Complete display + add JPEG

components/display/core/gds_image.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <stdint.h>
+#include "esp_err.h"
+
+// no progressive JPEG handling
+
+struct GDS_Device;
+
+enum { GDS_RGB565, GDS_RGB555, GDS_RGB444 };
+
+#define GDS_IMAGE_TOP		0x00
+#define GDS_IMAGE_CENTER_X	0x01
+#define GDS_IMAGE_CENTER_Y	0x02
+#define GDS_IMAGE_CENTER	(GDS_IMAGE_CENTER_X | GDS_IMAGE_CENTER_Y)
+#define GDS_IMAGE_FIT		0x10
+
+// Width and Height can be NULL if you already know them (actual scaling is closest ^2)
+uint16_t* 	GDS_DecodeJPEG(uint8_t *Source, int *Width, int *Height, float Scale);
+void	 	GDS_GetJPEGSize(uint8_t *Source, int *Width, int *Height);
+void 		GDS_DrawRGB16( struct GDS_Device* Device, uint16_t *Image, int x, int y, int Width, int Height, int RGB_Mode );
+// set DisplayWidth and DisplayHeight to non-zero if you want autoscale to closest factor ^2 from 0..3
+bool 		GDS_DrawJPEG( struct GDS_Device* Device, uint8_t *Source, int x, int y, int Fit);