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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [bisected][regression] piglit egl-create-pbuffer-surface and egl-gl-colorspace regressions"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110302#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [bisected][regression] piglit egl-create-pbuffer-surface and egl-gl-colorspace regressions"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110302">bug 110302</a>
from <span class="vcard"><a class="email" href="mailto:agomez@igalia.com" title="Andrés Gómez García <agomez@igalia.com>"> <span class="fn">Andrés Gómez García</span></a>
</span></b>
<pre>The difference is:
# diff -uN good-3ad2a9b3fa.txt bad-c5c38e831ee.txt
--- good-3ad2a9b3fa.txt 2019-05-30 00:18:19.237415743 +0200
+++ bad-c5c38e831ee.txt 2019-05-30 00:18:28.441484427 +0200
@@ -49,8 +49,6 @@
Mesa: glViewport 0 0 300 300
Mesa: FLUSH_VERTICES in _mesa_LoadIdentity
Mesa: glLoadIdentity()
-Mesa: FLUSH_VERTICES in _mesa_Ortho
-Mesa: glOrtho(0.000000, 300.000000, 0.000000, 300.000000, -1.000000, 1.000000)
Mesa: FLUSH_VERTICES in _mesa_LoadIdentity
Mesa: glLoadIdentity()
Mesa: glClear 0x4000
@@ -80,13 +78,13 @@
Mesa: FLUSH_VERTICES in _mesa_flush_vertices_for_blend_state
Mesa: FLUSH_VERTICES in read_pixels
Mesa: FLUSH_CURRENT in read_pixels
-Mesa: glReadPixels(20, 20, GL_RGBA, GL_UNSIGNED_BYTE, 0x5566061fe060)
+Mesa: glReadPixels(20, 20, GL_RGBA, GL_UNSIGNED_BYTE, 0x56238576fed0)
Mesa: _mesa_update_state: (0x100008) ctx->Color, ctx->Array,
: Mesa debug output: FS SIMD8 shader: 14 inst, 0 loops, 308 cycles, 0:0
spills:fills, Promoted 0 constants, compacted 224 to 176 bytes.
: Mesa debug output: FS SIMD16 shader: 14 inst, 0 loops, 322 cycles, 0:0
spills:fills, Promoted 0 constants, compacted 224 to 176 bytes.
Mesa: FLUSH_VERTICES in read_pixels
Mesa: FLUSH_CURRENT in read_pixels
-Mesa: glReadPixels(20, 20, GL_RGBA, GL_UNSIGNED_BYTE, 0x5566061fe060)
+Mesa: glReadPixels(20, 20, GL_RGBA, GL_UNSIGNED_BYTE, 0x56238576fed0)
Mesa: FLUSH_VERTICES in intel_dri2_flush_with_flags
Mesa: FLUSH_VERTICES in _mesa_flush
Mesa: FLUSH_CURRENT in _mesa_flush
@@ -97,4 +95,10 @@
Mesa: _mesa_make_current()
Mesa: _mesa_make_current()
Mesa: _mesa_make_current()
-PIGLIT: {"result": "pass" }
+Probe color at (0,0)
+ Expected: 0.000000 0.300000 0.000000
+ Observed: 0.501961 0.501961 0.501961
+Probe color at (20,0)
+ Expected: 0.000000 0.600000 0.000000
+ Observed: 0.501961 0.501961 0.501961
+PIGLIT: {"result": "fail" }
--
Basically, what we can see is, in the offending commit, glOrtho doesn't get
called.
Debugging with GDB, I see that piglit "correctly" gets the pointer to the
glOrtho function but, upon calling, nothing really happens. If I set a
breakpoint at the function, it doesn't stop. Basically, although the dispatch
table returns a pointer, it seems the pointer is not correct.</pre>
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