move eyedropper into its own file, uses mostly different includes to interface_ops.c

1 files changed, 333 insertions, 0 deletions

diff --git a/source/blender/editors/interface/interface_eyedropper.c b/source/blender/editors/interface/interface_eyedropper.c
new file mode 100644
index 00000000000..1838381636a
--- /dev/null
+++ b/source/blender/editors/interface/interface_eyedropper.c
@@ -0,0 +1,333 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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 2
+ * 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, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2009 Blender Foundation.
+ * All rights reserved.
+ *
+ * Contributor(s): Blender Foundation, Joshua Leung
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/editors/interface/interface_eyedropper.c
+ *  \ingroup edinterface
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "DNA_space_types.h"
+#include "DNA_screen_types.h"
+
+#include "BLI_blenlib.h"
+#include "BLI_math_vector.h"
+
+#include "BKE_context.h"
+#include "BKE_screen.h"
+
+#include "RNA_access.h"
+
+#include "BIF_gl.h"
+
+#include "UI_interface.h"
+
+#include "IMB_colormanagement.h"
+
+#include "interface_intern.h"
+
+#include "WM_api.h"
+#include "WM_types.h"
+
+/* for HDR color sampling */
+#include "ED_image.h"
+#include "ED_node.h"
+#include "ED_clip.h"
+
+
+/** \name Eyedropper (RGB Color)
+ * \{ */
+
+typedef struct Eyedropper {
+	struct ColorManagedDisplay *display;
+
+	PointerRNA ptr;
+	PropertyRNA *prop;
+	int index;
+
+	int   accum_start; /* has mouse been presed */
+	float accum_col[3];
+	int   accum_tot;
+} Eyedropper;
+
+static int eyedropper_init(bContext *C, wmOperator *op)
+{
+	Scene *scene = CTX_data_scene(C);
+	Eyedropper *eye;
+
+	op->customdata = eye = MEM_callocN(sizeof(Eyedropper), "Eyedropper");
+
+	uiContextActiveProperty(C, &eye->ptr, &eye->prop, &eye->index);
+
+	if ((eye->ptr.data == NULL) ||
+	    (eye->prop == NULL) ||
+	    (RNA_property_editable(&eye->ptr, eye->prop) == FALSE) ||
+	    (RNA_property_array_length(&eye->ptr, eye->prop) < 3) ||
+	    (RNA_property_type(eye->prop) != PROP_FLOAT))
+	{
+		return FALSE;
+	}
+
+	if (RNA_property_subtype(eye->prop) == PROP_COLOR) {
+		const char *display_device;
+
+		display_device = scene->display_settings.display_device;
+		eye->display = IMB_colormanagement_display_get_named(display_device);
+	}
+
+	return TRUE;
+}
+
+static void eyedropper_exit(bContext *C, wmOperator *op)
+{
+	WM_cursor_modal_restore(CTX_wm_window(C));
+
+	if (op->customdata)
+		MEM_freeN(op->customdata);
+	op->customdata = NULL;
+}
+
+static int eyedropper_cancel(bContext *C, wmOperator *op)
+{
+	eyedropper_exit(C, op);
+	return OPERATOR_CANCELLED;
+}
+
+/* *** eyedropper_color_ helper functions *** */
+
+/**
+ * \brief get the color from the screen.
+ *
+ * Special check for image or nodes where we MAY have HDR pixels which don't display.
+ */
+static void eyedropper_color_sample_fl(bContext *C, Eyedropper *UNUSED(eye), int mx, int my, float r_col[3])
+{
+
+	/* we could use some clever */
+	wmWindow *win = CTX_wm_window(C);
+	ScrArea *sa;
+	for (sa = win->screen->areabase.first; sa; sa = sa->next) {
+		if (BLI_rcti_isect_pt(&sa->totrct, mx, my)) {
+			if (sa->spacetype == SPACE_IMAGE) {
+				ARegion *ar = BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
+				if (ar && BLI_rcti_isect_pt(&ar->winrct, mx, my)) {
+					SpaceImage *sima = sa->spacedata.first;
+					int mval[2] = {mx - ar->winrct.xmin,
+					               my - ar->winrct.ymin};
+
+					if (ED_space_image_color_sample(sima, ar, mval, r_col)) {
+						return;
+					}
+				}
+			}
+			else if (sa->spacetype == SPACE_NODE) {
+				ARegion *ar = BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
+				if (ar && BLI_rcti_isect_pt(&ar->winrct, mx, my)) {
+					SpaceNode *snode = sa->spacedata.first;
+					int mval[2] = {mx - ar->winrct.xmin,
+					               my - ar->winrct.ymin};
+
+					if (ED_space_node_color_sample(snode, ar, mval, r_col)) {
+						return;
+					}
+				}
+			}
+			else if (sa->spacetype == SPACE_CLIP) {
+				ARegion *ar = BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
+				if (ar && BLI_rcti_isect_pt(&ar->winrct, mx, my)) {
