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Dawn: vertex buffer never OOB with zero stride count draw/Indexed 

According to the spec, when call draw or drawIndexed, vertex step mode
vertex buffer never OOB if (vertexCount + firstVertex) = 0, and instance
step mode vertex buffer never OOB if (instanceCount + firstInstance) = 0.
Modify the validation implementation to be aligned with the spec, and
add corresponding unit tests.
This patch also add unit test case for (strideCount - 1) * arrayStride +
lastStride <= bound buffer size < strideCount * arrayStride.

Bug: dawn:1287
Change-Id: If444e400f5ac24f86ca12ff59fb886d8ef70e8c7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/90584
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>
This commit is contained in:
Zhaoming Jiang 2022-05-19 01:32:48 +00:00 committed by Dawn LUCI CQ
parent edbd5a467b
commit 4bdded68d5
3 changed files with 219 additions and 58 deletions
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78
src/dawn/native/CommandBufferStateTracker.cpp
View File

@ -98,6 +98,13 @@ MaybeError CommandBufferStateTracker::ValidateCanDrawIndexed() {
MaybeError CommandBufferStateTracker::ValidateBufferInRangeForVertexBuffer(uint32_t vertexCount,
uint32_t firstVertex) {
uint64_t strideCount = static_cast<uint64_t>(firstVertex) + vertexCount;
if (strideCount == 0) {
// All vertex step mode buffers are always in range if stride count is zero
return {};
}
RenderPipelineBase* lastRenderPipeline = GetRenderPipeline();
const ityp::bitset<VertexBufferSlot, kMaxVertexBuffers>& vertexBufferSlotsUsedAsVertexBuffer =
@ -115,23 +122,21 @@ MaybeError CommandBufferStateTracker::ValidateBufferInRangeForVertexBuffer(uint3
bufferSize, static_cast<uint8_t>(usedSlotVertex),
vertexBuffer.usedBytesInStride);
} else {
uint64_t strideCount = static_cast<uint64_t>(firstVertex) + vertexCount;
if (strideCount != 0u) {
uint64_t requiredSize = (strideCount - 1u) * arrayStride + vertexBuffer.lastStride;
// firstVertex and vertexCount are in uint32_t,
// arrayStride must not be larger than kMaxVertexBufferArrayStride, which is
// currently 2048, and vertexBuffer.lastStride = max(attribute.offset +
// sizeof(attribute.format)) with attribute.offset being no larger than
// kMaxVertexBufferArrayStride, so by doing checks in uint64_t we avoid
// overflows.
DAWN_INVALID_IF(
requiredSize > bufferSize,
"Vertex range (first: %u, count: %u) requires a larger buffer (%u) than "
"the "
"bound buffer size (%u) of the vertex buffer at slot %u with stride %u.",
firstVertex, vertexCount, requiredSize, bufferSize,
static_cast<uint8_t>(usedSlotVertex), arrayStride);
}
DAWN_ASSERT(strideCount != 0u);
uint64_t requiredSize = (strideCount - 1u) * arrayStride + vertexBuffer.lastStride;
// firstVertex and vertexCount are in uint32_t,
// arrayStride must not be larger than kMaxVertexBufferArrayStride, which is
// currently 2048, and vertexBuffer.lastStride = max(attribute.offset +
// sizeof(attribute.format)) with attribute.offset being no larger than
// kMaxVertexBufferArrayStride, so by doing checks in uint64_t we avoid
// overflows.
