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1759d27da9
gtk2/gdk/gdkmemorytexture.c
Benjamin Otte 1759d27da9 memorytexture: Add support for HDR formats 
Also sanitize the input bytes so the strides match alignment
requirements of the data types.
2021-09-12 05:54:37 +02:00

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/*
* Copyright © 2018 Benjamin Otte
*
* 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 2.1 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/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gdkmemorytextureprivate.h"
#include "gsk/ngl/fp16private.h"
/**
* GdkMemoryTexture:
*
* A `GdkTexture` representing image data in memory.
*/
struct _GdkMemoryTexture
{
GdkTexture parent_instance;
GdkMemoryFormat format;
GBytes *bytes;
gsize stride;
};
struct _GdkMemoryTextureClass
{
GdkTextureClass parent_class;
};
G_DEFINE_TYPE (GdkMemoryTexture, gdk_memory_texture, GDK_TYPE_TEXTURE)
gsize
gdk_memory_format_bytes_per_pixel (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
return 3;
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:
return 4;
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
return 6;
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
return 8;
case GDK_MEMORY_R32G32B32_FLOAT:
return 12;
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
return 16;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return 4;
}
}
static gsize
gdk_memory_format_alignment (GdkMemoryFormat format)
{
switch (format)
{
case GDK_MEMORY_R8G8B8:
case GDK_MEMORY_B8G8R8:
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:
return G_ALIGNOF (guchar);
case GDK_MEMORY_R16G16B16:
case GDK_MEMORY_R16G16B16_FLOAT:
return G_ALIGNOF (guint16);
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
return G_ALIGNOF (guint16);
case GDK_MEMORY_R32G32B32_FLOAT:
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
return G_ALIGNOF (float);
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached ();
return G_ALIGNOF (double);
}
}
static void
gdk_memory_texture_dispose (GObject *object)
{
GdkMemoryTexture *self = GDK_MEMORY_TEXTURE (object);
g_clear_pointer (&self->bytes, g_bytes_unref);
G_OBJECT_CLASS (gdk_memory_texture_parent_class)->dispose (object);
}
static GdkTexture *
gdk_memory_texture_download_texture (GdkTexture *texture)
{
return g_object_ref (texture);
}
static void
gdk_memory_texture_download (GdkTexture *texture,
guchar *data,
gsize stride)
{
GdkMemoryTexture *self = GDK_MEMORY_TEXTURE (texture);
gdk_memory_convert (data, stride,
GDK_MEMORY_CONVERT_DOWNLOAD,
(guchar *) g_bytes_get_data (self->bytes, NULL),
self->stride,
self->format,
gdk_texture_get_width (texture),
gdk_texture_get_height (texture));
}
static void
gdk_memory_texture_download_float (GdkTexture *texture,
float *data,
gsize stride)
{
GdkMemoryTexture *self = GDK_MEMORY_TEXTURE (texture);
gdk_memory_convert_to_float (data, stride,
(guchar *) g_bytes_get_data (self->bytes, NULL),
self->stride,
self->format,
gdk_texture_get_width (texture),
gdk_texture_get_height (texture));
}
static void
gdk_memory_texture_class_init (GdkMemoryTextureClass *klass)
{
GdkTextureClass *texture_class = GDK_TEXTURE_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
texture_class->download_texture = gdk_memory_texture_download_texture;
texture_class->download = gdk_memory_texture_download;
texture_class->download_float = gdk_memory_texture_download_float;
gobject_class->dispose = gdk_memory_texture_dispose;
}
static void
gdk_memory_texture_init (GdkMemoryTexture *self)
{
}
static GBytes *
gdk_memory_sanitize (GBytes *bytes,
int width,
int height,
GdkMemoryFormat format,
gsize stride,
gsize *out_stride)
{
gsize align, size, copy_stride, bpp;
const guchar *data;
guchar *copy;
int y;
data = g_bytes_get_data (bytes, &size);
align = gdk_memory_format_alignment (format);
if (GPOINTER_TO_SIZE (data) % align == 0 &&
stride % align == 0)
{
*out_stride = stride;
return g_bytes_ref (bytes);
}
bpp = gdk_memory_format_bytes_per_pixel (format);
copy_stride = bpp * width;
/* align to multiples of 4, just to be sure */
copy_stride = (copy_stride + 3) & ~3;
copy = g_malloc (copy_stride * height);
for (y = 0; y < height; y++)
memcpy (copy + y * copy_stride, data + y * stride, bpp * width);
*out_stride = copy_stride;
return g_bytes_new_take (copy, copy_stride * height);
}
/**
* gdk_memory_texture_new:
* @width: the width of the texture
* @height: the height of the texture
* @format: the format of the data
* @bytes: the `GBytes` containing the pixel data
* @stride: rowstride for the data
*
* Creates a new texture for a blob of image data.
