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Diffstat (limited to 'app/paint/gimpmybrushcore.c')
| -rw-r--r-- | app/paint/gimpmybrushcore.c | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/app/paint/gimpmybrushcore.c b/app/paint/gimpmybrushcore.c new file mode 100644 index 0000000..9e96821 --- /dev/null +++ b/app/paint/gimpmybrushcore.c @@ -0,0 +1,421 @@ +/* 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 <string.h> + +#include <cairo.h> +#include <gdk-pixbuf/gdk-pixbuf.h> +#include <gegl.h> + +#include <mypaint-brush.h> + +#include "libgimpmath/gimpmath.h" +#include "libgimpcolor/gimpcolor.h" + +#include "paint-types.h" + +#include "gegl/gimp-gegl-utils.h" + +#include "core/gimp.h" +#include "core/gimp-palettes.h" +#include "core/gimpdrawable.h" +#include "core/gimperror.h" +#include "core/gimpmybrush.h" +#include "core/gimppickable.h" +#include "core/gimpsymmetry.h" + +#include "gimpmybrushcore.h" +#include "gimpmybrushsurface.h" +#include "gimpmybrushoptions.h" + +#include "gimp-intl.h" + + +struct _GimpMybrushCorePrivate +{ + GimpMybrush *mybrush; + GimpMybrushSurface *surface; + GList *brushes; + gboolean synthetic; + gint64 last_time; +}; + + +/* local function prototypes */ + +static void gimp_mybrush_core_finalize (GObject *object); + +static gboolean gimp_mybrush_core_start (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + const GimpCoords *coords, + GError **error); +static void gimp_mybrush_core_interpolate (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + guint32 time); +static void gimp_mybrush_core_paint (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + GimpSymmetry *sym, + GimpPaintState paint_state, + guint32 time); +static void gimp_mybrush_core_motion (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + GimpSymmetry *sym, + guint32 time); +static void gimp_mybrush_core_create_brushes (GimpMybrushCore *mybrush, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + GimpSymmetry *sym); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpMybrushCore, gimp_mybrush_core, + GIMP_TYPE_PAINT_CORE) + +#define parent_class gimp_mybrush_core_parent_class + + +void +gimp_mybrush_core_register (Gimp *gimp, + GimpPaintRegisterCallback callback) +{ + (* callback) (gimp, + GIMP_TYPE_MYBRUSH_CORE, + GIMP_TYPE_MYBRUSH_OPTIONS, + "gimp-mybrush", + _("Mybrush"), + "gimp-tool-mypaint-brush"); +} + +static void +gimp_mybrush_core_class_init (GimpMybrushCoreClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass); + + object_class->finalize = gimp_mybrush_core_finalize; + + paint_core_class->start = gimp_mybrush_core_start; + paint_core_class->paint = gimp_mybrush_core_paint; + paint_core_class->interpolate = gimp_mybrush_core_interpolate; +} + +static void +gimp_mybrush_core_init (GimpMybrushCore *mybrush) +{ + mybrush->private = gimp_mybrush_core_get_instance_private (mybrush); +} + +static void +gimp_mybrush_core_finalize (GObject *object) +{ + GimpMybrushCore *core = GIMP_MYBRUSH_CORE (object); + + if (core->private->brushes) + { + g_list_free_full (core->private->brushes, + (GDestroyNotify) mypaint_brush_unref); + core->private->brushes = NULL; + } + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static gboolean +gimp_mybrush_core_start (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + const GimpCoords *coords, + GError **error) +{ + GimpMybrushCore *core = GIMP_MYBRUSH_CORE (paint_core); + GimpContext *context = GIMP_CONTEXT (paint_options); + + core->private->mybrush = gimp_context_get_mybrush (context); + + if (! core->private->mybrush) + { + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("No MyPaint brushes available for use with this tool.")); + return FALSE; + } + + return TRUE; +} + +static void +gimp_mybrush_core_interpolate (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + guint32 time) +{ + GimpMybrushCore *mybrush = GIMP_MYBRUSH_CORE (paint_core); + + /* If this is the first motion the brush has received then + * we're being asked to draw a synthetic stroke in line mode + */ + if (mybrush->private->last_time < 0) + { + GimpCoords saved_coords = paint_core->cur_coords; + + paint_core->cur_coords = paint_core->last_coords; + + mybrush->private->synthetic = TRUE; + + gimp_paint_core_paint (paint_core, drawable, paint_options, + GIMP_PAINT_STATE_MOTION, time); + + paint_core->cur_coords = saved_coords; + } + + gimp_paint_core_paint (paint_core, drawable, paint_options, + GIMP_PAINT_STATE_MOTION, time); + + paint_core->last_coords = paint_core->cur_coords; +} + +static void +gimp_mybrush_core_paint (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + GimpSymmetry *sym, + GimpPaintState paint_state, + guint32 time) +{ + GimpMybrushCore *mybrush = GIMP_MYBRUSH_CORE (paint_core); + GimpContext *context = GIMP_CONTEXT (paint_options); + GimpRGB fg; + + switch (paint_state) + { + case GIMP_PAINT_STATE_INIT: + gimp_context_get_foreground (context, &fg); + gimp_palettes_add_color_history (context->gimp, &fg); + gimp_symmetry_set_stateful (sym, TRUE); + + mybrush->private->surface = + gimp_mypaint_surface_new (gimp_drawable_get_buffer (drawable), + gimp_drawable_get_active_mask (drawable), + paint_core->mask_buffer, + paint_core->mask_x_offset, + paint_core->mask_y_offset, + GIMP_MYBRUSH_OPTIONS (paint_options)); + + gimp_mybrush_core_create_brushes (mybrush, drawable, paint_options, sym); + + mybrush->private->last_time = -1; + mybrush->private->synthetic = FALSE; + break; + + case GIMP_PAINT_STATE_MOTION: + gimp_mybrush_core_motion (paint_core, drawable, paint_options, + sym, time); + break; + + case GIMP_PAINT_STATE_FINISH: + gimp_symmetry_set_stateful (sym, FALSE); + mypaint_surface_unref ((MyPaintSurface *) mybrush->private->surface); + mybrush->private->surface = NULL; + + g_list_free_full (mybrush->private->brushes, + (GDestroyNotify) mypaint_brush_unref); + mybrush->private->brushes = NULL; + break; + } +} + +static void +gimp_mybrush_core_motion (GimpPaintCore *paint_core, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + GimpSymmetry *sym, + guint32 time) +{ + GimpMybrushCore *mybrush = GIMP_MYBRUSH_CORE (paint_core); + MyPaintRectangle rect; + GList *iter; + gdouble dt = 0.0; + gint n_strokes; + gint i; + + n_strokes = gimp_symmetry_get_size (sym); + + /* The number of strokes may change during a motion, depending on + * the type of symmetry. When that happens, reset the brushes. + */ + if (g_list_length (mybrush->private->brushes) != n_strokes) + { + gimp_mybrush_core_create_brushes (mybrush, drawable, paint_options, sym); + } + + mypaint_surface_begin_atomic ((MyPaintSurface *) mybrush->private->surface); + + if (mybrush->private->last_time < 0) + { + /* First motion, so we need zero pressure events to start the strokes */ + for (iter = mybrush->private->brushes, i = 0; + iter; + iter = g_list_next (iter), i++) + { + MyPaintBrush *brush = iter->data; + GimpCoords *coords = gimp_symmetry_get_coords (sym, i); + + mypaint_brush_stroke_to (brush, + (MyPaintSurface *) mybrush->private->surface, + coords->x, + coords->y, + 