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| author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | 2022-03-03 14:36:57 +0000 |
|---|---|---|
| committer | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | 2022-03-03 16:05:52 +0100 |
| commit | 588076d16676b7231d6c61ab89a8fbc7be9a782d (patch) | |
| tree | 988c34325f90892e2ac05e019b5310138ed07a0a | |
| parent | 3a98b28ab7f9eead21dcfef2d07a6af4fd8c33ce (diff) | |
| download | gtk+-588076d16676b7231d6c61ab89a8fbc7be9a782d.tar.gz | |
gdk: Add a rgb8 → rgba8 conversion macro
This one can be used for both premultiplied and non-premultiplied alpha
formats, since alpha is always 255. It is useful for opaque PNG upload
on both cairo and GL renderers.
| -rw-r--r-- | gdk/gdkmemoryformat.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/gdk/gdkmemoryformat.c b/gdk/gdkmemoryformat.c index adfa26610b..5bd7b228d4 100644 --- a/gdk/gdkmemoryformat.c +++ b/gdk/gdkmemoryformat.c @@ -192,6 +192,28 @@ PREMULTIPLY_FUNC(r8g8b8a8_to_b8g8r8a8_premultiplied, 0, 1, 2, 3, 2, 1, 0, 3) PREMULTIPLY_FUNC(r8g8b8a8_to_a8r8g8b8_premultiplied, 0, 1, 2, 3, 1, 2, 3, 0) PREMULTIPLY_FUNC(r8g8b8a8_to_a8b8g8r8_premultiplied, 0, 1, 2, 3, 3, 2, 1, 0) +#define ADD_ALPHA_FUNC(name, R1, G1, B1, R2, G2, B2, A2) \ +static void \ +name (guchar *dest, \ + const guchar *src, \ + gsize n) \ +{ \ + for (; n > 0; n--) \ + { \ + dest[R2] = src[R1]; \ + dest[G2] = src[G1]; \ + dest[B2] = src[B1]; \ + dest[A2] = 255; \ + dest += 4; \ + src += 3; \ + } \ +} + +ADD_ALPHA_FUNC(r8g8b8_to_r8g8b8a8, 0, 1, 2, 0, 1, 2, 3) +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) + struct _GdkMemoryFormatDescription { GdkMemoryAlpha alpha; @@ -518,6 +540,30 @@ gdk_memory_convert (guchar *dest_data, func = r8g8b8a8_to_a8r8g8b8_premultiplied; else if (src_format == GDK_MEMORY_B8G8R8A8 && dest_format == GDK_MEMORY_A8R8G8B8_PREMULTIPLIED) func = r8g8b8a8_to_a8b8g8r8_premultiplied; + else if (src_format == GDK_MEMORY_R8G8B8 && dest_format == GDK_MEMORY_R8G8B8A8_PREMULTIPLIED) + func = r8g8b8_to_r8g8b8a8; + else if (src_format == GDK_MEMORY_B8G8R8 && dest_format == GDK_MEMORY_R8G8B8A8_PREMULTIPLIED) + func = r8g8b8_to_b8g8r8a8; + else if (src_format == GDK_MEMORY_R8G8B8 && dest_format == GDK_MEMORY_B8G8R8A8_PREMULTIPLIED) + func = r8g8b8_to_b8g8r8a8; + else if (src_format == GDK_MEMORY_B8G8R8 && dest_format == GDK_MEMORY_B8G8R8A8_PREMULTIPLIED) + func = r8g8b8_to_r8g8b8a8; + else if (src_format == GDK_MEMORY_R8G8B8 && dest_format == GDK_MEMORY_A8R8G8B8_PREMULTIPLIED) + func = r8g8b8_to_a8r8g8b8; + else if (src_format == GDK_MEMORY_B8G8R8 && dest_format == GDK_MEMORY_A8R8G8B8_PREMULTIPLIED) + func = r8g8b8_to_a8b8g8r8; + else if (src_format == GDK_MEMORY_R8G8B8 && dest_format == GDK_MEMORY_R8G8B8A8) + func = r8g8b8_to_r8g8b8a8; + else if (src_format == GDK_MEMORY_B8G8R8 && dest_format == GDK_MEMORY_R8G8B8A8) + func = r8g8b8_to_b8g8r8a8; + else if (src_format == GDK_MEMORY_R8G8B8 && dest_format == GDK_MEMORY_B8G8R8A8) + func = r8g8b8_to_b8g8r8a8; + else if (src_format == GDK_MEMORY_B8G8R8 && dest_format == GDK_MEMORY_B8G8R8A8) + func = r8g8b8_to_r8g8b8a8; + else if (src_format == GDK_MEMORY_R8G8B8 && dest_format == GDK_MEMORY_A8R8G8B8) + func = r8g8b8_to_a8r8g8b8; + else if (src_format == GDK_MEMORY_B8G8R8 && dest_format == GDK_MEMORY_A8R8G8B8) + func = r8g8b8_to_a8b8g8r8; if (func != NULL) { |