Guillermo Stedile / RA8875

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GraphicsDisplay.h@32:0e4f2ae512e2, 2014-01-21 (annotated)

Committer:
WiredHome
Date:
Tue Jan 21 03:28:36 2014 +0000
Revision:
32:0e4f2ae512e2
Parent:
31:c72e12cd5c67
Child:
33:b6b710758ab3
Tuned up the Bitmap support - includes 24-bit color, and some hardware performance improvements.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:de9d1462a835 1 /* mbed GraphicsDisplay Display Library Base Class
dreschpe 0:de9d1462a835 2 * Copyright (c) 2007-2009 sford
dreschpe 0:de9d1462a835 3 * Released under the MIT License: http://mbed.org/license/mit
dreschpe 0:de9d1462a835 4 *
dreschpe 0:de9d1462a835 5 * A library for providing a common base class for Graphics displays
dreschpe 0:de9d1462a835 6 * To port a new display, derive from this class and implement
dreschpe 0:de9d1462a835 7 * the constructor (setup the display), pixel (put a pixel
dreschpe 0:de9d1462a835 8 * at a location), width and height functions. Everything else
dreschpe 0:de9d1462a835 9 * (locate, printf, putc, cls, window, putp, fill, blit, blitbit)
dreschpe 0:de9d1462a835 10 * will come for free. You can also provide a specialised implementation
dreschpe 0:de9d1462a835 11 * of window and putp to speed up the results
dreschpe 0:de9d1462a835 12 */
dreschpe 0:de9d1462a835 13
dreschpe 0:de9d1462a835 14 #ifndef MBED_GRAPHICSDISPLAY_H
dreschpe 0:de9d1462a835 15 #define MBED_GRAPHICSDISPLAY_H
WiredHome 32:0e4f2ae512e2 16 #include "Bitmap.h"
dreschpe 0:de9d1462a835 17 #include "TextDisplay.h"
dreschpe 0:de9d1462a835 18
WiredHome 32:0e4f2ae512e2 19 /// The GraphicsDisplay class
WiredHome 32:0e4f2ae512e2 20 ///
WiredHome 32:0e4f2ae512e2 21 /// This graphics display class supports both graphics and text operations.
WiredHome 32:0e4f2ae512e2 22 /// Typically, a subclass is derived from this which has localizations to
WiredHome 32:0e4f2ae512e2 23 /// adapt to a specific hardware platform (e.g. a display controller chip),
WiredHome 32:0e4f2ae512e2 24 /// that overrides methods in here to either add more capability or perhaps
WiredHome 32:0e4f2ae512e2 25 /// to improve performance, by leveraging specific hardware capabilities.
WiredHome 32:0e4f2ae512e2 26 ///
WiredHome 32:0e4f2ae512e2 27 class GraphicsDisplay : public TextDisplay
WiredHome 32:0e4f2ae512e2 28 {
WiredHome 32:0e4f2ae512e2 29 public:
WiredHome 32:0e4f2ae512e2 30 /// The constructor
dreschpe 0:de9d1462a835 31 GraphicsDisplay(const char* name);
WiredHome 32:0e4f2ae512e2 32
WiredHome 32:0e4f2ae512e2 33 /// Draw a pixel in the specified color.
WiredHome 32:0e4f2ae512e2 34 ///
WiredHome 32:0e4f2ae512e2 35 /// @note this method must be supported in the derived class.
WiredHome 32:0e4f2ae512e2 36 ///
WiredHome 32:0e4f2ae512e2 37 /// @param x is the horizontal offset to this pixel.
WiredHome 32:0e4f2ae512e2 38 /// @param y is the vertical offset to this pixel.
WiredHome 32:0e4f2ae512e2 39 /// @param color defines the color for the pixel.
WiredHome 32:0e4f2ae512e2 40 /// @returns success/failure code. @see RetCode_t.
WiredHome 32:0e4f2ae512e2 41 ///
WiredHome 19:3f82c1161fd2 42 virtual RetCode_t pixel(unsigned int x, unsigned int y, color_t colour) = 0;
WiredHome 32:0e4f2ae512e2 43
WiredHome 32:0e4f2ae512e2 44 /// get the screen width in pixels
WiredHome 32:0e4f2ae512e2 45 ///
WiredHome 32:0e4f2ae512e2 46 /// @note this method must be supported in the derived class.
WiredHome 32:0e4f2ae512e2 47 ///
WiredHome 32:0e4f2ae512e2 48 /// @returns screen width in pixels.
