mehmet gok / MemoryLCD

Fork of Silabs MemoryLCD library

Dependents:   demoUI whrmDemoUI Host_Software_MAX32664GWEB_HR_EXTENDED Host_Software_MAX32664GWEC_SpO2_HR-_EXTE ... more

C++ library for Sharp Microelectronics 1.28 inch LCD TFT, LS013B7DH03, SPI bus. Forked from Silicon Labs MemoryLCD display driver.

BufferedDisplay.cpp@6:fe04073fe90c, 2015-07-29 (annotated)

Committer:
stevew817
Date:
Wed Jul 29 09:03:13 2015 +0000
Revision:
6:fe04073fe90c
Parent:
0:a0faa86660d4
Child:
7:6cf0aa7bc0fc
Update to showBMP() function and buffer type to support display widths that are not a multiple of 32.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Steven Cooreman 0:a0faa86660d4 1 /***************************************************************************//**
Steven Cooreman 0:a0faa86660d4 2 * @file BufferedDisplay.cpp
Steven Cooreman 0:a0faa86660d4 3 * @brief Buffered version of GraphicsDisplay
Steven Cooreman 0:a0faa86660d4 4 *******************************************************************************
Steven Cooreman 0:a0faa86660d4 5 * @section License
Steven Cooreman 0:a0faa86660d4 6 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
Steven Cooreman 0:a0faa86660d4 7 *******************************************************************************
Steven Cooreman 0:a0faa86660d4 8 *
Steven Cooreman 0:a0faa86660d4 9 * Permission is granted to anyone to use this software for any purpose,
Steven Cooreman 0:a0faa86660d4 10 * including commercial applications, and to alter it and redistribute it
Steven Cooreman 0:a0faa86660d4 11 * freely, subject to the following restrictions:
Steven Cooreman 0:a0faa86660d4 12 *
Steven Cooreman 0:a0faa86660d4 13 * 1. The origin of this software must not be misrepresented; you must not
Steven Cooreman 0:a0faa86660d4 14 * claim that you wrote the original software.
Steven Cooreman 0:a0faa86660d4 15 * 2. Altered source versions must be plainly marked as such, and must not be
Steven Cooreman 0:a0faa86660d4 16 * misrepresented as being the original software.
Steven Cooreman 0:a0faa86660d4 17 * 3. This notice may not be removed or altered from any source distribution.
Steven Cooreman 0:a0faa86660d4 18 *
Steven Cooreman 0:a0faa86660d4 19 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
Steven Cooreman 0:a0faa86660d4 20 * obligation to support this Software. Silicon Labs is providing the
Steven Cooreman 0:a0faa86660d4 21 * Software "AS IS", with no express or implied warranties of any kind,
Steven Cooreman 0:a0faa86660d4 22 * including, but not limited to, any implied warranties of merchantability
Steven Cooreman 0:a0faa86660d4 23 * or fitness for any particular purpose or warranties against infringement
Steven Cooreman 0:a0faa86660d4 24 * of any proprietary rights of a third party.
Steven Cooreman 0:a0faa86660d4 25 *
Steven Cooreman 0:a0faa86660d4 26 * Silicon Labs will not be liable for any consequential, incidental, or
Steven Cooreman 0:a0faa86660d4 27 * special damages, or any other relief, or for any claim by any third party,
Steven Cooreman 0:a0faa86660d4 28 * arising from your use of this Software.
Steven Cooreman 0:a0faa86660d4 29 *
Steven Cooreman 0:a0faa86660d4 30 ******************************************************************************/
Steven Cooreman 0:a0faa86660d4 31
Steven Cooreman 0:a0faa86660d4 32 #include "BufferedDisplay.h"
Steven Cooreman 0:a0faa86660d4 33
Steven Cooreman 0:a0faa86660d4 34 #define SWAP8(a) ((((a) & 0x80) >> 7) | (((a) & 0x40) >> 5) | (((a) & 0x20) >> 3) | (((a) & 0x10) >> 1) | (((a) & 0x08) << 1) | (((a) & 0x04) << 3) | (((a) & 0x02) << 5) | (((a) & 0x01) << 7))
Steven Cooreman 0:a0faa86660d4 35
Steven Cooreman 0:a0faa86660d4 36 namespace silabs {
Steven Cooreman 0:a0faa86660d4 37
Steven Cooreman 0:a0faa86660d4 38 BufferedDisplay::BufferedDisplay(const char *name) : GraphicsDisplay(name) {
Steven Cooreman 0:a0faa86660d4 39 memset((uint8_t*)_pixelBuffer, White, sizeof(_pixelBuffer)); // init full frame buffer
Steven Cooreman 0:a0faa86660d4 40 memset((uint8_t*)_dirtyRows, 0xFF, sizeof(_dirtyRows)); // init dirty status