*
* The `GBytes` must contain @stride x @height pixels
* in the given format.
*
* Returns: A newly-created `GdkTexture`
*/
GdkTexture *
gdk_memory_texture_new (int width,
int height,
GdkMemoryFormat format,
GBytes *bytes,
gsize stride)
{
GdkMemoryTexture *self;
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
g_return_val_if_fail (bytes != NULL, NULL);
g_return_val_if_fail (stride >= width * gdk_memory_format_bytes_per_pixel (format), NULL);
bytes = gdk_memory_sanitize (bytes, width, height, format, stride, &stride);
self = g_object_new (GDK_TYPE_MEMORY_TEXTURE,
"width", width,
"height", height,
NULL);
self->format = format;
self->bytes = bytes;
self->stride = stride;
return GDK_TEXTURE (self);
}
GdkMemoryFormat
gdk_memory_texture_get_format (GdkMemoryTexture *self)
{
return self->format;
}
const guchar *
gdk_memory_texture_get_data (GdkMemoryTexture *self)
{
return g_bytes_get_data (self->bytes, NULL);
}
gsize
gdk_memory_texture_get_stride (GdkMemoryTexture *self)
{
return self->stride;
}
static void
convert_memcpy (guchar *dest_data,
gsize dest_stride,
const guchar *src_data,
gsize src_stride,
gsize width,
gsize height)
{
gsize y;
for (y = 0; y < height; y++)
memcpy (dest_data + y * dest_stride, src_data + y * src_stride, 4 * width);
}
#define SWIZZLE(A,R,G,B) \
static void \
convert_swizzle ## A ## R ## G ## B (guchar *dest_data, \
gsize dest_stride, \
const guchar *src_data, \
gsize src_stride, \
gsize width, \
gsize height) \
{ \
gsize x, y; \
\
for (y = 0; y < height; y++) \
{ \
for (x = 0; x < width; x++) \
{ \
dest_data[4 * x + A] = src_data[4 * x + 0]; \
dest_data[4 * x + R] = src_data[4 * x + 1]; \
dest_data[4 * x + G] = src_data[4 * x + 2]; \
dest_data[4 * x + B] = src_data[4 * x + 3]; \
} \
\
dest_data += dest_stride; \
src_data += src_stride; \
} \
}
SWIZZLE(3,2,1,0)
SWIZZLE(2,1,0,3)
SWIZZLE(3,0,1,2)
SWIZZLE(1,2,3,0)
#define SWIZZLE_OPAQUE(A,R,G,B) \
static void \
convert_swizzle_opaque_## A ## R ## G ## B (guchar *dest_data, \
gsize dest_stride, \
const guchar *src_data, \
gsize src_stride, \
gsize width, \
gsize height) \
{ \
gsize x, y; \
\
for (y = 0; y < height; y++) \
{ \
for (x = 0; x < width; x++) \
{ \
dest_data[4 * x + A] = 0xFF; \
dest_data[4 * x + R] = src_data[3 * x + 0]; \
dest_data[4 * x + G] = src_data[3 * x + 1]; \
dest_data[4 * x + B] = src_data[3 * x + 2]; \
} \
\
dest_data += dest_stride; \
src_data += src_stride; \
} \
}
SWIZZLE_OPAQUE(3,2,1,0)
SWIZZLE_OPAQUE(3,0,1,2)
SWIZZLE_OPAQUE(0,1,2,3)
SWIZZLE_OPAQUE(0,3,2,1)
#define PREMULTIPLY(d,c,a) G_STMT_START { guint t = c * a + 0x80; d = ((t >> 8) + t) >> 8; } G_STMT_END
#define SWIZZLE_PREMULTIPLY(A,R,G,B, A2,R2,G2,B2) \
static void \
convert_swizzle_premultiply_ ## A ## R ## G ## B ## _ ## A2 ## R2 ## G2 ## B2 \
(guchar *dest_data, \
gsize dest_stride, \
const guchar *src_data, \
gsize src_stride, \
gsize width, \
gsize height) \
{ \
gsize x, y; \
\
for (y = 0; y < height; y++) \
{ \
for (x = 0; x < width; x++) \
{ \
dest_data[4 * x + A] = src_data[4 * x + A2]; \
PREMULTIPLY(dest_data[4 * x + R], src_data[4 * x + R2], src_data[4 * x + A2]); \
PREMULTIPLY(dest_data[4 * x + G], src_data[4 * x + G2], src_data[4 * x + A2]); \
