490 lines
16 KiB
C
490 lines
16 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Kevin Matocha
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-bindings/bitmaptools/__init__.h"
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#include "shared-bindings/displayio/Bitmap.h"
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#include "shared-module/displayio/Bitmap.h"
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#include "py/runtime.h"
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#include "py/mperrno.h"
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#include "math.h"
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#include "stdlib.h"
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void common_hal_bitmaptools_rotozoom(displayio_bitmap_t *self, int16_t ox, int16_t oy,
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int16_t dest_clip0_x, int16_t dest_clip0_y,
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int16_t dest_clip1_x, int16_t dest_clip1_y,
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displayio_bitmap_t *source, int16_t px, int16_t py,
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int16_t source_clip0_x, int16_t source_clip0_y,
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int16_t source_clip1_x, int16_t source_clip1_y,
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float angle,
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float scale,
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uint32_t skip_index, bool skip_index_none) {
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// Copies region from source to the destination bitmap, including rotation,
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// scaling and clipping of either the source or destination regions
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//
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// *self: destination bitmap
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// ox: the (ox, oy) destination point where the source (px,py) point is placed
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// oy:
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// dest_clip0: (x,y) is the corner of the clip window on the destination bitmap
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// dest_clip1: (x,y) is the other corner of the clip window of the destination bitmap
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// *source: the source bitmap
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// px: the (px, py) point of rotation of the source bitmap
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// py:
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// source_clip0: (x,y) is the corner of the clip window on the source bitmap
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// source_clip1: (x,y) is the other of the clip window on the source bitmap
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// angle: angle of rotation in radians, positive is clockwise
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// scale: scale factor
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// skip_index: color index that should be ignored (and not copied over)
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// skip_index_none: if skip_index_none is True, then all color indexes should be copied
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// (that is, no color indexes should be skipped)
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// Copy complete "source" bitmap into "self" bitmap at location x,y in the "self"
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// Add a boolean to determine if all values are copied, or only if non-zero
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// If skip_value is encountered in the source bitmap, it will not be copied.
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// If skip_value is `None`, then all pixels are copied.
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// # Credit from https://github.com/wernsey/bitmap
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// # MIT License from
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// # * Copyright (c) 2017 Werner Stoop <wstoop@gmail.com>
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// #
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// # *
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// # * #### `void bm_rotate_blit(Bitmap *dst, int ox, int oy, Bitmap *src, int px, int py, double angle, double scale);`
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// # *
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// # * Rotates a source bitmap `src` around a pivot point `px,py` and blits it onto a destination bitmap `dst`.
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// # *
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// # * The bitmap is positioned such that the point `px,py` on the source is at the offset `ox,oy` on the destination.
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// # *
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// # * The `angle` is clockwise, in radians. The bitmap is also scaled by the factor `scale`.
