Initial commit.

1 files changed, 296 insertions, 0 deletions

diff --git a/core/src/fxcodec/libjpeg/fpdfapi_jcmainct.c b/core/src/fxcodec/libjpeg/fpdfapi_jcmainct.c
new file mode 100644
index 0000000000..25d61f2284
--- /dev/null
+++ b/core/src/fxcodec/libjpeg/fpdfapi_jcmainct.c
@@ -0,0 +1,296 @@
+#if !defined(_FX_JPEG_TURBO_)

+/*

+ * jcmainct.c

+ *

+ * Copyright (C) 1994-1996, Thomas G. Lane.

+ * This file is part of the Independent JPEG Group's software.

+ * For conditions of distribution and use, see the accompanying README file.

+ *

+ * This file contains the main buffer controller for compression.

+ * The main buffer lies between the pre-processor and the JPEG

+ * compressor proper; it holds downsampled data in the JPEG colorspace.

+ */

+

+#define JPEG_INTERNALS

+#include "jinclude.h"

+#include "jpeglib.h"

+

+

+/* Note: currently, there is no operating mode in which a full-image buffer

+ * is needed at this step.  If there were, that mode could not be used with

+ * "raw data" input, since this module is bypassed in that case.  However,

+ * we've left the code here for possible use in special applications.

+ */

+#undef FULL_MAIN_BUFFER_SUPPORTED

+

+

+/* Private buffer controller object */

+

+typedef struct {

+  struct jpeg_c_main_controller pub; /* public fields */

+

+  JDIMENSION cur_iMCU_row;	/* number of current iMCU row */

+  JDIMENSION rowgroup_ctr;	/* counts row groups received in iMCU row */

+  boolean suspended;		/* remember if we suspended output */

+  J_BUF_MODE pass_mode;		/* current operating mode */

+

+  /* If using just a strip buffer, this points to the entire set of buffers

+   * (we allocate one for each component).  In the full-image case, this

+   * points to the currently accessible strips of the virtual arrays.

+   */

+  JSAMPARRAY buffer[MAX_COMPONENTS];

+

+#ifdef FULL_MAIN_BUFFER_SUPPORTED

+  /* If using full-image storage, this array holds pointers to virtual-array

+   * control blocks for each component.  Unused if not full-image storage.

+   */

+  jvirt_sarray_ptr whole_image[MAX_COMPONENTS];

+#endif

+} my_main_controller;

+

+typedef my_main_controller * my_main_ptr;

+

+

+/* Forward declarations */

+METHODDEF(void) process_data_simple_main

+	JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,

+	     JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));

+#ifdef FULL_MAIN_BUFFER_SUPPORTED

+METHODDEF(void) process_data_buffer_main

+	JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,

+	     JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));

+#endif

+

+

+/*

+ * Initialize for a processing pass.

+ */

+

+METHODDEF(void)

+start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode)

+{

+  my_main_ptr main = (my_main_ptr) cinfo->main;

+

+  /* Do nothing in raw-data mode. */

+  if (cinfo->raw_data_in)

+    return;

+

+  main->cur_iMCU_row = 0;	/* initialize counters */

+  main->rowgroup_ctr = 0;

+  main->suspended = FALSE;

+  main->pass_mode = pass_mode;	/* save mode for use by process_data */

+

+  switch (pass_mode) {

+  case JBUF_PASS_THRU:

+#ifdef FULL_MAIN_BUFFER_SUPPORTED

+    if (main->whole_image[0] != NULL)

+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);

+#endif

+    main->pub.process_data = process_data_simple_main;

+    break;

+#ifdef FULL_MAIN_BUFFER_SUPPORTED

+  case JBUF_SAVE_SOURCE:

+  case JBUF_CRANK_DEST:

+  case JBUF_SAVE_AND_PASS:

+    if (main->whole_image[0] == NULL)

+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);

+    main->pub.process_data = process_data_buffer_main;

+    break;

+#endif

+  default:

+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);

+    break;

+  }

+}

+

+

+/*

+ * Process some data.

+ * This routine handles the simple pass-through mode,

+ * where we have only a strip buffer.

+ */

+

+METHODDEF(void)

+process_data_simple_main (j_compress_ptr cinfo,

+			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,

+			  JDIMENSION in_rows_avail)

+{

+  my_main_ptr main = (my_main_ptr) cinfo->main;

+

+  while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {

+    /* Read input data if we haven't filled the main buffer yet */

+    if (main->rowgroup_ctr < DCTSIZE)

+      (*cinfo->prep->pre_process_data) (cinfo,

+					input_buf, in_row_ctr, in_rows_avail,

+					main->buffer, &main->rowgroup_ctr,

+					(JDIMENSION) DCTSIZE);

+

+    /* If we don't have a full iMCU row buffered, return to application for

+     * more data.  Note that preprocessor will always pad to fill the iMCU row

+     * at the bottom of the image.

+     */

+    if (main->rowgroup_ctr != DCTSIZE)

+      return;

+

+    /* Send the completed row to the compressor */

+    if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {

+      /* If compressor did not consume the whole row, then we must need to

+       * suspend processing and return to the application.  In this situation

+       * we pretend we didn't yet consume the last input row; otherwise, if

+       * it happened to be the last row of the image, the application would

+       * think we were done.

