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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - glBlitFramebuffer fails on MSAA fbo source."
href="https://bugs.freedesktop.org/show_bug.cgi?id=110253">110253</a>
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<th>Summary</th>
<td>glBlitFramebuffer fails on MSAA fbo source.
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>19.0
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Gallium/swr
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
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<th>Reporter</th>
<td>wanghaipeng03@baidu.com
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
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<pre><a href="https://github.com/mesa3d/mesa/blob/master/src/gallium/drivers/swr/swr_screen.cpp#L908">https://github.com/mesa3d/mesa/blob/master/src/gallium/drivers/swr/swr_screen.cpp#L908</a>
<a href="https://github.com/mesa3d/mesa/blob/master/src/gallium/drivers/swr/swr_screen.cpp#L105">https://github.com/mesa3d/mesa/blob/master/src/gallium/drivers/swr/swr_screen.cpp#L105</a>
when using MSAA fbo as read source, and OSMesa framebuffer as target,
glBlitFramebuffer fails。
swr_blit: color resolve : 8 -> 0
swr: blit unsupported r8g8b8a8_unorm -> r8g8b8a8_unorm
I think it may be solved by setting nr_storage_samples to 0 in
src/gallium/drivers/swr/swr_screen.cpp swr_create_resolve_resource
/* Create a single-sample copy of the resource. Copy the original
* resource parameters and set flag to prevent recursion when re-calling
* resource_create */
struct pipe_resource alt_template = msaa_res->base;
alt_template.nr_samples = 0;
alt_template.nr_storage_samples = 0;
alt_template.flags |= SWR_RESOURCE_FLAG_ALT_SURFACE;</pre>
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