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23044a1047
mutter/cogl/cogl-bitmap-packing.h
Neil Roberts eb7ef457cb Add support for RG textures 
This adds COGL_PIXEL_FORMAT_RG_88 and COGL_TEXTURE_COMPONENTS_RG in
order to support two-component textures. The RG components for a
texture is only supported if COGL_FEATURE_ID_TEXTURE_RG is advertised.
This is only available on GL 3, GL 2 with the GL_ARB_texture_rg
extension or GLES with the GL_EXT_texture_rg extension. The RG pixel
format is always supported for images because Cogl can easily do the
conversion if an application uses this format to upload to a texture
with a different format.

If an application tries to create an RG texture when the feature isn't
supported then it will raise an error when the texture is allocated.

https://bugzilla.gnome.org/show_bug.cgi?id=712830

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 568677ab3bcb62ababad1623be0d6b9b117d0a26)

Conflicts:
	cogl/cogl-bitmap-packing.h
	cogl/cogl-types.h
	cogl/driver/gl/gl/cogl-driver-gl.c
	tests/conform/test-read-texture-formats.c
	tests/conform/test-write-texture-formats.c
2014-01-20 14:40:45 +00:00

761 lines
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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2012 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
*/
/* This file is included multiple times with different definitions for
the component_type type (either uint8_t or uint16_t). The code ends
up exactly the same for both but we only want to end up hitting the
16-bit path when one of the types in the conversion is > 8 bits per
component. */
/* Unpacking to RGBA */
#define UNPACK_1(b) ((b) * ((1 << (sizeof (component_type) * 8)) - 1))
#define UNPACK_2(b) (((b) * ((1 << (sizeof (component_type) * 8)) - 1) + \
1) / 3)
#define UNPACK_4(b) (((b) * ((1 << (sizeof (component_type) * 8)) - 1) + \
7) / 15)
#define UNPACK_5(b) (((b) * ((1 << (sizeof (component_type) * 8)) - 1) + \
15) / 31)
#define UNPACK_6(b) (((b) * ((1 << (sizeof (component_type) * 8)) - 1) + \
31) / 63)
#define UNPACK_10(b) (((b) * ((1 << (sizeof (component_type) * 8)) - 1) + \
511) / 1023)
inline static void
G_PASTE (_cogl_unpack_a_8_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = 0;
dst[1] = 0;
dst[2] = 0;
dst[3] = UNPACK_BYTE (*src);
dst += 4;
src++;
}
}
inline static void
G_PASTE (_cogl_unpack_g_8_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
/* FIXME: I'm not sure if this is right. It looks like Nvidia and
Mesa handle luminance textures differently. Maybe we should
consider just removing luminance textures for Cogl 2.0 because
they have been removed in GL 3.0 */
while (width-- > 0)
{
component_type v = UNPACK_BYTE (src[0]);
dst[0] = v;
dst[1] = v;
dst[2] = v;
dst[3] = UNPACK_BYTE (255);
dst += 4;
src++;
}
}
inline static void
G_PASTE (_cogl_unpack_rg_88_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = UNPACK_BYTE (src[0]);
dst[1] = UNPACK_BYTE (src[1]);
dst[2] = 0;
dst[3] = UNPACK_BYTE (255);
dst += 4;
src += 2;
}
}
inline static void
G_PASTE (_cogl_unpack_rgb_888_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = UNPACK_BYTE (src[0]);
dst[1] = UNPACK_BYTE (src[1]);
