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Examples: Vulkan: Update GPU selection to pick discrete GPU if available, or use first GPU otherwise. (#4012)
Fixes examples failing on optimus laptops with integrated graphics not supporting Vulkan.
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@ -65,6 +65,7 @@ Other Changes:
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- Backends: OpenGL3: Don't try to read GL_CLIP_ORIGIN unless we're OpenGL 4.5. (#3998, #2366, #2186) [@s7jones]
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- Examples: Add OpenGL ES 2.0 support to modern GL examples. (#2837, #3951) [@lethal-guitar, @hinxx]
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- Examples: Vulkan: Rebuild swapchain on VK_SUBOPTIMAL_KHR. (#3881)
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- Examples: Vulkan: Prefer using discrete GPU if there are more than one available. (#4012) [@rokups]
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- Examples: SDL2: Link with shell32.lib required by SDL2main.lib since SDL 2.0.12. [#3988]
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- Docs: Improvements to minor mistakes in documentation comments (#3923) [@ANF-Studios]
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@ -122,10 +122,22 @@ static void SetupVulkan(const char** extensions, uint32_t extensions_count)
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err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus);
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check_vk_result(err);
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// If a number >1 of GPUs got reported, you should find the best fit GPU for your purpose
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// e.g. VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU if available, or with the greatest memory available, etc.
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// for sake of simplicity we'll just take the first one, assuming it has a graphics queue family.
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g_PhysicalDevice = gpus[0];
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// If a number >1 of GPUs got reported, find discrete GPU if present, or use first one available. This covers
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// most common cases (multi-gpu/integrated+dedicated graphics). Handling more complicated setups (multiple
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// dedicated GPUs) is out of scope of this sample.
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int use_gpu = 0;
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for (int i = 0; i < (int)gpu_count; i++)
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{
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VkPhysicalDeviceProperties properties;
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vkGetPhysicalDeviceProperties(gpus[i], &properties);
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if (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
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{
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use_gpu = i;
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break;
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}
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}
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g_PhysicalDevice = gpus[use_gpu];
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free(gpus);
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}
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@ -114,10 +114,22 @@ static void SetupVulkan(const char** extensions, uint32_t extensions_count)
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err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus);
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check_vk_result(err);
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// If a number >1 of GPUs got reported, you should find the best fit GPU for your purpose
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// e.g. VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU if available, or with the greatest memory available, etc.
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// for sake of simplicity we'll just take the first one, assuming it has a graphics queue family.
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g_PhysicalDevice = gpus[0];
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// If a number >1 of GPUs got reported, find discrete GPU if present, or use first one available. This covers
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// most common cases (multi-gpu/integrated+dedicated graphics). Handling more complicated setups (multiple
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// dedicated GPUs) is out of scope of this sample.
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int use_gpu = 0;
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for (int i = 0; i < (int)gpu_count; i++)
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{
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VkPhysicalDeviceProperties properties;
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vkGetPhysicalDeviceProperties(gpus[i], &properties);
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if (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
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{
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use_gpu = i;
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break;
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}
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}
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g_PhysicalDevice = gpus[use_gpu];
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free(gpus);
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}
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