PREMULTIPLY(dest_data[4 * x + B], src_data[4 * x + B2], src_data[4 * x + A2]); \
} \
\
dest_data += dest_stride; \
src_data += src_stride; \
} \
}
SWIZZLE_PREMULTIPLY (3,2,1,0, 3,2,1,0)
SWIZZLE_PREMULTIPLY (0,1,2,3, 3,2,1,0)
SWIZZLE_PREMULTIPLY (3,2,1,0, 0,1,2,3)
SWIZZLE_PREMULTIPLY (0,1,2,3, 0,1,2,3)
SWIZZLE_PREMULTIPLY (3,2,1,0, 3,0,1,2)
SWIZZLE_PREMULTIPLY (0,1,2,3, 3,0,1,2)
SWIZZLE_PREMULTIPLY (3,2,1,0, 0,3,2,1)
SWIZZLE_PREMULTIPLY (0,1,2,3, 0,3,2,1)
SWIZZLE_PREMULTIPLY (3,0,1,2, 3,2,1,0)
SWIZZLE_PREMULTIPLY (3,0,1,2, 0,1,2,3)
SWIZZLE_PREMULTIPLY (3,0,1,2, 3,0,1,2)
SWIZZLE_PREMULTIPLY (3,0,1,2, 0,3,2,1)
#define CONVERT_FUNC(name,suffix,R,G,B,A,step) \
static void \
convert_ ## name ## _to_ ## suffix (guchar *dest_data, \
gsize dest_stride, \
const guchar *src_data, \
gsize src_stride, \
gsize width, \
gsize height) \
{ \
gsize x, y; \
\
for (y = 0; y < height; y++) \
{ \
for (x = 0; x < width; x++) \
{ \
guchar conv[4]; \
convert_pixel_ ## name (conv, src_data + step * x); \
dest_data[4 * x + R] = conv[0]; \
dest_data[4 * x + G] = conv[1]; \
dest_data[4 * x + B] = conv[2]; \
dest_data[4 * x + A] = conv[3]; \
} \
\
dest_data += dest_stride; \
src_data += src_stride; \
} \
}
#define CONVERT_FUNCS(name,step) \
CONVERT_FUNC(name, download_le, 2, 1, 0, 3, step) \
CONVERT_FUNC(name, download_be, 1, 2, 3, 0, step) \
CONVERT_FUNC(name, gles_rgba, 0, 1, 2, 3, step) \
static inline void
convert_pixel_rgb16 (guchar *dest_data, const guchar *src_data)
{
const guint16 *src = (const guint16 *) src_data;
dest_data[0] = (guchar)(src[0] >> 8);
dest_data[1] = (guchar)(src[1] >> 8);
dest_data[2] = (guchar)(src[2] >> 8);
dest_data[3] = 0xFF;
}
CONVERT_FUNCS(rgb16, 3 * sizeof (guint16))
static inline void
convert_pixel_rgba16 (guchar *dest_data, const guchar *src_data)
{
const guint16 *src = (const guint16 *) src_data;
dest_data[0] = (guchar)(src[0] >> 8);
dest_data[1] = (guchar)(src[1] >> 8);
dest_data[2] = (guchar)(src[2] >> 8);
dest_data[3] = (guchar)(src[3] >> 8);
}
CONVERT_FUNCS(rgba16, 4 * sizeof (guint16))
static inline void
convert_pixel_rgb16f (guchar *dest_data, const guchar *src_data)
{
float src[4];
guint16 tmp[4];
memcpy(tmp, src_data, sizeof(guint16) * 3);
half_to_float4(tmp, src);
dest_data[0] = CLAMP (src[0] * 256.f, 0.f, 255.f);
dest_data[1] = CLAMP (src[1] * 256.f, 0.f, 255.f);
dest_data[2] = CLAMP (src[2] * 256.f, 0.f, 255.f);
dest_data[3] = 0xFF;
}
CONVERT_FUNCS(rgb16f, 3 * sizeof (guint16))
static inline void
convert_pixel_rgba16f (guchar *dest_data, const guchar *src_data)
{
float src[4];
half_to_float4((const guint16 *) src_data, src);
dest_data[0] = CLAMP (src[0] * 256.f, 0.f, 255.f);
dest_data[1] = CLAMP (src[1] * 256.f, 0.f, 255.f);
dest_data[2] = CLAMP (src[2] * 256.f, 0.f, 255.f);
dest_data[3] = CLAMP (src[3] * 256.f, 0.f, 255.f);
}
CONVERT_FUNCS(rgba16f, 4 * sizeof (guint16))
static inline void
convert_pixel_rgb32f (guchar *dest_data, const guchar *src_data)
{
float *src = (float *) src_data;
dest_data[0] = CLAMP (src[0] * 256.f, 0.f, 255.f);
dest_data[1] = CLAMP (src[1] * 256.f, 0.f, 255.f);
dest_data[2] = CLAMP (src[2] * 256.f, 0.f, 255.f);
dest_data[3] = 0xFF;
}
CONVERT_FUNCS(rgb32f, 3 * sizeof (float))