dst[2] = UNPACK_BYTE (src[2]);
dst[3] = UNPACK_BYTE (255);
dst += 4;
src += 3;
}
}
inline static void
G_PASTE (_cogl_unpack_bgr_888_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = UNPACK_BYTE (src[2]);
dst[1] = UNPACK_BYTE (src[1]);
dst[2] = UNPACK_BYTE (src[0]);
dst[3] = UNPACK_BYTE (255);
dst += 4;
src += 3;
}
}
inline static void
G_PASTE (_cogl_unpack_bgra_8888_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = UNPACK_BYTE (src[2]);
dst[1] = UNPACK_BYTE (src[1]);
dst[2] = UNPACK_BYTE (src[0]);
dst[3] = UNPACK_BYTE (src[3]);
dst += 4;
src += 4;
}
}
inline static void
G_PASTE (_cogl_unpack_argb_8888_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = UNPACK_BYTE (src[1]);
dst[1] = UNPACK_BYTE (src[2]);
dst[2] = UNPACK_BYTE (src[3]);
dst[3] = UNPACK_BYTE (src[0]);
dst += 4;
src += 4;
}
}
inline static void
G_PASTE (_cogl_unpack_abgr_8888_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = UNPACK_BYTE (src[3]);
dst[1] = UNPACK_BYTE (src[2]);
dst[2] = UNPACK_BYTE (src[1]);
dst[3] = UNPACK_BYTE (src[0]);
dst += 4;
src += 4;
}
}
inline static void
G_PASTE (_cogl_unpack_rgba_8888_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
dst[0] = UNPACK_BYTE (src[0]);
dst[1] = UNPACK_BYTE (src[1]);
dst[2] = UNPACK_BYTE (src[2]);
dst[3] = UNPACK_BYTE (src[3]);
dst += 4;
src += 4;
}
}
inline static void
G_PASTE (_cogl_unpack_rgb_565_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
uint16_t v = *(const uint16_t *) src;
dst[0] = UNPACK_5 (v >> 11);
dst[1] = UNPACK_6 ((v >> 5) & 63);
dst[2] = UNPACK_5 (v & 31);
dst[3] = UNPACK_BYTE (255);
dst += 4;
src += 2;
}
}
inline static void
G_PASTE (_cogl_unpack_rgba_4444_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
uint16_t v = *(const uint16_t *) src;
dst[0] = UNPACK_4 (v >> 12);
dst[1] = UNPACK_4 ((v >> 8) & 15);
dst[2] = UNPACK_4 ((v >> 4) & 15);
dst[3] = UNPACK_4 (v & 15);
dst += 4;
src += 2;
}
}
inline static void
G_PASTE (_cogl_unpack_rgba_5551_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
uint16_t v = *(const uint16_t *) src;
dst[0] = UNPACK_5 (v >> 11);
dst[1] = UNPACK_5 ((v >> 6) & 31);
dst[2] = UNPACK_5 ((v >> 1) & 31);
dst[3] = UNPACK_1 (v & 1);
dst += 4;
src += 2;
}
}
inline static void
G_PASTE (_cogl_unpack_rgba_1010102_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
uint32_t v = *(const uint32_t *) src;
dst[0] = UNPACK_10 (v >> 22);
dst[1] = UNPACK_10 ((v >> 12) & 1023);
dst[2] = UNPACK_10 ((v >> 2) & 1023);
dst[3] = UNPACK_2 (v & 3);
dst += 4;
src += 2;
}
}
inline static void
G_PASTE (_cogl_unpack_bgra_1010102_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
uint32_t v = *(const uint32_t *) src;
dst[2] = UNPACK_10 (v >> 22);
dst[1] = UNPACK_10 ((v >> 12) & 1023);
dst[0] = UNPACK_10 ((v >> 2) & 1023);
dst[3] = UNPACK_2 (v & 3);
dst += 4;
src += 2;
}
}
inline static void
G_PASTE (_cogl_unpack_argb_2101010_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
uint32_t v = *(const uint32_t *) src;
dst[3] = UNPACK_2 (v >> 30);
dst[0] = UNPACK_10 ((v >> 20) & 1023);
dst[1] = UNPACK_10 ((v >> 10) & 1023);
dst[2] = UNPACK_10 (v & 1023);
dst += 4;
src += 2;
}
}
inline static void
G_PASTE (_cogl_unpack_abgr_2101010_, component_size) (const uint8_t *src,
component_type *dst,
int width)
{
while (width-- > 0)
{
uint32_t v = *(const uint32_t *) src;
dst[3] = UNPACK_2 (v >> 30);
dst[2] = UNPACK_10 ((v >> 20) & 1023);
dst[1] = UNPACK_10 ((v >> 10) & 1023);
dst[0] = UNPACK_10 (v & 1023);
dst += 4;
src += 2;
}
}
#undef UNPACK_1
#undef UNPACK_2
#undef UNPACK_4
#undef UNPACK_5
#undef UNPACK_6
#undef UNPACK_10
inline static void
G_PASTE (_cogl_unpack_, component_size) (CoglPixelFormat format,
const uint8_t *src,
component_type *dst,
int width)
{
switch (format)
{
case COGL_PIXEL_FORMAT_A_8:
G_PASTE (_cogl_unpack_a_8_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_G_8:
G_PASTE (_cogl_unpack_g_8_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RG_88:
G_PASTE (_cogl_unpack_rg_88_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGB_888:
G_PASTE (_cogl_unpack_rgb_888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_BGR_888:
G_PASTE (_cogl_unpack_bgr_888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_8888:
case COGL_PIXEL_FORMAT_RGBA_8888_PRE:
G_PASTE (_cogl_unpack_rgba_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_BGRA_8888:
case COGL_PIXEL_FORMAT_BGRA_8888_PRE:
G_PASTE (_cogl_unpack_bgra_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ARGB_8888:
case COGL_PIXEL_FORMAT_ARGB_8888_PRE:
G_PASTE (_cogl_unpack_argb_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ABGR_8888:
case COGL_PIXEL_FORMAT_ABGR_8888_PRE:
G_PASTE (_cogl_unpack_abgr_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGB_565:
G_PASTE (_cogl_unpack_rgb_565_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_4444:
case COGL_PIXEL_FORMAT_RGBA_4444_PRE:
G_PASTE (_cogl_unpack_rgba_4444_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_5551:
case COGL_PIXEL_FORMAT_RGBA_5551_PRE:
G_PASTE (_cogl_unpack_rgba_5551_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_1010102:
case COGL_PIXEL_FORMAT_RGBA_1010102_PRE:
G_PASTE (_cogl_unpack_rgba_1010102_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_BGRA_1010102:
case COGL_PIXEL_FORMAT_BGRA_1010102_PRE:
G_PASTE (_cogl_unpack_bgra_1010102_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ARGB_2101010:
case COGL_PIXEL_FORMAT_ARGB_2101010_PRE:
G_PASTE (_cogl_unpack_argb_2101010_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ABGR_2101010:
case COGL_PIXEL_FORMAT_ABGR_2101010_PRE:
G_PASTE (_cogl_unpack_abgr_2101010_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_DEPTH_16:
case COGL_PIXEL_FORMAT_DEPTH_32:
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
case COGL_PIXEL_FORMAT_ANY:
case COGL_PIXEL_FORMAT_YUV:
g_assert_not_reached ();
}
}
/* Packing from RGBA */
/* Pack and round to nearest */
#define PACK_SIZE(b, max) \
(((b) * (max) + (1 << (sizeof (component_type) * 8 - 1)) - 1) / \
((1 << (sizeof (component_type) * 8)) - 1))
#define PACK_1(b) PACK_SIZE (b, 1)
#define PACK_2(b) PACK_SIZE (b, 3)
#define PACK_4(b) PACK_SIZE (b, 15)
#define PACK_5(b) PACK_SIZE (b, 31)
#define PACK_6(b) PACK_SIZE (b, 63)
#define PACK_10(b) PACK_SIZE (b, 1023)
inline static void
G_PASTE (_cogl_pack_a_8_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
