How to add images at runtime (jpg)
I tried using the Jpeg Loader here: Loading Images at Runtime | TouchGFX Documentation
but when I use it it causes a hardfault in JPEGFileLoader::readJPEGFile -> jpeg_start_decompress -> master_selection -> jinit_d_main_controller -> (line 482) main = (my_main_ptr)(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,SIZEOF(my_main_controller));
I found that the hardfault here is caused by the master_selection calling jinit_d_coef_controller before jinit_d_main_controller, and in this function (jinit_d_coef_controller ) the "cinfo" variable gets destroyed in an "ERREXIT" (D_MULTISCAN_FILES_SUPPORTED is not defined in any file, and even if I define it manually it still hardfaults).
I don't know what the functions are actually supposed to do, and I don't know how to fix this.
Is there a workaround? or a new Loader file? (I downloaded the zip file from the documentation)
I'm attaching the hardfaulted function - jinit_d_main_controller, the jinit_d_coef_controller , and how I'm calling the JpegLoader.
calling the JpegLoader in screenView.cpp:
uint8_t lineBuffer[320*3]; //global
void Screen_1View::loadJpegImages(touchgfx::Image* image, const char* name, int x, int y)
{
uint16_t width, height;
FS_FILE* f = FS_FOpen(name, "rb");
if (!f)
return;
JPEGFileLoader::getJPEGDimensions(f, width, height);
BitmapId bmpId;
//create dynamic bitmap matching file dimensions and in format matching LCD
if (HAL::lcd().bitDepth() == 16)
{
bmpId = Bitmap::dynamicBitmapCreate(width, height, Bitmap::RGB565);
}
else
{
bmpId = Bitmap::dynamicBitmapCreate(width, height, Bitmap::RGB888);
}
if (bmpId != BITMAP_INVALID)
{
//Succesfully created, load JPEG file to bitmap
if (file_type == FILE_TYPE_NONE)
JPEGFileLoader::readJPEGFile(Bitmap(bmpId), f, lineBuffer);
//Image shall show the loaded bitmap
image->setBitmap(Bitmap(bmpId));
//Position image and add to View
image->setXY(x, y);
add(*image);
//image->invalidate();
}
}jinit_d_main_controller: (hardfault in line 8)
GLOBAL(void)
jinit_d_main_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
{
my_main_ptr main;
int ci, rgroup, ngroups;
jpeg_component_info *compptr;
main = (my_main_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_main_controller));
cinfo->main = (struct jpeg_d_main_controller *) main;
main->pub.start_pass = start_pass_main;
if (need_full_buffer) /* shouldn't happen */
ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
/* Allocate the workspace.
* ngroups is the number of row groups we need.
*/
if (cinfo->upsample->need_context_rows) {
if (cinfo->min_DCT_v_scaled_size < 2) /* unsupported, see comments above */
ERREXIT(cinfo, JERR_NOTIMPL);
alloc_funny_pointers(cinfo); /* Alloc space for xbuffer[] lists */
ngroups = cinfo->min_DCT_v_scaled_size + 2;
} else {
ngroups = cinfo->min_DCT_v_scaled_size;
}
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
main->buffer[ci] = (*cinfo->mem->alloc_sarray)
((j_common_ptr) cinfo, JPOOL_IMAGE,
compptr->width_in_blocks * compptr->DCT_h_scaled_size,
(JDIMENSION) (rgroup * ngroups));
}
}jinit_d_coef_controller :
GLOBAL(void)
jinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
{
my_coef_ptr coef;
coef = (my_coef_ptr)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_coef_controller));
cinfo->coef = (struct jpeg_d_coef_controller *) coef;
coef->pub.start_input_pass = start_input_pass;
coef->pub.start_output_pass = start_output_pass;
#ifdef BLOCK_SMOOTHING_SUPPORTED
coef->coef_bits_latch = NULL;
#endif
/* Create the coefficient buffer. */
if (need_full_buffer) {
#ifdef D_MULTISCAN_FILES_SUPPORTED
/* Allocate a full-image virtual array for each component, */
/* padded to a multiple of samp_factor DCT blocks in each direction. */
/* Note we ask for a pre-zeroed array. */
int ci, access_rows;
jpeg_component_info *compptr;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
access_rows = compptr->v_samp_factor;
#ifdef BLOCK_SMOOTHING_SUPPORTED
/* If block smoothing could be used, need a bigger window */
if (cinfo->progressive_mode)
access_rows *= 3;
#endif
coef->whole_image[ci] = (*cinfo->mem->request_virt_barray)
((j_common_ptr) cinfo, JPOOL_IMAGE, TRUE,
(JDIMENSION) jround_up((long) compptr->width_in_blocks,
(long) compptr->h_samp_factor),
(JDIMENSION) jround_up((long) compptr->height_in_blocks,
(long) compptr->v_samp_factor),
(JDIMENSION) access_rows);
}
coef->pub.consume_data = consume_data;
coef->pub.decompress_data = decompress_data;
coef->pub.coef_arrays = coef->whole_image; /* link to virtual arrays */
#else
ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif
} else {
/* We only need a single-MCU buffer. */
JBLOCKROW buffer;
int i;
buffer = (JBLOCKROW)
(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
for (i = 0; i < D_MAX_BLOCKS_IN_MCU; i++) {
coef->MCU_buffer[i] = buffer + i;
}
if (cinfo->lim_Se == 0) /* DC only case: want to bypass later */
FMEMZERO((void FAR *) buffer,
(size_t) (D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)));
coef->pub.consume_data = dummy_consume_data;
coef->pub.decompress_data = decompress_onepass;
coef->pub.coef_arrays = NULL; /* flag for no virtual arrays */
}
}Any help is appreciated!