diff options
Diffstat (limited to 'demos/java/gsviewer/src/com/artifex/gsviewer/Document.java')
| -rw-r--r-- | demos/java/gsviewer/src/com/artifex/gsviewer/Document.java | 137 |
1 files changed, 105 insertions, 32 deletions
diff --git a/demos/java/gsviewer/src/com/artifex/gsviewer/Document.java b/demos/java/gsviewer/src/com/artifex/gsviewer/Document.java index 80e14333b..d147656ba 100644 --- a/demos/java/gsviewer/src/com/artifex/gsviewer/Document.java +++ b/demos/java/gsviewer/src/com/artifex/gsviewer/Document.java @@ -15,9 +15,11 @@ import java.util.Objects; import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.ReentrantLock; +import com.artifex.gsjava.GSAPI; import com.artifex.gsjava.GSInstance; import com.artifex.gsjava.callbacks.DisplayCallback; import com.artifex.gsjava.util.BytePointer; +import com.artifex.gsjava.util.Reference; import com.artifex.gsviewer.ImageUtil.ImageParams; /** @@ -297,32 +299,6 @@ public class Document implements List<Page> { } } - /** - * Initializes an instance of Ghostcript. - * - * @param instanceRef A reference to the instance of Ghostscript. - * @throws IllegalStateException When any Ghostscript operation fails to execute. - */ -// private static void initDocInstance(LongReference instanceRef) throws IllegalStateException { -// int code = gsapi_new_instance(instanceRef, GS_NULL); -// if (code != GS_ERROR_OK) { -// gsapi_delete_instance(instanceRef.value); -// throw new IllegalStateException("Failed to set stdio with handle (code = " + code + ")"); -// } -// -// code = gsapi_set_arg_encoding(instanceRef.value, 1); -// if (code != GS_ERROR_OK) { -// gsapi_delete_instance(instanceRef.value); -// throw new IllegalArgumentException("Failed to set arg encoding (code = " + code + ")"); -// } -// -// code = gsapi_set_display_callback(instanceRef.value, documentLoader.reset()); -// if (code != GS_ERROR_OK) { -// gsapi_delete_instance(instanceRef.value); -// throw new IllegalStateException("Failed to set display callback code=" + code); -// } -// } - private static GSInstance initDocInstance() throws IllegalStateException { GSInstance instance = new GSInstance(); @@ -339,6 +315,19 @@ public class Document implements List<Page> { throw new IllegalStateException("Failed to set display callback (code = " + code + ")"); } + String[] gsargs = new String[] { + "gs", + "-dNOPAUSE", "-dSAFER", "-I%rom%Resource%/Init/", "-dBATCH", + "-sDEVICE=display", + "-dFirstPage=1", + "-dDisplayFormat=" + format + }; + code = instance.init_with_args(gsargs); + if (code != GS_ERROR_OK) { + instance.delete_instance(); + throw new IllegalStateException("Failed to init with args (code = " + code + ")"); + } + return instance; } @@ -371,8 +360,15 @@ public class Document implements List<Page> { } @Override + public int onDisplayPresize(long handle, long device, int width, int height, int raster, int format) { + System.out.println("Presize"); + return 0; + } + + @Override public int onDisplaySize(long handle, long device, int width, int height, int raster, int format, BytePointer pimage) { + System.out.println("Size"); this.pageWidth = width; this.pageHeight = height; this.pageRaster = raster; @@ -391,10 +387,16 @@ public class Document implements List<Page> { return 0; } + + @Override + public void finalize() { + System.err.println("WARNING: The document loader has been freed by the Java VM"); + } } private File file; private List<Page> pages; + private GSInstance gsInstance; /** * Creates and loads a new document. @@ -430,25 +432,46 @@ public class Document implements List<Page> { startOperation(); - GSInstance instance = null; try { - instance = initDocInstance(); + gsInstance = initDocInstance(); } catch (IllegalStateException