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b6dc23370d
This just creates a 1x1 RGBA texture and then reads it back in COGL_PIXEL_FORMAT_A_8 format. Gnome Shell is doing this to create a shadow and I accidentally broke it so this should hopefully stop that happening again. https://bugzilla.gnome.org/show_bug.cgi?id=671016 Reviewed-by: Robert Bragg <robert@linux.intel.com>
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
#include <cogl/cogl2-experimental.h>
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#include "test-utils.h"
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/*
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* This tests reading back an RGBA texture in alpha-only format.
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* This test just exists because I accidentally broke it and
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* gnome-shell is doing it.
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*
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* https://bugzilla.gnome.org/show_bug.cgi?id=671016
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*/
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static const guint8 tex_data[4] = { 0x12, 0x34, 0x56, 0x78 };
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void
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test_cogl_read_alpha_texture (TestUtilsGTestFixture *fixture,
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void *data)
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{
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TestUtilsSharedState *shared_state = data;
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CoglTexture2D *tex_2d;
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guint8 alpha_value;
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tex_2d = cogl_texture_2d_new_from_data (shared_state->ctx,
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1, 1, /* width / height */
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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4, /* rowstride */
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tex_data,
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NULL);
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cogl_texture_get_data (COGL_TEXTURE (tex_2d),
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COGL_PIXEL_FORMAT_A_8,
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1, /* rowstride */
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&alpha_value);
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cogl_object_unref (tex_2d);
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g_assert_cmpint (alpha_value, ==, 0x78);
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if (g_test_verbose ())
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g_print ("OK\n");
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}
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