diff options
author | Campbell Barton <ideasman42@gmail.com> | 2017-12-12 07:16:13 +0300 |
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committer | Campbell Barton <ideasman42@gmail.com> | 2017-12-12 07:44:59 +0300 |
commit | b3c147a04f16f6fe8ea4c902f9d58ec5dbcdb392 (patch) | |
tree | 6bda963409d858c7688bc13434e6a01f5891a7e6 /source/blender/editors/interface/interface_eyedropper_colorband.c | |
parent | 58aa31a9ec0fc5b7dbef02b4308a826b49abf3d8 (diff) |
Cleanup: split eyedropper into separate files
Each handles separate data-types and didn't share much logic,
better put each in it's own file.
Diffstat (limited to 'source/blender/editors/interface/interface_eyedropper_colorband.c')
-rw-r--r-- | source/blender/editors/interface/interface_eyedropper_colorband.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/source/blender/editors/interface/interface_eyedropper_colorband.c b/source/blender/editors/interface/interface_eyedropper_colorband.c new file mode 100644 index 00000000000..655c2c46c6c --- /dev/null +++ b/source/blender/editors/interface/interface_eyedropper_colorband.c @@ -0,0 +1,326 @@ +/* + * ***** 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. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/editors/interface/interface_eyedropper_colorband.c + * \ingroup edinterface + * + * Eyedropper (Color Band). + * + * Operates by either: + * - Dragging a straight line, sampling pixels formed by the line to extract a gradient. + * - Clicking on points, adding each color to the end of the color-band. + * + * Defines: + * - #UI_OT_eyedropper_colorband + * - #UI_OT_eyedropper_colorband_point + */ + +#include "MEM_guardedalloc.h" + +#include "DNA_screen_types.h" + +#include "BLI_bitmap_draw_2d.h" +#include "BLI_math_vector.h" + +#include "BKE_context.h" +#include "BKE_colorband.h" + +#include "RNA_access.h" + +#include "UI_interface.h" + +#include "WM_api.h" +#include "WM_types.h" + +#include "interface_intern.h" + +#include "interface_eyedropper_intern.h" + +typedef struct Colorband_RNAUpdateCb { + PointerRNA ptr; + PropertyRNA *prop; +} Colorband_RNAUpdateCb; + +typedef struct EyedropperColorband { + int last_x, last_y; + /* Alpha is currently fixed at 1.0, may support in future. */ + float (*color_buffer)[4]; + int color_buffer_alloc; + int color_buffer_len; + bool sample_start; + ColorBand init_color_band; + ColorBand *color_band; + PointerRNA ptr; + PropertyRNA *prop; +} EyedropperColorband; + +/* For user-data only. */ +struct EyedropperColorband_Context { + bContext *context; + EyedropperColorband *eye; +}; + +static bool eyedropper_colorband_init(bContext *C, wmOperator *op) +{ + ColorBand *band = NULL; + EyedropperColorband *eye; + + uiBut *but = UI_context_active_but_get(C); + + if (but == NULL) { + /* pass */ + } + else if (but->type == UI_BTYPE_COLORBAND) { + /* When invoked with a hotkey, we can find the band in 'but->poin'. */ + band = (ColorBand *)but->poin; + } + else { + /* When invoked from a button it's in custom_data field. */ + band = (ColorBand *)but->custom_data; + } + + if (!band) + return false; + + op->customdata = eye = MEM_callocN(sizeof(EyedropperColorband), __func__); + eye->color_buffer_alloc = 16; + eye->color_buffer = MEM_mallocN(sizeof(*eye->color_buffer) * eye->color_buffer_alloc, __func__); + eye->color_buffer_len = 0; + eye->color_band = band; + eye->init_color_band = *eye->color_band; + eye->ptr = ((Colorband_RNAUpdateCb *)but->func_argN)->ptr; + eye->prop = ((Colorband_RNAUpdateCb *)but->func_argN)->prop; + + return true; +} + +static void eyedropper_colorband_sample_point(bContext *C, EyedropperColorband *eye, int mx, int my) +{ + if (eye->last_x != mx || eye->last_y != my) { + float col[4]; + col[3] = 1.0f; /* TODO: sample alpha */ + eyedropper_color_sample_fl(C, mx, my, col); + if (eye->color_buffer_len + 1 == eye->color_buffer_alloc) { + eye->color_buffer_alloc *= 2; + eye->color_buffer = MEM_reallocN(eye->color_buffer, sizeof(*eye->color_buffer) * eye->color_buffer_alloc); + } + copy_v4_v4(eye->color_buffer[eye->color_buffer_len], col); + eye->color_buffer_len += 1; + eye->last_x = mx; + eye->last_y = my; + } +} + +static bool eyedropper_colorband_sample_callback(int mx, int my, void *userdata) +{ + struct EyedropperColorband_Context *data = userdata; + bContext *C = data->context; + EyedropperColorband *eye = data->eye; + eyedropper_colorband_sample_point(C, eye, mx, my); + return true; +} + +static void eyedropper_colorband_sample_segment(bContext *C, EyedropperColorband *eye, int mx, int my) +{ + /* Since the mouse tends to move rather rapidly we use #BLI_bitmap_draw_2d_line_v2v2i + * to interpolate between the reported coordinates */ + struct EyedropperColorband_Context