DAWN_INVALID_IF(
requiredSize > bufferSize,
"Vertex range (first: %u, count: %u) requires a larger buffer (%u) than "
"the "
"bound buffer size (%u) of the vertex buffer at slot %u with stride %u.",
firstVertex, vertexCount, requiredSize, bufferSize,
static_cast<uint8_t>(usedSlotVertex), arrayStride);
}
}
@ -141,6 +146,13 @@ MaybeError CommandBufferStateTracker::ValidateBufferInRangeForVertexBuffer(uint3
MaybeError CommandBufferStateTracker::ValidateBufferInRangeForInstanceBuffer(
uint32_t instanceCount,
uint32_t firstInstance) {
uint64_t strideCount = static_cast<uint64_t>(firstInstance) + instanceCount;
if (strideCount == 0) {
// All instance step mode buffers are always in range if stride count is zero
return {};
}
RenderPipelineBase* lastRenderPipeline = GetRenderPipeline();
const ityp::bitset<VertexBufferSlot, kMaxVertexBuffers>& vertexBufferSlotsUsedAsInstanceBuffer =
@ -158,23 +170,21 @@ MaybeError CommandBufferStateTracker::ValidateBufferInRangeForInstanceBuffer(
bufferSize, static_cast<uint8_t>(usedSlotInstance),
vertexBuffer.usedBytesInStride);
} else {
uint64_t strideCount = static_cast<uint64_t>(firstInstance) + instanceCount;
if (strideCount != 0u) {
uint64_t requiredSize = (strideCount - 1u) * arrayStride + vertexBuffer.lastStride;
// firstInstance and instanceCount are in uint32_t,
// arrayStride must not be larger than kMaxVertexBufferArrayStride, which is
// currently 2048, and vertexBuffer.lastStride = max(attribute.offset +
// sizeof(attribute.format)) with attribute.offset being no larger than
// kMaxVertexBufferArrayStride, so by doing checks in uint64_t we avoid
// overflows.
DAWN_INVALID_IF(
requiredSize > bufferSize,
"Instance range (first: %u, count: %u) requires a larger buffer (%u) than "
"the "
"bound buffer size (%u) of the vertex buffer at slot %u with stride %u.",
firstInstance, instanceCount, requiredSize, bufferSize,
static_cast<uint8_t>(usedSlotInstance), arrayStride);
}
DAWN_ASSERT(strideCount != 0u);
uint64_t requiredSize = (strideCount - 1u) * arrayStride + vertexBuffer.lastStride;
// firstInstance and instanceCount are in uint32_t,
// arrayStride must not be larger than kMaxVertexBufferArrayStride, which is
// currently 2048, and vertexBuffer.lastStride = max(attribute.offset +
// sizeof(attribute.format)) with attribute.offset being no larger than
// kMaxVertexBufferArrayStride, so by doing checks in uint64_t we avoid
// overflows.
DAWN_INVALID_IF(
requiredSize > bufferSize,
"Instance range (first: %u, count: %u) requires a larger buffer (%u) than "
"the "
"bound buffer size (%u) of the vertex buffer at slot %u with stride %u.",
firstInstance, instanceCount, requiredSize, bufferSize,
static_cast<uint8_t>(usedSlotInstance), arrayStride);
}
}

5
src/dawn/native/RenderEncoderBase.cpp
View File

@ -129,10 +129,7 @@ void RenderEncoderBase::APIDrawIndexed(uint32_t indexCount,
DAWN_TRY(mCommandBufferState.ValidateIndexBufferInRange(indexCount, firstIndex));
// Although we don't know actual vertex access range in CPU, we still call the
// ValidateBufferInRangeForVertexBuffer in order to deal with those vertex step
// mode vertex buffer with an array stride of zero.
DAWN_TRY(mCommandBufferState.ValidateBufferInRangeForVertexBuffer(0, 0));
// DrawIndexed only validate instance step mode vertex buffer
DAWN_TRY(mCommandBufferState.ValidateBufferInRangeForInstanceBuffer(instanceCount,
firstInstance));
}

194
src/dawn/tests/unittests/validation/DrawVertexAndIndexBufferOOBValidationTests.cpp
View File

@ -304,6 +304,12 @@ class DrawVertexAndIndexBufferOOBValidationTests : public ValidationTest {
// Non-zero offset and size
{(2 * kFloat32x4Stride), 5 * (2 * kFloat32x4Stride), (2 * kFloat32x4Stride),
3 * (2 * kFloat32x4Stride), 3},
// For (strideCount - 1) * arrayStride + lastStride <= bound buffer size < strideCount *
// arrayStride
{(kFloat32x4Stride + 4), 2 * (kFloat32x4Stride + 4) + kFloat32x4Stride, 0, wgpu::kWholeSize,
3},
{(kFloat32x4Stride + 4), 2 * (kFloat32x4Stride + 4) + kFloat32x4Stride - 1, 0,
wgpu::kWholeSize, 2},
};
// Parameters list for instance-step-mode buffer.
const std::vector<VertexBufferParams> kInstanceParamsList = {
@ -325,6 +331,12 @@ class DrawVertexAndIndexBufferOOBValidationTests : public ValidationTest {
// Non-zero offset and size
{(3 * kFloat32x2Stride), 7 * (3 * kFloat32x2Stride), (3 * kFloat32x2Stride),
5 * (3 * kFloat32x2Stride), 5},
// For (strideCount - 1) * arrayStride + lastStride <= bound buffer size < strideCount *
// arrayStride
{(kFloat32x2Stride + 4), 2 * (kFloat32x2Stride + 4) + kFloat32x2Stride, 0, wgpu::kWholeSize,
3},
{(kFloat32x2Stride + 4), 2 * (kFloat32x2Stride + 4) + kFloat32x2Stride - 1, 0,
wgpu::kWholeSize, 2},
};
private:
@ -341,7 +353,9 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawBasic) {
{
// Implicit size
VertexBufferList vertexBufferList = {{0, vertexBuffer, 0, wgpu::kWholeSize}};
TestRenderPassDraw(pipeline, vertexBufferList, 3, 1, 0, 0, true);
TestRenderPassDraw(pipeline, vertexBufferList, /* vertexCount */ 3,
/* instanceCount */ 1, /* firstVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ true);
}
{
@ -362,9 +376,12 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawVertexBufferOutOfBoundWit
VertexBufferList vertexBufferList = {
{0, vertexBuffer, params.bufferOffsetForEncoder, params.bufferSizeForEncoder}};
DAWN_ASSERT(params.maxValidAccessNumber > 0);
uint32_t n = params.maxValidAccessNumber;
// It is ok to draw n vertices with vertex buffer
TestRenderPassDraw(pipeline, vertexBufferList, n, 1, 0, 0, true);
TestRenderPassDraw(pipeline, vertexBufferList, /* vertexCount */ n,
/* instanceCount */ 1, /* firstVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ true);
// It is ok to draw n-1 vertices with offset 1
TestRenderPassDraw(pipeline, vertexBufferList, n - 1, 1, 1, 0, true);
// Drawing more vertices will cause OOB, even if not enough for another primitive
@ -396,10 +413,14 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawVertexBufferOutOfBoundWit
instanceParams.bufferSizeForEncoder},
};
DAWN_ASSERT(vertexParams.maxValidAccessNumber > 0);
DAWN_ASSERT(instanceParams.maxValidAccessNumber > 0);
uint32_t vert = vertexParams.maxValidAccessNumber;
uint32_t inst = instanceParams.maxValidAccessNumber;
// It is ok to draw vert vertices
TestRenderPassDraw(pipeline, vertexBufferList, vert, 1, 0, 0, true);
TestRenderPassDraw(pipeline, vertexBufferList, /* vertexCount */ vert,
/* instanceCount */ 1, /* firstVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ true);
TestRenderPassDraw(pipeline, vertexBufferList, vert - 1, 1, 1, 0, true);
// It is ok to draw vert vertices and inst instences
TestRenderPassDraw(pipeline, vertexBufferList, vert, inst, 0, 0, true);
@ -432,7 +453,9 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawIndexedBasic) {
IndexBufferDesc indexBufferDesc = {indexBuffer, wgpu::IndexFormat::Uint32};
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, 12, 1, 0, 0, 0, true);
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, /* indexCount */ 12,
/* instanceCount */ 1, /* firstIndex */ 0, /* baseVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ true);
}
// Verify index buffer OOB for DrawIndexed are caught in command encoder
@ -454,10 +477,13 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawIndexedIndexBufferOOB) {
params.indexBufferOffsetForEncoder,
params.indexBufferSizeForEncoder};
DAWN_ASSERT(params.maxValidIndexNumber > 0);
uint32_t n = params.maxValidIndexNumber;
// Control case
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, n, 5, 0, 0, 0, true);
