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testsuite: Disable certain texture download tests

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The GL renderers like to premultiply content that isn't, and due to the
data loss with alpha == 0 (transparent white, transparent black and
transparent anything are all represented by (0, 0, 0, 0) when
premultiplied) these values cannot be converted back.
This commit is contained in:
Benjamin Otte 2023-05-29 02:34:19 +02:00
parent 94a2dc4c47
commit 788bd575d6
1 changed files with 89 additions and 0 deletions
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89
testsuite/gdk/memorytexture.c
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@ -105,6 +105,74 @@ gdk_memory_format_bytes_per_pixel (GdkMemoryFormat format)
}
}
static gboolean
gdk_memory_format_has_alpha (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
case GDK_MEMORY_R32G32B32_FLOAT:
return FALSE;
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
case GDK_MEMORY_B8G8R8A8:
case GDK_MEMORY_A8R8G8B8:
case GDK_MEMORY_R8G8B8A8:
case GDK_MEMORY_A8B8G8R8:
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R32G32B32A32_FLOAT:
return TRUE;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return TRUE;
}
}
static gboolean
gdk_memory_format_is_premultiplied (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
return TRUE;
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
case GDK_MEMORY_R32G32B32_FLOAT:
case GDK_MEMORY_B8G8R8A8:
case GDK_MEMORY_A8R8G8B8:
case GDK_MEMORY_R8G8B8A8:
case GDK_MEMORY_A8B8G8R8:
case GDK_MEMORY_R16G16B16A16:
case GDK_MEMORY_R16G16B16A16_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT:
return FALSE;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return FALSE;
}
}
static gboolean
gdk_memory_format_pixel_equal (GdkMemoryFormat format,
gboolean accurate,
@ -678,6 +746,13 @@ test_download_1x1 (gconstpointer data)
create_random_color (&color);
/* these methods may premultiply during operation */
if (color.alpha == 0.f &&
!gdk_memory_format_is_premultiplied (format) &&
gdk_memory_format_has_alpha (format) &&
(method == TEXTURE_METHOD_GL || method == TEXTURE_METHOD_GL_RELEASED))
color = (GdkRGBA) { 0, 0, 0, 0 };
expected = create_texture (format, TEXTURE_METHOD_LOCAL, 1, 1, &color);
test = create_texture (format, method, 1, 1, &color);
test = ensure_texture_format (test, format);
@ -706,6 +781,13 @@ test_download_4x4 (gconstpointer data)
create_random_color (&color);
/* these methods may premultiply during operation */
if (color.alpha == 0.f &&
!gdk_memory_format_is_premultiplied (format) &&
gdk_memory_format_has_alpha (format) &&
(method == TEXTURE_METHOD_GL || method == TEXTURE_METHOD_GL_RELEASED))
color = (GdkRGBA) { 0, 0, 0, 0 };
expected = create_texture (format, TEXTURE_METHOD_LOCAL, 4, 4, &color);
test = create_texture (format, method, 4, 4, &color);
test = ensure_texture_format (test, format);
@ -731,6 +813,13 @@ test_download_192x192 (gconstpointer data)
create_random_color (&color);
/* these methods may premultiply during operation */
if (color.alpha == 0.f &&
!gdk_memory_format_is_premultiplied (format) &&
gdk_memory_format_has_alpha (format) &&
(method == TEXTURE_METHOD_GL || method == TEXTURE_METHOD_GL_RELEASED))
color = (GdkRGBA) { 0, 0, 0, 0 };
expected = create_texture (format, TEXTURE_METHOD_LOCAL, 192, 192, &color);
test = create_texture (format, method, 192, 192, &color);
test = ensure_texture_format (test, format);