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test/alloc: document test_layer and test_setup

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This commit is contained in:
Simon Ser 2021-06-24 19:05:01 +02:00
parent 799dddd6c4
commit 1616f8ae6a
1 changed files with 11 additions and 0 deletions
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11
test/test_alloc.c
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@ -30,11 +30,17 @@ struct test_plane {
int type;
};
/* This structure describes a layer in a test case. The first block of fields
* describe the layer properties: geometry, vertical ordering, etc. The `compat`
* field describes which hardware planes the layer is compatible with. The
* `result` field describes the expected hardware plane returned by libliftoff.
*/
struct test_layer {
int x, y, width, height;
int zpos; /* zero means unset */
bool composition;
bool force_composited;
struct test_plane *compat[64];
struct test_plane *result;
};
@ -44,6 +50,11 @@ struct test_case {
struct test_layer layers[64];
};
/* This array describes the hardware we're going to perform the tests with. Our
* hardware has one primary plane at the bottom position, two overlay planes
* at the middle position (with undefined ordering between themselves), and one
* cursor plane at the top.
*/
static struct test_plane test_setup[] = {
{ .type = DRM_PLANE_TYPE_PRIMARY }, /* zpos = 0 */
{ .type = DRM_PLANE_TYPE_CURSOR }, /* zpos = 2 */