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, /* indexCount */ n,
/* instanceCount */ 5, /* firstIndex */ 0, /* baseVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ true);
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, n - 1, 5, 1, 0, 0,
true);
// Index buffer OOB, indexCount too large
@ -487,8 +513,8 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawIndexedVertexBufferOOB) {
wgpu::RenderPipeline pipeline = CreateBasicRenderPipelineWithInstance(
vertexParams.bufferStride, instanceParams.bufferStride);
auto indexFormat = wgpu::IndexFormat::Uint32;
auto indexStride = sizeof(uint32_t);
constexpr wgpu::IndexFormat indexFormat = wgpu::IndexFormat::Uint32;
constexpr uint64_t indexStride = sizeof(uint32_t);
// Build index buffer for 12 indexes
wgpu::Buffer indexBuffer = CreateBuffer(12 * indexStride, wgpu::BufferUsage::Index);
@ -505,10 +531,13 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawIndexedVertexBufferOOB) {
IndexBufferDesc indexBufferDesc = {indexBuffer, indexFormat};
DAWN_ASSERT(instanceParams.maxValidAccessNumber > 0);
uint32_t inst = instanceParams.maxValidAccessNumber;
// Control case
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, 12, inst, 0, 0,
0, true);
TestRenderPassDrawIndexed(
pipeline, indexBufferDesc, vertexBufferList, /* indexCount */ 12,
/* instanceCount */ inst, /* firstIndex */ 0, /* baseVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ true);
// Vertex buffer (stepMode = instance) OOB, instanceCount too large
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, 12, inst + 1, 0,
0, 0, false);
@ -527,8 +556,10 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, DrawIndexedVertexBufferOOB) {
}
}
// Verify instance mode vertex buffer OOB for DrawIndexed are caught in command encoder
TEST_F(DrawVertexAndIndexBufferOOBValidationTests, ZeroArrayStrideVertexBufferOOB) {
// Verify zero array stride vertex buffer OOB for Draw and DrawIndexed are caught in command encoder
// This test only test cases that strideCount > 0. Cases of strideCount == 0 are tested in
// ZeroStrideCountVertexBufferNeverOOB.
TEST_F(DrawVertexAndIndexBufferOOBValidationTests, ZeroArrayStrideVertexBuffer) {
// In this test, we use VertexBufferParams.maxValidAccessNumber > 0 to indicate that such
// buffer parameter meet the requirement of pipeline, and maxValidAccessNumber == 0 to
// indicate that such buffer parameter will cause OOB.
@ -569,8 +600,8 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, ZeroArrayStrideVertexBufferOO
for (VertexBufferParams vertexParams : kVertexParamsListForZeroStride) {
for (VertexBufferParams instanceParams : kInstanceParamsListForZeroStride) {
auto indexFormat = wgpu::IndexFormat::Uint32;
auto indexStride = sizeof(uint32_t);
constexpr wgpu::IndexFormat indexFormat = wgpu::IndexFormat::Uint32;
constexpr uint64_t indexStride = sizeof(uint32_t);
// Build index buffer for 12 indexes
wgpu::Buffer indexBuffer = CreateBuffer(12 * indexStride, wgpu::BufferUsage::Index);
@ -587,14 +618,137 @@ TEST_F(DrawVertexAndIndexBufferOOBValidationTests, ZeroArrayStrideVertexBufferOO
IndexBufferDesc indexBufferDesc = {indexBuffer, indexFormat};
const bool isSuccess = (vertexParams.maxValidAccessNumber > 0) &&
(instanceParams.maxValidAccessNumber > 0);
const bool vertexModeBufferOOB = vertexParams.maxValidAccessNumber == 0;
const bool instanceModeBufferOOB = instanceParams.maxValidAccessNumber == 0;
// Draw validate both vertex and instance step mode buffer OOB.
