circuitpython/shared-module/displayio/Group.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "shared-bindings/displayio/Group.h"
#include "py/runtime.h"
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#include "shared-bindings/displayio/TileGrid.h"
void common_hal_displayio_group_construct(displayio_group_t* self, uint32_t max_size, uint32_t scale, mp_int_t x, mp_int_t y) {
displayio_group_child_t* children = m_new(displayio_group_child_t, max_size);
displayio_group_construct(self, children, max_size, scale, x, y);
}
uint32_t common_hal_displayio_group_get_scale(displayio_group_t* self) {
return self->scale;
}
bool displayio_group_get_previous_area(displayio_group_t *self, displayio_area_t* area) {
bool first = true;
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for (size_t i = 0; i < self->size; i++) {
mp_obj_t layer = self->children[i].native;
displayio_area_t layer_area;
if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
if (!displayio_tilegrid_get_previous_area(layer, &layer_area)) {
continue;
}
} else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
if (!displayio_group_get_previous_area(layer, &layer_area)) {
continue;
}
}
if (first) {
displayio_area_copy(&layer_area, area);
first = false;
} else {
displayio_area_expand(area, &layer_area);
}
}
if (self->item_removed) {
if (first) {
displayio_area_copy(&self->dirty_area, area);
first = false;
} else {
displayio_area_expand(area, &self->dirty_area);
}
}
return !first;
}
static void _update_child_transforms(displayio_group_t* self) {
if (!self->in_group) {
return;
}
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for (size_t i = 0; i < self->size; i++) {
mp_obj_t layer = self->children[i].native;
if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
displayio_tilegrid_update_transform(layer, &self->absolute_transform);
} else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
displayio_group_update_transform(layer, &self->absolute_transform);
}
}
}
void displayio_group_update_transform(displayio_group_t *self,
const displayio_buffer_transform_t* parent_transform) {
self->in_group = parent_transform != NULL;
if (self->in_group) {
int16_t x = self->x;
int16_t y = self->y;
if (parent_transform->transpose_xy) {
x = y;
y = self->x;
}
self->absolute_transform.x = parent_transform->x + parent_transform->dx * x;
self->absolute_transform.y = parent_transform->y + parent_transform->dy * y;
self->absolute_transform.dx = parent_transform->dx * self->scale;
self->absolute_transform.dy = parent_transform->dy * self->scale;
self->absolute_transform.transpose_xy = parent_transform->transpose_xy;
self->absolute_transform.mirror_x = parent_transform->mirror_x;
self->absolute_transform.mirror_y = parent_transform->mirror_y;
self->absolute_transform.scale = parent_transform->scale * self->scale;
}
_update_child_transforms(self);
}
void common_hal_displayio_group_set_scale(displayio_group_t* self, uint32_t scale) {
if (self->scale == scale) {
return;
}
uint8_t parent_scale = self->absolute_transform.scale / self->scale;
self->absolute_transform.dx = self->absolute_transform.dx / self->scale * scale;
self->absolute_transform.dy = self->absolute_transform.dy / self->scale * scale;
self->absolute_transform.scale = parent_scale * scale;
self->scale = scale;
_update_child_transforms(self);
}
mp_int_t common_hal_displayio_group_get_x(displayio_group_t* self) {
return self->x;
}
void common_hal_displayio_group_set_x(displayio_group_t* self, mp_int_t x) {
if (self->x == x) {
return;
}
if (self->absolute_transform.transpose_xy) {
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int16_t dy = self->absolute_transform.dy / self->scale;
self->absolute_transform.y += dy * (x - self->x);
} else {
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int16_t dx = self->absolute_transform.dx / self->scale;
self->absolute_transform.x += dx * (x - self->x);
}
self->x = x;
_update_child_transforms(self);
}
mp_int_t common_hal_displayio_group_get_y(displayio_group_t* self) {
return self->y;
}
void common_hal_displayio_group_set_y(displayio_group_t* self, mp_int_t y) {
if (self->y == y) {
return;
}
if (self->absolute_transform.transpose_xy) {
int8_t dx = self->absolute_transform.dx / self->scale;
self->absolute_transform.x += dx * (y - self->y);
} else {
int8_t dy = self->absolute_transform.dy / self->scale;
self->absolute_transform.y += dy * (y - self->y);
}
self->y = y;
_update_child_transforms(self);
}
static mp_obj_t _add_layer(displayio_group_t* self, mp_obj_t layer) {
mp_obj_t native_layer = mp_instance_cast_to_native_base(layer, &displayio_group_type);
if (native_layer == MP_OBJ_NULL) {
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native_layer = mp_instance_cast_to_native_base(layer, &displayio_tilegrid_type);
if (native_layer == MP_OBJ_NULL) {
mp_raise_ValueError(translate("Layer must be a Group or TileGrid subclass."));
}
displayio_tilegrid_t* tilegrid = native_layer;
if (tilegrid->in_group) {
mp_raise_ValueError(translate("Layer already in a group."));