0.0f, + coords->xtilt, + coords->ytilt, + 1.0f /* Pretend the cursor hasn't moved in a while */); + } + + dt = 0.015; + } + else if (mybrush->private->synthetic) + { + GimpVector2 v = { paint_core->cur_coords.x - paint_core->last_coords.x, + paint_core->cur_coords.y - paint_core->last_coords.y }; + + dt = 0.0005 * gimp_vector2_length_val (v); + } + else + { + dt = (time - mybrush->private->last_time) * 0.001; + } + + for (iter = mybrush->private->brushes, i = 0; + iter; + iter = g_list_next (iter), i++) + { + MyPaintBrush *brush = iter->data; + GimpCoords *coords = gimp_symmetry_get_coords (sym, i); + gdouble pressure = coords->pressure; + + /* libmypaint expects non-extended devices to default to 0.5 pressure */ + if (! coords->extended) + pressure = 0.5f; + + mypaint_brush_stroke_to (brush, + (MyPaintSurface *) mybrush->private->surface, + coords->x, + coords->y, + pressure, + coords->xtilt, + coords->ytilt, + dt); + } + + mybrush->private->last_time = time; + + mypaint_surface_end_atomic ((MyPaintSurface *) mybrush->private->surface, + &rect); + + if (rect.width > 0 && rect.height > 0) + { + paint_core->x1 = MIN (paint_core->x1, rect.x); + paint_core->y1 = MIN (paint_core->y1, rect.y); + paint_core->x2 = MAX (paint_core->x2, rect.x + rect.width); + paint_core->y2 = MAX (paint_core->y2, rect.y + rect.height); + + gimp_drawable_update (drawable, rect.x, rect.y, rect.width, rect.height); + } +} + +static void +gimp_mybrush_core_create_brushes (GimpMybrushCore *mybrush, + GimpDrawable *drawable, + GimpPaintOptions *paint_options, + GimpSymmetry *sym) +{ + GimpMybrushOptions *options = GIMP_MYBRUSH_OPTIONS (paint_options); + GimpContext *context = GIMP_CONTEXT (paint_options); + GimpRGB fg; + GimpHSV hsv; + gint n_strokes; + gint i; + + if (mybrush->private->brushes) + { + g_list_free_full (mybrush->private->brushes, + (GDestroyNotify) mypaint_brush_unref); + mybrush->private->brushes = NULL; + } + + if (options->eraser) + gimp_context_get_background (context, &fg); + else + gimp_context_get_foreground (context, &fg); + + gimp_pickable_srgb_to_image_color (GIMP_PICKABLE (drawable), + &fg, &fg); + gimp_rgb_to_hsv (&fg, &hsv); + + n_strokes = gimp_symmetry_get_size (sym); + + for (i = 0; i < n_strokes; i++) + { + MyPaintBrush *brush = mypaint_brush_new (); + const gchar *brush_data; + + mypaint_brush_from_defaults (brush); + brush_data = gimp_mybrush_get_brush_json (mybrush->private->mybrush); + if (brush_data) + mypaint_brush_from_string (brush, brush_data); + + if (! mypaint_brush_get_base_value (brush, + MYPAINT_BRUSH_SETTING_RESTORE_COLOR)) + { + mypaint_brush_set_base_value (brush, + MYPAINT_BRUSH_SETTING_COLOR_H, + hsv.h); + mypaint_brush_set_base_value (brush, + MYPAINT_BRUSH_SETTING_COLOR_S, + hsv.s); + mypaint_brush_set_base_value (brush, + MYPAINT_BRUSH_SETTING_COLOR_V, + hsv.v); + } + + mypaint_brush_set_base_value (brush, + MYPAINT_BRUSH_SETTING_RADIUS_LOGARITHMIC, + options->radius); + mypaint_brush_set_base_value (brush, + MYPAINT_BRUSH_SETTING_OPAQUE, + options->opaque * + gimp_context_get_opacity (context)); + mypaint_brush_set_base_value (brush, + MYPAINT_BRUSH_SETTING_HARDNESS, + options->hardness); + mypaint_brush_set_base_value (brush, + MYPAINT_BRUSH_SETTING_ERASER, + (options->eraser && + gimp_drawable_has_alpha (drawable)) ? + 1.0f : 0.0f); + + mypaint_brush_new_stroke (brush); + + mybrush->private->brushes = g_list_prepend (mybrush->private->brushes, + brush); + } + + mybrush->private->brushes = g_list_reverse (mybrush->private->brushes); +} |