OK, the zip archive attached to this reply contains the following files:
- MissingWhiteArrow.bmp: Screenshot directly recorded from the image buffer in the internal RAM written to an SD card inserted in to the disco board as BMP file.
- ExpectedWhiteArrow.png: The white arrow should be below the "rainbow" on top of the screen. It should arc around below the rainbow from blue to red.
- white_arrow.png: If I use this file as image asset (it does NOT matter if it's encoded as ARGB888 or L8_ARGB888) the TextureMapper draws the white arrow correctly.
- white_arrow.l8argb: I converted the white_arrow.png to it's l8argb representation myself (with a tool written by myself -- maybe that's erroneous, too?). The first two uint16_t values contain width and height (see code snippet below).
- When I load this file from the SD card as dynamic bitmap and display it using an image widget, the white arrow is displayed correctly.
- But when I use the same BitmapId, that displays the arrow on the same screen at the same time, for the TextureMapper, nothing is displayed by the TextureMapper.
Here are some code snippets:
- This is how I load the l8argb file (using Bitmap::BitmapFormat::L8 as bitmapFormat and Bitmap::ClutFormat::CLUT_FORMAT_L8_ARGB8888 as value for clutFormat):
// I've removed all the error treatment to have it shorter:
BitmapId BitmapLoader::load(const TCHAR* path, Bitmap::BitmapFormat bitmapFormat, Bitmap::ClutFormat clutFormat)
{
BitmapId result = BITMAP_INVALID;
uint8_t bytes[2];
UINT bytesRead;
FRESULT fResult;
uint16_t width, height;
fResult = f_open(&file, path, FA_OPEN_EXISTING | FA_READ);
fResult = f_read(&file, bytes, 2, &bytesRead);
width = bytes[0] + ((uint16_t)(bytes[1]) << 8);
fResult = f_read(&file, bytes, 2, &bytesRead);
height = bytes[0] + ((uint16_t)(bytes[1]) << 8);
result = Bitmap::dynamicBitmapCreate(width, height, bitmapFormat, clutFormat);
fResult = f_read(&file, Bitmap::dynamicBitmapGetAddress(result), f_size(&file) - 4, &bytesRead);
f_close(&file);
return result;
}
- The result of loading the image is stored in bitmapIdwhite_arrow. In the constructur of my screen I load the image and then I pass a Bitmap to the TextureMapper ar00BpmArrow.
ar00BpmArrow.setBitmap(Bitmap(bitmapIdwhite_arrow));
- The rotation is done later on in handleTickEvent of the screen:
float bpmAngle = 2.10 * bpm / maxBpm - 1.05;
ar00BpmArrow.updateAngles(0, 0, bpmAngle);
ar00BpmArrow.invalidate();
What exactly do you mean with "rotated application"?
The display orientation in TouchGFX Designer => Config => Display is set to landscape, but the display is square.
Do you need anything else?
Thank you very much for your interest & help!
