1 files changed, 148 insertions, 0 deletions
diff --git a/shared-module/displayio/TileGrid.c b/shared-module/displayio/TileGrid.c
new file mode 100644
index 000000000..b90603afe
--- /dev/null
+++ b/shared-module/displayio/TileGrid.c
@@ -0,0 +1,148 @@
+/*
+ * 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/TileGrid.h"
+
+#include "shared-bindings/displayio/Bitmap.h"
+#include "shared-bindings/displayio/ColorConverter.h"
+#include "shared-bindings/displayio/OnDiskBitmap.h"
+#include "shared-bindings/displayio/Palette.h"
+#include "shared-bindings/displayio/Shape.h"
+
+void common_hal_displayio_tilegrid_construct(displayio_tilegrid_t *self, mp_obj_t bitmap,
+        uint16_t bitmap_width_in_tiles,
+        mp_obj_t pixel_shader, uint16_t width, uint16_t height,
+        uint16_t tile_width, uint16_t tile_height, uint16_t x, uint16_t y, uint8_t default_tile) {
+    uint32_t total_tiles = width * height;
+    // Sprites will only have one tile so save a little memory by inlining values in the pointer.
+    uint8_t inline_tiles = sizeof(uint8_t*);
+    if (total_tiles <= inline_tiles) {
+        self->inline_tiles = true;
+    } else {
+        self->tiles = (uint8_t*) m_malloc(total_tiles, false);
+        self->inline_tiles = false;
+    }
+    self->bitmap_width_in_tiles = bitmap_width_in_tiles;
+    self->width_in_tiles = width;
+    self->height_in_tiles = height;
+    self->total_width = width * tile_width;
+    self->total_height = height * tile_height;
+    self->tile_width = tile_width;
+    self->tile_height = tile_height;
+    self->bitmap = bitmap;
+    self->pixel_shader = pixel_shader;
+    self->x = x;
+    self->y = y;
+}
+
+void common_hal_displayio_tilegrid_get_position(displayio_tilegrid_t *self, int16_t* x, int16_t* y) {
+    *x = self->x;
+    *y = self->y;
+}
+
+void common_hal_displayio_tilegrid_set_position(displayio_tilegrid_t *self, int16_t x, int16_t y) {
+    self->x = x;
+    self->y = y;
+    self->needs_refresh = true;
+}
+
+mp_obj_t common_hal_displayio_tilegrid_get_pixel_shader(displayio_tilegrid_t *self) {
+    return self->pixel_shader;
+}
+
+void common_hal_displayio_tilegrid_set_pixel_shader(displayio_tilegrid_t *self, mp_obj_t pixel_shader) {
+    self->pixel_shader = pixel_shader;
+    self->needs_refresh = true;
+}
+
+bool displayio_tilegrid_get_pixel(displayio_tilegrid_t *self, int16_t x, int16_t y, uint16_t* pixel) {
+    x -= self->x;
+    y -= self->y;
+    if (y < 0 || y >= self->total_height || x >= self->total_width || x < 0) {
+        return false;
+    }
+
+    uint8_t* tiles = self->tiles;
+    if (self->inline_tiles) {
+        tiles = (uint8_t*) &self->tiles;
+    }
+    if (tiles == NULL) {
+        return false;
+    }
+    uint16_t tile_location = ((y / self->tile_height + self->top_left_y) % self->height_in_tiles) * self->width_in_tiles + (x / self->tile_width + self->top_left_x) % self->width_in_tiles;
+    uint8_t tile = tiles[tile_location];
+    uint16_t tile_x = tile_x = (tile % self->bitmap_width_in_tiles) * self->tile_width + x % self->tile_width;
+    uint16_t tile_y = tile_y = (tile / self->bitmap_width_in_tiles) * self->tile_height + y % self->tile_height;
+
+    uint32_t value = 0;
+    if (MP_OBJ_IS_TYPE(self->bitmap, &displayio_bitmap_type)) {
+        value = common_hal_displayio_bitmap_get_pixel(self->bitmap, tile_x, tile_y);
+    } else if (MP_OBJ_IS_TYPE(self->bitmap, &displayio_shape_type)) {
+        value = common_hal_displayio_shape_get_pixel(self->bitmap, tile_x, tile_y);
+    } else if (MP_OBJ_IS_TYPE(self->bitmap, &displayio_ondiskbitmap_type)) {
+        value = common_hal_displayio_ondiskbitmap_get_pixel(self->bitmap, tile_x, tile_y);
+    }
+
+    if (self->pixel_shader == mp_const_none) {
+        *pixel = value;
+        return true;
+    } else if (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_palette_type) && displayio_palette_get_color(self->pixel_shader, value, pixel)) {
+        return true;
+    } else if (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_colorconverter_type) && common_hal_displayio_colorconverter_convert(self->pixel_shader, value, pixel)) {
+        return true;
+    }
+
+    return false;
+}
+
+void common_hal_displayio_textgrid_set_tile(displayio_tilegrid_t *self, uint16_t x, uint16_t y, uint8_t tile_index) {
+    uint8_t* tiles = self->tiles;
+    if (self->inline_tiles) {
+        tiles = (uint8_t*) &self->tiles;
+    }
+    if (tiles == NULL) {
+        return;
+    }
+    tiles[y * self->width_in_tiles + x] = tile_index;
+    self->needs_refresh = true;
+}
+
+
+void common_hal_displayio_textgrid_set_top_left(displayio_tilegrid_t *self, uint16_t x, uint16_t y) {
+    self->top_left_x = x;
+    self->top_left_y = y;
+}
+
+bool displayio_tilegrid_needs_refresh(displayio_tilegrid_t *self) {
+    return self->needs_refresh || displayio_palette_needs_refresh(self->pixel_shader);
+}
+
+void displayio_tilegrid_finish_refresh(displayio_tilegrid_t *self) {
+    self->needs_refresh = false;
+    displayio_palette_finish_refresh(self->pixel_shader);
+    // TODO(tannewt): We could double buffer changes to position and move them over here.
+    // That way they won't change during a refresh and tear.
+}