} else {
tilegrid->in_group = true;
}
displayio_tilegrid_update_transform(tilegrid, &self->absolute_transform);
} else {
displayio_group_t* group = native_layer;
if (group->in_group) {
mp_raise_ValueError(translate("Layer already in a group."));
} else {
group->in_group = true;
}
displayio_group_update_transform(group, &self->absolute_transform);
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}
return native_layer;
}
static void _remove_layer(displayio_group_t* self, size_t index) {
mp_obj_t layer = self->children[index].native;
displayio_area_t layer_area;
bool rendered_last_frame = false;
if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
displayio_tilegrid_t* tilegrid = layer;
rendered_last_frame = displayio_tilegrid_get_previous_area(tilegrid, &layer_area);
displayio_tilegrid_update_transform(tilegrid, NULL);
} else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
displayio_group_t* group = layer;
rendered_last_frame = displayio_group_get_previous_area(group, &layer_area);
displayio_group_update_transform(group, NULL);
}
if (!rendered_last_frame) {
return;
}
if (!self->item_removed) {
displayio_area_copy(&layer_area, &self->dirty_area);
} else {
displayio_area_expand(&self->dirty_area, &layer_area);
}
self->item_removed = true;
}
void common_hal_displayio_group_insert(displayio_group_t* self, size_t index, mp_obj_t layer) {
if (self->size == self->max_size) {
mp_raise_RuntimeError(translate("Group full"));
}
mp_obj_t native_layer = _add_layer(self, layer);
// Shift everything right.
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for (size_t i = self->size; i > index; i--) {
self->children[i] = self->children[i - 1];
}
self->children[index].native = native_layer;
self->children[index].original = layer;
self->size++;
}
mp_obj_t common_hal_displayio_group_pop(displayio_group_t* self, size_t index) {
self->size--;
mp_obj_t item = self->children[index].original;
_remove_layer(self, index);
// Shift everything left.
for (size_t i = index; i < self->size; i++) {
self->children[i] = self->children[i + 1];
}
self->children[self->size].native = NULL;
self->children[self->size].original = NULL;
return item;
}
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mp_int_t common_hal_displayio_group_index(displayio_group_t* self, mp_obj_t layer) {
for (size_t i = 0; i < self->size; i++) {
if (self->children[i].original == layer) {
return i;
}
}
return -1;
}
size_t common_hal_displayio_group_get_len(displayio_group_t* self) {
return self->size;
}
mp_obj_t common_hal_displayio_group_get(displayio_group_t* self, size_t index) {
return self->children[index].original;
}
void common_hal_displayio_group_set(displayio_group_t* self, size_t index, mp_obj_t layer) {
mp_obj_t native_layer = _add_layer(self, layer);
_remove_layer(self, index);
self->children[index].native = native_layer;
self->children[index].original = layer;
}
void displayio_group_construct(displayio_group_t* self, displayio_group_child_t* child_array, uint32_t max_size, uint32_t scale, mp_int_t x, mp_int_t y) {
self->x = x;
self->y = y;
self->children = child_array;
self->max_size = max_size;
self->item_removed = false;
self->scale = scale;
self->in_group = false;
}
bool displayio_group_fill_area(displayio_group_t *self, const displayio_area_t* area, uint32_t* mask, uint32_t* buffer) {
// Track if any of the layers finishes filling in the given area. We can ignore any remaining
// layers at that point.
bool full_coverage = false;
for (int32_t i = self->size - 1; i >= 0 ; i--) {
mp_obj_t layer = self->children[i].native;
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if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
if (displayio_tilegrid_fill_area(layer, area, mask, buffer)) {
full_coverage = true;
break;
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}
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} else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
if (displayio_group_fill_area(layer, area, mask, buffer)) {
full_coverage = true;
break;
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}
}
}
return full_coverage;
}
void displayio_group_finish_refresh(displayio_group_t *self) {
self->item_removed = false;
for (int32_t i = self->size - 1; i >= 0 ; i--) {
mp_obj_t layer = self->children[i].native;
if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
displayio_tilegrid_finish_refresh(layer);
} else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
displayio_group_finish_refresh(layer);
}
}
}
displayio_area_t* displayio_group_get_refresh_areas(displayio_group_t *self, displayio_area_t* tail) {
if (self->item_removed) {
self->dirty_area.next = tail;
tail = &self->dirty_area;
}
for (int32_t i = self->size - 1; i >= 0 ; i--) {
mp_obj_t layer = self->children[i].native;
if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
tail = displayio_tilegrid_get_refresh_areas(layer, tail);
} else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
tail = displayio_group_get_refresh_areas(layer, tail);
}
}
return tail;
}