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testsuite: Imitate gdk_memory_convert() correctly

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The formula use to compute pixel values from GdkRGBA floats was slightly
adapted some time ago, copy that adaptation
This commit is contained in:
Benjamin Otte
2023-05-29 23:32:25 +02:00
parent 21c53a1969
commit 169a7f83e6
1 changed files with 18 additions and 18 deletions
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36
testsuite/gdk/memorytexture.c
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@@ -183,18 +183,18 @@ set_pixel_u8 (guchar *data,
const GdkRGBA *color)
{
if (a >= 0)
data[a] = CLAMP (color->alpha * 256.f, 0.f, 255.f);
data[a] = CLAMP (color->alpha * 255.f + 0.5f, 0.f, 255.f);
if (premultiply)
{
data[r] = CLAMP (color->red * color->alpha * 256.f, 0.f, 255.f);
data[g] = CLAMP (color->green * color->alpha * 256.f, 0.f, 255.f);
data[b] = CLAMP (color->blue * color->alpha * 256.f, 0.f, 255.f);
data[r] = CLAMP (color->red * color->alpha * 255.f + 0.5f, 0.f, 255.f);
data[g] = CLAMP (color->green * color->alpha * 255.f + 0.5f, 0.f, 255.f);
data[b] = CLAMP (color->blue * color->alpha * 255.f + 0.5f, 0.f, 255.f);
}
else
{
data[r] = CLAMP (color->red * 256.f, 0.f, 255.f);
data[g] = CLAMP (color->green * 256.f, 0.f, 255.f);
data[b] = CLAMP (color->blue * 256.f, 0.f, 255.f);
data[r] = CLAMP (color->red * 255.f + 0.5f, 0.f, 255.f);
data[g] = CLAMP (color->green * 255.f + 0.5f, 0.f, 255.f);
data[b] = CLAMP (color->blue * 255.f + 0.5f, 0.f, 255.f);
}
}
@@ -257,9 +257,9 @@ texture_builder_set_pixel (TextureBuilder *builder,
case GDK_MEMORY_R16G16B16:
{
guint16 pixels[3] = {
CLAMP (color->red * color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->green * color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->blue * color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->red * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->green * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->blue * color->alpha * 65535.f + 0.5f, 0, 65535.f),
};
memcpy (data, pixels, 3 * sizeof (guint16));
}
@@ -267,10 +267,10 @@ texture_builder_set_pixel (TextureBuilder *builder,
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
{
guint16 pixels[4] = {
CLAMP (color->red * color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->green * color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->blue * color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->red * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->green * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->blue * color->alpha * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->alpha * 65535.f + 0.5f, 0, 65535.f),
};
memcpy (data, pixels, 4 * sizeof (guint16));
}
@@ -278,10 +278,10 @@ texture_builder_set_pixel (TextureBuilder *builder,
case GDK_MEMORY_R16G16B16A16:
{
guint16 pixels[4] = {
CLAMP (color->red * 65536.f, 0, 65535.f),
CLAMP (color->green * 65536.f, 0, 65535.f),
CLAMP (color->blue * 65536.f, 0, 65535.f),
CLAMP (color->alpha * 65536.f, 0, 65535.f),
CLAMP (color->red * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->green * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->blue * 65535.f + 0.5f, 0, 65535.f),
CLAMP (color->alpha * 65535.f + 0.5f, 0, 65535.f),
};
memcpy (data, pixels, 4 * sizeof (guint16));
}