twain image acquire (copilot)

twain_acquire.c

#include <stdio.h>
#include <twain.h>

// Function to initialize TWAIN
TW_UINT16 InitializeTwain(TW_IDENTITY *appId, TW_IDENTITY *sourceId) {
    TW_UINT16 rc;
    rc = DSM_Entry(appId, NULL, DG_CONTROL, DAT_PARENT, MSG_OPENDSM, (TW_MEMREF)NULL);
    if (rc != TWRC_SUCCESS) return rc;

    rc = DSM_Entry(appId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_GETDEFAULT, sourceId);
    if (rc != TWRC_SUCCESS) return rc;

    rc = DSM_Entry(appId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_OPENDS, sourceId);
    return rc;
}

// Function to acquire image
TW_UINT16 AcquireImage(TW_IDENTITY *appId, TW_IDENTITY *sourceId) {
    TW_UINT16 rc;
    TW_IMAGEINFO imageInfo;
    TW_IMAGEMEMXFER imageMemXfer;

    rc = DSM_Entry(appId, sourceId, DG_IMAGE, DAT_IMAGENATIVEXFER, MSG_GET, &imageMemXfer);
    if (rc != TWRC_SUCCESS) return rc;

    // Save the image data to a file
    FILE *file = fopen("scanned_image.bmp", "wb");
    if (file) {
        fwrite(imageMemXfer.Memory.TheMem, 1, imageMemXfer.Memory.Length, file);
        fclose(file);
    }

    return rc;
}

int main() {
    TW_IDENTITY appId = {0};
    TW_IDENTITY sourceId = {0};
    TW_UINT16 rc;

    // Initialize TWAIN
    rc = InitializeTwain(&appId, &sourceId);
    if (rc != TWRC_SUCCESS) {
        printf("Failed to initialize TWAIN: %d\n", rc);
        return 1;
    }

    // Acquire image
    rc = AcquireImage(&appId, &sourceId);
    if (rc != TWRC_SUCCESS) {
        printf("Failed to acquire image: %d\n", rc);
        return 1;
    }

    // Close the data source and DSM
    DSM_Entry(&appId, NULL, DG_CONTROL, DAT_IDENTITY, MSG_CLOSEDS, &sourceId);
    DSM_Entry(&appId, NULL, DG_CONTROL, DAT_PARENT, MSG_CLOSEDSM, (TW_MEMREF)NULL);

    printf("Image acquired successfully.\n");
    return 0;
}