This can happen when we record a VkCmdDraw in a secondary buffer that was created inheriting from the primary buffer, but with the framebuffer set to NULL in the VkCommandBufferInheritanceInfo.
Vulkan 1.1.81 spec says that "the application must ensure (using scissor if neccesary) that all rendering is contained in the render area [...] [which] must be contained within the framebuffer dimesions". While this should be done by the application, commit 465e5a86 added the clamp to the framebuffer size, in case of application does not do it. But this requires to know the framebuffer dimensions. If we do not have a framebuffer at that moment, the best compromise we can do is to just apply the scissor as it is, and let the application to ensure the rendering is contained in the render area. v2: do not clamp to framebuffer if there isn't a framebuffer v3 (Jason): - clamp earlier in the conditional - clamp to render area if command buffer is primary v4: clamp also x and y to render area (Jason) Fixes: 465e5a86 ("anv: Clamp scissors to the framebuffer boundary") CC: Jason Ekstrand <ja...@jlekstrand.net> --- src/intel/vulkan/gen7_cmd_buffer.c | 32 +++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-) diff --git a/src/intel/vulkan/gen7_cmd_buffer.c b/src/intel/vulkan/gen7_cmd_buffer.c index 352892aee33..2924c6031fd 100644 --- a/src/intel/vulkan/gen7_cmd_buffer.c +++ b/src/intel/vulkan/gen7_cmd_buffer.c @@ -70,12 +70,34 @@ gen7_cmd_buffer_emit_scissor(struct anv_cmd_buffer *cmd_buffer) }; const int max = 0xffff; + + uint32_t y = s->offset.y; + uint32_t x = s->offset.x; + uint32_t height = s->offset.y + s->extent.height - 1; + uint32_t width = s->offset.x + s->extent.width - 1; + + /* Do this math using int64_t so overflow gets clamped correctly. */ + if (cmd_buffer->level == VK_COMMAND_BUFFER_LEVEL_PRIMARY) { + y = clamp_int64((uint64_t) y, cmd_buffer->state.render_area.offset.y, max); + x = clamp_int64((uint64_t) x, cmd_buffer->state.render_area.offset.x, max); + height = clamp_int64((uint64_t) height, 0, + cmd_buffer->state.render_area.offset.y + + cmd_buffer->state.render_area.extent.height - 1); + width = clamp_int64((uint64_t) width, 0, + cmd_buffer->state.render_area.offset.x + + cmd_buffer->state.render_area.extent.width - 1); + } else if (fb) { + y = clamp_int64((uint64_t) y, 0, max); + x = clamp_int64((uint64_t) x, 0, max); + height = clamp_int64((uint64_t) height, 0, fb->height - 1); + width = clamp_int64((uint64_t) width, 0, fb->width - 1); + } + struct GEN7_SCISSOR_RECT scissor = { - /* Do this math using int64_t so overflow gets clamped correctly. */ - .ScissorRectangleYMin = clamp_int64(s->offset.y, 0, max), - .ScissorRectangleXMin = clamp_int64(s->offset.x, 0, max), - .ScissorRectangleYMax = clamp_int64((uint64_t) s->offset.y + s->extent.height - 1, 0, fb->height - 1), - .ScissorRectangleXMax = clamp_int64((uint64_t) s->offset.x + s->extent.width - 1, 0, fb->width - 1) + .ScissorRectangleYMin = y, + .ScissorRectangleXMin = x, + .ScissorRectangleYMax = height, + .ScissorRectangleXMax = width }; if (s->extent.width <= 0 || s->extent.height <= 0) { -- 2.20.1 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev