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Small bg drawing optimization

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This commit is contained in:
Estellar 2025-11-15 19:41:08 -03:00
parent 61e06cae08
commit 1d754945dd
1 changed files with 24 additions and 30 deletions
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54
src/bg.c
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@ -911,8 +911,6 @@ void CopyBgTilemapBufferToVram(u32 bg)
void CopyToBgTilemapBufferRect(u32 bg, const void *src, u8 destX, u8 destY, u8 width, u8 height)
{
u16 destX16;
u16 destY16;
u16 mode;
if (!IsInvalidBg(bg) && !IsTileMapOutsideWram(bg))
@ -922,11 +920,11 @@ void CopyToBgTilemapBufferRect(u32 bg, const void *src, u8 destX, u8 destY, u8 w
case BG_TYPE_NORMAL:
{
const u16 *srcCopy = src;
for (destY16 = destY; destY16 < (destY + height); destY16++)
for (u32 j = destY; j < (destY + height); j++)
{
for (destX16 = destX; destX16 < (destX + width); destX16++)
for (u32 i = destX; i < (destX + width); i++)
{
((u16 *)sGpuBgConfigs2[bg].tilemap)[((destY16 * 0x20) + destX16)] = *srcCopy++;
((u16 *)sGpuBgConfigs2[bg].tilemap)[((j * 0x20) + i)] = *srcCopy++;
}
}
break;
@ -935,11 +933,11 @@ void CopyToBgTilemapBufferRect(u32 bg, const void *src, u8 destX, u8 destY, u8 w
{
const u8 *srcCopy = src;
mode = GetBgMetricAffineMode(bg, 0x1);
for (destY16 = destY; destY16 < (destY + height); destY16++)
for (u32 j = destY; j < (destY + height); j++)
{
for (destX16 = destX; destX16 < (destX + width); destX16++)
for (u32 i = destX; i < (destX + width); i++)
{
((u8 *)sGpuBgConfigs2[bg].tilemap)[((destY16 * mode) + destX16)] = *srcCopy++;
((u8 *)sGpuBgConfigs2[bg].tilemap)[((j * mode) + i)] = *srcCopy++;
}
}
break;
@ -958,7 +956,6 @@ void CopyRectToBgTilemapBufferRect(u32 bg, const void *src, u8 srcX, u8 srcY, u8
u16 screenWidth, screenHeight, screenSize;
u16 var;
const void *srcPtr;
u16 i, j;
if (!IsInvalidBg(bg) && !IsTileMapOutsideWram(bg))
{
@ -969,11 +966,11 @@ void CopyRectToBgTilemapBufferRect(u32 bg, const void *src, u8 srcX, u8 srcY, u8
{
case BG_TYPE_NORMAL:
srcPtr = src + ((srcY * srcWidth) + srcX) * 2;
for (i = destY; i < (destY + rectHeight); i++)
for (u32 j = destY; j < (destY + rectHeight); j++)
{
for (j = destX; j < (destX + rectWidth); j++)
for (u32 i = destX; i < (destX + rectWidth); i++)
{
u16 index = GetTileMapIndexFromCoords(j, i, screenSize, screenWidth, screenHeight);
u16 index = GetTileMapIndexFromCoords(i, j, screenSize, screenWidth, screenHeight);
CopyTileMapEntry(srcPtr, sGpuBgConfigs2[bg].tilemap + (index * 2), palette1, tileOffset, palette2);
srcPtr += 2;
}
@ -983,11 +980,11 @@ void CopyRectToBgTilemapBufferRect(u32 bg, const void *src, u8 srcX, u8 srcY, u8
case BG_TYPE_AFFINE:
srcPtr = src + ((srcY * srcWidth) + srcX);
var = GetBgMetricAffineMode(bg, 0x1);
for (i = destY; i < (destY + rectHeight); i++)
