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test-utils: Expose the compare_pixel function

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The compare pixel function was a static function used internally by
the test_utils_check_* functions. It takes a pointer to a pixel in a
buffer read back from Cogl and compares it with an expected value.
This function could also be useful in tests wanting to check the data
returned from a call to cogl_texture_get_data so we should share it
with the rest of the tests.

https://bugzilla.gnome.org/show_bug.cgi?id=668913

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts 2012-01-28 13:40:22 +00:00
parent bd6810de10
commit cd9e1be6ae
2 changed files with 17 additions and 4 deletions
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8
tests/conform/test-utils.c
View File

@ -85,8 +85,8 @@ compare_component (int a, int b)
return ABS (a - b) <= 1; return ABS (a - b) <= 1;
} }
static void void
compare_pixel (const guint8 *screen_pixel, guint32 expected_pixel) test_utils_compare_pixel (const guint8 *screen_pixel, guint32 expected_pixel)
{ {
/* Compare each component with a small fuzz factor */ /* Compare each component with a small fuzz factor */
if (!compare_component (screen_pixel[0], expected_pixel >> 24) || if (!compare_component (screen_pixel[0], expected_pixel >> 24) ||
@ -115,7 +115,7 @@ test_utils_check_pixel (int x, int y, guint32 expected_pixel)
COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_PIXEL_FORMAT_RGBA_8888_PRE,
pixel); pixel);
compare_pixel (pixel, expected_pixel); test_utils_compare_pixel (pixel, expected_pixel);
} }
void void
@ -144,7 +144,7 @@ test_utils_check_region (int x, int y,
for (y = 0; y < height; y++) for (y = 0; y < height; y++)
for (x = 0; x < width; x++) for (x = 0; x < width; x++)
{ {
compare_pixel (p, expected_rgba); test_utils_compare_pixel (p, expected_rgba);
p += 4; p += 4;
} }

13
tests/conform/test-utils.h
View File

@ -88,4 +88,17 @@ test_utils_check_region (int x, int y,
int width, int height, int width, int height,
guint32 expected_rgba); guint32 expected_rgba);
/*
* test_utils_compare_pixel:
* @screen_pixel: A pixel stored in memory
* @expected_pixel: The expected RGBA value
*
* Compares a pixel from a buffer to an expected value. The pixels are
* converted to a string and compared with g_assert_cmpstr so that if
* the comparison fails then the assert will display a meaningful
* message.
*/
void
test_utils_compare_pixel (const guint8 *screen_pixel, guint32 expected_pixel);
#endif /* _TEST_UTILS_H_ */ #endif /* _TEST_UTILS_H_ */