diff options
Diffstat (limited to 'Source/Core/VideoBackends/Vulkan/VertexManager.cpp')
| -rw-r--r-- | Source/Core/VideoBackends/Vulkan/VertexManager.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Source/Core/VideoBackends/Vulkan/VertexManager.cpp b/Source/Core/VideoBackends/Vulkan/VertexManager.cpp index e95c1d6ade..02be335aea 100644 --- a/Source/Core/VideoBackends/Vulkan/VertexManager.cpp +++ b/Source/Core/VideoBackends/Vulkan/VertexManager.cpp @@ -198,8 +198,14 @@ void VertexManager::vFlush(bool use_dst_alpha) vkCmdDrawIndexed(g_command_buffer_mgr->GetCurrentCommandBuffer(), index_count, 1, m_current_draw_base_index, m_current_draw_base_vertex, 0); - // If we can't do single pass dst alpha, we now need to draw the alpha pass. - if (use_dst_alpha && !g_vulkan_context->SupportsDualSourceBlend()) + // If the GPU does not support dual-source blending, we can approximate the effect by drawing + // the object a second time, with the write mask set to alpha only using a shader that outputs + // the destination/constant alpha value (which would normally be SRC_COLOR.a). + // + // This is also used when logic ops and destination alpha is enabled, since we can't enable + // blending and logic ops concurrently (and the logical operation applies to all channels). + bool logic_op_enabled = bpmem.blendmode.logicopenable && !bpmem.blendmode.blendenable; + if (use_dst_alpha && (!g_vulkan_context->SupportsDualSourceBlend() || logic_op_enabled)) { m_state_tracker->CheckForShaderChanges(m_current_primitive_type, DSTALPHA_ALPHA_PASS); if (!m_state_tracker->Bind()) |