WiredHome 32:0e4f2ae512e2 49 ///
WiredHome 32:0e4f2ae512e2 50 virtual uint16_t width() = 0;
WiredHome 32:0e4f2ae512e2 51
WiredHome 32:0e4f2ae512e2 52 /// get the screen height in pixels
WiredHome 32:0e4f2ae512e2 53 ///
WiredHome 32:0e4f2ae512e2 54 /// @note this method must be supported in the derived class.
WiredHome 32:0e4f2ae512e2 55 ///
WiredHome 32:0e4f2ae512e2 56 /// @returns screen height in pixels.
WiredHome 32:0e4f2ae512e2 57 ///
WiredHome 32:0e4f2ae512e2 58 virtual uint16_t height() = 0;
WiredHome 32:0e4f2ae512e2 59
WiredHome 32:0e4f2ae512e2 60 /// Prepare the controller to write binary data to the screen by positioning
WiredHome 32:0e4f2ae512e2 61 /// the memory cursor.
WiredHome 32:0e4f2ae512e2 62 ///
WiredHome 32:0e4f2ae512e2 63 /// @note this method must be supported in the derived class.
WiredHome 32:0e4f2ae512e2 64 ///
WiredHome 32:0e4f2ae512e2 65 /// @param x is the horizontal position in pixels (from the left edge)
WiredHome 32:0e4f2ae512e2 66 /// @param y is the vertical position in pixels (from the top edge)
WiredHome 32:0e4f2ae512e2 67 /// @returns success/failure code. @see RetCode_t.
WiredHome 32:0e4f2ae512e2 68 ///
WiredHome 32:0e4f2ae512e2 69 virtual RetCode_t SetGraphicsCursor(uint16_t x, uint16_t y) = 0;
WiredHome 32:0e4f2ae512e2 70
WiredHome 32:0e4f2ae512e2 71 /// Draw a filled rectangle in the specified color
WiredHome 32:0e4f2ae512e2 72 ///
WiredHome 32:0e4f2ae512e2 73 /// @note As a side effect, this changes the current
WiredHome 32:0e4f2ae512e2 74 /// foreground color for subsequent operations.
WiredHome 32:0e4f2ae512e2 75 ///
WiredHome 32:0e4f2ae512e2 76 /// @note this method must be supported in the derived class.
WiredHome 32:0e4f2ae512e2 77 ///
WiredHome 32:0e4f2ae512e2 78 /// @param x1 is the horizontal start of the line.
WiredHome 32:0e4f2ae512e2 79 /// @param y1 is the vertical start of the line.
WiredHome 32:0e4f2ae512e2 80 /// @param x2 is the horizontal end of the line.
WiredHome 32:0e4f2ae512e2 81 /// @param y2 is the vertical end of the line.
WiredHome 32:0e4f2ae512e2 82 /// @param color defines the foreground color.
WiredHome 32:0e4f2ae512e2 83 /// @param fillit is optional to NOFILL the rectangle. default is FILL.
WiredHome 32:0e4f2ae512e2 84 /// @returns success/failure code. @see RetCode_t.
WiredHome 32:0e4f2ae512e2 85 ///
WiredHome 32:0e4f2ae512e2 86 virtual RetCode_t fillrect(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2,
WiredHome 32:0e4f2ae512e2 87 color_t color, fill_t fillit = FILL) = 0;
WiredHome 32:0e4f2ae512e2 88
WiredHome 32:0e4f2ae512e2 89
WiredHome 32:0e4f2ae512e2 90 virtual RetCode_t WriteCommand(unsigned char command, unsigned int data = 0xFFFF) = 0;
WiredHome 32:0e4f2ae512e2 91 virtual RetCode_t WriteData(unsigned char data) = 0;
WiredHome 32:0e4f2ae512e2 92
WiredHome 32:0e4f2ae512e2 93 /// Set the window, which controls where items are written to the screen.
WiredHome 32:0e4f2ae512e2 94 ///
WiredHome 32:0e4f2ae512e2 95 /// When something hits the window width, it wraps back to the left side
WiredHome 32:0e4f2ae512e2 96 /// and down a row. If the initial write is outside the window, it will
WiredHome 32:0e4f2ae512e2 97 /// be captured into the window when it crosses a boundary.
WiredHome 32:0e4f2ae512e2 98 ///
WiredHome 32:0e4f2ae512e2 99 /// @param x is the left edge in pixels.
