powerpoint presentation€¦ · power usage 5 % memory usage 25 %. [email protected]...
TRANSCRIPT
Attempt to load Vulkan Loader
Attempt to loadBasic functions
Attempt to createinstance
Attempt to createInstance with
stable API version
Attempt to loadAll functions
Get/Check patch version from driver
1.0.0
1.0.11success = dlopen(“libVulkan.so”)
VK_SUCCESS == vkCreateInstanceVK_SUCCESS == vkCreateDevice
success = vkGetInstanceProcAddr
FIFO
Swapchain Images
#0 #1 #2
Internal queue
X*
vkAcquireNextImage
vkQueuePresent
vkAcquireNextImage
vkQueuePresent
vkAcquireNextImage
vkQueuePresent
#0X=#0
#1Y=#1
#2Z=#2
VBLANK
Swaps #0 stored in X with the backbuffer.
Latency
Y* Z*
MAILBOX
Swapchain Images
#0 #1 #2
Internal queue (impl dependant)
X*
vkAcquireNextImage
vkQueuePresent
vkAcquireNextImage
vkQueuePresent
vkAcquireNextImage
vkQueuePresent
#0X=#0
#1X=#1
#2X=#2
VBLANK
Display controller will read from #1
Latency
VK_PRESENT_MODE_MAILBOX_KHRVK_PRESENT_MODE_FIFO_KHR
?
.RGB_888VK_FORMAT_R8G8B8_UNORM
APPLICATION
JAVA ACTIVITY
CREATE SURFACE
CREATE SWAPCHAIN
APPLICATION
NATIVE ACTIVITY
CREATE SWAPCHAIN
N+2
5
RENDERFRAME N RENDERFRAME N+1 RENDERFRAME N+2 RENDERFRAME N+3
VkCommandBuffer #0 VkCommandBuffer #1 VkCommandBuffer #2 VkCommandBuffer #0
Create VkPipeline #0~#9 Use VkPipeline#0~#9
Use VkPipeline#0~#9
Use VkPipeline#5~#9
Destroy VkPipeline#0~#4
N
0 1 2 3 4
5 6 7 8 9
N+1
0 1 2 3 4
5 6 7 8 9
Use VkPipeline#5~#9
?
Crash!
6 7 8 9
RENDERFRAME N RENDERFRAME N+1
RENDERFRAME N+2
RENDERFRAME N+3
VkCommandBuffer#0
VkCommandBuffer#1
VkCommandBuffer#2
VkCommandBuffer#0
Create VkPipeline#0~#9
Check VkPipeline#0~#4
Use VkPipeline#0~#9
Use VkPipeline#0~#9
Use VkPipeline#5~#9
RENDERFRAME N+4
VkCommandBuffer#1
Destroy VkPipeline#0~#4
N
0 1 2 3 4
5 6 7 8 9
N+1
0 1 2 3 4
5 6 7 8 9
N+2
5 6 7 8 9
Check VkPipeline#0~#4
Check VkPipeline#0~#4
Use VkPipeline#5~#9
layout(set=0, binding=0) uniform buf1{
float _unif1; // #0vec3 _unif2; // #1vec2 _unif3; // #2
}
#2
#1
#0
#2#1#0
• glslangValidator applies std140 layout by default
• Best to explicitly specify layout in shader code and make
sure buffer layout matches!
VkPhysicalDeviceLimits::minUniformBufferOffsetAlignment
VkDeviceMemory vec2 vec2float float
N N N N
N N N N
N N N+1 N+1
N = N Frame MVP Matrix
N+1 = N+1 Frame MVP Matrix(Changed)
Swapchain
VkImage#0
VkImage#1
VkImage#2
VkCommandBuffer #0
VkCommandBuffer #1
VkCommandBuffer #2
UB #0
Swapchain
VkImage#0
VkImage#1
VkImage#2
VkCommandBuffer #0
VkCommandBuffer #1
VkCommandBuffer #2
UB #0 UB #1 UB #2
Swapchain
VkImage#0
VkImage#1
VkImage#2
VkCommandBuffer #0
VkCommandBuffer #1
VkCommandBuffer #2
UB #0
dynamicOffset
Original data
SHADER
OpenGL ES Driver
Driver type conversion
Original data
SHADER
Vulkan Driver
uint32 x 4
vec4
uvec4 vec4
uint32 x 4
vec4
vec4
Original data
SHADER
Vulkan Driver
uint32 x 4
uvec4
uvec4
EmptyPlease use correct
type of input.
VK_IMAGE_LAYOUT_GENERAL
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL
VK_IMAGE_LAYOUT_PRESENT_SRC_KHR
// Get Image Format PropertyVkFormatProperties formatProperty;vkGetPhysicalDeviceFormatProperties(physicalDevice, imageFormat, &formatProperty);if (formatProperty.optimalTilingFeatures & VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT) /**/;else if (formatProperty.linearTilingFeatures & VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT) /**/;
vkCmdCopyBufferToImage
VkImage with VK_TILING_OPTIMAL
VkBuffer& stagingBuffer = getStagingBuffer(imageBufferSize);VkBufferImageCopy region = getRegionFromImage(image);fillBuffer(stagingBuffer, pImageData);vkCmdCopyBufferToImage(commandBuffer, stagingBuffer, image,VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, ®ion);
DO NOT use VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT with
VK_TILING_OPTIMAL.
?
Image Data Fill image data into the VkBuffer
VkBuffer
VkCommandBuffer
Without Geometry Sorting
With Geometry Sorting
OpenGL ES 2.0 (ETC1) Vulkan (ASTC)
APK size 599 MB 521 MB
Memory (run-time) 1115 MB 557 MB
Vulkan + ASTC vs GLES + ETC1
PerformanceNormal 4 %
Throttling 30 %
Power usage 5 %
Memory usage 25 %
