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-rw-r--r--app/display/gimpdisplayshell-render.c351
1 files changed, 351 insertions, 0 deletions
diff --git a/app/display/gimpdisplayshell-render.c b/app/display/gimpdisplayshell-render.c
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+++ b/app/display/gimpdisplayshell-render.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpmath/gimpmath.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "display-types.h"
+
+#include "config/gimpdisplayconfig.h"
+
+#include "gegl/gimp-gegl-utils.h"
+
+#include "core/gimpdrawable.h"
+#include "core/gimpimage.h"
+#include "core/gimppickable.h"
+#include "core/gimpprojectable.h"
+
+#include "gimpdisplay.h"
+#include "gimpdisplayshell.h"
+#include "gimpdisplayshell-transform.h"
+#include "gimpdisplayshell-filter.h"
+#include "gimpdisplayshell-profile.h"
+#include "gimpdisplayshell-render.h"
+#include "gimpdisplayshell-scroll.h"
+#include "gimpdisplayxfer.h"
+
+
+void
+gimp_display_shell_render (GimpDisplayShell *shell,
+ cairo_t *cr,
+ gint x,
+ gint y,
+ gint w,
+ gint h,
+ gdouble scale)
+{
+ GimpImage *image;
+ GeglBuffer *buffer;
+#ifdef USE_NODE_BLIT
+ GeglNode *node;
+#endif
+ GeglAbyssPolicy abyss_policy;
+ cairo_surface_t *xfer;
+ gint xfer_src_x;
+ gint xfer_src_y;
+ gint mask_src_x = 0;
+ gint mask_src_y = 0;
+ gint cairo_stride;
+ guchar *cairo_data;
+
+ g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+ g_return_if_fail (cr != NULL);
+ g_return_if_fail (w > 0 && w <= GIMP_DISPLAY_RENDER_BUF_WIDTH);
+ g_return_if_fail (h > 0 && h <= GIMP_DISPLAY_RENDER_BUF_HEIGHT);
+ g_return_if_fail (scale > 0.0);
+
+ image = gimp_display_get_image (shell->display);
+ buffer = gimp_pickable_get_buffer (
+ gimp_display_shell_get_pickable (shell));
+#ifdef USE_NODE_BLIT
+ node = gimp_projectable_get_graph (GIMP_PROJECTABLE (image));
+
+ gimp_projectable_begin_render (GIMP_PROJECTABLE (image));
+#endif
+
+ if (shell->show_all)
+ abyss_policy = GEGL_ABYSS_NONE;
+ else
+ abyss_policy = GEGL_ABYSS_CLAMP;
+
+ xfer = gimp_display_xfer_get_surface (shell->xfer, w, h,
+ &xfer_src_x, &xfer_src_y);
+
+ cairo_stride = cairo_image_surface_get_stride (xfer);
+ cairo_data = cairo_image_surface_get_data (xfer) +
+ xfer_src_y * cairo_stride + xfer_src_x * 4;
+
+ if (shell->profile_transform ||
+ gimp_display_shell_has_filter (shell))
+ {
+ gboolean can_convert_to_u8;
+
+ /* if there is a profile transform or a display filter, we need
+ * to use temp buffers
+ */
+
+ can_convert_to_u8 = gimp_display_shell_profile_can_convert_to_u8 (shell);
+
+ /* create the filter buffer if we have filters, or can't convert
