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rendering a background is done tested with red.smc

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This commit is contained in:
Clément Le Bihan
2020-05-14 01:05:27 +02:00
parent 838c33b1cf
commit c8f7af7ea3
1 changed files with 21 additions and 22 deletions
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sources/PPU/PPU.cpp
+21 -22
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@@ -422,25 +422,21 @@ namespace ComSquare::PPU
void PPU::renderBackground(int bgNumber, Vector2<int> characterSize, int bpp, bool priority)
{
int nbCharactersHeight = (this->_registers._bgsc[bgNumber - 1].tilemapVerticalMirroring) ? 2 : 1;
int nbCharactersWidth = (this->_registers._bgsc[bgNumber - 1].tilemapHorizontalMirroring) ? 2 : 1;
int nbBgHeight = (this->_registers._bgsc[bgNumber - 1].tilemapVerticalMirroring) ? 2 : 1;
int nbBgWidth = (this->_registers._bgsc[bgNumber - 1].tilemapHorizontalMirroring) ? 2 : 1;
uint16_t vramAddress = this->_registers._bgsc[bgNumber - 1].tilemapAddress << 1U;
Vector2<int> offset(0, 0);
// find an efficient way to render tilemap in order with correct offset and vramaddresses:
for (int i = 0; i < nbCharactersWidth ; i++) {
drawBasicTileMap(vramAddress, bgNumber, bpp, characterSize, offset);
vramAddress += 0x800;
offset.x += 32 * characterSize.x;
}
if (nbCharactersWidth == 1 && nbCharactersHeight == 2) {
vramAddress += 0x800;
nbCharactersHeight = 1;
offset.x = 0;
}
for (int i = 0; i < nbCharactersHeight ; i++) {
drawBasicTileMap(vramAddress, bgNumber, bpp, characterSize, offset);
vramAddress += 0x800;
for (int i = 0; i < 4; i++) {
if (!(i == 1 && nbBgWidth == 1) && !(i > 1 && nbBgHeight == 1)) {
drawBasicTileMap(vramAddress, bgNumber, bpp, characterSize, offset);
}
vramAddress+= 0x800;
offset.x += 32 * characterSize.x;
if (i == 2) {
offset.x = 0;
offset.y += 32 * characterSize.y;
}
}
}
@@ -466,7 +462,6 @@ namespace ComSquare::PPU
tileData.raw = data;
graphicAddress = this->getGraphicVramAddress(tileData.posX, tileData.posY, bg, bpp);
// loop on all pixels of the tile 8x8 6x16 16x8 8x16
for (int i = 0; i < characterSize.y; i++) {
for (int j = 0; j < characterSize.x; j++) {
palette = getPalette(tileData.palette);
@@ -475,7 +470,7 @@ namespace ComSquare::PPU
this->_renderer.putPixel(pos.x, pos.y, color);
index++;
pos.x++;
if (index == 8 / bpp - 1) {
if (index == (8 / bpp) - 1) {
index = 0;
graphicAddress++;
}
@@ -539,14 +534,18 @@ namespace ComSquare::PPU
Vector2<int> pos(0,0);
uint16_t vramAddress = baseAddress;
for (int j = baseAddress; j < (0x800 / 2) + baseAddress; j++) {
while (vramAddress < 0x800 + baseAddress) {
tileMapValue = this->vram->read_internal(vramAddress);
tileMapValue += this->vram->read_internal(vramAddress + 1) << 8U;
vramAddress += 2;
drawBgTile(tileMapValue, {((pos.x - pos.y * 32) * characterSize.x) + offset.x, (pos.y * characterSize.y) + offset.x}, bgNumber, bpp, characterSize);
pos.x++;
if (j % 32 == 0)
drawBgTile(tileMapValue, {(pos.x * characterSize.x) + offset.x, (pos.y * characterSize.y) + offset.y}, bgNumber, bpp, characterSize);
//pos.x++;
if (pos.x % 31 == 0 && pos.x) {
pos.y++;
pos.x = 0;
}
else
pos.x++;
}
}
}