gfx/thebes/gfxPSSurface.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "gfxPSSurface.h"
   7
   8 #include "cairo.h"
   9 #include "cairo-ps.h"
  10
  11 static cairo_status_t
  12 write_func(void *closure, const unsigned char *data, unsigned int length)
  13 {
  14     nsCOMPtr<nsIOutputStream> out = reinterpret_cast<nsIOutputStream*>(closure);
  15     do {
  16         uint32_t wrote = 0;
  17         if (NS_FAILED(out->Write((const char*)data, length, &wrote)))
  18             break;
  19         data += wrote; length -= wrote;
  20     } while (length > 0);
  21     NS_ASSERTION(length == 0, "not everything was written to the file");
  22     return CAIRO_STATUS_SUCCESS;
  23 }
  24
  25 gfxPSSurface::gfxPSSurface(nsIOutputStream *aStream, const gfxSize& aSizeInPoints, PageOrientation aOrientation)
  26     : mStream(aStream), mXDPI(-1), mYDPI(-1), mOrientation(aOrientation)
  27 {
  28     mSize = gfxIntSize(aSizeInPoints.width, aSizeInPoints.height);
  29
  30     // The PS output does not specify the page size so to print
  31     // landscape we need to rotate the drawing 90 degrees and print on
  32     // portrait paper. If printing landscape, swap the width/height
  33     // supplied to cairo to select a portrait print area. gfxContext
  34     // will perform the rotation when GetRotateForLandscape() is TRUE.
  35     gfxIntSize cairoSize;
  36     if (mOrientation == PORTRAIT) {
  37         cairoSize = mSize;
  38     } else {
  39         cairoSize = gfxIntSize(mSize.height, mSize.width);
  40     }
  41     cairo_surface_t* ps_surface = cairo_ps_surface_create_for_stream(write_func, (void*)mStream, cairoSize.width, cairoSize.height);
  42     cairo_ps_surface_restrict_to_level(ps_surface, CAIRO_PS_LEVEL_2);
  43     Init(ps_surface);
  44 }
  45
  46 gfxPSSurface::~gfxPSSurface()
  47 {
  48 }
  49
  50 nsresult
  51 gfxPSSurface::BeginPrinting(const nsAString& aTitle, const nsAString& aPrintToFileName)
  52 {
  53     if (mOrientation == PORTRAIT) {
  54       cairo_ps_surface_dsc_comment (mSurface, "%%Orientation: Portrait");
  55     } else {
  56       cairo_ps_surface_dsc_comment (mSurface, "%%Orientation: Landscape");
  57     }
  58     return NS_OK;
  59 }
  60
  61 nsresult
  62 gfxPSSurface::EndPrinting()
  63 {
  64     return NS_OK;
  65 }
  66
  67 nsresult
  68 gfxPSSurface::AbortPrinting()
  69 {
  70     return NS_OK;
  71 }
  72
  73 nsresult
  74 gfxPSSurface::BeginPage()
  75 {
  76     return NS_OK;
  77 }
  78
  79 nsresult
  80 gfxPSSurface::EndPage()
  81 {
  82     cairo_surface_show_page(CairoSurface());
  83     return NS_OK;
  84 }
  85
  86 void
  87 gfxPSSurface::Finish()
  88 {
  89     gfxASurface::Finish();
  90     mStream->Close();
  91 }
  92
  93 void
  94 gfxPSSurface::SetDPI(double xDPI, double yDPI)
  95 {
  96     mXDPI = xDPI;
  97     mYDPI = yDPI;
  98     cairo_surface_set_fallback_resolution(CairoSurface(), xDPI, yDPI);
  99 }
 100
 101 void
 102 gfxPSSurface::GetDPI(double *xDPI, double *yDPI)
 103 {
 104     *xDPI = mXDPI;
 105     *yDPI = mYDPI;
 106 }
 107