+ * to u8 directly
+ */
+ if ((gimp_display_shell_has_filter (shell) || ! can_convert_to_u8) &&
+ ! shell->filter_buffer)
+ {
+ gint fw = GIMP_DISPLAY_RENDER_BUF_WIDTH;
+ gint fh = GIMP_DISPLAY_RENDER_BUF_HEIGHT;
+
+ shell->filter_data =
+ gegl_malloc (fw * fh *
+ babl_format_get_bytes_per_pixel (shell->filter_format));
+
+ shell->filter_stride =
+ fw * babl_format_get_bytes_per_pixel (shell->filter_format);
+
+ shell->filter_buffer =
+ gegl_buffer_linear_new_from_data (shell->filter_data,
+ shell->filter_format,
+ GEGL_RECTANGLE (0, 0, fw, fh),
+ GEGL_AUTO_ROWSTRIDE,
+ (GDestroyNotify) gegl_free,
+ shell->filter_data);
+ }
+
+ if (! gimp_display_shell_has_filter (shell) || shell->filter_transform)
+ {
+ /* if there are no filters, or there is a filter transform,
+ * load the projection pixels into the profile_buffer
+ */
+#ifndef USE_NODE_BLIT
+ gegl_buffer_get (buffer,
+ GEGL_RECTANGLE (x, y, w, h), scale,
+ gimp_projectable_get_format (GIMP_PROJECTABLE (image)),
+ shell->profile_data, shell->profile_stride,
+ abyss_policy);
+#else
+ gegl_node_blit (node,
+ scale, GEGL_RECTANGLE (x, y, w, h),
+ gimp_projectable_get_format (GIMP_PROJECTABLE (image)),
+ shell->profile_data, shell->profile_stride,
+ GEGL_BLIT_CACHE);
+#endif
+ }
+ else
+ {
+ /* otherwise, load the pixels directly into the filter_buffer
+ */
+#ifndef USE_NODE_BLIT
+ gegl_buffer_get (buffer,
+ GEGL_RECTANGLE (x, y, w, h), scale,
+ shell->filter_format,
+ shell->filter_data, shell->filter_stride,
+ abyss_policy);
+#else
+ gegl_node_blit (node,
+ scale, GEGL_RECTANGLE (x, y, w, h),
+ shell->filter_format,
+ shell->filter_data, shell->filter_stride,
+ GEGL_BLIT_CACHE);
+#endif
+ }
+
+ /* if there is a filter transform, convert the pixels from
+ * the profile_buffer to the filter_buffer
+ */
+ if (shell->filter_transform)
+ {
+ gimp_color_transform_process_buffer (shell->filter_transform,
+ shell->profile_buffer,
+ GEGL_RECTANGLE (0, 0, w, h),
+ shell->filter_buffer,
+ GEGL_RECTANGLE (0, 0, w, h));
+ }
+
+ /* if there are filters, apply them
+ */
+ if (gimp_display_shell_has_filter (shell))
+ {
+ GeglBuffer *filter_buffer;
+
+ /* shift the filter_buffer so that the area passed to
+ * the filters is the real render area, allowing for
+ * position-dependent filters
+ */
+ filter_buffer = g_object_new (GEGL_TYPE_BUFFER,
+ "source", shell->filter_buffer,
+ "shift-x", -x,
+ "shift-y", -y,
+ NULL);
+
+ /* convert the filter_buffer in place
+ */
+ gimp_color_display_stack_convert_buffer (shell->filter_stack,
+ filter_buffer,
+ GEGL_RECTANGLE (x, y, w, h));
+
+ g_object_unref (filter_buffer);
+ }
+
+ /* if there is a profile transform...
