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video_core: vulkan: rasterizer: Workaround on viewport swizzle on AMD
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@ -69,10 +69,17 @@ VkViewport GetViewportState(const Device& device, const Maxwell& regs, size_t in
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const float width = conv(src.scale_x * 2.0f);
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float y = conv(src.translate_y - src.scale_y);
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float height = conv(src.scale_y * 2.0f);
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if (regs.screen_y_control.y_negate) {
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bool y_negate = regs.screen_y_control.y_negate;
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if (!device.IsNvViewportSwizzleSupported()) {
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y_negate = y_negate != (src.swizzle.y == Maxwell::ViewportSwizzle::NegativeY);
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}
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if (y_negate) {
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y += height;
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height = -height;
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}
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const float reduce_z = regs.depth_mode == Maxwell::DepthMode::MinusOneToOne ? 1.0f : 0.0f;
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VkViewport viewport{
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.x = x,
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