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Added ability to configure minimum uniform buffer size. PR #3478.

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This commit is contained in:
Branimir Karadžić
2025-10-29 13:52:30 -07:00
committed by Бранимир Караџић
parent 16cf4f8683
commit 55f997002f
2 changed files with 17 additions and 4 deletions
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11
src/bgfx_p.h
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@@ -1478,7 +1478,7 @@ namespace bgfx
class UniformBuffer
{
public:
static UniformBuffer* create(uint32_t _size) // = BGFX_CONFIG_UNIFORM_BUFFER_SIZE)
static UniformBuffer* create(uint32_t _size)
{
const uint32_t structSize = sizeof(UniformBuffer)-sizeof(UniformBuffer::m_buffer);
@@ -1493,13 +1493,16 @@ namespace bgfx
bx::free(g_allocator, _uniformBuffer);
}
static void update(UniformBuffer** _uniformBuffer, uint32_t _threshold = 64<<10, uint32_t _grow = 1<<20)
static void update(UniformBuffer** _uniformBuffer)
{
constexpr uint32_t kThreshold = BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_THRESHOLD_SIZE;
constexpr uint32_t kIncrement = BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_INCREMENT_SIZE;
UniformBuffer* uniformBuffer = *_uniformBuffer;
if (_threshold >= uniformBuffer->m_size - uniformBuffer->m_pos)
if (kThreshold >= uniformBuffer->m_size - uniformBuffer->m_pos)
{
const uint32_t structSize = sizeof(UniformBuffer)-sizeof(UniformBuffer::m_buffer);
uint32_t size = bx::alignUp(uniformBuffer->m_size + _grow, 16);
uint32_t size = bx::alignUp(uniformBuffer->m_size + kIncrement, 16);
void* data = bx::realloc(g_allocator, uniformBuffer, size+structSize);
uniformBuffer = reinterpret_cast<UniformBuffer*>(data);
uniformBuffer->m_size = size;

10
src/config.h
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@@ -338,6 +338,16 @@ static_assert(bx::isPowerOf2(BGFX_CONFIG_MAX_VIEWS), "BGFX_CONFIG_MAX_VIEWS must
# define BGFX_CONFIG_MIN_UNIFORM_BUFFER_SIZE (1<<20)
#endif // BGFX_CONFIG_MIN_UNIFORM_BUFFER_SIZE
#ifndef BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_THRESHOLD_SIZE
/// Max amount of unused uniform buffer space before uniform buffer resize.
# define BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_THRESHOLD_SIZE (64<<10)
#endif // BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_THRESHOLD_SIZE
#ifndef BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_INCREMENT_SIZE
/// Increment of uniform buffer resize.
# define BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_INCREMENT_SIZE (1<<20)
#endif // BGFX_CONFIG_UNIFORM_BUFFER_RESIZE_INCREMENT_SIZE
#ifndef BGFX_CONFIG_CACHED_DEVICE_MEMORY_ALLOCATIONS_SIZE
/// Amount of allowed memory allocations left on device to use for recycling during
/// later allocations. This can be beneficial in case the driver is slow allocating memory