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draw in spans of tile height.
2006-12-27 Sven Neumann <sven@gimp.org> * plug-ins/print/print-draw-page.c: draw in spans of tile height.
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Sven Neumann
Sven Neumann
parent
f35565c887
commit
8d133fd33f
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@ -1,6 +1,9 @@
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2006-12-27 Sven Neumann <sven@gimp.org>
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* plug-ins/print/print-draw-page.c
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* plug-ins/print/print-draw-page.c: draw in spans of tile height.
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2006-12-27 Sven Neumann <sven@gimp.org>
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* plug-ins/print/print-page-layout.c
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* plug-ins/print/print.[ch]: don't set the resolution and unit on
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the image, only initialize the dialog with these values.
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@ -34,28 +34,36 @@
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#define HEADER_HEIGHT (20 * 72.0 / 25.4)
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#define EPSILON 0.0001
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static guchar * get_image_pixels (PrintData *data,
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gint *width_ptr,
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gint *height_ptr,
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gint *rowstride_ptr);
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static void draw_info_header (GtkPrintContext *context,
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cairo_t *cr,
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PrintData *data);
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static cairo_surface_t * create_surface (guchar *pixels,
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gint x,
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gint y,
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gint width,
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gint height,
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gint rowstride);
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static void draw_info_header (GtkPrintContext *context,
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cairo_t *cr,
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PrintData *data);
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gboolean
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draw_page_cairo (GtkPrintContext *context,
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PrintData *data)
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{
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gint tile_height = gimp_tile_height ();
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gint32 image_id = data->image_id;
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gint32 drawable_id = data->drawable_id;
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GimpDrawable *drawable;
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GimpPixelRgn region;
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cairo_t *cr;
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gdouble cr_width;
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gdouble cr_height;
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gdouble cr_dpi_x;
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gdouble cr_dpi_y;
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gint image_width;
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gint image_height;
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gint image_rowstride;
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gint width;
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gint height;
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gint rowstride;
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gint y;
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gdouble scale_x;
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gdouble scale_y;
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gdouble x0 = 0;
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@ -63,30 +71,39 @@ draw_page_cairo (GtkPrintContext *context,
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guchar *pixels;
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cairo_surface_t *surface;
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/* export the image */
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gimp_export_image (&image_id, &drawable_id, NULL,
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GIMP_EXPORT_CAN_HANDLE_RGB |
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GIMP_EXPORT_CAN_HANDLE_ALPHA |
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GIMP_EXPORT_NEEDS_ALPHA);
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drawable = gimp_drawable_get (drawable_id);
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width = drawable->width;
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height = drawable->height;
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rowstride = drawable->bpp * width;
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cr = gtk_print_context_get_cairo_context (context);
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cr_width = gtk_print_context_get_width (context);
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cr_height = gtk_print_context_get_height (context);
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cr_dpi_x = gtk_print_context_get_dpi_x (context);
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cr_dpi_y = gtk_print_context_get_dpi_y (context);
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pixels = get_image_pixels (data, &image_width, &image_height,
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&image_rowstride);
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scale_x = cr_dpi_x / data->xres;
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scale_y = cr_dpi_y / data->yres;
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if (scale_x * image_width > cr_width + EPSILON)
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if (scale_x * width > cr_width + EPSILON)
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{
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g_message (_("Image width (%lg in) is larger than printable width (%lg in)."),
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image_width / data->xres, cr_width / cr_dpi_x);
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width / data->xres, cr_width / cr_dpi_x);
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gtk_print_operation_cancel (data->operation);
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return FALSE;
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}
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if (scale_y * image_height > cr_height + EPSILON)
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if (scale_y * height > cr_height + EPSILON)
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{
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g_message (_("Image height (%lg in) is larger than printable height (%lg in)."),
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image_height / data->yres, cr_height / cr_dpi_y);
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height / data->yres, cr_height / cr_dpi_y);
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gtk_print_operation_cancel (data->operation);
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return FALSE;
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}
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@ -100,73 +117,62 @@ draw_page_cairo (GtkPrintContext *context,