e) { operationDone(); } - if (instance == null) + if (gsInstance == null) { + operationDone(); throw new IllegalStateException("Failed to initialize Ghostscript"); + } documentLoader.callback = loadCallback; - int code = instance.init_with_args(gargs); + int code = gsInstance.set_param("HWResolution", Page.PAGE_LOW_DPI_STR, GS_SPT_PARSED); + if (code != GS_ERROR_OK) { + operationDone(); + throw new IllegalStateException("Failed to set HWResolution (code = " + code + ")"); + } + + Reference<Integer> exitCode = new Reference<>(); + code = gsInstance.run_file(file.getAbsolutePath(), 0, exitCode); + + if (code != GS_ERROR_OK) { + operationDone(); + throw new IllegalStateException("Failed to run file (code = " + code + ")"); + } + + gsInstance.set_param("TextAlphaBits", 4, GS_SPT_INT); + gsInstance.set_param("GraphicsAlphaBits", 4, GS_SPT_INT); + + //gsInstance.exit(); + //gsInstance.delete_instance(); + + /*int code = instance.init_with_args(gargs); instance.exit(); instance.delete_instance(); if (code != GS_ERROR_OK) { operationDone(); throw new IllegalStateException("Failed to gsapi_init_with_args code=" + code); - } + }*/ this.pages = new ArrayList<>(documentLoader.images.size()); for (BufferedImage img : documentLoader.images) { @@ -565,7 +588,7 @@ public class Document implements List<Page> { "-dTextAlphaBits=4", "-dGraphicsAlphaBits=4", "-f", file.getAbsolutePath() }; - GSInstance instance = null; + /*GSInstance instance = null; try { instance = initDocInstance(); } catch (IllegalStateException e) { @@ -581,6 +604,36 @@ public class Document implements List<Page> { if (code != GS_ERROR_OK) { operationDone(); throw new IllegalStateException("Failed to gsapi_init_with_args code=" + code); + }*/ + //gsInstance.set_display_callback(documentLoader.reset()); + //documentLoader.reset(); + documentLoader.images.clear(); + + this.setParams(Page.PAGE_HIGH_DPI, startPage, endPage); + + for (GSInstance.GSParam<?> param : gsInstance) { + System.out.println(param); + } + + Reference<Integer> ref = new Reference<>(); + gsInstance.get_param_once("FirstPage", ref, GS_SPT_INT); + System.out.println(ref); + gsInstance.get_param_once("LastPage", ref, GS_SPT_INT); + System.out.println(ref); + + Reference<Integer> exitCode = new Reference<>(); + //gsInstance.set_display_callback(documentLoader.reset()); + int code = gsInstance.run_file(file.getAbsolutePath(), 0, exitCode); + + if (code != GS_ERROR_OK) { + operationDone(); + throw new IllegalStateException("Failed to run file (code = " + code + ")"); + } + + if (documentLoader.images.size() != endPage - startPage + 1) { + operationDone(); + throw new IllegalStateException("Page range mismatch (expected " + + (endPage - startPage) + ", got " + documentLoader.images.size() + ")"); } int ind = startPage - 1; @@ -847,6 +900,26 @@ public class Document implements List<Page> { throw new IndexOutOfBoundsException("end < start"); } + private void setParams(int dpi, int startPage, int lastPage) { + int code = gsInstance.set_param("HWResolution", Page.toDPIString(dpi), GS_SPT_PARSED); + if (code != GS_ERROR_OK) { + operationDone(); + throw new IllegalStateException("Failed to set HWResolution (code = " + code + ")"); + } + + code = gsInstance.set_param("FirstPage", startPage, GS_SPT_INT); + if (code != GS_ERROR_OK) { + operationDone(); + throw new IllegalStateException("Failed to set dFirstPage (code = " + code + ")"); + } + + code = gsInstance.set_param("LastPage", lastPage, GS_SPT_INT); + if (code != GS_ERROR_OK) { + operationDone(); + throw new IllegalStateException("Failed to set dEndPage (code = " + code + ")"); + } + } + // Implementations of inherited methods from java.util.List. @Override |