// vertexCount and instanceCount doesn't matter, as array stride is zero and all
// vertex/instance access the same space of buffer
TestRenderPassDraw(pipeline, vertexBufferList, 100, 100, 0, 0, isSuccess);
// indexCount doesn't matter as long as no index buffer OOB happened
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, 12, 100, 0, 0, 0,
isSuccess);
// vertex/instance access the same space of buffer, as long as both (vertexCount +
// firstVertex) and (instanceCount + firstInstance) are larger than zero.
TestRenderPassDraw(pipeline, vertexBufferList, /* vertexCount */ 100,
/* instanceCount */ 100, /* firstVertex */ 0,
/* firstInstance */ 0,
/* isSuccess */ !vertexModeBufferOOB && !instanceModeBufferOOB);
TestRenderPassDraw(pipeline, vertexBufferList, 100, 100, 100, 100,
!vertexModeBufferOOB && !instanceModeBufferOOB);
TestRenderPassDraw(pipeline, vertexBufferList, 0, 0, 100, 100,
!vertexModeBufferOOB && !instanceModeBufferOOB);
// DrawIndexed only validate instance step mode buffer OOB.
// indexCount doesn't matter as long as no index buffer OOB happened, and instanceCount
// doesn't matter as long as (instanceCount + firstInstance) are larger than zero.
TestRenderPassDrawIndexed(
pipeline, indexBufferDesc, vertexBufferList, /* indexCount */ 12,
/* instanceCount */ 100, /* firstIndex */ 0, /* baseVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ !instanceModeBufferOOB);
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, 12, 0, 0, 0, 100,
!instanceModeBufferOOB);
}
}
}
// Verify all vertex buffer never OOB for Draw and DrawIndexed with zero stride count
TEST_F(DrawVertexAndIndexBufferOOBValidationTests, ZeroStrideCountVertexBufferNeverOOB) {
// In this test we use a render pipeline with non-zero array stride and a render pipeline with
// zero array stride, both use a vertex step mode vertex buffer with lastStride = 16 and a
// instance step mode vertex buffer with lastStride = 8. Binding a buffer with size less than
// lastStride to corresponding buffer slot will result in a OOB validation error is strideCount
// is larger than 0, but shall not result in validation error if strideCount == 0.
// Create the render pipeline with non-zero array stride (larger than lastStride)
std::vector<PipelineVertexBufferDesc> bufferDescListNonZeroArrayStride = {
{20u, wgpu::VertexStepMode::Vertex, {{0, wgpu::VertexFormat::Float32x4}}},
{12u, wgpu::VertexStepMode::Instance, {{3, wgpu::VertexFormat::Float32x2}}},
};
wgpu::RenderPipeline pipelineWithNonZeroArrayStride =
CreateRenderPipelineWithBufferDesc(bufferDescListNonZeroArrayStride);
// Create the render pipeline with zero array stride
std::vector<PipelineVertexBufferDesc> bufferDescListZeroArrayStride = {
{0u, wgpu::VertexStepMode::Vertex, {{0, wgpu::VertexFormat::Float32x4}}},
{0u, wgpu::VertexStepMode::Instance, {{3, wgpu::VertexFormat::Float32x2}}},
};
wgpu::RenderPipeline pipelineWithZeroArrayStride =
CreateRenderPipelineWithBufferDesc(bufferDescListZeroArrayStride);
const std::vector<VertexBufferParams> kVertexParamsListForZeroStride = {
// Size enough for 1 vertex
{kFloat32x4Stride, 16, 0, wgpu::kWholeSize, 1},
// No enough size for 1 vertex
{kFloat32x4Stride, 19, 4, wgpu::kWholeSize, 0},
{kFloat32x4Stride, 16, 16, wgpu::kWholeSize, 0},
};
const std::vector<VertexBufferParams> kInstanceParamsListForZeroStride = {
// Size enough for 1 instance
{kFloat32x2Stride, 8, 0, wgpu::kWholeSize, 1},
