claude_code/procedural-3d-engine
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Remove use of unportable fls() function from multisampling.cpp.

Browse source
This commit is contained in:
Bill Hollings 2017-06-22 17:55:57 -04:00
parent bc8c47bd62
commit 34ede255a9
1 changed files with 12 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

19
multisampling/multisampling.cpp
View file

@ -8,7 +8,6 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <strings.h>
#include <assert.h> #include <assert.h>
#include <vector> #include <vector>
#include <algorithm> #include <algorithm>
@ -694,7 +693,7 @@ public:
void prepare() void prepare()
{ {
setSampleCount(); sampleCount = getMaxUsableSampleCount();
VulkanExampleBase::prepare(); VulkanExampleBase::prepare();
loadAssets(); loadAssets();
setupVertexDescriptions(); setupVertexDescriptions();
@ -736,13 +735,19 @@ public:
} }
} }
// Determine the maximum sample count usable by the platform // Returns the maximum sample count usable by the platform
void setSampleCount() VkSampleCountFlagBits getMaxUsableSampleCount()
{ {
VkSampleCountFlags flags = std::min(deviceProperties.limits.framebufferColorSampleCounts, VkSampleCountFlags counts = std::min(deviceProperties.limits.framebufferColorSampleCounts,
deviceProperties.limits.framebufferDepthSampleCounts); deviceProperties.limits.framebufferDepthSampleCounts);
// Extract the value of the high-order bit of the flags
sampleCount = (VkSampleCountFlagBits)(flags ? (1 << (fls(flags) - 1)) : 0); if (counts & VK_SAMPLE_COUNT_64_BIT) { return VK_SAMPLE_COUNT_64_BIT; }
if (counts & VK_SAMPLE_COUNT_32_BIT) { return VK_SAMPLE_COUNT_32_BIT; }
if (counts & VK_SAMPLE_COUNT_16_BIT) { return VK_SAMPLE_COUNT_16_BIT; }
if (counts & VK_SAMPLE_COUNT_8_BIT) { return VK_SAMPLE_COUNT_8_BIT; }
if (counts & VK_SAMPLE_COUNT_4_BIT) { return VK_SAMPLE_COUNT_4_BIT; }
if (counts & VK_SAMPLE_COUNT_2_BIT) { return VK_SAMPLE_COUNT_2_BIT; }
return VK_SAMPLE_COUNT_1_BIT;
} }
}; };