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// #
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// # void bm_rotate_blit(Bitmap *dst, int ox, int oy, Bitmap *src, int px, int py, double angle, double scale);
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// # /*
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// # Reference:
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// # "Fast Bitmap Rotation and Scaling" By Steven Mortimer, Dr Dobbs' Journal, July 01, 2001
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// # http://www.drdobbs.com/architecture-and-design/fast-bitmap-rotation-and-scaling/184416337
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// # See also http://www.efg2.com/Lab/ImageProcessing/RotateScanline.htm
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// # */
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if (self->read_only) {
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mp_raise_RuntimeError(translate("Read-only object"));
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}
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int16_t x,y;
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int16_t minx = dest_clip1_x;
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int16_t miny = dest_clip1_y;
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int16_t maxx = dest_clip0_x;
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int16_t maxy = dest_clip0_y;
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float sinAngle = sinf(angle);
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float cosAngle = cosf(angle);
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float dx, dy;
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/* Compute the position of where each corner on the source bitmap
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will be on the destination to get a bounding box for scanning */
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dx = -cosAngle * px * scale + sinAngle * py * scale + ox;
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dy = -sinAngle * px * scale - cosAngle * py * scale + oy;
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if (dx < minx) {
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minx = (int16_t)dx;
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}
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if (dx > maxx) {
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maxx = (int16_t)dx;
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}
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if (dy < miny) {
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miny = (int16_t)dy;
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}
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if (dy > maxy) {
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maxy = (int16_t)dy;
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}
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dx = cosAngle * (source->width - px) * scale + sinAngle * py * scale + ox;
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dy = sinAngle * (source->width - px) * scale - cosAngle * py * scale + oy;
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if (dx < minx) {
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minx = (int16_t)dx;
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}
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if (dx > maxx) {
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maxx = (int16_t)dx;
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}
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if (dy < miny) {
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miny = (int16_t)dy;
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}
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if (dy > maxy) {
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maxy = (int16_t)dy;
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}
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dx = cosAngle * (source->width - px) * scale - sinAngle * (source->height - py) * scale + ox;
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dy = sinAngle * (source->width - px) * scale + cosAngle * (source->height - py) * scale + oy;
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if (dx < minx) {
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minx = (int16_t)dx;
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}
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if (dx > maxx) {
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maxx = (int16_t)dx;
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}
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if (dy < miny) {
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miny = (int16_t)dy;
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}
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if (dy > maxy) {
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maxy = (int16_t)dy;
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}
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dx = -cosAngle * px * scale - sinAngle * (source->height - py) * scale + ox;
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dy = -sinAngle * px * scale + cosAngle * (source->height - py) * scale + oy;
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if (dx < minx) {
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minx = (int16_t)dx;
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}
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if (dx > maxx) {
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maxx = (int16_t)dx;
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}
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if (dy < miny) {
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miny = (int16_t)dy;
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}
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if (dy > maxy) {
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maxy = (int16_t)dy;
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}
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/* Clipping */
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if (minx < dest_clip0_x) {
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minx = dest_clip0_x;
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}
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if (maxx > dest_clip1_x - 1) {
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maxx = dest_clip1_x - 1;
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}
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if (miny < dest_clip0_y) {
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miny = dest_clip0_y;
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}
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if (maxy > dest_clip1_y - 1) {
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maxy = dest_clip1_y - 1;
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}
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float dvCol = cosAngle / scale;
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float duCol = sinAngle / scale;
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float duRow = dvCol;
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float dvRow = -duCol;
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float startu = px - (ox * dvCol + oy * duCol);
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float startv = py - (ox * dvRow + oy * duRow);
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float rowu = startu + miny * duCol;
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float rowv = startv + miny * dvCol;
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for (y = miny; y <= maxy; y++) {
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float u = rowu + minx * duRow;
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float v = rowv + minx * dvRow;
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for (x = minx; x <= maxx; x++) {
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if (u >= source_clip0_x && u < source_clip1_x && v >= source_clip0_y && v < source_clip1_y) {
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uint32_t c = common_hal_displayio_bitmap_get_pixel(source, u, v);
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if ((skip_index_none) || (c != skip_index)) {
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common_hal_displayio_bitmap_set_pixel(self, x, y, c);
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}
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}
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u += duRow;
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v += dvRow;
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}
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rowu += duCol;
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rowv += dvCol;
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}
