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Clean up of hires dithering routines and logic, removal of the vertical lines. HGR still looks like HGR though. :-/

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This commit is contained in:
Brendan Robert 2014-09-30 02:03:05 -05:00
parent a5f4117d68
commit 429c4418e4
1 changed files with 42 additions and 35 deletions
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77
OutlawEditor/src/main/java/org/badvision/outlaweditor/apple/ImageDitherEngine.java
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@ -49,7 +49,7 @@ public class ImageDitherEngine {
int byteRenderWidth;
final int errorWindow = 6;
final int overlap = 2;
final int pixelShift = -2;
final int pixelShift = -3;
WritableImage source;
byte[] screen;
Platform platform;
@ -106,13 +106,15 @@ public class ImageDitherEngine {
}
WritableImage keepScaled;
WritableImage tmpScaled;
WritableImage tmpScaled1;
WritableImage tmpScaled2;
int[] scanline;
List<Integer> pixels;
public byte[] restartDither(int value) {
keepScaled = new WritableImage(source.getPixelReader(), 560, 192);
tmpScaled = new WritableImage(source.getPixelReader(), 560, 192);
tmpScaled1 = new WritableImage(source.getPixelReader(), 560, 192);
tmpScaled2 = new WritableImage(source.getPixelReader(), 560, 192);
for (int i = 0; i < screen.length; i++) {
screen[i] = (byte) (value >= 0 ? value : (int) Math.floor(Math.random() * 256.0));
}
@ -131,15 +133,16 @@ public class ImageDitherEngine {
resetOutput = false;
}
keepScaled.getPixelWriter().setPixels(0, 0, 560, 192, source.getPixelReader(), 0, 0);
tmpScaled.getPixelWriter().setPixels(0, 0, 560, 192, source.getPixelReader(), 0, 0);
tmpScaled1.getPixelWriter().setPixels(0, 0, 560, 192, source.getPixelReader(), 0, 0);
tmpScaled2.getPixelWriter().setPixels(0, 0, 560, 192, source.getPixelReader(), 0, 0);
for (int y = 0; y < height; y++) {
for (int x = 0; x < bufferWidth; x += 2) {
switch (platform) {
case AppleII:
hiresDither(y, x, propagateError, keepScaled);
hiresDither(y, x, propagateError);
break;
case AppleII_DHGR:
doubleHiresDither(y, x, propagateError, keepScaled);
doubleHiresDither(y, x, propagateError);
break;
}
}
@ -147,7 +150,7 @@ public class ImageDitherEngine {
return screen;
}
void hiresDither(int y, int x, boolean propagateError, final WritableImage keepScaled) {
void hiresDither(int y, int x, boolean propagateError) {
int bb1 = screen[(y + startY) * bufferWidth + startX + x] & 255;
int bb2 = screen[(y + startY) * bufferWidth + startX + x + 1] & 255;
int next = bb2 & 127; // Preserve hi-bit so last pixel stays solid, it is a very minor detail
@ -169,20 +172,20 @@ public class ImageDitherEngine {
int off = on ^ (1 << c);
// get values for "off"
int i = hgrToDhgr[0][prev];
scanline[0] = i & 0x0fffffff;
i = hgrToDhgr[(i & 0x10000000) != 0 ? off | 0x0100 : off][bb2];
scanline[1] = i & 0x0fffffff;
scanline[0] = i;
i = hgrToDhgr[(i & 0x010000000) >> 20 | off][bb2];
scanline[1] = i;
// scanline[2] = hgrToDhgr[(i & 0x10000000) != 0 ? next | 0x0100 : next][0] & 0x0fffffff;
int errorOff = getError(x * 14 - overlap + c * 2, y, 28 + c * 2 - overlap + pixelShift, errorWindow, pixels, tmpScaled.getPixelReader(), scanline);
int errorOff = getError(x * 14 - overlap + c * 2, y, 28 + c * 2 - overlap + pixelShift, errorWindow, pixels, tmpScaled2.getPixelReader(), scanline);
int off1 = pixels.get(c * 2 + 28 + pixelShift);
int off2 = pixels.get(c * 2 + 29 + pixelShift);
// get values for "on"
i = hgrToDhgr[0][prev];