static inline void
convert_pixel_rgba32f (guchar *dest_data, const guchar *src_data)
{
float *src = (float *) src_data;
dest_data[0] = CLAMP (src[0] * 256.f, 0.f, 255.f);
dest_data[1] = CLAMP (src[1] * 256.f, 0.f, 255.f);
dest_data[2] = CLAMP (src[2] * 256.f, 0.f, 255.f);
dest_data[3] = CLAMP (src[3] * 256.f, 0.f, 255.f);
}
CONVERT_FUNCS(rgba32f, 4 * sizeof (float))
typedef void (* ConversionFunc) (guchar *dest_data,
gsize dest_stride,
const guchar *src_data,
gsize src_stride,
gsize width,
gsize height);
static ConversionFunc converters[GDK_MEMORY_N_FORMATS][GDK_MEMORY_N_CONVERSIONS] =
{
{ convert_memcpy, convert_swizzle3210, convert_swizzle2103 },
{ convert_swizzle3210, convert_memcpy, convert_swizzle3012 },
{ convert_swizzle2103, convert_swizzle1230, convert_memcpy },
{ convert_swizzle_premultiply_3210_3210, convert_swizzle_premultiply_0123_3210, convert_swizzle_premultiply_3012_3210, },
{ convert_swizzle_premultiply_3210_0123, convert_swizzle_premultiply_0123_0123, convert_swizzle_premultiply_3012_0123 },
{ convert_swizzle_premultiply_3210_3012, convert_swizzle_premultiply_0123_3012, convert_swizzle_premultiply_3012_3012 },
{ convert_swizzle_premultiply_3210_0321, convert_swizzle_premultiply_0123_0321, convert_swizzle_premultiply_3012_0321 },
{ convert_swizzle_opaque_3210, convert_swizzle_opaque_0123, convert_swizzle_opaque_3012 },
{ convert_swizzle_opaque_3012, convert_swizzle_opaque_0321, convert_swizzle_opaque_3210 },
{ convert_rgb16_to_download_le, convert_rgb16_to_download_be, convert_rgb16_to_gles_rgba },
{ convert_rgba16_to_download_le, convert_rgba16_to_download_be, convert_rgba16_to_gles_rgba },
{ convert_rgb16f_to_download_le, convert_rgb16f_to_download_be, convert_rgb16f_to_gles_rgba },
{ convert_rgba16f_to_download_le, convert_rgba16f_to_download_be, convert_rgba16f_to_gles_rgba },
{ convert_rgb32f_to_download_le, convert_rgb32f_to_download_be, convert_rgb32f_to_gles_rgba },
{ convert_rgba32f_to_download_le, convert_rgba32f_to_download_be, convert_rgba32f_to_gles_rgba }
};
void
gdk_memory_convert (guchar *dest_data,
gsize dest_stride,
GdkMemoryConversion dest_format,
const guchar *src_data,
gsize src_stride,
GdkMemoryFormat src_format,
gsize width,
gsize height)
{
g_assert (dest_format < 3);
g_assert (src_format < GDK_MEMORY_N_FORMATS);
converters[src_format][dest_format] (dest_data, dest_stride, src_data, src_stride, width, height);
}
#define CONVERT_FLOAT(R,G,B,A,premultiply) G_STMT_START {\
for (y = 0; y < height; y++) \
{ \
for (x = 0; x < width; x++) \
{ \
if (A >= 0) \
{ \
dest_data[4 * x + 0] = src_data[4 * x + R] / 255.0f; \
dest_data[4 * x + 1] = src_data[4 * x + G] / 255.0f; \
dest_data[4 * x + 2] = src_data[4 * x + B] / 255.0f; \
dest_data[4 * x + 3] = src_data[4 * x + A] / 255.0f; \
if (premultiply) \
{ \
dest_data[4 * x + 0] *= dest_data[4 * x + 3]; \
dest_data[4 * x + 1] *= dest_data[4 * x + 3]; \
dest_data[4 * x + 2] *= dest_data[4 * x + 3]; \
} \
} \
else \
{ \
dest_data[4 * x + 0] = src_data[3 * x + R] / 255.0f; \
dest_data[4 * x + 1] = src_data[3 * x + G] / 255.0f; \
dest_data[4 * x + 2] = src_data[3 * x + B] / 255.0f; \
dest_data[4 * x + 3] = 1.0; \
} \
} \
\
dest_data += dest_stride; \