WiredHome 32:0e4f2ae512e2 100 /// @param y is the top edge in pixels.
WiredHome 32:0e4f2ae512e2 101 /// @param width is the window width in pixels.
WiredHome 32:0e4f2ae512e2 102 /// @param height is the window height in pixels.
WiredHome 32:0e4f2ae512e2 103 /// @returns success/failure code. @see RetCode_t.
WiredHome 32:0e4f2ae512e2 104 ///
WiredHome 32:0e4f2ae512e2 105 virtual RetCode_t window(unsigned int x,unsigned int y,unsigned int w,unsigned int h);
WiredHome 32:0e4f2ae512e2 106
WiredHome 32:0e4f2ae512e2 107 /// Clear the screen.
WiredHome 32:0e4f2ae512e2 108 ///
WiredHome 32:0e4f2ae512e2 109 /// The behavior is to clear the whole screen.
WiredHome 32:0e4f2ae512e2 110 ///
WiredHome 32:0e4f2ae512e2 111 /// @returns success/failure code. @see RetCode_t.
WiredHome 32:0e4f2ae512e2 112 ///
WiredHome 32:0e4f2ae512e2 113 virtual RetCode_t cls();
WiredHome 32:0e4f2ae512e2 114
WiredHome 32:0e4f2ae512e2 115
WiredHome 31:c72e12cd5c67 116 virtual void WindowMax(void);
dreschpe 0:de9d1462a835 117
WiredHome 32:0e4f2ae512e2 118 /// method to put a single color pixel to the screen.
WiredHome 32:0e4f2ae512e2 119 ///
WiredHome 32:0e4f2ae512e2 120 /// This method may be called as many times as necessary after
WiredHome 32:0e4f2ae512e2 121 /// @see _StartGraphicsStream() is called, and it should be followed
WiredHome 32:0e4f2ae512e2 122 /// by _EndGraphicsStream.
WiredHome 32:0e4f2ae512e2 123 ///
WiredHome 32:0e4f2ae512e2 124 /// @param pixel is a color value to be put on the screen.
WiredHome 32:0e4f2ae512e2 125 /// @returns error code.
WiredHome 32:0e4f2ae512e2 126 ///
WiredHome 32:0e4f2ae512e2 127 virtual RetCode_t putp(color_t pixel);
WiredHome 32:0e4f2ae512e2 128
WiredHome 32:0e4f2ae512e2 129
WiredHome 31:c72e12cd5c67 130 virtual void fill(int x, int y, int w, int h, color_t colour);
WiredHome 29:422616aa04bd 131 virtual void blit(int x, int y, int w, int h, const int * colour);
WiredHome 29:422616aa04bd 132
WiredHome 29:422616aa04bd 133 virtual int blitbit(int x, int y, int w, int h, const char * colour);
dreschpe 0:de9d1462a835 134
WiredHome 29:422616aa04bd 135 /// This method transfers one character from the external font data
WiredHome 29:422616aa04bd 136 /// to the screen.
WiredHome 29:422616aa04bd 137 ///
WiredHome 29:422616aa04bd 138 /// @note the font data is in a special format as generate by
WiredHome 29:422616aa04bd 139 /// the mikroe font creator. \\
WiredHome 29:422616aa04bd 140 /// See http://www.mikroe.com/glcd-font-creator/
WiredHome 29:422616aa04bd 141 ///
WiredHome 29:422616aa04bd 142 /// @param x is the horizontal pixel coordinate
WiredHome 29:422616aa04bd 143 /// @param y is the vertical pixel coordinate
WiredHome 29:422616aa04bd 144 /// @param fontTable is the base of the table which has the metrics
WiredHome 29:422616aa04bd 145 /// @param fontChar is the start of that record in the table for the char (e.g. 'A' - 'Z')
WiredHome 29:422616aa04bd 146 /// @returns how far the cursor should advance to the right in pixels
WiredHome 29:422616aa04bd 147 ///
WiredHome 29:422616aa04bd 148 virtual int fontblit(int x, int y, const unsigned char * fontTable, const unsigned char * fontChar);
WiredHome 29:422616aa04bd 149
WiredHome 32:0e4f2ae512e2 150 /// This method returns the color value from a palette.
