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optimized sprites

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This commit is contained in:
Irmen de Jong 2019-10-12 14:02:26 +02:00
parent ea4b5239cc
commit 6c9fe7a26a
1 changed files with 39 additions and 43 deletions
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82
src/main/kotlin/razorvine/c64emu/Screen.kt
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@ -12,7 +12,7 @@ import javax.swing.JPanel
* The rendering logic of the screen of the C64.
* It supports: Character mode,
* High res bitmap mode (320*200), Multicolor bitmap mode (160*200).
* TODO: sprites. Multicolor character mode. Extended background color mode.
* TODO: Multicolor character mode. Extended background color mode. Custom charsets.
*/
internal class Screen(private val chargenData: ByteArray, val ram: MemoryComponent) : JPanel() {
@ -111,54 +111,50 @@ internal class Screen(private val chargenData: ByteArray, val ram: MemoryCompone
}
private fun renderSprites(vicBank: Address) {
val pixels: IntArray = (fullscreenImage.raster.dataBuffer as DataBufferInt).data
// TODO sprite-background priorities
// TODO multicolor sprites
val spriteImage = fullscreenG2d.deviceConfiguration.createCompatibleImage(24, 21, Transparency.TRANSLUCENT)
val spriteGfx = spriteImage.graphics
spriteGfx.color = Color(255, 255, 255, 0)
val spritePixels = (spriteImage.raster.dataBuffer as DataBufferInt).data
val vicSPENA = ram[0xd015].toInt()
val vicXXPAND = ram[0xd01d].toInt()
val vicYXPAND = ram[0xd017].toInt()
for (i in 7 downTo 0) {
val bit = 1 shl i
if (vicSPENA and bit != 0) renderSprite(pixels, vicBank, i, vicXXPAND and bit != 0, vicYXPAND and bit != 0)
}
}
private fun renderSprite(pixels: IntArray, vicBank: Address, sprite: Int, expandX: Boolean, expandY: Boolean) {
val mx = ram[0xd010].toInt() and (1 shl sprite) != 0
var xstart = ram[0xd000+sprite*2].toInt()+if (mx) 256 else 0
var ystart = ram[0xd001+sprite*2].toInt()
if (xstart == 0 || xstart > 343 || ystart < 30 || ystart > 249) return
ystart -= 50
xstart -= 24
val sprptr = ram[vicBank+2040+sprite]*64
val color = ScreenDefs.colorPalette[ram[0xd027+sprite]].rgb
val offset = ScreenDefs.BORDER_SIZE+ScreenDefs.BORDER_SIZE*fullscreenImage.width+xstart+ystart*fullscreenImage.width
for (i in 0..62) {
val bits = ram[sprptr+i].toInt()
val x = (i%3)*if (expandX) 16 else 8
val y = (i/3)*if (expandY) 2 else 1
val pixOffset = offset+x+y*fullscreenImage.width
if (pixOffset < 0 || pixOffset >= pixels.size-fullscreenImage.width) break
if (expandX) {
for (px in 0..7) {
if (bits and (0b10000000 ushr px) != 0) {
pixels[pixOffset+px*2] = color
pixels[pixOffset+1+px*2] = color
if (expandY) {
pixels[pixOffset+fullscreenImage.width+px*2] = color
pixels[pixOffset+1+fullscreenImage.width+px*2] = color
}
}
}
} else {
for (px in 0..7) {
if (bits and (0b10000000 ushr px) != 0) {
pixels[pixOffset+px] = color
if (expandY) pixels[pixOffset+fullscreenImage.width+px] = color
}
for (sprite in 7 downTo 0) {
val bit = 1 shl sprite
if (vicSPENA and bit != 0) {
val mx = ram[0xd010].toInt() and (1 shl sprite) != 0
val xpos = ram[0xd000+sprite*2].toInt()+if (mx) 256 else 0
val ypos = ram[0xd001+sprite*2].toInt()
if(xpos in 1..343 && ypos in 30..249) {
spriteGfx.fillRect(0, 0, 24, 21)
renderSprite(sprite, spritePixels, vicBank)
fullscreenG2d.drawImage(spriteImage,
xpos+ScreenDefs.BORDER_SIZE-24,
ypos+ScreenDefs.BORDER_SIZE-50,
if(vicXXPAND and bit == 0) 24 else 48,
if(vicYXPAND and bit == 0) 21 else 42,
null)
}
}
}
// TODO multicolor sprites
// TODO sprite-background priorities
}
private fun renderSprite(sprite: Int, spritePixels: IntArray, vicBank: Address) {
// note: the sprite pixels must all have been cleared to transparency already
val sprptr = ram[vicBank+2040+sprite]*64
val color = ScreenDefs.colorPalette[ram[0xd027+sprite]].rgb
for (i in spritePixels.indices step 8) {
val bits = ram[sprptr+i/8].toInt()
if (bits and 0b10000000 != 0) spritePixels[i] = color
if (bits and 0b01000000 != 0) spritePixels[i+1] = color
if (bits and 0b00100000 != 0) spritePixels[i+2] = color
if (bits and 0b00010000 != 0) spritePixels[i+3] = color
if (bits and 0b00001000 != 0) spritePixels[i+4] = color
if (bits and 0b00000100 != 0) spritePixels[i+5] = color
if (bits and 0b00000010 != 0) spritePixels[i+6] = color
if (bits and 0b00000001 != 0) spritePixels[i+7] = color
}
}
private fun renderCharacterMode(vicBank: Address, vicVMCSB: Int, multiColorMode: Boolean) {