src_data += src_stride; \
} \
}G_STMT_END
#define CONVERT_FLOAT_PIXEL(func,step) G_STMT_START{\
for (y = 0; y < height; y++) \
{ \
for (x = 0; x < width; x++) \
{ \
func (dest_data + 4 * x, src_data + step * x); \
} \
\
dest_data += dest_stride; \
src_data += src_stride; \
} \
}G_STMT_END
static inline void
convert_rgb16_to_float (float *dest, const guchar *src_data)
{
const guint16 *src = (const guint16 *) src_data;
dest[0] = src[0] / 65535.f;
dest[1] = src[1] / 65535.f;
dest[2] = src[2] / 65535.f;
dest[3] = 1.0;
}
static inline void
convert_rgba16_to_float (float *dest, const guchar *src_data)
{
const guint16 *src = (const guint16 *) src_data;
dest[0] = src[0] / 65535.f;
dest[1] = src[1] / 65535.f;
dest[2] = src[2] / 65535.f;
dest[3] = 1.0;
}
static inline void
convert_rgb16f_to_float (float *dest, const guchar *src_data)
{
guint16 tmp[4];
memcpy(tmp, src_data, sizeof(guint16) * 3);
tmp[3] = FP16_ONE;
half_to_float4 (tmp, dest);
}
static inline void
convert_rgba16f_to_float (float *dest, const guchar *src_data)
{
half_to_float4 ((const guint16 *) src_data, dest);
}
static inline void
convert_rgb32f_to_float (float *dest, const guchar *src_data)
{
const float *src = (const float *) src_data;
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dest[3] = 1.0;
}
static inline void
convert_rgba32f_to_float (float *dest, const guchar *src_data)
{
const float *src = (const float *) src_data;
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
dest[3] = src[3];
}
void
gdk_memory_convert_to_float (float *dest_data,
gsize dest_stride,
const guchar *src_data,
gsize src_stride,
GdkMemoryFormat src_format,
gsize width,
gsize height)
{
gsize x, y;
switch (src_format)
{
case GDK_MEMORY_B8G8R8A8_PREMULTIPLIED:
CONVERT_FLOAT (2, 1, 0, 3, FALSE);
break;
case GDK_MEMORY_A8R8G8B8_PREMULTIPLIED:
CONVERT_FLOAT (1, 2, 3, 0, FALSE);
break;
case GDK_MEMORY_R8G8B8A8_PREMULTIPLIED:
CONVERT_FLOAT (0, 1, 2, 3, FALSE);
break;
case GDK_MEMORY_B8G8R8A8:
CONVERT_FLOAT (2, 1, 0, 3, TRUE);
break;
case GDK_MEMORY_A8R8G8B8:
CONVERT_FLOAT (1, 2, 3, 0, TRUE);
break;
case GDK_MEMORY_R8G8B8A8:
CONVERT_FLOAT (0, 1, 2, 3, TRUE);
break;
case GDK_MEMORY_A8B8G8R8:
CONVERT_FLOAT (3, 2, 1, 0, TRUE);
break;
case GDK_MEMORY_R8G8B8:
CONVERT_FLOAT (0, 1, 2, -1, FALSE);
break;
case GDK_MEMORY_B8G8R8:
CONVERT_FLOAT (2, 1, 0, -1, FALSE);
break;
case GDK_MEMORY_R16G16B16:
CONVERT_FLOAT_PIXEL (convert_rgb16_to_float, 3 * sizeof (guint16));
break;
case GDK_MEMORY_R16G16B16A16_PREMULTIPLIED:
CONVERT_FLOAT_PIXEL (convert_rgba16_to_float, 4 * sizeof (guint16));
break;
case GDK_MEMORY_R16G16B16_FLOAT:
CONVERT_FLOAT_PIXEL (convert_rgb16f_to_float, 3 * sizeof (guint16));
break;
case GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED:
CONVERT_FLOAT_PIXEL (convert_rgba16f_to_float, 4 * sizeof (guint16));
break;
case GDK_MEMORY_R32G32B32_FLOAT:
CONVERT_FLOAT_PIXEL (convert_rgb32f_to_float, 3 * sizeof (float));
break;
case GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED:
CONVERT_FLOAT_PIXEL (convert_rgba32f_to_float, 4 * sizeof (float));
break;
case GDK_MEMORY_N_FORMATS:
default:
g_assert_not_reached();
}
}
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