+					SpaceClip *sc = sa->spacedata.first;
+					int mval[2] = {mx - ar->winrct.xmin,
+					               my - ar->winrct.ymin};
+
+					if (ED_space_clip_color_sample(sc, ar, mval, r_col)) {
+						return;
+					}
+				}
+			}
+		}
+	}
+
+	/* fallback to simple opengl picker */
+	glReadBuffer(GL_FRONT);
+	glReadPixels(mx, my, 1, 1, GL_RGB, GL_FLOAT, r_col);
+	glReadBuffer(GL_BACK);
+}
+
+/* sets the sample color RGB, maintaining A */
+static void eyedropper_color_set(bContext *C, Eyedropper *eye, const float col[3])
+{
+	float col_conv[4];
+
+	/* to maintain alpha */
+	RNA_property_float_get_array(&eye->ptr, eye->prop, col_conv);
+
+	/* convert from display space to linear rgb space */
+	if (eye->display) {
+		copy_v3_v3(col_conv, col);
+		IMB_colormanagement_display_to_scene_linear_v3(col_conv, eye->display);
+	}
+	else {
+		copy_v3_v3(col_conv, col);
+	}
+
+	RNA_property_float_set_array(&eye->ptr, eye->prop, col_conv);
+
+	RNA_property_update(C, &eye->ptr, eye->prop);
+}
+
+/* set sample from accumulated values */
+static void eyedropper_color_set_accum(bContext *C, Eyedropper *eye)
+{
+	float col[3];
+	mul_v3_v3fl(col, eye->accum_col, 1.0f / (float)eye->accum_tot);
+	eyedropper_color_set(C, eye, col);
+}
+
+/* single point sample & set */
+static void eyedropper_color_sample(bContext *C, Eyedropper *eye, int mx, int my)
+{
+	float col[3];
+	eyedropper_color_sample_fl(C, eye, mx, my, col);
+	eyedropper_color_set(C, eye, col);
+}
+
+static void eyedropper_color_sample_accum(bContext *C, Eyedropper *eye, int mx, int my)
+{
+	float col[3];
+	eyedropper_color_sample_fl(C, eye, mx, my, col);
+	/* delay linear conversion */
+	add_v3_v3(eye->accum_col, col);
+	eye->accum_tot++;
+}
+
+/* main modal status check */
+static int eyedropper_modal(bContext *C, wmOperator *op, const wmEvent *event)
+{
+	Eyedropper *eye = (Eyedropper *)op->customdata;
+
+	switch (event->type) {
+		case ESCKEY:
+		case RIGHTMOUSE:
+			return eyedropper_cancel(C, op);
+		case LEFTMOUSE:
+			if (event->val == KM_RELEASE) {
+				if (eye->accum_tot == 0) {
+					eyedropper_color_sample(C, eye, event->x, event->y);
+				}
+				else {
+					eyedropper_color_set_accum(C, eye);
+				}
+				eyedropper_exit(C, op);
+				return OPERATOR_FINISHED;
+			}
+			else if (event->val == KM_PRESS) {
+				/* enable accum and make first sample */
+				eye->accum_start = TRUE;
+				eyedropper_color_sample_accum(C, eye, event->x, event->y);
+			}
+			break;
+		case MOUSEMOVE:
+			if (eye->accum_start) {
+				/* button is pressed so keep sampling */
+				eyedropper_color_sample_accum(C, eye, event->x, event->y);
+				eyedropper_color_set_accum(C, eye);
+			}
+			break;
+		case SPACEKEY:
+			if (event->val == KM_RELEASE) {
+				eye->accum_tot = 0;
+				zero_v3(eye->accum_col);
+				eyedropper_color_sample_accum(C, eye, event->x, event->y);
+				eyedropper_color_set_accum(C, eye);
+			}
+			break;
+	}
+
+	return OPERATOR_RUNNING_MODAL;
+}
+
+/* Modal Operator init */
+static int eyedropper_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+{
+	/* init */
+	if (eyedropper_init(C, op)) {
+		WM_cursor_modal_set(CTX_wm_window(C), BC_EYEDROPPER_CURSOR);
+
+		/* add temp handler */
+		WM_event_add_modal_handler(C, op);
+
+		return OPERATOR_RUNNING_MODAL;
+	}
+	else {
+		eyedropper_exit(C, op);
+		return OPERATOR_CANCELLED;
+	}
+}
+
+/* Repeat operator */
+static int eyedropper_exec(bContext *C, wmOperator *op)
+{
+	/* init */
+	if (eyedropper_init(C, op)) {
+
+		/* do something */
+
+		/* cleanup */
+		eyedropper_exit(C, op);
+
+		return OPERATOR_FINISHED;
+	}
+	else {
+		return OPERATOR_CANCELLED;
+	}
+}
+
+static int eyedropper_poll(bContext *C)
+{
+	if (!CTX_wm_window(C)) return 0;
+	else return 1;
+}
+
+void UI_OT_eyedropper_color(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Eyedropper";
+	ot->idname = "UI_OT_eyedropper_color";
+	ot->description = "Sample a color from the Blender Window to store in a property";
+
+	/* api callbacks */
+	ot->invoke = eyedropper_invoke;
+	ot->modal = eyedropper_modal;
+	ot->cancel = eyedropper_cancel;
+	ot->exec = eyedropper_exec;
+	ot->poll = eyedropper_poll;
+
+	/* flags */
+	ot->flag = OPTYPE_BLOCKING;
+
+	/* properties */
+}
+
+/** \} */