adafruit-mirror/Adafruit_ImageReader
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Liz 2025-08-01 09:27:48 -04:00
parent 94bbaf973f
commit 04b3d3f7b7
2 changed files with 65 additions and 56 deletions
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69
Adafruit_ImageReader.cpp
View file

@ -73,7 +73,9 @@ Adafruit_Image::Adafruit_Image(void)
@brief Destructor.
@return None (void).
*/
Adafruit_Image::~Adafruit_Image(void) { dealloc(); }
Adafruit_Image::~Adafruit_Image(void) {
dealloc();
}
/*!
@brief Deallocates memory associated with Adafruit_Image object
@ -156,14 +158,14 @@ int16_t Adafruit_Image::height(void) const {
via canvas->getBuffer()) to move data in or out. Potential
for a lot of mayhem here if used wrong.
*/
void *Adafruit_Image::getCanvas(void) const {
void* Adafruit_Image::getCanvas(void) const {
if (format != IMAGE_NONE) { // Image allocated?
if (format == IMAGE_1)
return (void *)canvas.canvas1;
return (void*)canvas.canvas1;
else if (format == IMAGE_8)
return (void *)canvas.canvas8;
return (void*)canvas.canvas8;
else if (format == IMAGE_16)
return (void *)canvas.canvas16;
return (void*)canvas.canvas16;
}
return NULL;
}
@ -180,7 +182,7 @@ void *Adafruit_Image::getCanvas(void) const {
Vertical offset in pixels; top edge = 0, positive = down.
@return None (void).
*/
void Adafruit_Image::draw(Adafruit_SPITFT &tft, int16_t x, int16_t y) {
void Adafruit_Image::draw(Adafruit_SPITFT& tft, int16_t x, int16_t y) {
if (format == IMAGE_1) {
uint16_t foreground, background;
if (palette) {
@ -214,7 +216,9 @@ void Adafruit_Image::draw(Adafruit_SPITFT &tft, int16_t x, int16_t y) {
often be in pre-setup() declaration, but DOES need initializing
before any of the image loading or size functions are called!
*/
Adafruit_ImageReader::Adafruit_ImageReader(FatVolume &fs) { filesys = &fs; }
Adafruit_ImageReader::Adafruit_ImageReader(FatVolume& fs) {
filesys = &fs;
}
/*!
@brief Destructor.
@ -246,8 +250,8 @@ Adafruit_ImageReader::~Adafruit_ImageReader(void) {
@return One of the ImageReturnCode values (IMAGE_SUCCESS on successful
completion, other values on failure).
*/
ImageReturnCode Adafruit_ImageReader::drawBMP(const char *filename,
Adafruit_SPITFT &tft, int16_t x,
ImageReturnCode Adafruit_ImageReader::drawBMP(const char* filename,
Adafruit_SPITFT& tft, int16_t x,
int16_t y, boolean transact) {
uint16_t tftbuf[BUFPIXELS]; // Temp space for buffering TFT data
// Call core BMP-reading function, passing address to TFT object,
@ -270,8 +274,8 @@ ImageReturnCode Adafruit_ImageReader::drawBMP(const char *filename,
@return One of the ImageReturnCode values (IMAGE_SUCCESS on successful
completion, other values on failure).
*/
ImageReturnCode Adafruit_ImageReader::loadBMP(const char *filename,
Adafruit_Image &img) {
ImageReturnCode Adafruit_ImageReader::loadBMP(const char* filename,
Adafruit_Image& img) {
// Call core BMP-reading function. TFT and working buffer are NULL
// (unused and allocated in function, respectively), X & Y position are
// always 0 because full image is loaded (RAM permitting). Adafruit_Image
@ -308,12 +312,12 @@ ImageReturnCode Adafruit_ImageReader::loadBMP(const char *filename,
completion, other values on failure).
