utils: c_draw_test_pattern() takes format name, not fourcc

We can generate test patterns for pixel formats not in DRM, so we can't
take DRM fourcc as a parameter for c_draw_test_pattern(). Switch it to
format name instead.

This is a ABI change, but it is marked as super experimental.

Also, it feels a bit odd to add non-DRM format handling to kms++. But it
feels a bit pointless to split the testpat generation to a separate
library.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

Author: tomba

kms++util/inc/kms++util/kms++util.h

@@ -90,7 +90,7 @@ extern "C" {
 struct CDrawTestPatternParameters {
 	uint32_t width;
 	uint32_t height;
-	uint32_t fourcc;;
+	const char* format_name;
 	uint8_t* buffers[4];
 	uint32_t sizes[4];
 	uint32_t pitches[4];

kms++util/src/testpat.cpp

@@ -500,7 +500,7 @@ int c_draw_test_pattern(struct CDrawTestPatternParameters* params)
 	using namespace kms;
 
 	try {
-		auto fmt = fourcc_to_pixel_format(params->fourcc);
+		auto fmt = find_pixel_format_by_name(params->format_name);
 
 		ExtCPUFramebuffer fb(params->width,
 		                     params->height,