[display] Refactor to avoid implicit framebuffer allocation.

target/dartuinoP0/include/target/display/LS013B7DH03.h

Index: target/dartuinoP0/include/target/display/LS013B7DH03.h
diff --git a/target/dartuinoP0/include/target/display/LS013B7DH03.h b/target/dartuinoP0/include/target/display/LS013B7DH03.h
index 5f70aae0cbf98be5872ff351fe72647f6514a20d..3e389776687c98ccbea9c3ffd1643434485853fc 100644
--- a/target/dartuinoP0/include/target/display/LS013B7DH03.h
+++ b/target/dartuinoP0/include/target/display/LS013B7DH03.h
@@ -30,10 +30,11 @@
 #define MLCD_WIDTH  ((uint16_t)128)
 #define MLCD_HEIGHT ((uint16_t)128)
 
+// Ensure width corresponds to an integral number of bytes
+STATIC_ASSERT((MLCD_WIDTH & 0x3) == 0);
+
 // 1 bit per pixel divided by 8 bits per byte
 #define MLCD_BYTES_LINE  (MLCD_WIDTH / 8)
+#define MLCD_FORMAT      (DISPLAY_FORMAT_MONO_1)
 
-#define FB_FORMAT               (DISPLAY_FORMAT_MONO_1)
-#define FB_STRIDE               (MLCD_BYTES_LINE)
-
-uint8_t lcd_get_line(uint8_t *framebuffer, uint8_t idx, uint8_t *result);
+uint8_t lcd_get_line(struct display_image *image, uint8_t idx, uint8_t *result);