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}
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int16_t constrain(int16_t input, int16_t min, int16_t max) {
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// constrain the input between the min and max values
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if (input < min) {
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return min;
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}
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if (input > max) {
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return max;
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}
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return input;
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}
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void common_hal_bitmaptools_fill_region(displayio_bitmap_t *destination,
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int16_t x1, int16_t y1,
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int16_t x2, int16_t y2,
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uint32_t value) {
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// writes the value (a bitmap color index) into a bitmap in the specified rectangular region
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//
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// input checks should ensure that x1 < x2 and y1 < y2 and are within the bitmap region
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if (destination->read_only) {
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mp_raise_RuntimeError(translate("Read-only object"));
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}
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// Ensure x1 < x2 and y1 < y2
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if (x1 > x2) {
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int16_t temp = x2;
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x2 = x1;
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x1 = temp;
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}
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if (y1 > y2) {
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int16_t temp = y2;
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y2 = y1;
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y1 = temp;
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}
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// constrain to bitmap dimensions
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x1 = constrain(x1, 0, destination->width);
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x2 = constrain(x2, 0, destination->width);
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y1 = constrain(y1, 0, destination->height);
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y2 = constrain(y2, 0, destination->height);
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// update the dirty rectangle
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displayio_bitmap_set_dirty_area(destination, x1, y1, x2, y2);
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int16_t x, y;
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for (x = x1; x < x2; x++) {
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for (y = y1; y < y2; y++) {
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displayio_bitmap_write_pixel(destination, x, y, value);
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}
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}
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}
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void common_hal_bitmaptools_draw_line(displayio_bitmap_t *destination,
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int16_t x0, int16_t y0,
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int16_t x1, int16_t y1,
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uint32_t value) {
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if (destination->read_only) {
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mp_raise_RuntimeError(translate("Read-only object"));
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}
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//
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// adapted from Adafruit_CircuitPython_Display_Shapes.Polygon._line
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//
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// update the dirty rectangle
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int16_t xbb0, xbb1, ybb0, ybb1;
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if (x0 < x1) {
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xbb0 = x0;
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xbb1 = x1 + 1;
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} else {
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xbb0 = x1;
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xbb1 = x0 + 1;
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}
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if (y0 < y1) {
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ybb0 = y0;
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ybb1 = y1 + 1;
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} else {
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ybb0 = y1;
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ybb1 = y0 + 1;
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}
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xbb0 = constrain(xbb0, 0, destination->width);
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xbb1 = constrain(xbb1, 0, destination->width);
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ybb0 = constrain(ybb0, 0, destination->height);
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ybb1 = constrain(ybb1, 0, destination->height);
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displayio_bitmap_set_dirty_area(destination, xbb0, ybb0, xbb1, ybb1);
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int16_t temp, x, y;
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if (x0 == x1) { // vertical line
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if (y0 > y1) { // ensure y1 > y0
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temp = y0;
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y0 = y1;
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y1 = temp;
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}
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for (y = y0; y < (y1 + 1); y++) { // write a horizontal line
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displayio_bitmap_write_pixel(destination, x0, y, value);
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}
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} else if (y0 == y1) { // horizontal line
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if (x0 > x1) { // ensure y1 > y0
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temp = x0;
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x0 = x1;
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x1 = temp;
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}
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for (x = x0; x < (x1 + 1); x++) { // write a horizontal line
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displayio_bitmap_write_pixel(destination, x, y0, value);
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}
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} else {
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bool steep;
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steep = (abs(y1 - y0) > abs(x1 - x0));
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if (steep) { // flip x0<->y0 and x1<->y1
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temp = x0;
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x0 = y0;
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y0 = temp;
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temp = x1;
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x1 = y1;
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y1 = temp;
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}
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if (x0 > x1) { // flip x0<->x1 and y0<->y1
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temp = x0;
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x0 = x1;
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x1 = temp;
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temp = y0;
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y0 = y1;
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y1 = temp;
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}
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int16_t dx, dy, ystep;
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dx = x1 - x0;
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dy = abs(y1 - y0);
