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Fixes for gdk_memory_texture_new_subtexture

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There were several mistakes here.

The width of subtextures was set to the width of
the main texture, the data size wasn't properly
calculated, and the preconditions were inverted.
Yay us!
This commit is contained in:
Matthias Clasen 2022-05-08 13:53:04 -04:00
parent 122fa679a8
commit f33c521836
1 changed files with 7 additions and 7 deletions
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14
gdk/gdkmemorytexture.c
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@ -178,19 +178,19 @@ gdk_memory_texture_new_subtexture (GdkMemoryTexture *source,
GBytes *bytes;
g_return_val_if_fail (GDK_IS_MEMORY_TEXTURE (source), NULL);
g_return_val_if_fail (x < 0 || x >= GDK_TEXTURE (source)->width, NULL);
g_return_val_if_fail (y < 0 || y >= GDK_TEXTURE (source)->height, NULL);
g_return_val_if_fail (width <= 0 || x + width > GDK_TEXTURE (source)->width, NULL);
g_return_val_if_fail (height <= 0 || y + height > GDK_TEXTURE (source)->height, NULL);
g_return_val_if_fail (x >= 0 || x < GDK_TEXTURE (source)->width, NULL);
g_return_val_if_fail (y >= 0 || y < GDK_TEXTURE (source)->height, NULL);
g_return_val_if_fail (width > 0 || x + width <= GDK_TEXTURE (source)->width, NULL);
g_return_val_if_fail (height > 0 || y + height <= GDK_TEXTURE (source)->height, NULL);
texture = GDK_TEXTURE (source);
bpp = gdk_memory_format_bytes_per_pixel (texture->format);
offset = y * source->stride + x * bpp;
size = source->stride * (height - 1) + x * bpp;
size = source->stride * (height - 1) + width * bpp;
bytes = g_bytes_new_from_bytes (source->bytes, offset, size);
result = gdk_memory_texture_new (texture->width,
texture->height,
result = gdk_memory_texture_new (width,
height,
texture->format,
bytes,
source->stride);