scanline[0] = i & 0x0fffffff;
i = hgrToDhgr[(i & 0x10000000) != 0 ? on | 0x0100 : on][bb2];
scanline[1] = i & 0x0fffffff;
scanline[0] = i;
i = hgrToDhgr[(i & 0x010000000) >> 20 | on][bb2];
scanline[1] = i;
// scanline[2] = hgrToDhgr[(i & 0x10000000) != 0 ? next | 0x0100 : next][0] & 0x0fffffff;
int errorOn = getError(x * 14 - overlap + c * 2, y, 28 + c * 2 - overlap + pixelShift, errorWindow, pixels, tmpScaled.getPixelReader(), scanline);
int errorOn = getError(x * 14 - overlap + c * 2, y, 28 + c * 2 - overlap + pixelShift, errorWindow, pixels, tmpScaled2.getPixelReader(), scanline);
int on1 = pixels.get(c * 2 + 28 + pixelShift);
int on2 = pixels.get(c * 2 + 29 + pixelShift);
int[] col1;
@ -199,18 +202,19 @@ public class ImageDitherEngine {
col2 = Palette.parseIntColor(on2);
}
if (propagateError) {
propagateError(x * 14 + c * 2, y, tmpScaled, col1);
propagateError(x * 14 + c * 2 + 1, y, tmpScaled, col2);
propagateError(x * 14 + c * 2 + pixelShift, y, tmpScaled2, col1);
propagateError(x * 14 + c * 2 + pixelShift, y, tmpScaled2, col2);
}
}
if (totalError < leastError) {
keepScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled.getPixelReader(), 0, y);
tmpScaled1.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled2.getPixelReader(), 0, y);
leastError = totalError;
bb1 = b1;
} else {
tmpScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, keepScaled.getPixelReader(), 0, y);
tmpScaled2.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, keepScaled.getPixelReader(), 0, y);
}
}
keepScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled1.getPixelReader(), 0, y);
// Second byte, compared with a sliding window encompassing the next byte, if any.
leastError = Integer.MAX_VALUE;
for (int hi = 0; hi < 2; hi++) {
@ -222,16 +226,17 @@ public class ImageDitherEngine {
int off = on ^ (1 << c);
// get values for "off"
int i = hgrToDhgr[bb1][off];
scanline[0] = i & 0xfffffff;
scanline[1] = hgrToDhgr[(i & 0x10000000) != 0 ? next | 0x0100 : next][0];
int errorOff = getError(x * 14 + 14 - overlap + c * 2, y, 14 - overlap + c * 2 + pixelShift, errorWindow, pixels, tmpScaled.getPixelReader(), scanline);
scanline[0] = i;
scanline[1] = hgrToDhgr[(i & 0x010000000) >> 20 | next][0];
// int errorOff = getError(x * 14 - overlap + c * 2, y, 28 + c * 2 - overlap + pixelShift, errorWindow, pixels, tmpScaled2.getPixelReader(), scanline);
int errorOff = getError(x * 14 + 14 - overlap + c * 2, y, 14 + c * 2 - overlap + pixelShift, errorWindow, pixels, tmpScaled2.getPixelReader(), scanline);
int off1 = pixels.get(c * 2 + 14 + pixelShift);
int off2 = pixels.get(c * 2 + 15 + pixelShift);
// get values for "on"
i = hgrToDhgr[bb1][on];
scanline[0] = i & 0xfffffff;
scanline[1] = hgrToDhgr[(i & 0x10000000) != 0 ? next | 0x0100 : next][0];
int errorOn = getError(x * 14 + 14 - overlap + c * 2, y, 14 - overlap + c * 2 + pixelShift, errorWindow, pixels, tmpScaled.getPixelReader(), scanline);
scanline[0] = i;
scanline[1] = hgrToDhgr[(i & 0x010000000) >> 20 | next][0];
int errorOn = getError(x * 14 + 14 - overlap + c * 2, y, 14 + c * 2 - overlap + pixelShift, errorWindow, pixels, tmpScaled2.getPixelReader(), scanline);
int on1 = pixels.get(c * 2 + 14 + pixelShift);
int on2 = pixels.get(c * 2 + 15 + pixelShift);
int[] col1;
@ -248,23 +253,24 @@ public class ImageDitherEngine {
col2 = Palette.parseIntColor(on2);
}
if (propagateError) {
propagateError(x * 14 + c * 2 + 14, y, tmpScaled, col1);
propagateError(x * 14 + c * 2 + 15, y, tmpScaled, col2);
