[PATCH i-g-t 02/13] lib: Extract igt_buf_write_to_png() from gem_render_copy

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

From: Damien Lespiau <damien.lespiau@intel.com>

Now that the Android build has cairo, we can put cairo-dependant code
back into lib/

v2: Document image format. (Daniel Vetter)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 lib/intel_batchbuffer.c | 26 ++++++++++++++++++++++++++
 lib/intel_batchbuffer.h |  2 ++
 tests/gem_render_copy.c | 24 +++---------------------
 3 files changed, 31 insertions(+), 21 deletions(-)

diff --git a/lib/intel_batchbuffer.c b/lib/intel_batchbuffer.c
index c70f6d8..d3efc1e 100644
--- a/lib/intel_batchbuffer.c
+++ b/lib/intel_batchbuffer.c
@@ -31,6 +31,8 @@
 #include <string.h>
 #include <assert.h>
 
+#include <cairo.h>
+
 #include "drm.h"
 #include "drmtest.h"
 #include "intel_batchbuffer.h"
@@ -458,6 +460,30 @@ unsigned igt_buf_height(struct igt_buf *buf)
 }
 
 /**
+ * igt_buf_write_to_png:
+ * @buf: an i-g-t buffer object
+ *
+ * Writes the content of @buf as a PNG file.
+ * Buffer is interpreted as in RGBX format.
+ */
+void igt_buf_write_to_png(struct igt_buf *buf, const char *filename)
+{
+	cairo_surface_t *surface;
+	cairo_status_t ret;
+
+	drm_intel_bo_map(buf->bo, 0);
+	surface = cairo_image_surface_create_for_data(buf->bo->virtual,
+						      CAIRO_FORMAT_RGB24,
+						      igt_buf_width(buf),
+						      igt_buf_height(buf),
+						      buf->stride);
+	ret = cairo_surface_write_to_png(surface, filename);
+	igt_assert(ret == CAIRO_STATUS_SUCCESS);
+	cairo_surface_destroy(surface);
+	drm_intel_bo_unmap(buf->bo);
+}
+
+/**
  * igt_get_render_copyfunc:
  * @devid: pci device id
  *
diff --git a/lib/intel_batchbuffer.h b/lib/intel_batchbuffer.h
index 12f7be1..e2afc3b 100644
--- a/lib/intel_batchbuffer.h
+++ b/lib/intel_batchbuffer.h
@@ -210,6 +210,8 @@ struct igt_buf {
 unsigned igt_buf_width(struct igt_buf *buf);
 unsigned igt_buf_height(struct igt_buf *buf);
 
+void igt_buf_write_to_png(struct igt_buf *buf, const char *filename);
+
 /**
  * igt_render_copyfunc_t:
  * @batch: batchbuffer object
diff --git a/tests/gem_render_copy.c b/tests/gem_render_copy.c
index df1ac88..76f8c63 100644
--- a/tests/gem_render_copy.c
+++ b/tests/gem_render_copy.c
@@ -31,7 +31,6 @@
 
 #include <stdbool.h>
 #include <unistd.h>
-#include <cairo.h>
 #include <stdlib.h>
 #include <sys/ioctl.h>
 #include <stdio.h>
@@ -71,23 +70,6 @@ typedef struct {
 static int opt_dump_png = false;
 static int check_all_pixels = false;
 
-static void scratch_buf_write_to_png(struct igt_buf *buf, const char *filename)
-{
-	cairo_surface_t *surface;
-	cairo_status_t ret;
-
-	drm_intel_bo_map(buf->bo, 0);
-	surface = cairo_image_surface_create_for_data(buf->bo->virtual,
-						      CAIRO_FORMAT_RGB24,
-						      igt_buf_width(buf),
-						      igt_buf_height(buf),
-						      buf->stride);
-	ret = cairo_surface_write_to_png(surface, filename);
-	igt_assert(ret == CAIRO_STATUS_SUCCESS);
-	cairo_surface_destroy(surface);
-	drm_intel_bo_unmap(buf->bo);
-}
-
 static void scratch_buf_init(data_t *data, struct igt_buf *buf,
 			     int width, int height, int stride, uint32_t color)
 {
@@ -165,8 +147,8 @@ int main(int argc, char **argv)
 	scratch_buf_check(&data, &dst, WIDTH / 2, HEIGHT / 2, DST_COLOR);
 
 	if (opt_dump_png) {
-		scratch_buf_write_to_png(&src, "source.png");
-		scratch_buf_write_to_png(&dst, "destination.png");
+		igt_buf_write_to_png(&src, "source.png");
+		igt_buf_write_to_png(&dst, "destination.png");
 	}
 
 	if (opt_dump_aub) {
@@ -188,7 +170,7 @@ int main(int argc, char **argv)
 		    &dst, WIDTH / 2, HEIGHT / 2);
 
 	if (opt_dump_png)
-		scratch_buf_write_to_png(&dst, "result.png");
+		igt_buf_write_to_png(&dst, "result.png");
 
 	if (opt_dump_aub) {
 		drm_intel_gem_bo_aub_dump_bmp(dst.bo,
-- 
2.3.0

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