254 lines
7.2 KiB
C++
254 lines
7.2 KiB
C++
/****************************************************************************
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* apps/include/graphics/nxwidgets/crlepalettebitmap.hxx
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CRLEPALETTBITMAP_HXX
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#define __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CRLEPALETTBITMAP_HXX
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <nuttx/nx/nxglib.h>
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#include "graphics/nxwidgets/nxconfig.hxx"
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#include "graphics/nxwidgets/ibitmap.hxx"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Implementation Classes
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****************************************************************************/
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#if defined(__cplusplus)
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namespace NXWidgets
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{
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/**
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* One Run-Length Encoded (RLE) value
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*/
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struct SRlePaletteBitmapEntry
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{
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uint8_t npixels; /**< Number of pixels */
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uint8_t lookup; /**< Pixel RGB lookup index */
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};
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/**
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* Run-Length Encoded (RLE), Paletted Bitmap Structure
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*/
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struct SRlePaletteBitmap
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{
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uint8_t bpp; /**< Bits per pixel */
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uint8_t fmt; /**< Color format */
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uint8_t nlut; /**< Number of colors in the Look-Up Table (LUT) */
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nxgl_coord_t width; /**< Width in pixels */
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nxgl_coord_t height; /**< Height in rows */
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FAR const void *lut[2]; /**< Pointers to the beginning of the Look-Up Tables (LUTs) */
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/**
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* The pointer to the beginning of the RLE data
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*/
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FAR const struct SRlePaletteBitmapEntry *data;
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};
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/**
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* Class providing bitmap accessor for a bitmap represented by SRlePaletteBitmap.
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*/
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class CRlePaletteBitmap : public IBitmap
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{
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protected:
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/**
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* The bitmap that is being managed
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*/
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FAR const struct SRlePaletteBitmap *m_bitmap; /**< The bitmap that is being managed */
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/**
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* Accessor state data
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*/
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nxgl_coord_t m_row; /**< Logical row number */
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nxgl_coord_t m_col; /**< Logical column number */
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uint8_t m_remaining; /**< Number of bytes remaining in current entry */
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FAR const void *m_lut; /**< The selected LUT */
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FAR const struct SRlePaletteBitmapEntry *m_rle; /**< RLE entry being processed */
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/**
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* Reset to the beginning of the image
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*/
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void startOfImage(void);
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/**
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* Advance position data ahead. Called after npixels have
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* have been consume.
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*
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* @param npixels The number of pixels to advance
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* @return False if this goes beyond the end of the image
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*/
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bool advancePosition(nxgl_coord_t npixels);
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/**
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* Seek ahead the specific number of pixels -- discarding
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* and advancing.
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*
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* @param npixels The number of pixels to skip
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* @return False if this goes beyond the end of the image
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*/
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bool skipPixels(nxgl_coord_t npixels);
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/** Seek to the beginning of the next row
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*
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* @return False if this was the last row of the image
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*/
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bool nextRow(void);
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/** Seek to the beignning specific row
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*
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* @param row The row number to seek to
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* @return False if this goes beyond the end of the image
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*/
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bool seekRow(nxgl_coord_t row);
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/** Copy the pixels from the current RLE entry the specified number of times.
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*
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* @param npixels The number of pixels to copy. Must be less than or equal
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* to m_remaining.
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* @param data The memory location provided by the caller
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* in which to return the data. This should be at least
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* (getWidth()*getBitsPerPixl() + 7)/8 bytes in length
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* and properly aligned for the pixel color format.
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*/
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void copyColor(nxgl_coord_t npixels, FAR void *data);
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/** Copy pixels from the current position
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*
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* @param npixels The number of pixels to copy
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* @param data The memory location provided by the caller
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* in which to return the data. This should be at least
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* (getWidth()*getBitsPerPixl() + 7)/8 bytes in length
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* and properly aligned for the pixel color format.
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* @return False if this goes beyond the end of the image
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*/
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bool copyPixels(nxgl_coord_t npixels, FAR void *data);
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public:
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/**
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* Constructor.
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*
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* @param bitmap The bitmap structure being wrapped.
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*/
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CRlePaletteBitmap(const struct SRlePaletteBitmap *bitmap);
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/**
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* Destructor.
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*/
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inline ~CRlePaletteBitmap(void) {}
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/**
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* Get the bitmap's color format.
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*
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* @return The bitmap's width.
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*/
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const uint8_t getColorFormat(void) const;
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/**
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* Get the bitmap's color format.
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*
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* @return The bitmap's color format.
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*/
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const uint8_t getBitsPerPixel(void) const;
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/**
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* Get the bitmap's width (in pixels/columns).
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*
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* @return The bitmap's pixel depth.
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*/
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const nxgl_coord_t getWidth(void) const;
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/**
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* Get the bitmap's height (in rows).
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*
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* @return The bitmap's height.
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*/
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const nxgl_coord_t getHeight(void) const;
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/**
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* Get the bitmap's width (in bytes).
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*
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* @return The bitmap's width.
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*/
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const size_t getStride(void) const;
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/**
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* Use the colors associated with a selected image.
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*
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* @param selected. true: Use colors for a selected widget,
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* false: Use normal (default) colors.
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*/
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void setSelected(bool selected);
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/**
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* Get one row from the bit map image using the selected colors.
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*
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* @param x The offset into the row to get
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* @param y The row number to get
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* @param width The number of pixels to get from the row
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* @param data The memory location provided by the caller
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* in which to return the data. This should be at least
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* (getWidth()*getBitsPerPixl() + 7)/8 bytes in length
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* and properly aligned for the pixel color format.
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* @param True if the run was returned successfully.
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*/
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bool getRun(nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width,
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FAR void *data);
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};
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}
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#endif // __cplusplus
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#endif // __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CRLEPALETTBITMAP_HXX
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