Steven Cooreman 0:a0faa86660d4 41 }
Steven Cooreman 0:a0faa86660d4 42
Steven Cooreman 0:a0faa86660d4 43 /**
Steven Cooreman 0:a0faa86660d4 44 * Override of GraphicsDisplay's pixel()
Steven Cooreman 0:a0faa86660d4 45 */
Steven Cooreman 0:a0faa86660d4 46
Steven Cooreman 0:a0faa86660d4 47 void BufferedDisplay::pixel(int x, int y, int colour) {
Steven Cooreman 0:a0faa86660d4 48 uint8_t swapx = 7 - ((unsigned int)x & 0x07);
Steven Cooreman 0:a0faa86660d4 49 x = ((unsigned int)x & 0xFFFFFFF8) | swapx;
Steven Cooreman 0:a0faa86660d4 50
Steven Cooreman 0:a0faa86660d4 51 // determine change
Steven Cooreman 0:a0faa86660d4 52 bool change = ((_pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] & (1 << (x % DISPLAY_BUFFER_TYPE_SIZE))) != ((colour & 0x01) << (x % DISPLAY_BUFFER_TYPE_SIZE)));
Steven Cooreman 0:a0faa86660d4 53 if(change) {
Steven Cooreman 0:a0faa86660d4 54 // xor operation
Steven Cooreman 0:a0faa86660d4 55 _pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] ^= (1 << (x % DISPLAY_BUFFER_TYPE_SIZE));
Steven Cooreman 0:a0faa86660d4 56
Steven Cooreman 0:a0faa86660d4 57 // notify dirty status of this line
Steven Cooreman 0:a0faa86660d4 58 _dirtyRows[y / DISPLAY_BUFFER_TYPE_SIZE] |= (1 << (y % DISPLAY_BUFFER_TYPE_SIZE));
Steven Cooreman 0:a0faa86660d4 59 }
Steven Cooreman 0:a0faa86660d4 60 }
Steven Cooreman 0:a0faa86660d4 61
Steven Cooreman 0:a0faa86660d4 62 int BufferedDisplay::width() {
Steven Cooreman 0:a0faa86660d4 63 return DISPLAY_WIDTH;
Steven Cooreman 0:a0faa86660d4 64 }
Steven Cooreman 0:a0faa86660d4 65 int BufferedDisplay::height() {
Steven Cooreman 0:a0faa86660d4 66 return DISPLAY_HEIGHT;
Steven Cooreman 0:a0faa86660d4 67 }
Steven Cooreman 0:a0faa86660d4 68
Steven Cooreman 0:a0faa86660d4 69 /**
Steven Cooreman 0:a0faa86660d4 70 * Function to move bitmap into frame buffer
Steven Cooreman 0:a0faa86660d4 71 * arguments:
Steven Cooreman 0:a0faa86660d4 72 * * bitmap: pointer to uint8 array containing horizontal pixel data
stevew817 6:fe04073fe90c 73 * * bmpWidth: width of the bitmap in pixels (must be multiple of 8)
stevew817 6:fe04073fe90c 74 * * bmpHeight: height of the bitmap in pixels
stevew817 6:fe04073fe90c 75 * * startX: starting position to apply bitmap in horizontal direction (0 = leftmost) (must be multiple of 8)
stevew817 6:fe04073fe90c 76 * * startY: starting position to apply bitmap in vertical direction (0 = topmost)
Steven Cooreman 0:a0faa86660d4 77 */
Steven Cooreman 0:a0faa86660d4 78 void BufferedDisplay::showBMP(const uint8_t* bitmap, const uint32_t bmpWidth, const uint32_t bmpHeight, const uint32_t startX, const uint32_t startY) {
stevew817 6:fe04073fe90c 79 uint32_t bitmapLine = 0, y = startY, bytesPerLine = ((bmpWidth >= (DISPLAY_WIDTH - startX)) ? (DISPLAY_WIDTH - startX) : bmpWidth) / 8;
Steven Cooreman 0:a0faa86660d4 80
Steven Cooreman 0:a0faa86660d4 81 /* Apply constraints */
Steven Cooreman 0:a0faa86660d4 82 if((bmpWidth & 0x07) != 0) return;
Steven Cooreman 0:a0faa86660d4 83 if((startX & 0x07) != 0) return;
stevew817 6:fe04073fe90c 84 if(startX >= DISPLAY_WIDTH) return;
stevew817 6:fe04073fe90c 85
stevew817 6:fe04073fe90c 86 //Superflouous due to for-loop check
stevew817 6:fe04073fe90c 87 //if((startY >= DISPLAY_HEIGHT) return;
Steven Cooreman 0:a0faa86660d4 88
Steven Cooreman 0:a0faa86660d4 89 /* Copy over bytes to the framebuffer */
stevew817 6:fe04073fe90c 90 for(; y < DISPLAY_HEIGHT; y++) {
stevew817 6:fe04073fe90c 91 memcpy( (void*) &(((uint8_t*)_pixelBuffer)[((y * DISPLAY_WIDTH) + startX) / 8]),
stevew817 6:fe04073fe90c 92 (const void*) &(bitmap[bitmapLine * (bmpWidth / 8)]),
stevew817 6:fe04073fe90c 93 bytesPerLine);
Steven Cooreman 0:a0faa86660d4 94
stevew817 6:fe04073fe90c 95 _dirtyRows[y / DISPLAY_BUFFER_TYPE_SIZE] |= (1 << (y % DISPLAY_BUFFER_TYPE_SIZE));
stevew817 6:fe04073fe90c 96 bitmapLine++;
Steven Cooreman 0:a0faa86660d4 97 }
Steven Cooreman 0:a0faa86660d4 98
Steven Cooreman 0:a0faa86660d4 99 return;
Steven Cooreman 0:a0faa86660d4 100 }
Steven Cooreman 0:a0faa86660d4 101 }