*dst = PACK_BYTE (src[3]);
src += 4;
dst++;
}
}
inline static void
G_PASTE (_cogl_pack_g_8_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
/* FIXME: I'm not sure if this is right. It looks like Nvidia and
Mesa handle luminance textures differently. Maybe we should
consider just removing luminance textures for Cogl 2.0 because
they have been removed in GL 3.0 */
while (width-- > 0)
{
component_type v = (src[0] + src[1] + src[2]) / 3;
*dst = PACK_BYTE (v);
src += 4;
dst++;
}
}
inline static void
G_PASTE (_cogl_pack_rg_88_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
dst[0] = PACK_BYTE (src[0]);
dst[1] = PACK_BYTE (src[1]);
src += 4;
dst += 2;
}
}
inline static void
G_PASTE (_cogl_pack_rgb_888_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
dst[0] = PACK_BYTE (src[0]);
dst[1] = PACK_BYTE (src[1]);
dst[2] = PACK_BYTE (src[2]);
src += 4;
dst += 3;
}
}
inline static void
G_PASTE (_cogl_pack_bgr_888_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
dst[2] = PACK_BYTE (src[0]);
dst[1] = PACK_BYTE (src[1]);
dst[0] = PACK_BYTE (src[2]);
src += 4;
dst += 3;
}
}
inline static void
G_PASTE (_cogl_pack_bgra_8888_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
dst[2] = PACK_BYTE (src[0]);
dst[1] = PACK_BYTE (src[1]);
dst[0] = PACK_BYTE (src[2]);
dst[3] = PACK_BYTE (src[3]);
src += 4;
dst += 4;
}
}
inline static void
G_PASTE (_cogl_pack_argb_8888_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
dst[1] = PACK_BYTE (src[0]);
dst[2] = PACK_BYTE (src[1]);
dst[3] = PACK_BYTE (src[2]);
dst[0] = PACK_BYTE (src[3]);
src += 4;
dst += 4;
}
}
inline static void
G_PASTE (_cogl_pack_abgr_8888_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
dst[3] = PACK_BYTE (src[0]);
dst[2] = PACK_BYTE (src[1]);
dst[1] = PACK_BYTE (src[2]);
dst[0] = PACK_BYTE (src[3]);
src += 4;
dst += 4;
}
}
inline static void
G_PASTE (_cogl_pack_rgba_8888_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
dst[0] = PACK_BYTE (src[0]);
dst[1] = PACK_BYTE (src[1]);
dst[2] = PACK_BYTE (src[2]);
dst[3] = PACK_BYTE (src[3]);
src += 4;
dst += 4;
}
}
inline static void
G_PASTE (_cogl_pack_rgb_565_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
uint16_t *v = (uint16_t *) dst;
*v = ((PACK_5 (src[0]) << 11) |
(PACK_6 (src[1]) << 5) |
PACK_5 (src[2]));
src += 4;
dst += 2;
}
}
inline static void
G_PASTE (_cogl_pack_rgba_4444_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
uint16_t *v = (uint16_t *) dst;
*v = ((PACK_4 (src[0]) << 12) |
(PACK_4 (src[1]) << 8) |
(PACK_4 (src[2]) << 4) |
PACK_4 (src[3]));
src += 4;
dst += 2;
}
}
inline static void
G_PASTE (_cogl_pack_rgba_5551_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
uint16_t *v = (uint16_t *) dst;
*v = ((PACK_5 (src[0]) << 11) |
(PACK_5 (src[1]) << 6) |
(PACK_5 (src[2]) << 1) |
PACK_1 (src[3]));
src += 4;
dst += 2;
}
}
inline static void
G_PASTE (_cogl_pack_rgba_1010102_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
uint32_t *v = (uint32_t *) dst;
*v = ((PACK_10 (src[0]) << 22) |
(PACK_10 (src[1]) << 12) |
(PACK_10 (src[2]) << 2) |
PACK_2 (src[3]));
src += 4;
dst += 4;
}
}
inline static void
