diff options
Diffstat (limited to 'src/jogl/classes/com/jogamp/opengl/util/texture')
| -rw-r--r-- | src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java | 2 | ||||
| -rw-r--r-- | src/jogl/classes/com/jogamp/opengl/util/texture/spi/PNGImage.java | 121 |
2 files changed, 88 insertions, 35 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java index 0b0af5625..14ceb6421 100644 --- a/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java +++ b/src/jogl/classes/com/jogamp/opengl/util/texture/TextureIO.java @@ -1408,7 +1408,7 @@ public class TextureIO { buf.rewind(); PNGImage image = PNGImage.createFromData(data.getWidth(), data.getHeight(), -1f, -1f, - bytesPerPixel, reversedChannels, buf); + bytesPerPixel, reversedChannels, !data.getMustFlipVertically(), buf); image.write(file, true); return true; } diff --git a/src/jogl/classes/com/jogamp/opengl/util/texture/spi/PNGImage.java b/src/jogl/classes/com/jogamp/opengl/util/texture/spi/PNGImage.java index 847451b41..b4b00e744 100644 --- a/src/jogl/classes/com/jogamp/opengl/util/texture/spi/PNGImage.java +++ b/src/jogl/classes/com/jogamp/opengl/util/texture/spi/PNGImage.java @@ -53,20 +53,39 @@ import com.jogamp.common.util.IOUtil; public class PNGImage { private static final boolean DEBUG = Debug.debug("PNGImage"); - /** Creates a PNGImage from data supplied by the end user. Shares - data with the passed ByteBuffer. Assumes the data is already in - the correct byte order for writing to disk, i.e., LUMINANCE, RGB or RGBA bottom-to-top (OpenGL coord). */ + /** + * Creates a PNGImage from data supplied by the end user. Shares + * data with the passed ByteBuffer. Assumes the data is already in + * the correct byte order for writing to disk, i.e., LUMINANCE, RGB or RGBA. + * Orientation is <i>bottom-to-top</i> (OpenGL coord. default) + * or <i>top-to-bottom</i> depending on <code>isGLOriented</code>. + * + * @param width + * @param height + * @param dpiX + * @param dpiY + * @param bytesPerPixel + * @param reversedChannels + * @param isGLOriented see {@link #isGLOriented()}. + * @param data + * @return + */ public static PNGImage createFromData(int width, int height, double dpiX, double dpiY, - int bytesPerPixel, boolean reversedChannels, ByteBuffer data) { - return new PNGImage(width, height, dpiX, dpiY, bytesPerPixel, reversedChannels, data); + int bytesPerPixel, boolean reversedChannels, boolean isGLOriented, ByteBuffer data) { + return new PNGImage(width, height, dpiX, dpiY, bytesPerPixel, reversedChannels, isGLOriented, data); } - /** Reads a PNG image from the specified InputStream. */ + /** + * Reads a PNG image from the specified InputStream. + * <p> + * Implicitly flip image to GL orientation, see {@link #isGLOriented()}. + * </p> + */ public static PNGImage read(InputStream in) throws IOException { return new PNGImage(in); } - /** Reverse read and store, implicitly flip image to GL coords. */ + /** Reverse read and store, implicitly flip image to GL orientation, see {@link #isGLOriented()}. */ private static final int getPixelRGBA8(ByteBuffer d, int dOff, int[] scanline, int lineOff, boolean hasAlpha) { if(hasAlpha) { d.put(dOff--, (byte)scanline[lineOff + 3]); // A @@ -76,27 +95,28 @@ public class PNGImage { d.put(dOff--, (byte)scanline[lineOff ]); // R return dOff; } - /** Reverse read and store, implicitly flip image from GL coords. Handle reversed channels (BGR[A])*/ - private static int setPixelRGBA8(ImageLine line, int lineOff, ByteBuffer d, int dOff, boolean hasAlpha, boolean reversedChannels) { - if(reversedChannels) { - line.scanline[lineOff ] = d.get(dOff--); // R, A - line.scanline[lineOff + 1] = d.get(dOff--); // G, B - line.scanline[lineOff + 2] = d.get(dOff--); // B, G + + /** Reverse write and store, implicitly flip image from current orientation, see {@link #isGLOriented()}. Handle reversed channels (BGR[A]). */ + private int setPixelRGBA8(ImageLine line, int lineOff, ByteBuffer d, int dOff, boolean hasAlpha) { + if( reversedChannels ) { if(hasAlpha) { - line.scanline[lineOff + 3] = d.get(dOff--);// R + line.scanline[lineOff + 3] = d.get(dOff++); // A } + line.scanline[lineOff + 2] = d.get(dOff++); // R + line.scanline[lineOff + 1] = d.get(dOff++); // G + line.scanline[lineOff ] = d.get(dOff++); // B } else { + line.scanline[lineOff ] = d.get(dOff++); // R + line.scanline[lineOff + 1] = d.get(dOff++); // G + line.scanline[lineOff + 2] = d.get(dOff++); // B if(hasAlpha) { - line.scanline[lineOff + 3] = d.get(dOff--); // A + line.scanline[lineOff + 3] = d.get(dOff++); // A } - line.scanline[lineOff + 2] = d.get(dOff--); // B - line.scanline[lineOff + 1] = d.get(dOff--); // G - line.scanline[lineOff ] = d.get(dOff--); // R } - return dOff; + return isGLOriented ? dOff - bytesPerPixel - bytesPerPixel : dOff; } - private PNGImage(int width, int height, double dpiX, double dpiY, int bytesPerPixel, boolean reversedChannels, ByteBuffer data) { + private PNGImage(int width, int height, double dpiX, double dpiY, int bytesPerPixel, boolean reversedChannels, boolean isGLOriented, ByteBuffer data) { pixelWidth=width; pixelHeight=height; dpi = new double[] { dpiX, dpiY }; @@ -109,6 +129,7 @@ public class PNGImage { } this.bytesPerPixel = bytesPerPixel; this.reversedChannels = reversedChannels; + this.isGLOriented = isGLOriented; this.data = data; } @@ -162,13 +183,14 @@ public class PNGImage { data = Buffers.newDirectByteBuffer(bytesPerPixel * pixelWidth * pixelHeight); reversedChannels = false; // RGB[A] + isGLOriented = true; int dataOff = bytesPerPixel * pixelWidth * pixelHeight - 1; // start at end-of-buffer, reverse store int[] rgbaScanline = indexed ? new int[imgInfo.cols * channels] : null; for (int row = 0; row < pixelHeight; row++) { final ImageLine l1 = pngr.readRow(row); - int lineOff = ( pixelWidth - 1 ) * bytesPerPixel ; // start w/ last pixel in line, reverse read + int lineOff = ( pixelWidth - 1 ) * bytesPerPixel ; // start w/ last pixel in line, reverse read (PNG top-left -> OpenGL bottom-left origin) if( indexed ) { for (int j = pixelWidth - 1; j >= 0; j--) { rgbaScanline = ImageLineHelper.palette2rgb(l1, plte, trns, rgbaScanline); // reuse rgbaScanline and update if resized @@ -189,7 +211,8 @@ public class PNGImage { pngr.end(); } private final int pixelWidth, pixelHeight, glFormat, bytesPerPixel; - private boolean reversedChannels; + private final boolean reversedChannels; + private final boolean isGLOriented; private final double[] dpi; private final ByteBuffer data; @@ -202,6 +225,16 @@ public class PNGImage { /** Returns true if data has the channels reversed to BGR or BGRA, otherwise RGB or RGBA is expected. */ public boolean getHasReversedChannels() { return reversedChannels; } + /** + * Returns <code>true</code> if the drawable is rendered in + * OpenGL's coordinate system, <i>origin at bottom left</i>. + * Otherwise returns <code>false</code>, i.e. <i>origin at top left</i>. + * <p> + * Default impl. is <code>true</code>, i.e. OpenGL coordinate system. + * </p> + */ + public boolean isGLOriented() { return isGLOriented; } + /** Returns the dpi of the image. */ public double[] getDpi() { return dpi; } @@ -231,20 +264,40 @@ public class PNGImage { // png.getMetadata().setText("my key", "my text"); final boolean hasAlpha = 4 == bytesPerPixel; final ImageLine l1 = new ImageLine(imi); - int dataOff = bytesPerPixel * pixelWidth * pixelHeight - 1; // start at end-of-buffer, reverse read - for (int row = 0; row < pixelHeight; row++) { - int lineOff = ( pixelWidth - 1 ) * bytesPerPixel ; // start w/ last pixel in line, reverse store - if(1 == bytesPerPixel) { - for (int j = pixelWidth - 1; j >= 0; j--) { - l1.scanline[lineOff--] = data.get(dataOff--); // // Luminance, 1 bytesPerPixel - } - } else { - for (int j = pixelWidth - 1; j >= 0; j--) { - dataOff = setPixelRGBA8(l1, lineOff, data, dataOff, hasAlpha, reversedChannels); - lineOff -= bytesPerPixel; + if( isGLOriented ) { + // start at last pixel at end-of-buffer, reverse read (OpenGL bottom-left -> PNG top-left origin) + int dataOff = ( pixelWidth * bytesPerPixel * ( pixelHeight - 1 ) ) + // full lines - 1 line + ( ( pixelWidth - 1 ) * bytesPerPixel ); // one line - 1 pixel + for (int row = 0; row < pixelHeight; row++) { + int lineOff = ( pixelWidth - 1 ) * bytesPerPixel ; // start w/ last pixel in line, reverse store (OpenGL bottom-left -> PNG top-left origin) + if(1 == bytesPerPixel) { + for (int j = pixelWidth - 1; j >= 0; j--) { + l1.scanline[lineOff--] = data.get(dataOff--); // // Luminance, 1 bytesPerPixel + } + } else { + for (int j = pixelWidth - 1; j >= 0; j--) { + dataOff = setPixelRGBA8(l1, lineOff, data, dataOff, hasAlpha); + lineOff -= bytesPerPixel; + } } + png.writeRow(l1, row); } - png.writeRow(l1, row); + } else { + int dataOff = 0; // start at first pixel at start-of-buffer, normal read (same origin: top-left) + for (int row = 0; row < pixelHeight; row++) { + int lineOff = 0; // start w/ first pixel in line, normal store (same origin: top-left) + if(1 == bytesPerPixel) { + for (int j = pixelWidth - 1; j >= 0; j--) { + l1.scanline[lineOff++] = data.get(dataOff++); // // Luminance, 1 bytesPerPixel + } + } else { + for (int j = pixelWidth - 1; j >= 0; j--) { + dataOff = setPixelRGBA8(l1, lineOff, data, dataOff, hasAlpha); + lineOff += bytesPerPixel; + } + } + png.writeRow(l1, row); + } } png.end(); } finally { |