*/
ImageReturnCode Adafruit_ImageReader::coreBMP(
const char *filename, // SD file to load
Adafruit_SPITFT *tft, // Pointer to TFT object, or NULL if to image
uint16_t *dest, // TFT working buffer, or NULL if to canvas
const char* filename, // SD file to load
Adafruit_SPITFT* tft, // Pointer to TFT object, or NULL if to image
uint16_t* dest, // TFT working buffer, or NULL if to canvas
int16_t x, // Position if loading to TFT (else ignored)
int16_t y,
Adafruit_Image *img, // NULL if load-to-screen
Adafruit_Image* img, // NULL if load-to-screen
boolean transact) { // SD & TFT sharing bus, use transactions
ImageReturnCode status = IMAGE_ERR_FORMAT; // IMAGE_SUCCESS on valid file
@ -324,7 +328,7 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
uint8_t depth; // BMP bit depth
uint32_t compression = 0; // BMP compression mode
uint32_t colors = 0; // Number of colors in palette
uint16_t *quantized = NULL; // 16-bit 5/6/5 color palette
uint16_t* quantized = NULL; // 16-bit 5/6/5 color palette
uint32_t rowSize; // >bmpWidth if scanline padding
uint8_t sdbuf[3 * BUFPIXELS]; // BMP read buf (R+G+B/pixel)
#if ((3 * BUFPIXELS) <= 255)
@ -333,7 +337,7 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
uint16_t srcidx = sizeof sdbuf;
#endif
uint32_t destidx = 0;
uint8_t *dest1 = NULL; // Dest ptr for 1-bit BMPs to img
uint8_t* dest1 = NULL; // Dest ptr for 1-bit BMPs to img
boolean flip = true; // BMP is stored bottom-to-top
uint32_t bmpPos = 0; // Next pixel position in file
int loadWidth, loadHeight, // Region being loaded (clipped)
@ -450,7 +454,7 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
}
if ((depth >= 16) ||
(quantized = (uint16_t *)malloc(colors * sizeof(uint16_t)))) {
(quantized = (uint16_t*)malloc(colors * sizeof(uint16_t)))) {
if (depth < 16) {
// Load and quantize color table
for (uint16_t c = 0; c < colors; c++) {
@ -529,8 +533,8 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
}
} else { // Canvas is simpler,
file.read(sdbuf, sizeof sdbuf); // just load sdbuf
} // (destidx never resets)
srcidx = 0; // Reset bmp buf index
} // (destidx never resets)
srcidx = 0; // Reset bmp buf index
}
if (depth == 24) {
// Convert each pixel from BMP to 565 format, save in dest
@ -564,7 +568,7 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
}
}
}
} // end pixel loop
} // end pixel loop
if (tft) { // Drawing to TFT?
if (destidx) { // Any remainders?
// See notes above re: DMA
@ -584,11 +588,11 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
img->palette = quantized; // Keep palette with img
}
} // end depth>24 or quantized malloc OK
} // end top/left clip
} // end malloc check
} // end depth check
} // end planes/compression check
} // end signature
} // end top/left clip
} // end malloc check
} // end depth check
} // end planes/compression check
} // end signature
file.close();
return status;
@ -605,10 +609,9 @@ ImageReturnCode Adafruit_ImageReader::coreBMP(
@return One of the ImageReturnCode values (IMAGE_SUCCESS on successful
completion, other values on failure).
*/
ImageReturnCode Adafruit_ImageReader::bmpDimensions(const char *filename,
int32_t *width,
int32_t *height) {
ImageReturnCode Adafruit_ImageReader::bmpDimensions(const char* filename,
int32_t* width,
int32_t* height) {
ImageReturnCode status = IMAGE_ERR_FILE_NOT_FOUND; // Guilty until innocent
if ((file = filesys->open(filename, FILE_READ))) { // Open requested file
@ -643,7 +646,7 @@ ImageReturnCode Adafruit_ImageReader::bmpDimensions(const char *filename,
@return Unsigned 16-bit value, native endianism.
*/
uint16_t Adafruit_ImageReader::readLE16(void) {
#if !defined(ESP32) && !defined(ESP8266) && \
#if !defined(ESP32) && !defined(ESP8266) && \
(__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
// Read directly into result -- BMP data and variable both little-endian.
uint16_t result;
@ -662,7 +665,7 @@ uint16_t Adafruit_ImageReader::readLE16(void) {
@return Unsigned 32-bit value, native endianism.
*/
uint32_t Adafruit_ImageReader::readLE32(void) {
#if !defined(ESP32) && !defined(ESP8266) && \
#if !defined(ESP32) && !defined(ESP8266) && \
(__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
// Read directly into result -- BMP data and variable both little-endian.
uint32_t result;
@ -684,7 +687,7 @@ uint32_t Adafruit_ImageReader::readLE32(void) {
Output stream (Serial default if unspecified).
@return None (void).
