diff options
Diffstat (limited to 'NxWidgets/libnxwidgets/src/cimage.cxx')
-rw-r--r-- | NxWidgets/libnxwidgets/src/cimage.cxx | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/NxWidgets/libnxwidgets/src/cimage.cxx b/NxWidgets/libnxwidgets/src/cimage.cxx new file mode 100644 index 000000000..b57857e66 --- /dev/null +++ b/NxWidgets/libnxwidgets/src/cimage.cxx @@ -0,0 +1,343 @@ +/**************************************************************************** + * NxWidgets/libnxwidgets/include/cimage.cxx + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX, NxWidgets, nor the names of its contributors + * me be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + **************************************************************************** + * + * Portions of this package derive from Woopsi (http://woopsi.org/) and + * portions are original efforts. It is difficult to determine at this + * point what parts are original efforts and which parts derive from Woopsi. + * However, in any event, the work of Antony Dzeryn will be acknowledged + * in most NxWidget files. Thanks Antony! + * + * Copyright (c) 2007-2011, Antony Dzeryn + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the names "Woopsi", "Simian Zombie" nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> +#include <debug.h> + +#include <nuttx/nx/nxglib.h> + +#include "nxconfig.hxx" +#include "cgraphicsport.hxx" +#include "ibitmap.hxx" +#include "cbitmap.hxx" +#include "cimage.hxx" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Method Implementations + ****************************************************************************/ + +using namespace NXWidgets; + +/** + * Constructor for a label containing a string. + * + * @param pWidgetControl The controlling widget for the display + * @param x The x coordinate of the image box, relative to its parent. + * @param y The y coordinate of the image box, relative to its parent. + * @param width The width of the textbox. + * @param height The height of the textbox. + * @param bitmap The source bitmap image. + * @param style The style that the widget should use. If this is not + * specified, the button will use the global default widget + * style. + */ + +CImage::CImage(CWidgetControl *pWidgetControl, nxgl_coord_t x, nxgl_coord_t y, + nxgl_coord_t width, nxgl_coord_t height, FAR IBitmap *bitmap, + CWidgetStyle *style) + : CNxWidget(pWidgetControl, x, y, width, height, 0, style) +{ + // Save the IBitmap instance + + m_bitmap = bitmap; + + // Position the top/lef corner of the bitmap in the top/left corner of the display + + m_origin.x = 0; + m_origin.y = 0; +} + +/** + * Insert the dimensions that this widget wants to have into the rect + * passed in as a parameter. All coordinates are relative to the + * widget's parent. + * + * @param rect Reference to a rect to populate with data. + */ + +void CImage::getPreferredDimensions(CRect &rect) const +{ + nxgl_coord_t width = m_bitmap->getWidth(); + nxgl_coord_t height = m_bitmap->getHeight(); + + if (!m_flags.borderless) + { + width += (m_borderSize.left + m_borderSize.right); + height += (m_borderSize.top + m_borderSize.bottom); + } + + rect.setX(m_rect.getX()); + rect.setY(m_rect.getY()); + rect.setWidth(width); + rect.setHeight(height); +} + +/** + * Draw the area of this widget that falls within the clipping region. + * Called by the redraw() function to draw all visible regions. + * + * @param port The CGraphicsPort to draw to. + * @see redraw() + */ + +void CImage::drawContents(CGraphicsPort *port) +{ + // Get the the drawable region + + CRect rect; + getRect(rect); + + // Allocate a working buffer that will hold one row of the bitmap + + FAR nxwidget_pixel_t *buffer = new nxwidget_pixel_t[rect.getWidth()]; + + // Set up a simple bitmap structure to describe on row + + struct SBitmap bitmap; + bitmap.bpp = m_bitmap->getBitsPerPixel(); + bitmap.fmt = m_bitmap->getColorFormat(); + bitmap.width = rect.getWidth(); + bitmap.height = 1; + bitmap.stride = (rect.getWidth() * m_bitmap->getBitsPerPixel()) >> 3; + bitmap.data = buffer; + + // This is the number of rows that we can draw at the top of the display + + nxgl_coord_t nTopRows = m_bitmap->getHeight() - m_origin.y; + if (nTopRows > rect.getHeight()) + { + nTopRows = rect.getHeight(); + } + else if (nTopRows < 0) + { + nTopRows = 0; + } + + // This the starting row in the bitmap image where we will begin drawing. + + nxgl_coord_t imageRow = m_origin.y; + + // This the starting row in the display image where we will begin drawing. + + nxgl_coord_t displayRow = rect.getY(); + + // Are we going to draw any rows at the top of the display? + + if (nTopRows > 0) + { + // This is the number of columns that we can draw on the left side of + // the display + + nxgl_coord_t nLeftPixels = m_bitmap->getWidth() - m_origin.x; + + // This is the number of rows that we have to pad on the right if the display + // width is wider than the image width + + nxgl_coord_t nRightPad; + if (nLeftPixels >= rect.getWidth()) + { + nRightPad = 0; + } + else + { + nRightPad = rect.getWidth() - nLeftPixels; + } + + // Apply the padding to the right hand side + + FAR nxwidget_pixel_t *ptr = &buffer[nLeftPixels]; + nxwidget_pixel_t backColor = getBackgroundColor(); + + for (int column = nLeftPixels; column < rect.getWidth(); column++) + { + *ptr++ = backColor; + } + + // The is the row number of the first row that we cannot draw into + + nxgl_coord_t lastTopRow = nTopRows + m_origin.y; + + // Now draw the rows from the offset position + + for (; imageRow < lastTopRow; imageRow++, displayRow++) + { + // Get the graphics data for the right hand side of this row + + if (!m_bitmap->getRun(m_origin.x, imageRow, nLeftPixels, buffer)) + { + gvdbg("IBitmap::getRun failed at image row\n", imageRow); + delete buffer; + return; + } + + // Replace any transparent pixels with the background color. + // Then we can use the faster opaque drawBitmap() function. + + ptr = buffer; + for (int i = 0; i < nLeftPixels; i++, ptr++) + { + if (*ptr == CONFIG_NXWIDGETS_TRANSPARENT_COLOR) + { + *ptr = backColor; + } + } + + // And put these on the display + + port->drawBitmap(rect.getX(), displayRow, rect.getWidth(), 1, + &bitmap, 0, 0); + } + } + + // Are we going to draw any rows at the top of the display? + + if (nTopRows < rect.getHeight()) + { + // Pad the entire row + + FAR nxwidget_pixel_t *ptr = buffer; + nxwidget_pixel_t backColor = getBackgroundColor(); + + for (int column = 0; column < rect.getWidth(); column++) + { + *ptr++ = backColor; + } + + // Now draw the rows from the offset position + + for (; displayRow < rect.getHeight(); displayRow++) + { + // Put the padded row on the display + + port->drawBitmap(rect.getX(), displayRow, rect.getWidth(), 1, + &bitmap, 0, 0); + } + } + + delete buffer; +} + +/** + * Draw the area of this widget that falls within the clipping region. + * Called by the redraw() function to draw all visible regions. + * + * @param port The CGraphicsPort to draw to. + * @see redraw() + */ + +void CImage::drawBorder(CGraphicsPort *port) +{ + if (!isBorderless()) + { + port->drawBevelledRect(getX(), getY(), getWidth(), getHeight(), + getShadowEdgeColor(), getShineEdgeColor()); + } +} + +/** + * Set the horizontal position of the bitmap. Zero is the left edge + * of the bitmap and values >0 will move the bit map to the right. + * This method is useful for horizontal scrolling a large bitmap + * within a smaller window + */ + +void CImage::setImageLeft(nxgl_coord_t column) +{ + if (column > 0 && column <= m_bitmap->getWidth()) + { + m_origin.x = column; + } +} + +/** + * Set the vertical position of the bitmap. Zero is the top edge + * of the bitmap and values >0 will move the bit map down. + * This method is useful for vertical scrolling a large bitmap + * within a smaller window + */ + +void CImage::setImageTop(nxgl_coord_t row) +{ + if (row > 0 && row <= m_bitmap->getHeight()) + { + m_origin.x = row; + } +} + |