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cr_height -= HEADER_HEIGHT;
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}
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x0 = (cr_width - scale_x * image_width) / 2;
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y0 = (cr_height - scale_y * image_height) / 2;
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x0 = (cr_width - scale_x * width) / 2;
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y0 = (cr_height - scale_y * height) / 2;
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surface = cairo_image_surface_create_for_data (pixels, CAIRO_FORMAT_ARGB32,
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image_width, image_height,
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image_rowstride);
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cairo_translate (cr, x0, y0);
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cairo_scale (cr, scale_x, scale_y);
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cairo_set_source_surface (cr, surface, 0, 0);
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cairo_mask_surface (cr, surface, 0, 0);
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gimp_pixel_rgn_init (®ion, drawable, 0, 0, width, height, FALSE, FALSE);
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pixels = g_new (guchar, MIN (height, tile_height) * rowstride);
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for (y = 0; y < height; y += tile_height)
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{
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gint h = MIN (tile_height, height - y);
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gimp_pixel_rgn_get_rect (®ion, pixels, 0, y, width, h);
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surface = create_surface (pixels, 0, 0, width, h, rowstride);
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cairo_set_source_surface (cr, surface, 0, y);
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cairo_mask_surface (cr, surface, 0, y);
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cairo_surface_destroy (surface);
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}
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g_free (pixels);
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gimp_drawable_detach (drawable);
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if (image_id != data->image_id)
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gimp_image_delete (image_id);
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return TRUE;
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}
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static guchar *
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get_image_pixels (PrintData *data,
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gint *width_ptr,
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gint *height_ptr,
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gint *rowstride_ptr)
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static cairo_surface_t *
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create_surface (guchar *pixels,
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gint x,
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gint y,
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gint width,
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gint height,
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gint rowstride)
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{
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gint32 image_id = data->image_id;
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gint32 drawable_id = data->drawable_id;
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GimpDrawable *drawable;
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GimpPixelRgn region;
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gint width;
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gint height;
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gint rowstride;
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guchar *pixels;
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guint32 *cairo_data;
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gint len;
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guchar *p;
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gint i;
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/* export the image */
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gimp_export_image (&image_id, &drawable_id, NULL,
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GIMP_EXPORT_CAN_HANDLE_RGB |
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GIMP_EXPORT_CAN_HANDLE_ALPHA |
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GIMP_EXPORT_NEEDS_ALPHA);
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drawable = gimp_drawable_get (drawable_id);
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width = drawable->width;
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height = drawable->height;
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rowstride = width * drawable->bpp;
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pixels = g_new (guchar, height * rowstride);
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gimp_pixel_rgn_init (®ion, drawable, 0, 0, width, height, FALSE, FALSE);
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gimp_pixel_rgn_get_rect (®ion, pixels, 0, 0, width, height);
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gimp_drawable_detach (drawable);
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if (image_id != data->image_id)
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gimp_image_delete (image_id);
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guint32 *cairo_data = (guint32 *) pixels;
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guchar *p;
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gint len;
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gint i;
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/* knock pixels into the shape requested by cairo:
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*
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* CAIRO_FORMAT_ARGB32:
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* each pixel is a 32-bit quantity, with alpha in the upper 8 bits,
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* then red, then green, then blue. The 32-bit quantities are
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* stored native-endian. Pre-multiplied alpha is used.
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* stored native-endian. Pre-multiplied alpha is used.
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*
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*/
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cairo_data = (guint32 *) pixels;
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len = width * height;
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for (i = 0, p = pixels; i < len; i++)
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@ -188,11 +194,8 @@ get_image_pixels (PrintData *data,
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cairo_data[i] = (a << 24) + (r << 16) + (g << 8) + b;
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}
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*width_ptr = width;
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*height_ptr = height;
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*rowstride_ptr = rowstride;
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return pixels;
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return cairo_image_surface_create_for_data (pixels, CAIRO_FORMAT_ARGB32,
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width, height, rowstride);
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}
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