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float err = dx / 2;
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if (y0 < y1) {
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ystep = 1;
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} else {
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ystep = -1;
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}
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for (x = x0; x < (x1 + 1); x++) {
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if (steep) {
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displayio_bitmap_write_pixel(destination, y0, x, value);
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} else {
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displayio_bitmap_write_pixel(destination, x, y0, value);
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}
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err -= dy;
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if (err < 0) {
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y0 += ystep;
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err += dx;
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}
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}
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}
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}
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void common_hal_bitmaptools_arrayblit(displayio_bitmap_t *self, void *data, int element_size, int x1, int y1, int x2, int y2, bool skip_specified, uint32_t skip_value) {
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uint32_t mask = (1 << common_hal_displayio_bitmap_get_bits_per_value(self)) - 1;
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for (int y = y1; y < y2; y++) {
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for (int x = x1; x < x2; x++) {
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uint32_t value;
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switch (element_size) {
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default:
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case 1:
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value = *(uint8_t *)data;
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data = (void *)((uint8_t *)data + 1);
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break;
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case 2:
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value = *(uint16_t *)data;
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data = (void *)((uint16_t *)data + 1);
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break;
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case 4:
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value = *(uint32_t *)data;
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data = (void *)((uint32_t *)data + 1);
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break;
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}
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if (!skip_specified || value != skip_value) {
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displayio_bitmap_write_pixel(self, x, y, value & mask);
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}
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}
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}
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}
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void common_hal_bitmaptools_readinto(displayio_bitmap_t *self, pyb_file_obj_t *file, int element_size, int bits_per_pixel, bool reverse_pixels_in_element, bool swap_bytes) {
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uint32_t mask = (1 << common_hal_displayio_bitmap_get_bits_per_value(self)) - 1;
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if (self->read_only) {
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mp_raise_RuntimeError(translate("Read-only object"));
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}
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size_t elements_per_row = (self->width * bits_per_pixel + element_size * 8 - 1) / (element_size * 8);
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size_t rowsize = element_size * elements_per_row;
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size_t rowsize_in_u32 = (rowsize + sizeof(uint32_t) - 1) / sizeof(uint32_t);
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size_t rowsize_in_u16 = (rowsize + sizeof(uint16_t) - 1) / sizeof(uint16_t);
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for (int y = 0; y < self->height; y++) {
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uint32_t rowdata32[rowsize_in_u32];
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uint16_t *rowdata16 = (uint16_t *)rowdata32;
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uint8_t *rowdata8 = (uint8_t *)rowdata32;
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UINT bytes_read = 0;
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if (f_read(&file->fp, rowdata32, rowsize, &bytes_read) != FR_OK || bytes_read != rowsize) {
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mp_raise_OSError(MP_EIO);
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}
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if (swap_bytes) {
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switch (element_size) {
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case 2:
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for (size_t i = 0; i < rowsize_in_u16; i++) {
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rowdata16[i] = __builtin_bswap16(rowdata16[i]);
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}
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break;
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case 4:
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for (size_t i = 0; i < rowsize_in_u32; i++) {
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rowdata32[i] = __builtin_bswap32(rowdata32[i]);
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}
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default:
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break;
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}
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}
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for (int x = 0; x < self->width; x++) {
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int value = 0;
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switch (bits_per_pixel) {
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case 1: {
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int byte_offset = x / 8;
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int bit_offset = reverse_pixels_in_element ? (7 - x % 8) : x % 8;
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value = (rowdata8[byte_offset] >> bit_offset) & 1;
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break;
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}
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case 2: {
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int byte_offset = x / 4;
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int bit_offset = 2 * (reverse_pixels_in_element ? (3 - x % 4) : x % 4);
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value = (rowdata8[byte_offset] >> bit_offset) & 3;
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break;
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}
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case 4: {
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int byte_offset = x / 2;
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int bit_offset = 4 * (reverse_pixels_in_element ? (1 - x % 2) : x % 2);
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value = (rowdata8[byte_offset] >> bit_offset) & 7;
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break;
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}
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case 8:
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value = rowdata8[x];
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break;
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case 16:
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value = rowdata16[x];
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break;
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case 24:
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value = (rowdata8[x * 3] << 16) | (rowdata8[x * 3 + 1] << 8) | (rowdata8[x * 3 + 2] << 8);
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break;
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case 32:
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value = rowdata32[x];
|
|
break;
|
|
}
|
|
|
|
displayio_bitmap_write_pixel(self, x, y, value & mask);
|
|
}
|
|
}
|
|
|
|
displayio_bitmap_set_dirty_area(self, 0, 0, self->width, self->height);
|
|
}
|