G_PASTE (_cogl_pack_bgra_1010102_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
uint32_t *v = (uint32_t *) dst;
*v = ((PACK_10 (src[2]) << 22) |
(PACK_10 (src[1]) << 12) |
(PACK_10 (src[0]) << 2) |
PACK_2 (src[3]));
src += 4;
dst += 4;
}
}
inline static void
G_PASTE (_cogl_pack_argb_2101010_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
uint32_t *v = (uint32_t *) dst;
*v = ((PACK_2 (src[3]) << 30) |
(PACK_10 (src[0]) << 20) |
(PACK_10 (src[1]) << 10) |
PACK_10 (src[2]));
src += 4;
dst += 4;
}
}
inline static void
G_PASTE (_cogl_pack_abgr_2101010_, component_size) (const component_type *src,
uint8_t *dst,
int width)
{
while (width-- > 0)
{
uint32_t *v = (uint32_t *) dst;
*v = ((PACK_2 (src[3]) << 30) |
(PACK_10 (src[2]) << 20) |
(PACK_10 (src[1]) << 10) |
PACK_10 (src[0]));
src += 4;
dst += 4;
}
}
#undef PACK_SIZE
#undef PACK_1
#undef PACK_2
#undef PACK_4
#undef PACK_5
#undef PACK_6
#undef PACK_10
inline static void
G_PASTE (_cogl_pack_, component_size) (CoglPixelFormat format,
const component_type *src,
uint8_t *dst,
int width)
{
switch (format)
{
case COGL_PIXEL_FORMAT_A_8:
G_PASTE (_cogl_pack_a_8_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_G_8:
G_PASTE (_cogl_pack_g_8_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RG_88:
G_PASTE (_cogl_pack_rg_88_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGB_888:
G_PASTE (_cogl_pack_rgb_888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_BGR_888:
G_PASTE (_cogl_pack_bgr_888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_8888:
case COGL_PIXEL_FORMAT_RGBA_8888_PRE:
G_PASTE (_cogl_pack_rgba_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_BGRA_8888:
case COGL_PIXEL_FORMAT_BGRA_8888_PRE:
G_PASTE (_cogl_pack_bgra_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ARGB_8888:
case COGL_PIXEL_FORMAT_ARGB_8888_PRE:
G_PASTE (_cogl_pack_argb_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ABGR_8888:
case COGL_PIXEL_FORMAT_ABGR_8888_PRE:
G_PASTE (_cogl_pack_abgr_8888_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGB_565:
G_PASTE (_cogl_pack_rgb_565_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_4444:
case COGL_PIXEL_FORMAT_RGBA_4444_PRE:
G_PASTE (_cogl_pack_rgba_4444_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_5551:
case COGL_PIXEL_FORMAT_RGBA_5551_PRE:
G_PASTE (_cogl_pack_rgba_5551_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_RGBA_1010102:
case COGL_PIXEL_FORMAT_RGBA_1010102_PRE:
G_PASTE (_cogl_pack_rgba_1010102_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_BGRA_1010102:
case COGL_PIXEL_FORMAT_BGRA_1010102_PRE:
G_PASTE (_cogl_pack_bgra_1010102_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ARGB_2101010:
case COGL_PIXEL_FORMAT_ARGB_2101010_PRE:
G_PASTE (_cogl_pack_argb_2101010_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_ABGR_2101010:
case COGL_PIXEL_FORMAT_ABGR_2101010_PRE:
G_PASTE (_cogl_pack_abgr_2101010_, component_size) (src, dst, width);
break;
case COGL_PIXEL_FORMAT_DEPTH_16:
case COGL_PIXEL_FORMAT_DEPTH_32:
case COGL_PIXEL_FORMAT_DEPTH_24_STENCIL_8:
case COGL_PIXEL_FORMAT_ANY:
case COGL_PIXEL_FORMAT_YUV:
g_assert_not_reached ();
}
}
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