top = max(rect->top, 0);
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}
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// Can be unstaticed if needed
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// Clips a rect of screenblock entries to screenblock boundaries
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// The bounding rect is not required to be within screenblock boundaries
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static void clip_se_rect_to_screenblock(Rect* rect)
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{
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clip_se_rect_to_bounding_rect(rect, &FULL_SCREENBLOCK_RECT);
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}
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void main_bg_se_clear_rect(Rect se_rect)
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{
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if (se_rect.left > se_rect.right)
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return;
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// Just to make sure we're not overflowing the boundaries
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clip_se_rect_to_screenblock(&se_rect);
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for (int y = se_rect.top; y < se_rect.bottom; y++)
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{
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memset16(&(se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * y]), 0x0000, se_rect.right - se_rect.left);
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}
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}
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void main_bg_se_copy_rect_1_tile_up(Rect se_rect)
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{
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if (se_rect.left > se_rect.right)
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return;
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Rect bounding_rect = FULL_SCREENBLOCK_RECT;
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bounding_rect.top = 1; // Since we're going up, need to clip to 1 to not overflow
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clip_se_rect_to_bounding_rect(&se_rect, &bounding_rect);
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for (int y = se_rect.top; y < se_rect.bottom; y++)
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{
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memcpy16(&se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * (y - 1)],
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&se_mem[MAIN_BG_SBB][se_rect.left + SE_ROW_LEN * y],
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se_rect.right - se_rect.left);
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}
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}
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void tte_erase_rect_wrapper(Rect rect)
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{
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tte_erase_rect(rect.left, rect.top, rect.right, rect.bottom);
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}
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