diff options
Diffstat (limited to 'drivers/lcd/draw.c')
| -rw-r--r-- | drivers/lcd/draw.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/drivers/lcd/draw.c b/drivers/lcd/draw.c new file mode 100644 index 0000000..e7d5909 --- /dev/null +++ b/drivers/lcd/draw.c @@ -0,0 +1,237 @@ +/* ----------------------------------------------------------------------------
+ * ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * 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 disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+
+#include "draw.h"
+#include "font.h"
+#include <board.h>
+#include <utility/assert.h>
+
+#include <string.h>
+
+//------------------------------------------------------------------------------
+// Global functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Fills the given LCD buffer with a particular color.
+/// Only works in 24-bits packed mode for now.
+/// \param pBuffer LCD buffer to fill.
+/// \param color Fill color.
+//------------------------------------------------------------------------------
+void LCDD_Fill(void *pBuffer, unsigned int color)
+{
+ unsigned int i;
+ unsigned char tmpBuffer[12];
+
+ // Prepare temporary buffer
+ for (i=0; i < 4; i++) {
+
+ memcpy(&(tmpBuffer[i*3]), &color, 3);
+ }
+
+ // Copy in LCD buffer
+ i = 0;
+ while (i < (BOARD_LCD_FRAMESIZE * 4)) {
+
+ memcpy(&(((unsigned char *) pBuffer)[i]), tmpBuffer, 12);
+ i += 12;
+ }
+}
+
+//------------------------------------------------------------------------------
+/// Sets the specified pixel to the given color.
+/// !!! Only works in 24-bits packed mode for now. !!!
+/// \param pBuffer LCD buffer to draw on.
+/// \param x X-coordinate of pixel.
+/// \param y Y-coordinate of pixel.
+/// \param color Pixel color.
+//------------------------------------------------------------------------------
+void LCDD_DrawPixel(
+ void *pBuffer,
+ unsigned int x,
+ unsigned int y,
+ unsigned int color)
+{
+ unsigned char *pTmp = &(((unsigned char *) pBuffer)[y*3*BOARD_LCD_WIDTH + x*3]);
+
+ // Modify color when using RGB565
+#ifdef BOARD_LCD_RGB565
+ unsigned char r;
+ unsigned char g;
+ unsigned char b;
+
+ r = (color >> 16) & 0xFF;
+ g = (color >> 8) & 0xFF;
+ b = color & 0xFF;
+ r = ((r & 0x78) << 1) | ((r & 0x80) >> 5) | ((g & 0x80) >> 4);
+ g = ((g & 0x7C) << 1);
+ b = (b & 0xFC);
+ color = (b << 16) | (g << 8) | r;
+#elif defined (BOARD_LCD_BGR565)
+ unsigned char r;
+ unsigned char g;
+ unsigned char b;
+
+ r = (color >> 16) & 0xFF;
+ g = (color >> 8) & 0xFF;
+ b = color & 0xFF;
+ color = (b << 16) | (g << 8) | r;
+#endif
+
+ pTmp[0] = (color >> 16) & 0xFF;
+ pTmp[1] = (color >> 8) & 0xFF;
+ pTmp[2] = (color >> 0) & 0xFF;
+}
+
+//------------------------------------------------------------------------------
+/// Read pixel of given coordinate.
+/// !!! Only works in 24-bits packed mode for now. !!!
+/// \param pBuffer LCD buffer to draw on.
+/// \param x X-coordinate of pixel.
+/// \param y Y-coordinate of pixel.
+/// \return Pixel color.
+//------------------------------------------------------------------------------
+unsigned int LCDD_ReadPixel(
+ void *pBuffer,
+ unsigned int x,
+ unsigned int y)
+{
+ unsigned char *pTmp = &(((unsigned char *) pBuffer)[y*3*BOARD_LCD_WIDTH + x*3]);
+ unsigned int color;
+
+#ifdef BOARD_LCD_RGB565
+ color = 0; // TBD
+#elif defined (BOARD_LCD_BGR565)
+ color = ((pTmp[2] << 16) | (pTmp[1] << 8) | pTmp[0]);
+#else
+ color = ((pTmp[0] << 16) | (pTmp[1] << 8) | pTmp[2]);
+#endif
+
+ return color;
+}
+
+//------------------------------------------------------------------------------
+/// Draws a rectangle inside a LCD buffer, at the given coordinates.
+/// \param pBuffer LCD buffer to draw on.
+/// \param x X-coordinate of upper-left rectangle corner.
+/// \param y Y-coordinate of upper-left rectangle corner.
+/// \param width Rectangle width in pixels.
+/// \param height Rectangle height in pixels.
+/// \param color Rectangle color.
+//------------------------------------------------------------------------------
+void LCDD_DrawRectangle(
+ void *pBuffer,
+ unsigned int x,
+ unsigned int y,
+ unsigned int width,
+ unsigned int height,
+ unsigned int color)
+{
+ unsigned int rx, ry;
+
+ for (ry=0; ry < height; ry++) {
+
+ for (rx=0; rx < width; rx++) {
+
+ LCDD_DrawPixel(pBuffer, x+rx, y+ry, color);
+ }
+ }
+}
+
+//------------------------------------------------------------------------------
+/// Draws a string inside a LCD buffer, at the given coordinates. Line breaks
+/// will be honored.
+/// \param pBuffer Buffer to draw on.
+/// \param x X-coordinate of string top-left corner.
+/// \param y Y-coordinate of string top-left corner.
+/// \param pString String to display.
+/// \param color String color.
+//------------------------------------------------------------------------------
+void LCDD_DrawString(
+ void *pBuffer,
+ unsigned int x,
+ unsigned int y,
+ const char *pString,
+ unsigned int color)
+{
+ unsigned xorg = x;
+
+ while (*pString != 0) {
+ if (*pString == '\n') {
+
+ y += gFont.height + 2;
+ x = xorg;
+ }
+ else {
+
+ LCDD_DrawChar(pBuffer, x, y, *pString, color);
+ x += gFont.width + 2;
+ }
+ pString++;
+ }
+}
+
+//------------------------------------------------------------------------------
+/// Returns the width & height in pixels that a string will occupy on the screen
+/// if drawn using LCDD_DrawString.
+/// \param pString String.
+/// \param pWidth Pointer for storing the string width (optional).
+/// \param pHeight Pointer for storing the string height (optional).
+/// \return String width in pixels.
+//------------------------------------------------------------------------------
+void LCDD_GetStringSize(
+ const char *pString,
+ unsigned int *pWidth,
+ unsigned int *pHeight)
+{
+ unsigned int width = 0;
+ unsigned int height = gFont.height;
+
+ while (*pString != 0) {
+
+ if (*pString == '\n') {
+
+ height += gFont.height + 2;
+ }
+ else {
+
+ width += gFont.width + 2;
+ }
+ pString++;
+ }
+
+ if (width > 0) width -= 2;
+
+ if (pWidth) *pWidth = width;
+ if (pHeight) *pHeight = height;
+}
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