WiredHome 32:0e4f2ae512e2 151 ///
WiredHome 32:0e4f2ae512e2 152 /// This method accepts a pointer to a Bitmap color palette, which
WiredHome 32:0e4f2ae512e2 153 /// is a table in memory composed of RGB Quad values (r, g, b, 0),
WiredHome 32:0e4f2ae512e2 154 /// and an index into that table. It then extracts the color information
WiredHome 32:0e4f2ae512e2 155 /// and downsamples it to a color_t value which it returns.
WiredHome 32:0e4f2ae512e2 156 ///
WiredHome 32:0e4f2ae512e2 157 /// @note This method probably has very little value outside of
WiredHome 32:0e4f2ae512e2 158 /// the internal methods for reading BMP files.
WiredHome 32:0e4f2ae512e2 159 ///
WiredHome 32:0e4f2ae512e2 160 /// @param colorPalette is the handle to the color palette to use.
WiredHome 32:0e4f2ae512e2 161 /// @param i is the index into the color palette.
WiredHome 32:0e4f2ae512e2 162 /// @returns the color in color_t format.
WiredHome 32:0e4f2ae512e2 163 ///
WiredHome 32:0e4f2ae512e2 164 color_t RGBQuadToRGB16(RGBQUAD * colorPalette, uint16_t i);
WiredHome 32:0e4f2ae512e2 165
WiredHome 31:c72e12cd5c67 166 /// This method reads a disk file that is in bitmap format and
WiredHome 31:c72e12cd5c67 167 /// puts it on the screen.
WiredHome 31:c72e12cd5c67 168 ///
WiredHome 31:c72e12cd5c67 169 /// @note This only reads 16-bit bitmap format.
WiredHome 31:c72e12cd5c67 170 /// @note This is a slow operation, partially due to the use of
WiredHome 31:c72e12cd5c67 171 /// the local file system, and partially because bmp files
WiredHome 31:c72e12cd5c67 172 /// are stored from the bottom up, and the memory is written
WiredHome 32:0e4f2ae512e2 173 /// from the top down; as a result, it constantly 'seeks'
WiredHome 32:0e4f2ae512e2 174 /// on the file system for the next row of information.
WiredHome 31:c72e12cd5c67 175 ///
WiredHome 31:c72e12cd5c67 176 /// @param x is the horizontal pixel coordinate
WiredHome 31:c72e12cd5c67 177 /// @param y is the vertical pixel coordinate
WiredHome 31:c72e12cd5c67 178 /// @param Name_BMP is the filename on the local file system.
WiredHome 31:c72e12cd5c67 179 /// @returns success or error code.
WiredHome 31:c72e12cd5c67 180 ///
WiredHome 32:0e4f2ae512e2 181 RetCode_t RenderBitmapFile(unsigned int x, unsigned int y, const char *Name_BMP);
WiredHome 31:c72e12cd5c67 182
WiredHome 29:422616aa04bd 183 /// prints one character at the specified coordinates.
WiredHome 29:422616aa04bd 184 ///
WiredHome 29:422616aa04bd 185 /// This will print the character at the specified pixel coordinates.
WiredHome 29:422616aa04bd 186 ///
WiredHome 29:422616aa04bd 187 /// @param x is the horizontal offset in pixels.
WiredHome 29:422616aa04bd 188 /// @param y is the vertical offset in pixels.
WiredHome 29:422616aa04bd 189 /// @param value is the character to print.
WiredHome 29:422616aa04bd 190 /// @returns number of pixels to index to the right if a character was printed, 0 otherwise.
WiredHome 29:422616aa04bd 191 ///
WiredHome 29:422616aa04bd 192 virtual int character(int x, int y, int value);
WiredHome 29:422616aa04bd 193
WiredHome 32:0e4f2ae512e2 194 /// get the number of colums based on the currently active font
WiredHome 32:0e4f2ae512e2 195 ///
WiredHome 32:0e4f2ae512e2 196 /// @returns number of columns.
WiredHome 32:0e4f2ae512e2 197 ///
WiredHome 32:0e4f2ae512e2 198 virtual int columns(void);
WiredHome 32:0e4f2ae512e2 199
WiredHome 32:0e4f2ae512e2 200 /// get the number of rows based on the currently active font
WiredHome 32:0e4f2ae512e2 201 ///
WiredHome 32:0e4f2ae512e2 202 /// @returns number of rows.
WiredHome 32:0e4f2ae512e2 203 ///
WiredHome 32:0e4f2ae512e2 204 virtual int rows(void);
WiredHome 32:0e4f2ae512e2 205
WiredHome 32:0e4f2ae512e2 206 /// Select a bitmap font (provided by the user) for all subsequent text.
