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memoryformat: Add a fastpath for RGBA8 <=> BGRA8

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Cairo is using BGRA8 but we want to use RGBA8 because it's the canonical
GL format.

So getting this fast sounds useful.
This commit is contained in:
Benjamin Otte 2024-09-14 19:59:29 +02:00
parent 01aafc6e65
commit bba7979670
1 changed files with 26 additions and 0 deletions
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26
gdk/gdkmemoryformat.c
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@ -325,6 +325,26 @@ ADD_ALPHA_FUNC(r8g8b8_to_b8g8r8a8, 0, 1, 2, 2, 1, 0, 3)
ADD_ALPHA_FUNC(r8g8b8_to_a8r8g8b8, 0, 1, 2, 1, 2, 3, 0)
ADD_ALPHA_FUNC(r8g8b8_to_a8b8g8r8, 0, 1, 2, 3, 2, 1, 0)
#define SWAP_FUNC(name, R, G, B, A) \
static void \
name (guchar *dest, \
const guchar *src, \
gsize n) \
{ \
for (; n > 0; n--) \
{ \
dest[0] = src[R]; \
dest[1] = src[G]; \
dest[2] = src[B]; \
dest[3] = src[A]; \
dest += 4; \
src += 4; \
} \
}
SWAP_FUNC(r8g8b8a8_to_b8g8r8a8, 2, 1, 0, 3)
SWAP_FUNC(b8g8r8a8_to_r8g8b8a8, 2, 1, 0, 3)
#define MIPMAP_FUNC(SumType, DataType, n_units) \
static void \
gdk_mipmap_ ## DataType ## _ ## n_units ## _nearest (guchar *dest, \
@ -2032,6 +2052,12 @@ get_fast_conversion_func (GdkMemoryFormat dest_format,
return r8g8b8a8_to_a8r8g8b8_premultiplied;
else if (src_format == GDK_MEMORY_B8G8R8A8 && dest_format == GDK_MEMORY_A8R8G8B8_PREMULTIPLIED)
return r8g8b8a8_to_a8b8g8r8_premultiplied;
else if ((src_format == GDK_MEMORY_B8G8R8A8 && dest_format == GDK_MEMORY_R8G8B8A8) ||
(src_format == GDK_MEMORY_B8G8R8A8_PREMULTIPLIED && dest_format == GDK_MEMORY_R8G8B8A8_PREMULTIPLIED))
return b8g8r8a8_to_r8g8b8a8;
else if ((src_format == GDK_MEMORY_R8G8B8A8 && dest_format == GDK_MEMORY_B8G8R8A8) ||
(src_format == GDK_MEMORY_R8G8B8A8_PREMULTIPLIED && dest_format == GDK_MEMORY_B8G8R8A8_PREMULTIPLIED))
return r8g8b8a8_to_b8g8r8a8;
else if (src_format == GDK_MEMORY_R8G8B8 && dest_format == GDK_MEMORY_R8G8B8A8_PREMULTIPLIED)
return r8g8b8_to_r8g8b8a8;
else if (src_format == GDK_MEMORY_B8G8R8 && dest_format == GDK_MEMORY_R8G8B8A8_PREMULTIPLIED)