userdata = {C, eye}; + int p1[2] = {eye->last_x, eye->last_y}; + int p2[2] = {mx, my}; + BLI_bitmap_draw_2d_line_v2v2i(p1, p2, eyedropper_colorband_sample_callback, &userdata); +} + +static void eyedropper_colorband_exit(bContext *C, wmOperator *op) +{ + WM_cursor_modal_restore(CTX_wm_window(C)); + + if (op->customdata) { + EyedropperColorband *eye = op->customdata; + MEM_freeN(eye->color_buffer); + MEM_freeN(eye); + op->customdata = NULL; + } +} + +static void eyedropper_colorband_apply(bContext *C, wmOperator *op) +{ + EyedropperColorband *eye = op->customdata; + BKE_colorband_init_from_table_rgba(eye->color_band, eye->color_buffer, eye->color_buffer_len); + RNA_property_update(C, &eye->ptr, eye->prop); +} + +static void eyedropper_colorband_cancel(bContext *C, wmOperator *op) +{ + EyedropperColorband *eye = op->customdata; + *eye->color_band = eye->init_color_band; + RNA_property_update(C, &eye->ptr, eye->prop); + eyedropper_colorband_exit(C, op); +} + +/* main modal status check */ +static int eyedropper_colorband_modal(bContext *C, wmOperator *op, const wmEvent *event) +{ + EyedropperColorband *eye = op->customdata; + /* handle modal keymap */ + if (event->type == EVT_MODAL_MAP) { + switch (event->val) { + case EYE_MODAL_CANCEL: + eyedropper_colorband_cancel(C, op); + return OPERATOR_CANCELLED; + case EYE_MODAL_SAMPLE_CONFIRM: + eyedropper_colorband_sample_segment(C, eye, event->x, event->y); + eyedropper_colorband_apply(C, op); + eyedropper_colorband_exit(C, op); + return OPERATOR_FINISHED; + case EYE_MODAL_SAMPLE_BEGIN: + /* enable accum and make first sample */ + eye->sample_start = true; + eyedropper_colorband_sample_point(C, eye, event->x, event->y); + eyedropper_colorband_apply(C, op); + eye->last_x = event->x; + eye->last_y = event->y; + break; + case EYE_MODAL_SAMPLE_RESET: + break; + } + } + else if (event->type == MOUSEMOVE) { + if (eye->sample_start) { + eyedropper_colorband_sample_segment(C, eye, event->x, event->y); + eyedropper_colorband_apply(C, op); + } + } + return OPERATOR_RUNNING_MODAL; +} + +static int eyedropper_colorband_point_modal(bContext *C, wmOperator *op, const wmEvent *event) +{ + EyedropperColorband *eye = op->customdata; + /* handle modal keymap */ + if (event->type == EVT_MODAL_MAP) { + switch (event->val) { + case EYE_MODAL_POINT_CANCEL: + eyedropper_colorband_cancel(C, op); + return OPERATOR_CANCELLED; + case EYE_MODAL_POINT_CONFIRM: + eyedropper_colorband_apply(C, op); + eyedropper_colorband_exit(C, op); + return OPERATOR_FINISHED; + case EYE_MODAL_POINT_REMOVE_LAST: + if (eye->color_buffer_len > 0) { + eye->color_buffer_len -= 1; + eyedropper_colorband_apply(C, op); + } + break; + case EYE_MODAL_POINT_SAMPLE: + eyedropper_colorband_sample_point(C, eye, event->x, event->y); + eyedropper_colorband_apply(C, op); + if (eye->color_buffer_len == MAXCOLORBAND ) { + eyedropper_colorband_exit(C, op); + return OPERATOR_FINISHED; + } + break; + case EYE_MODAL_SAMPLE_RESET: + *eye->color_band = eye->init_color_band; + RNA_property_update(C, &eye->ptr, eye->prop); + eye->color_buffer_len = 0; + break; + } + } + return OPERATOR_RUNNING_MODAL; +} + + +/* Modal Operator init */ +static int eyedropper_colorband_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event)) +{ + /* init */ + if (eyedropper_colorband_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_colorband_exit(C, op); + return OPERATOR_CANCELLED; + } +} + +/* Repeat operator */ +static int eyedropper_colorband_exec(bContext *C, wmOperator *op) +{ + /* init */ + if (eyedropper_colorband_init(C, op)) { + + /* do something */ + + /* cleanup */ + eyedropper_colorband_exit(C, op); + + return OPERATOR_FINISHED; + } + else { + return OPERATOR_CANCELLED; + } +} + +void UI_OT_eyedropper_colorband(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Eyedropper colorband"; + ot->idname = "UI_OT_eyedropper_colorband"; + ot->description = "Sample a color band"; + + /* api callbacks */ + ot->invoke = eyedropper_colorband_invoke; + ot->modal = eyedropper_colorband_modal; + ot->cancel = eyedropper_colorband_cancel; + ot->exec = eyedropper_colorband_exec; + + /* flags */ + ot->flag = OPTYPE_BLOCKING | OPTYPE_INTERNAL; + + /* properties */ +} + +void UI_OT_eyedropper_colorband_point(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Eyedropper colorband (points)"; + ot->idname = "UI_OT_eyedropper_colorband_point"; + ot->description = "Pointsample a color band"; + + /* api callbacks */ + ot->invoke = eyedropper_colorband_invoke; + ot->modal = eyedropper_colorband_point_modal; + ot->cancel = eyedropper_colorband_cancel; + ot->exec = eyedropper_colorband_exec; + + /* flags */ + ot->flag = OPTYPE_BLOCKING | OPTYPE_INTERNAL; + + /* properties */ +} |