// No enough size for 1 instance
{kFloat32x2Stride, 11, 4, wgpu::kWholeSize, 0},
{kFloat32x2Stride, 8, 8, wgpu::kWholeSize, 0},
};
for (VertexBufferParams vertexParams : kVertexParamsListForZeroStride) {
for (VertexBufferParams instanceParams : kInstanceParamsListForZeroStride) {
for (wgpu::RenderPipeline pipeline :
{pipelineWithNonZeroArrayStride, pipelineWithZeroArrayStride}) {
constexpr wgpu::IndexFormat indexFormat = wgpu::IndexFormat::Uint32;
constexpr uint64_t indexStride = sizeof(uint32_t);
// Build index buffer for 1 index
wgpu::Buffer indexBuffer = CreateBuffer(indexStride, wgpu::BufferUsage::Index);
// Build vertex buffer for vertices
wgpu::Buffer vertexBuffer = CreateBuffer(vertexParams.bufferSize);
// Build vertex buffer for instances
wgpu::Buffer instanceBuffer = CreateBuffer(instanceParams.bufferSize);
VertexBufferList vertexBufferList = {
{0, vertexBuffer, vertexParams.bufferOffsetForEncoder,
vertexParams.bufferSizeForEncoder},
{1, instanceBuffer, instanceParams.bufferOffsetForEncoder,
instanceParams.bufferSizeForEncoder}};
IndexBufferDesc indexBufferDesc = {indexBuffer, indexFormat};
const bool vertexModeBufferOOB = vertexParams.maxValidAccessNumber == 0;
const bool instanceModeBufferOOB = instanceParams.maxValidAccessNumber == 0;
// Draw validate both vertex and instance step mode buffer OOB.
// Control case, non-zero stride for both step mode buffer
TestRenderPassDraw(pipeline, vertexBufferList, /* vertexCount */ 1,
/* instanceCount */ 1, /* firstVertex */ 0,
/* firstInstance */ 0,
/* isSuccess */ !vertexModeBufferOOB && !instanceModeBufferOOB);
TestRenderPassDraw(pipeline, vertexBufferList, 1, 0, 0, 1,
!vertexModeBufferOOB && !instanceModeBufferOOB);
TestRenderPassDraw(pipeline, vertexBufferList, 0, 1, 1, 0,
!vertexModeBufferOOB && !instanceModeBufferOOB);
TestRenderPassDraw(pipeline, vertexBufferList, 0, 0, 1, 1,
!vertexModeBufferOOB && !instanceModeBufferOOB);
// Vertex step mode buffer will never OOB if (vertexCount + firstVertex) is zero,
// and only instance step mode buffer OOB will fail validation
TestRenderPassDraw(pipeline, vertexBufferList, 0, 1, 0, 0, !instanceModeBufferOOB);
TestRenderPassDraw(pipeline, vertexBufferList, 0, 0, 0, 1, !instanceModeBufferOOB);
// Instance step mode buffer will never OOB if (instanceCount + firstInstance) is
// zero, and only vertex step mode buffer OOB will fail validation
TestRenderPassDraw(pipeline, vertexBufferList, 1, 0, 0, 0, !vertexModeBufferOOB);
TestRenderPassDraw(pipeline, vertexBufferList, 0, 0, 1, 0, !vertexModeBufferOOB);
// If both (vertexCount + firstVertex) and (instanceCount + firstInstance) are zero,
// all vertex buffer will never OOB
TestRenderPassDraw(pipeline, vertexBufferList, 0, 0, 0, 0, true);
// DrawIndexed only validate instance step mode buffer OOB.
// Control case, non-zero stride for instance step mode buffer
TestRenderPassDrawIndexed(
pipeline, indexBufferDesc, vertexBufferList, /* indexCount */ 1,
/* instanceCount */ 1, /* firstIndex */ 0, /* baseVertex */ 0,
/* firstInstance */ 0, /* isSuccess */ !instanceModeBufferOOB);
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, 1, 0, 0, 0,
1, !instanceModeBufferOOB);
// Instance step mode buffer will never OOB if (instanceCount + firstInstance) is
// zero, validation shall always succeed
TestRenderPassDrawIndexed(pipeline, indexBufferDesc, vertexBufferList, 1, 0, 0, 0,
0, true);
}
}
}
}