Embedded Artists / DMBasicGUI

A basic graphics package for the LPC4088 Display Module.

Dependents:   lpc4088_displaymodule_demo_sphere sampleGUI sampleEmptyGUI lpc4088_displaymodule_fs_aid ... more

Fork of DMBasicGUI by EmbeddedArtists AB

Application/Image.h@0:4977187e90c7, 2014-12-11 (annotated)

Committer:
embeddedartists
Date:
Thu Dec 11 11:03:57 2014 +0000
Revision:
0:4977187e90c7
Child:
1:46c8df4608c8
First version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
embeddedartists 0:4977187e90c7 1
embeddedartists 0:4977187e90c7 2 #ifndef IMAGE_H
embeddedartists 0:4977187e90c7 3 #define IMAGE_H
embeddedartists 0:4977187e90c7 4
embeddedartists 0:4977187e90c7 5 /**
embeddedartists 0:4977187e90c7 6 * LcdController example
embeddedartists 0:4977187e90c7 7 *
embeddedartists 0:4977187e90c7 8 * @code
embeddedartists 0:4977187e90c7 9 * #include "mbed.h"
embeddedartists 0:4977187e90c7 10 * #include "Image.h"
embeddedartists 0:4977187e90c7 11 *
embeddedartists 0:4977187e90c7 12 * const unsigned char cube_image1[] = { 137,80,78,71, ... };
embeddedartists 0:4977187e90c7 13 * int cube_image1_sz = sizeof(cube_image1);
embeddedartists 0:4977187e90c7 14 *
embeddedartists 0:4977187e90c7 15 * int main(void) {
embeddedartists 0:4977187e90c7 16 * // initialize the display
embeddedartists 0:4977187e90c7 17 * ...
embeddedartists 0:4977187e90c7 18 *
embeddedartists 0:4977187e90c7 19 * // decode an image from an array
embeddedartists 0:4977187e90c7 20 * Image::ImageData_t img;
embeddedartists 0:4977187e90c7 21 * if (Image::decode(cube_image1, cube_image1_sz, &img) == 0) {
embeddedartists 0:4977187e90c7 22 * // draw on display using img.pixels, img.width and img.height
embeddedartists 0:4977187e90c7 23 * ...
embeddedartists 0:4977187e90c7 24 * free(img.pixels);
embeddedartists 0:4977187e90c7 25 * }
embeddedartists 0:4977187e90c7 26 *
embeddedartists 0:4977187e90c7 27 * // decode an image from a file
embeddedartists 0:4977187e90c7 28 * if (Image::decode("/ram/image.png", &img) == 0) {
embeddedartists 0:4977187e90c7 29 * // draw on display using img.pixels, img.width and img.height
embeddedartists 0:4977187e90c7 30 * ...
embeddedartists 0:4977187e90c7 31 * free(img.pixels);
embeddedartists 0:4977187e90c7 32 * }
embeddedartists 0:4977187e90c7 33 * }
embeddedartists 0:4977187e90c7 34 * @endcode
embeddedartists 0:4977187e90c7 35 */
embeddedartists 0:4977187e90c7 36 class Image {
embeddedartists 0:4977187e90c7 37 public:
embeddedartists 0:4977187e90c7 38
embeddedartists 0:4977187e90c7 39 enum Type {
embeddedartists 0:4977187e90c7 40 BMP = 0,
embeddedartists 0:4977187e90c7 41 PNG,
embeddedartists 0:4977187e90c7 42 UNKNOWN
embeddedartists 0:4977187e90c7 43 };
embeddedartists 0:4977187e90c7 44
embeddedartists 0:4977187e90c7 45 enum Resolution {
embeddedartists 0:4977187e90c7 46 RES_16BIT,
embeddedartists 0:4977187e90c7 47 RES_24BIT
embeddedartists 0:4977187e90c7 48 };
embeddedartists 0:4977187e90c7 49
embeddedartists 0:4977187e90c7 50 typedef struct {
embeddedartists 0:4977187e90c7 51 uint16_t* pixels;
embeddedartists 0:4977187e90c7 52 uint32_t width;
embeddedartists 0:4977187e90c7 53 uint32_t height;
embeddedartists 0:4977187e90c7 54 Resolution res;
embeddedartists 0:4977187e90c7 55 } ImageData_t;
embeddedartists 0:4977187e90c7 56
embeddedartists 0:4977187e90c7 57 /** Decodes the specified image data
embeddedartists 0:4977187e90c7 58 *
embeddedartists 0:4977187e90c7 59 * Note that if this function returns a zero, indicating success,
embeddedartists 0:4977187e90c7 60 * the pixels member of the pDataOut structure must be
embeddedartists 0:4977187e90c7 61 * deallocated using lpc_free() when no longer needed.
embeddedartists 0:4977187e90c7 62 *
embeddedartists 0:4977187e90c7 63 * @param pDataIn the image data
embeddedartists 0:4977187e90c7 64 * @param sizeIn the number of bytes in the pDataIn array
embeddedartists 0:4977187e90c7 65 * @param Resolution the format of the display
embeddedartists 0:4977187e90c7 66 * @param pDataOut the decoded image (only valid if 0 is returned)
embeddedartists 0:4977187e90c7 67 *
embeddedartists 0:4977187e90c7 68 * @returns
embeddedartists 0:4977187e90c7 69 * 0 on success
embeddedartists 0:4977187e90c7 70 * 1 on failure
embeddedartists 0:4977187e90c7 71 */
embeddedartists 0:4977187e90c7 72 static int decode(const unsigned char* pDataIn, unsigned int sizeIn, Resolution res, ImageData_t* pDataOut);
embeddedartists 0:4977187e90c7 73
embeddedartists 0:4977187e90c7 74 static int decode(const char* filename, Resolution res, ImageData_t* pDataOut);
embeddedartists 0:4977187e90c7 75
embeddedartists 0:4977187e90c7 76 private:
embeddedartists 0:4977187e90c7 77
embeddedartists 0:4977187e90c7 78 /** No instance needed
embeddedartists 0:4977187e90c7 79 *
embeddedartists 0:4977187e90c7 80 */
embeddedartists 0:4977187e90c7 81 Image();
embeddedartists 0:4977187e90c7 82
embeddedartists 0:4977187e90c7 83 static Type imageType(const unsigned char* pDataIn, unsigned int sizeIn);
embeddedartists 0:4977187e90c7 84
embeddedartists 0:4977187e90c7 85 static uint32_t fileSize(FILE* f);
embeddedartists 0:4977187e90c7 86 };
embeddedartists 0:4977187e90c7 87
embeddedartists 0:4977187e90c7 88 #endif
embeddedartists 0:4977187e90c7 89