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starting clarify code

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This commit is contained in:
Clément Le Bihan
2020-09-07 00:33:22 +02:00
parent f00f8d931e
commit fa97b2ab38
4 changed files with 17 additions and 9 deletions
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15
sources/PPU/Background.cpp
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@@ -29,18 +29,18 @@ namespace ComSquare::PPU
{
uint16_t vramAddress = this->_TileMapStartAddress;
Vector2<int> offset(0, 0);
this->backgroundSize.x = this->_tileMaps.x * this->_characterSize.x * 32;
this->backgroundSize.y = this->_tileMaps.y * this->_characterSize.y * 32;
this->backgroundSize.x = this->_tileMaps.x * this->_characterSize.x * NB_CHARACTER_WIDTH;
this->backgroundSize.y = this->_tileMaps.y * this->_characterSize.y * NB_CHARACTER_HEIGHT;
for (int i = 0; i < 4; i++) {
if (!(i == 1 && this->_tileMaps.x == 1) && !(i > 1 && this->_tileMaps.y == 1)) {
drawBasicTileMap(vramAddress, offset);
}
vramAddress+= 0x800;
offset.x += 32 * this->_characterSize.x;
vramAddress += 0x800;
offset.x += NB_CHARACTER_WIDTH * this->_characterSize.x;
if (i == 2) {
offset.x = 0;
offset.y += 32 * this->_characterSize.y;
offset.y += NB_CHARACTER_HEIGHT * this->_characterSize.y;
}
}
}
@@ -57,7 +57,9 @@ namespace ComSquare::PPU
tileData.raw = data;
palette = getPalette(tileData.palette);
// TODO explain X and Y and rethink the formula
graphicAddress = this->_tileSetAddress + (tileData.posX * 16 * this->_bpp * 8) + (tileData.posY * this->_bpp * 8);
// X horizontal
// Y vertical
graphicAddress = this->_tileSetAddress + (tileData.posY * 16 * this->_bpp * 8) + (tileData.posX * this->_bpp * 8);
for (int i = 0; i < this->_characterSize.y; i++) {
for (int j = 0; j < this->_characterSize.x; j++) {
reference = getTilePixelReference(graphicAddress, index);
@@ -129,6 +131,7 @@ namespace ComSquare::PPU
uint16_t vramAddress = baseAddress;
while (vramAddress < baseAddress + 0x800) {
// TODO function to read 2 bytes (LSB order or bits reversed)
tileMapValue = this->_vram->read_internal(vramAddress);
tileMapValue += this->_vram->read_internal(vramAddress + 1) << 8U;
drawBgTile(tileMapValue, {(pos.x * this->_characterSize.x) + offset.x, (pos.y * this->_characterSize.y) + offset.y});