+       */

+      if (! main->suspended) {

+	(*in_row_ctr)--;

+	main->suspended = TRUE;

+      }

+      return;

+    }

+    /* We did finish the row.  Undo our little suspension hack if a previous

+     * call suspended; then mark the main buffer empty.

+     */

+    if (main->suspended) {

+      (*in_row_ctr)++;

+      main->suspended = FALSE;

+    }

+    main->rowgroup_ctr = 0;

+    main->cur_iMCU_row++;

+  }

+}

+

+

+#ifdef FULL_MAIN_BUFFER_SUPPORTED

+

+/*

+ * Process some data.

+ * This routine handles all of the modes that use a full-size buffer.

+ */

+

+METHODDEF(void)

+process_data_buffer_main (j_compress_ptr cinfo,

+			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,

+			  JDIMENSION in_rows_avail)

+{

+  my_main_ptr main = (my_main_ptr) cinfo->main;

+  int ci;

+  jpeg_component_info *compptr;

+  boolean writing = (main->pass_mode != JBUF_CRANK_DEST);

+

+  while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {

+    /* Realign the virtual buffers if at the start of an iMCU row. */

+    if (main->rowgroup_ctr == 0) {

+      for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;

+	   ci++, compptr++) {

+	main->buffer[ci] = (*cinfo->mem->access_virt_sarray)

+	  ((j_common_ptr) cinfo, main->whole_image[ci],

+	   main->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),

+	   (JDIMENSION) (compptr->v_samp_factor * DCTSIZE), writing);

+      }

+      /* In a read pass, pretend we just read some source data. */

+      if (! writing) {

+	*in_row_ctr += cinfo->max_v_samp_factor * DCTSIZE;

+	main->rowgroup_ctr = DCTSIZE;

+      }

+    }

+

+    /* If a write pass, read input data until the current iMCU row is full. */

+    /* Note: preprocessor will pad if necessary to fill the last iMCU row. */

+    if (writing) {

+      (*cinfo->prep->pre_process_data) (cinfo,

+					input_buf, in_row_ctr, in_rows_avail,

+					main->buffer, &main->rowgroup_ctr,

+					(JDIMENSION) DCTSIZE);

+      /* Return to application if we need more data to fill the iMCU row. */

+      if (main->rowgroup_ctr < DCTSIZE)

+	return;

+    }

+

+    /* Emit data, unless this is a sink-only pass. */

+    if (main->pass_mode != JBUF_SAVE_SOURCE) {

+      if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {

+	/* If compressor did not consume the whole row, then we must need to

+	 * suspend processing and return to the application.  In this situation

+	 * we pretend we didn't yet consume the last input row; otherwise, if

+	 * it happened to be the last row of the image, the application would

+	 * think we were done.

+	 */

+	if (! main->suspended) {

+	  (*in_row_ctr)--;

+	  main->suspended = TRUE;

+	}

+	return;

+      }

+      /* We did finish the row.  Undo our little suspension hack if a previous

+       * call suspended; then mark the main buffer empty.

+       */

+      if (main->suspended) {

+	(*in_row_ctr)++;

+	main->suspended = FALSE;

+      }

+    }

+

+    /* If get here, we are done with this iMCU row.  Mark buffer empty. */

+    main->rowgroup_ctr = 0;

+    main->cur_iMCU_row++;

+  }

+}

+

+#endif /* FULL_MAIN_BUFFER_SUPPORTED */

+

+

+/*

+ * Initialize main buffer controller.

+ */

+

+GLOBAL(void)

+jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer)

+{

+  my_main_ptr main;

+  int ci;

+  jpeg_component_info *compptr;

+

+  main = (my_main_ptr)

+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,

+				SIZEOF(my_main_controller));

+  cinfo->main = (struct jpeg_c_main_controller *) main;

+  main->pub.start_pass = start_pass_main;

+

+  /* We don't need to create a buffer in raw-data mode. */

+  if (cinfo->raw_data_in)

+    return;

+

+  /* Create the buffer.  It holds downsampled data, so each component

+   * may be of a different size.

+   */

+  if (need_full_buffer) {

+#ifdef FULL_MAIN_BUFFER_SUPPORTED

+    /* Allocate a full-image virtual array for each component */

+    /* Note we pad the bottom to a multiple of the iMCU height */

+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;

+	 ci++, compptr++) {

+      main->whole_image[ci] = (*cinfo->mem->request_virt_sarray)

+	((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,

+	 compptr->width_in_blocks * DCTSIZE,

+	 (JDIMENSION) jround_up((long) compptr->height_in_blocks,

+				(long) compptr->v_samp_factor) * DCTSIZE,

+	 (JDIMENSION) (compptr->v_samp_factor * DCTSIZE));

+    }

+#else

+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);

+#endif

+  } else {

+#ifdef FULL_MAIN_BUFFER_SUPPORTED

+    main->whole_image[0] = NULL; /* flag for no virtual arrays */

+#endif

+    /* Allocate a strip buffer for each component */

+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;

+	 ci++, compptr++) {

+      main->buffer[ci] = (*cinfo->mem->alloc_sarray)

+	((j_common_ptr) cinfo, JPOOL_IMAGE,

+	 compptr->width_in_blocks * DCTSIZE,

+	 (JDIMENSION) (compptr->v_samp_factor * DCTSIZE));

+    }

+  }

+}

+

+#endif //_FX_JPEG_TURBO_