+ */
+ if (shell->profile_transform)
+ {
+ if (gimp_display_shell_has_filter (shell))
+ {
+ /* if we have filters, convert the pixels in the filter_buffer
+ * in-place
+ */
+ gimp_color_transform_process_buffer (shell->profile_transform,
+ shell->filter_buffer,
+ GEGL_RECTANGLE (0, 0, w, h),
+ shell->filter_buffer,
+ GEGL_RECTANGLE (0, 0, w, h));
+ }
+ else if (! can_convert_to_u8)
+ {
+ /* otherwise, if we can't convert to u8 directly, convert
+ * the pixels from the profile_buffer to the filter_buffer
+ */
+ gimp_color_transform_process_buffer (shell->profile_transform,
+ shell->profile_buffer,
+ GEGL_RECTANGLE (0, 0, w, h),
+ shell->filter_buffer,
+ GEGL_RECTANGLE (0, 0, w, h));
+ }
+ else
+ {
+ GeglBuffer *buffer =
+ gegl_buffer_linear_new_from_data (cairo_data,
+ babl_format ("cairo-ARGB32"),
+ GEGL_RECTANGLE (0, 0, w, h),
+ cairo_stride,
+ NULL, NULL);
+
+ /* otherwise, convert the profile_buffer directly into
+ * the cairo_buffer
+ */
+ gimp_color_transform_process_buffer (shell->profile_transform,
+ shell->profile_buffer,
+ GEGL_RECTANGLE (0, 0, w, h),
+ buffer,
+ GEGL_RECTANGLE (0, 0, w, h));
+ g_object_unref (buffer);
+ }
+ }
+
+ /* finally, copy the filter buffer to the cairo-ARGB32 buffer,
+ * if necessary
+ */
+ if (gimp_display_shell_has_filter (shell) || ! can_convert_to_u8)
+ {
+ gegl_buffer_get (shell->filter_buffer,
+ GEGL_RECTANGLE (0, 0, w, h), 1.0,
+ babl_format ("cairo-ARGB32"),
+ cairo_data, cairo_stride,
+ GEGL_ABYSS_NONE);
+ }
+ }
+ else
+ {
+ /* otherwise we can copy the projection pixels straight to the
+ * cairo-ARGB32 buffer
+ */
+#ifndef USE_NODE_BLIT
+ gegl_buffer_get (buffer,
+ GEGL_RECTANGLE (x, y, w, h), scale,
+ babl_format ("cairo-ARGB32"),
+ cairo_data, cairo_stride,
+ abyss_policy);
+#else
+ gegl_node_blit (node,
+ scale, GEGL_RECTANGLE (x, y, w, h),
+ babl_format ("cairo-ARGB32"),
+ cairo_data, cairo_stride,
+ GEGL_BLIT_CACHE);
+#endif
+ }
+
+#ifdef USE_NODE_BLIT
+ gimp_projectable_end_render (GIMP_PROJECTABLE (image));
+#endif
+
+ if (shell->mask)
+ {
+ if (! shell->mask_surface)
+ {
+ shell->mask_surface =
+ cairo_image_surface_create (CAIRO_FORMAT_A8,
+ GIMP_DISPLAY_RENDER_BUF_WIDTH,
+ GIMP_DISPLAY_RENDER_BUF_HEIGHT);
+ }
+
+ cairo_surface_mark_dirty (shell->mask_surface);
+
+ cairo_stride = cairo_image_surface_get_stride (shell->mask_surface);
+ cairo_data = cairo_image_surface_get_data (shell->mask_surface) +
+ mask_src_y * cairo_stride + mask_src_x;
+
+ gegl_buffer_get (shell->mask,
+ GEGL_RECTANGLE (x - floor (shell->mask_offset_x * scale),
+ y - floor (shell->mask_offset_y * scale),
+ w, h),
+ scale,
+ babl_format ("Y u8"),
+ cairo_data, cairo_stride,
+ GEGL_ABYSS_NONE);
+
+ if (shell->mask_inverted)
+ {
+ gint mask_height = h;
+
+ while (mask_height--)
+ {
+ gint mask_width = w;
+ guchar *d = cairo_data;
+
+ while (mask_width--)
+ {
+ guchar inv = 255 - *d;
+
+ *d++ = inv;
+ }
+
+ cairo_data += cairo_stride;
+ }
+ }
+ }
+
+ /* put it to the screen */
+ cairo_set_source_surface (cr, xfer,
+ x - xfer_src_x,
+ y - xfer_src_y);
+ cairo_paint (cr);
+
+ if (shell->mask)
+ {
+ gimp_cairo_set_source_rgba (cr, &shell->mask_color);
+ cairo_mask_surface (cr, shell->mask_surface,
+ x - mask_src_x,
+ y - mask_src_y);
+ }
+}
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