for (u32 j = destY; j < (destY + rectHeight); j++)
{
for (j = destX; j < (destX + rectWidth); j++)
for (u32 i = destX; i < (destX + rectWidth); i++)
{
*(u8 *)(sGpuBgConfigs2[bg].tilemap + ((var * i) + j)) = *(u8 *)(srcPtr) + tileOffset;
*(u8 *)(sGpuBgConfigs2[bg].tilemap + ((var * j) + i)) = *(u8 *)(srcPtr) + tileOffset;
srcPtr++;
}
srcPtr += (srcWidth - rectWidth);
@ -999,8 +996,6 @@ void CopyRectToBgTilemapBufferRect(u32 bg, const void *src, u8 srcX, u8 srcY, u8
void FillBgTilemapBufferRect_Palette0(u32 bg, u16 tileNum, u8 x, u8 y, u8 width, u8 height)
{
u16 x16;
u16 y16;
u16 mode;
if (!IsInvalidBg(bg) && !IsTileMapOutsideWram(bg))
@ -1008,21 +1003,21 @@ void FillBgTilemapBufferRect_Palette0(u32 bg, u16 tileNum, u8 x, u8 y, u8 width,
switch (GetBgType(bg))
{
case BG_TYPE_NORMAL:
for (y16 = y; y16 < (y + height); y16++)
for (u32 j = y; j < (y + height); j++)
{
for (x16 = x; x16 < (x + width); x16++)
for (u32 i = x; i < (x + width); i++)
{
((u16 *)sGpuBgConfigs2[bg].tilemap)[((y16 * 0x20) + x16)] = tileNum;
((u16 *)sGpuBgConfigs2[bg].tilemap)[((j * 0x20) + i)] = tileNum;
}
}
break;
case BG_TYPE_AFFINE:
mode = GetBgMetricAffineMode(bg, 0x1);
for (y16 = y; y16 < (y + height); y16++)
for (u32 j = y; j < (y + height); j++)
{
for (x16 = x; x16 < (x + width); x16++)
for (u32 i = x; i < (x + width); i++)
{
((u8 *)sGpuBgConfigs2[bg].tilemap)[((y16 * mode) + x16)] = tileNum;
((u8 *)sGpuBgConfigs2[bg].tilemap)[((j * mode) + i)] = tileNum;
}
}
break;
@ -1041,7 +1036,6 @@ void WriteSequenceToBgTilemapBuffer(u32 bg, u16 firstTileNum, u8 x, u8 y, u8 wid
u16 mode2;
u16 attribute;
u16 mode3;
u16 x16, y16;
if (!IsInvalidBg(bg) && !IsTileMapOutsideWram(bg))
{
@ -1051,22 +1045,22 @@ void WriteSequenceToBgTilemapBuffer(u32 bg, u16 firstTileNum, u8 x, u8 y, u8 wid
switch (GetBgType(bg))
{
case BG_TYPE_NORMAL:
for (y16 = y; y16 < (y + height); y16++)
for (u32 j = y; j < (y + height); j++)
{
for (x16 = x; x16 < (x + width); x16++)
for (u32 i = x; i < (x + width); i++)
{
CopyTileMapEntry(&firstTileNum, &((u16 *)sGpuBgConfigs2[bg].tilemap)[(u16)GetTileMapIndexFromCoords(x16, y16, attribute, mode, mode2)], paletteSlot, 0, 0);
CopyTileMapEntry(&firstTileNum, &((u16 *)sGpuBgConfigs2[bg].tilemap)[(u16)GetTileMapIndexFromCoords(i, j, attribute, mode, mode2)], paletteSlot, 0, 0);
firstTileNum = (firstTileNum & 0xFC00) + ((firstTileNum + tileNumDelta) & 0x3FF);
}
}
break;
case BG_TYPE_AFFINE:
mode3 = GetBgMetricAffineMode(bg, 0x1);
for (y16 = y; y16 < (y + height); y16++)
for (u32 j = y; j < (y + height); j++)
{
for (x16 = x; x16 < (x + width); x16++)
for (u32 i = x; i < (x + width); i++)
{
((u8 *)sGpuBgConfigs2[bg].tilemap)[(y16 * mode3) + x16] = firstTileNum;
((u8 *)sGpuBgConfigs2[bg].tilemap)[(j * mode3) + i] = firstTileNum;
firstTileNum = (firstTileNum & 0xFC00) + ((firstTileNum + tileNumDelta) & 0x3FF);
}
}