Adding GDISP_IMAGE_PNG_BLIT_BUFFER_SIZE configuration option

changelog.txt

@@ -10,6 +10,7 @@ FIX:		Ensure valid thread stack sizes on platforms where it matters
 FEATURE:	Add support for a GFILE user provided file system
 FEATURE:	Add gwinListItemSetText() to replace text in a GWIN list item
 FEATURE:	Added GDISP_IMAGE_BMP_BLIT_BUFFER_SIZE configuration option
+FEATURE:	Added GDISP_IMAGE_PNG_BLIT_BUFFER_SIZE configuration option
 
 
 *** Release 2.7 ***

gfxconf.example.h

@@ -136,6 +136,7 @@
 //        #define GDISP_NEED_IMAGE_PNG_RGB_16          TRUE
 //        #define GDISP_NEED_IMAGE_PNG_RGBALPHA_8      TRUE
 //        #define GDISP_NEED_IMAGE_PNG_RGBALPHA_16     TRUE
+//        #define GDISP_IMAGE_PNG_BLIT_BUFFER_SIZE     32
 //    #define GDISP_NEED_IMAGE_ACCOUNTING              FALSE
 
 //#define GDISP_NEED_PIXMAP                            FALSE

src/gdisp/gdisp_image_png.c

@@ -11,11 +11,6 @@
 
 #include "gdisp_image_support.h"
 
-/**
- * How big a pixel array to allocate for blitting the image to the display (in pixels)
- * Bigger is faster but uses more RAM.
- */
-#define PNG_BLIT_BUFFER_SIZE	32
 /**
  * How big a byte array to use for input file buffer
  * Bigger is faster but uses more RAM.
@@ -89,7 +84,7 @@ typedef struct PNG_output {
 	coord_t		sx, sy;
 	coord_t		ix, iy;
 	unsigned	cnt;
-	pixel_t		buf[PNG_BLIT_BUFFER_SIZE];
+	pixel_t		buf[GDISP_IMAGE_PNG_BLIT_BUFFER_SIZE];
 	} PNG_output;
 
 // Handle the PNG scan line filter

src/gdisp/gdisp_options.h

@@ -518,6 +518,14 @@
 	#ifndef GDISP_NEED_IMAGE_PNG_RGBALPHA_16
 		#define GDISP_NEED_IMAGE_PNG_RGBALPHA_16		TRUE
 	#endif
+	/**
+	 * @brief   The PNG blit buffer size in pixels.
+	 * @details	Defaults to TRUE
+	 * @note 	Bigger is faster but requires more RAM.
+	 */
+	#ifndef GDISP_IMAGE_PNG_BLIT_BUFFER_SIZE
+		#define GDISP_IMAGE_PNG_BLIT_BUFFER_SIZE	32
+	#endif
 /**
  * @}
  *