diff options
Diffstat (limited to 'app/display/gimpdisplayshell-render.c')
| -rw-r--r-- | app/display/gimpdisplayshell-render.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/app/display/gimpdisplayshell-render.c b/app/display/gimpdisplayshell-render.c new file mode 100644 index 0000000..48518ac --- /dev/null +++ b/app/display/gimpdisplayshell-render.c @@ -0,0 +1,360 @@ +/* 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); + + /* While converting, the render can be wrong; but worse, we rely on allocated + * data which might be the wrong size and this was a crash we had which was + * hard to diagnose as it doesn't always crash immediately (see discussions in + * #9136). This is why this assert is important. We want to make sure we never + * call this when the shell's image is in the inconsistent "converting" state. + */ + g_return_if_fail (! gimp_image_get_converting (image)); + + 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); + } +} |