*/
void Adafruit_ImageReader::printStatus(ImageReturnCode stat, Stream &stream) {
void Adafruit_ImageReader::printStatus(ImageReturnCode stat, Stream& stream) {
if (stat == IMAGE_SUCCESS)
stream.println(F("Success!"));
else if (stat == IMAGE_ERR_FILE_NOT_FOUND)

52
Adafruit_ImageReader.h
View file

@ -39,42 +39,48 @@ enum ImageFormat {
ImageReader.loadBMP() and Image.draw(), not ImageReader.drawBMP().
*/
class Adafruit_Image {
public:
public:
Adafruit_Image(void);
~Adafruit_Image(void);
int16_t width(void) const; // Return image width in pixels
int16_t height(void) const; // Return image height in pixels
void draw(Adafruit_SPITFT &tft, int16_t x, int16_t y);
void draw(Adafruit_SPITFT& tft, int16_t x, int16_t y);
/*!
@brief Return canvas image format.
@return An ImageFormat type: IMAGE_1 for a GFXcanvas1, IMAGE_8 for
a GFXcanvas8, IMAGE_16 for a GFXcanvas16, IMAGE_NONE if no
canvas currently allocated.
*/
ImageFormat getFormat(void) const { return (ImageFormat)format; }
void *getCanvas(void) const;
ImageFormat getFormat(void) const {
return (ImageFormat)format;
}
void* getCanvas(void) const;
/*!
@brief Return pointer to color palette.
@return Pointer to an array of 16-bit color values, or NULL if no
palette associated with image.
*/
uint16_t *getPalette(void) const { return palette; }
uint16_t* getPalette(void) const {
return palette;
}
/*!
@brief Return pointer to 1bpp image mask canvas.
@return GFXcanvas1* pointer (1-bit RAM-resident image) if present,
NULL otherwise.
*/
GFXcanvas1 *getMask(void) const { return mask; };
GFXcanvas1* getMask(void) const {
return mask;
};
protected:
protected:
// MOST OF THESE ARE NOT SUPPORTED YET -- WIP
union { // Single pointer, only one variant is used:
GFXcanvas1 *canvas1; ///< Canvas object if 1bpp format
GFXcanvas8 *canvas8; ///< Canvas object if 8bpp format
GFXcanvas16 *canvas16; ///< Canvas object if 16bpp
GFXcanvas1* canvas1; ///< Canvas object if 1bpp format
GFXcanvas8* canvas8; ///< Canvas object if 8bpp format
GFXcanvas16* canvas16; ///< Canvas object if 16bpp
} canvas; ///< Union of different GFXcanvas types
GFXcanvas1 *mask; ///< 1bpp image mask (or NULL)
uint16_t *palette; ///< Color palette for 8bpp image (or NULL)
GFXcanvas1* mask; ///< 1bpp image mask (or NULL)
uint16_t* palette; ///< Color palette for 8bpp image (or NULL)
uint8_t format; ///< Canvas bundle type in use
void dealloc(void); ///< Free/deinitialize variables
friend class Adafruit_ImageReader; ///< Loading occurs here
@ -93,21 +99,21 @@ protected:
for use.
*/
class Adafruit_ImageReader {
public:
Adafruit_ImageReader(FatVolume &fs);
public:
Adafruit_ImageReader(FatVolume& fs);
~Adafruit_ImageReader(void);
ImageReturnCode drawBMP(const char *filename, Adafruit_SPITFT &tft, int16_t x,
ImageReturnCode drawBMP(const char* filename, Adafruit_SPITFT& tft, int16_t x,
int16_t y, boolean transact = true);
ImageReturnCode loadBMP(const char *filename, Adafruit_Image &img);
ImageReturnCode bmpDimensions(const char *filename, int32_t *w, int32_t *h);
void printStatus(ImageReturnCode stat, Stream &stream = Serial);
ImageReturnCode loadBMP(const char* filename, Adafruit_Image& img);
ImageReturnCode bmpDimensions(const char* filename, int32_t* w, int32_t* h);
void printStatus(ImageReturnCode stat, Stream& stream = Serial);
protected:
FatVolume *filesys; ///< FAT FileSystem Object
protected:
FatVolume* filesys; ///< FAT FileSystem Object
File32 file; ///< Current Open file
ImageReturnCode coreBMP(const char *filename, Adafruit_SPITFT *tft,
uint16_t *dest, int16_t x, int16_t y,
Adafruit_Image *img, boolean transact);
ImageReturnCode coreBMP(const char* filename, Adafruit_SPITFT* tft,
uint16_t* dest, int16_t x, int16_t y,
Adafruit_Image* img, boolean transact);
uint16_t readLE16(void);
uint32_t readLE32(void);
};