I was looking through the API and found at line 246:
uint32_t vexImageBmpRead( const uint8_t *ibuf, v5_image *oBuf, uint32_t maxw, uint32_t maxh > );
uint32_t vexImagePngRead( const uint8_t *ibuf, v5_image *oBuf, uint32_t maxw, uint32_t maxh, > uint32_t ibuflen );
// special use only ! Talk to James.
I was wondering if the image commands could be used but first I would like to ask @jpearman
Well, yes, but I wouldn’t use those as they are rather low level and part of the C API that everything is built on. Use the functions available on Brain.Screen, they automatically deal with things like memory management and file type detection.
from vex_brain.h
/**
* @brief Draws an image on the screen using the contents of the memory buffer.
* @param buffer A pointer to a buffer containing image data in either bmp or png format.
* @param x The x-coordinate at which the left edge of the image will be drawn.
* @param y The y-coordinate at which the top edge of the image will be drawn.
* @param bufferLen The size of the source image buffer in bytes.
* @return Returns true if the image was successfully drawn on the screen.
* @details
* This function draws an image on the screen using the contents of a buffer into which
* either BMP or PNG raw data has already been read. The contents may have come from a
* file on the SD card or have been statically declared in the code. The image should be
* no larger than the V5 Screen, that is, a maximum of 480 pixels wide by 272 pixels high.
* The top/left corner of the image is placed at the coordinates given by x and y, these can
* be negative if desired.
*/
bool drawImageFromBuffer( uint8_t *buffer, int x, int y, int bufferLen );
/**
* @brief Draws an image on the screen using the contents of the memory buffer.
* @param buffer A pointer to a buffer containing raw 32 bit per pixel image data.
* @param x The x-coordinate at which the left edge of the image will be drawn.
* @param y The y-coordinate at which the top edge of the image will be drawn.
* @param width The width of the image.
* @param height The height of the image.
* @return Returns true if the image was successfully drawn on the screen.
* @details
* This funtion draws an image on the screen using the contents of a buffer into which
* raw RGB pixels have been placed. Each pixel is represented by a 32 bit value, however,
* only the lower 24 bits are used as transparency is not yet supported. The buffer contains
* pixels for the first row of the image immediately followed by pixels for the second row and so on.
* The image should be no larger than the V5 Screen, that is, a maximum of 480 pixels wide by 272 pixels high.
* The top/left corner of the image is placed at the coordinates given by x and y, these can
* be negative if desired.
*/
bool drawImageFromBuffer( uint32_t *buffer, int x, int y, int width, int height );
/**
* @brief Draws an image on the screen using a file on the SD Card as the source.
* @param name The name of the image, it must have either a ".bmp" or ".png" extension.
* @param x The x-coordinate at which the left edge of the image will be drawn.
* @param y The y-coordinate at which the top edge of the image will be drawn.
* @return Returns true if the image was successfully drawn on the screen.
* @details
* This funtion draws an image on the screen using the contents of a file on an SD Card.
* The file should be no larger than 512K bytes and must have either a ".bmp" or ".png" extension.
* The image should be no larger than the V5 Screen, that is, a maximum of 480 pixels wide by 272 pixels high.
* The top/left corner of the image is placed at the coordinates given by x and y, these can
* be negative if desired.
*/
bool drawImageFromFile( const char *name, int x, int y );
Oh, and the comment about talking to me refers to the function that follows, not the image reading ones.
could you show an implementation of the drawImageFromBuffer method with 5 arguments. I am having issues when implementing it of it asking for 4 arguments if there is 5 and 5 if there is four.