propagateError(x * 14 + c * 2 + 14 + pixelShift, y, tmpScaled2, col1);
propagateError(x * 14 + c * 2 + 15 + pixelShift, y, tmpScaled2, col2);
}
}
if (totalError < leastError) {
keepScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled.getPixelReader(), 0, y);
tmpScaled1.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled2.getPixelReader(), 0, y);
leastError = totalError;
bb2 = b2;
} else {
tmpScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, keepScaled.getPixelReader(), 0, y);
tmpScaled2.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, keepScaled.getPixelReader(), 0, y);
}
}
keepScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled1.getPixelReader(), 0, y);
screen[(y + startY) * bufferWidth + startX + x] = (byte) bb1;
screen[(y + startY) * bufferWidth + startX + x + 1] = (byte) bb2;
}
void doubleHiresDither(int y, int x, boolean propagateError, final WritableImage keepScaled) {
void doubleHiresDither(int y, int x, boolean propagateError) {
if (x % 4 != 0) {
return;
}
@ -299,7 +305,7 @@ public class ImageDitherEngine {
i <<= 7;
i |= (byteOffset == 0) ? off : bytes[0] & 255;
scanline[1] = i;
int errorOff = getError((x + byteOffset) * 7 - overlap + bit, y, 28 + (byteOffset * 7) + bit - overlap + pixelShift, errorWindow, pixels, tmpScaled.getPixelReader(), scanline);
int errorOff = getError((x + byteOffset) * 7 - overlap + bit, y, 28 + (byteOffset * 7) + bit - overlap + pixelShift, errorWindow, pixels, tmpScaled1.getPixelReader(), scanline);
int off1 = pixels.get(byteOffset * 7 + bit + 28 + pixelShift);
// get values for "on"
i = (byteOffset == 3) ? on : bytes[3] & 255;
@ -310,7 +316,7 @@ public class ImageDitherEngine {
i <<= 7;
i |= (byteOffset == 0) ? on : bytes[0] & 255;
scanline[1] = i;
int errorOn = getError((x + byteOffset) * 7 - overlap + bit, y, 28 + (byteOffset * 7) + bit - overlap + pixelShift, errorWindow, pixels, tmpScaled.getPixelReader(), scanline);
int errorOn = getError((x + byteOffset) * 7 - overlap + bit, y, 28 + (byteOffset * 7) + bit - overlap + pixelShift, errorWindow, pixels, tmpScaled1.getPixelReader(), scanline);
int on1 = pixels.get(byteOffset * 7 + bit + 28 + pixelShift);
int[] col1;
@ -322,10 +328,10 @@ public class ImageDitherEngine {
col1 = Palette.parseIntColor(on1);
}
if (propagateError) {
propagateError((x + byteOffset) * 7 + bit, y, tmpScaled, col1);
propagateError((x + byteOffset) * 7 + bit, y, tmpScaled1, col1);
}
}
keepScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled.getPixelReader(), 0, y);
keepScaled.getPixelWriter().setPixels(0, y, 560, (y < 190) ? 3 : (y < 191) ? 2 : 1, tmpScaled1.getPixelReader(), 0, y);
bytes[byteOffset] = b1;
screen[(y + startY) * bufferWidth + startX + x] = (byte) bytes[0];
screen[(y + startY) * bufferWidth + startX + x + 1] = (byte) bytes[1];
@ -337,6 +343,7 @@ public class ImageDitherEngine {
public static int ALPHA_SOLID = 255 << 24;
private void propagateError(int x, int y, WritableImage img, int[] newColor) {
if (x < 0 || y < 0) return;
for (int i = 0; i < 3; i++) {
int error = Palette.getComponent(img.getPixelReader().getArgb(x, y), i) - newColor[i];
for (int yy = 0; yy < 3 && y + yy < img.getHeight(); yy++) {
@ -391,7 +398,7 @@ public class ImageDitherEngine {
double total = 0;
// List<Double> err = new ArrayList<>();
for (int p = 0; p < window; p++) {
if ((imageXStart + p) < 0 || (imageXStart + p) >= 560) {
if ((imageXStart + p) < 0 || (imageXStart + p) >= 560 || scanlineXStart + p < 0) {
continue;
}
int[] c1 = Palette.parseIntColor(pixels.get(scanlineXStart + p));