WiredHome 32:0e4f2ae512e2 207 ///
WiredHome 32:0e4f2ae512e2 208 /// @note Tool to create the fonts is accessible from its creator
WiredHome 32:0e4f2ae512e2 209 /// available at http://www.mikroe.com.
WiredHome 32:0e4f2ae512e2 210 /// Change the data to an array of type char[].
WiredHome 32:0e4f2ae512e2 211 ///
WiredHome 32:0e4f2ae512e2 212 /// @param font is a pointer to a specially formed font array.
WiredHome 32:0e4f2ae512e2 213 /// This special font array has a 4-byte header, followed by
WiredHome 32:0e4f2ae512e2 214 /// the data:
WiredHome 32:0e4f2ae512e2 215 /// - the number of bytes per char
WiredHome 32:0e4f2ae512e2 216 /// - the vertical size in pixels for each character
WiredHome 32:0e4f2ae512e2 217 /// - the horizontal size in pixels for each character
WiredHome 32:0e4f2ae512e2 218 /// - the number of bytes per vertical line (width of the array)
WiredHome 32:0e4f2ae512e2 219 /// @returns error code.
WiredHome 32:0e4f2ae512e2 220 ///
WiredHome 29:422616aa04bd 221 virtual RetCode_t set_font(const unsigned char * font = NULL);
WiredHome 32:0e4f2ae512e2 222
WiredHome 32:0e4f2ae512e2 223 protected:
WiredHome 32:0e4f2ae512e2 224
WiredHome 32:0e4f2ae512e2 225 /// Pure virtual method indicating the start of a graphics stream.
WiredHome 32:0e4f2ae512e2 226 ///
WiredHome 32:0e4f2ae512e2 227 /// This is called prior to a stream of pixel data being sent.
WiredHome 32:0e4f2ae512e2 228 /// This may cause register configuration changes in the derived
WiredHome 32:0e4f2ae512e2 229 /// class in order to prepare the hardware to accept the streaming
WiredHome 32:0e4f2ae512e2 230 /// data.
WiredHome 32:0e4f2ae512e2 231 ///
WiredHome 32:0e4f2ae512e2 232 /// @note this method must be supported in the derived class.
WiredHome 32:0e4f2ae512e2 233 ///
WiredHome 32:0e4f2ae512e2 234 /// @returns error code.
WiredHome 32:0e4f2ae512e2 235 ///
WiredHome 32:0e4f2ae512e2 236 virtual RetCode_t _StartGraphicsStream(void) = 0;
dreschpe 0:de9d1462a835 237
WiredHome 32:0e4f2ae512e2 238 /// Pure virtual method indicating the end of a graphics stream.
WiredHome 32:0e4f2ae512e2 239 ///
WiredHome 32:0e4f2ae512e2 240 /// This is called to conclude a stream of pixel data that was sent.
WiredHome 32:0e4f2ae512e2 241 /// This may cause register configuration changes in the derived
WiredHome 32:0e4f2ae512e2 242 /// class in order to stop the hardware from accept the streaming
WiredHome 32:0e4f2ae512e2 243 /// data.
WiredHome 32:0e4f2ae512e2 244 ///
WiredHome 32:0e4f2ae512e2 245 /// @note this method must be supported in the derived class.
WiredHome 32:0e4f2ae512e2 246 ///
WiredHome 32:0e4f2ae512e2 247 /// @returns error code.
WiredHome 32:0e4f2ae512e2 248 ///
WiredHome 32:0e4f2ae512e2 249 virtual RetCode_t _EndGraphicsStream(void) = 0;
WiredHome 32:0e4f2ae512e2 250
WiredHome 29:422616aa04bd 251 const unsigned char * font; ///< reference to an external font somewhere in memory
WiredHome 29:422616aa04bd 252
dreschpe 0:de9d1462a835 253 // pixel location
dreschpe 0:de9d1462a835 254 short _x;
dreschpe 0:de9d1462a835 255 short _y;
dreschpe 0:de9d1462a835 256
dreschpe 0:de9d1462a835 257 // window location
dreschpe 0:de9d1462a835 258 short _x1;
dreschpe 0:de9d1462a835 259 short _x2;
dreschpe 0:de9d1462a835 260 short _y1;
dreschpe 0:de9d1462a835 261 short _y2;
dreschpe 0:de9d1462a835 262 };
dreschpe 0:de9d1462a835 263
dreschpe 0:de9d1462a835 264 #endif