/*******************************************************************
*
* _ShowJPG
*
* Shows the contents of a JPEG file
*/
static void _ShowJPG(const char * sFilename) {
int XSize, YSize, XPos, YPos;
GUI_JPEG_INFO Info;
DWORD NumBytesRead;
HANDLE hFile = CreateFile(sFilename, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
DWORD FileSize = GetFileSize(hFile, NULL);
char * pFile = malloc(FileSize);
ReadFile(hFile, pFile, FileSize, &NumBytesRead, NULL);
CloseHandle(hFile);
GUI_ClearRect(0, 60, 319, 239);
GUI_JPEG_GetInfo(pFile, FileSize, &Info);
XSize = Info.XSize;
YSize = Info.YSize;
XPos = (XSize > 320) ? 0 : 160 - (XSize / 2);
YPos = (YSize > 180) ? 60 : 150 - (YSize / 2);
if (!GUI_JPEG_Draw(pFile, FileSize, XPos, YPos)) {
GUI_Delay(2000);
}
free(pFile);
}
/*********************************************************************
*
* _DrawJPEGs
*
* Function description
* Draws the given JPEG image.
*/
static void _DrawJPEGs(const char * sFileName) {
static int i;
const char acError[] = "There is possibly not enough memory to display this JPEG image.\n\nPlease assign more memory to emWin in GUIConf.c.";
GUI_JPEG_INFO Info;
GUI_RECT Rect;
HANDLE hFile;
DWORD NumBytesRead;
DWORD FileSize;
char * pFile;
int xSize, ySize;
int xPos, yPos;
int r;
xSize = LCD_GetXSize();
ySize = LCD_GetYSize();
//
// Display file name.
//
Rect.x0 = BORDER_SIZE;
Rect.y0 = TITLE_HEIGHT;
Rect.x1 = xSize - BORDER_SIZE - 1;
Rect.y1 = YPOS_IMAGE - 1;
GUI_ClearRectEx(&Rect);
GUI_SetTextMode(GUI_TM_NORMAL);
GUI_SetFont(&GUI_Font8x16);
GUI_DispStringInRectWrap(sFileName, &Rect, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_CHAR);
//
// Clear the area in which the JPEG files are displayed.
//
Rect.x0 = BORDER_SIZE;
Rect.y0 = YPOS_IMAGE;
Rect.x1 = xSize - BORDER_SIZE - 1;
Rect.y1 = ySize - BORDER_SIZE - 1;
GUI_ClearRectEx(&Rect);
//
// Load image.
//
hFile = CreateFile(sFileName, GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
FileSize = GetFileSize(hFile, NULL);
pFile = malloc(FileSize);
ReadFile(hFile, pFile, FileSize, &NumBytesRead, NULL);
CloseHandle(hFile);
//
// Check if the current JPEG image fits on the screen.
//
GUI_JPEG_GetInfo(pFile, FileSize, &Info);
xSize -= BORDER_SIZE * 2 + 1;
ySize -= YPOS_IMAGE + BORDER_SIZE + 1;
//
// Display the image centered.
//
xPos = BORDER_SIZE + (xSize - Info.XSize) / 2;
yPos = YPOS_IMAGE + (ySize - Info.YSize) / 2;
GUI_SetClipRect(&Rect);
r = GUI_JPEG_Draw(pFile, FileSize, xPos, yPos);
GUI_SetClipRect(NULL);
if (r) {
//
// The image could not be displayed successfully. Show an error message.
//
GUI_DispStringInRectWrap(acError, &Rect, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_WORD);
} else {
GUI_Delay(2000);
if ((Info.XSize > xSize) || (Info.YSize > ySize)) {
//
// Inform the user about the possibility of scaling JPEG images.
//
if (i == 0) {
GUI_ClearRectEx(&Rect);
GUI_DispStringInRectWrap("JPEG images can be scaled as it is shown in 2DGL_JPEG_DrawScaled.c.", &Rect, GUI_TA_BOTTOM | GUI_TA_HCENTER, GUI_WRAPMODE_WORD);
GUI_Delay(3000);
}
i++;
if (i == NUM_IMAGES_UNTIL_HINT) {
i = 0;
}
}
}
free(pFile);
}
