test2/source/blender/gpu/vulkan/shaders/vk_backbuffer_blit_infos.hh

/* SPDX-FileCopyrightText: 2025 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

#include "gpu_shader_create_info.hh"

GPU_SHADER_CREATE_INFO(vk_backbuffer_blit)
LOCAL_GROUP_SIZE(16, 16)
IMAGE(0, SFLOAT_16_16_16_16, read, Float2D, src_img)
IMAGE(1, SFLOAT_16_16_16_16, write, Float2D, dst_img)
PUSH_CONSTANT(float, sdr_scale)
PUSH_CONSTANT(bool, use_gamma22)
COMPUTE_SOURCE("vk_backbuffer_blit_comp.glsl")
ADDITIONAL_INFO(gpu_srgb_to_framebuffer_space)
DO_STATIC_COMPILATION()
GPU_SHADER_CREATE_END()

GPU_SHADER_CREATE_INFO(vk_backbuffer_blit_gamma22)
ADDITIONAL_INFO(vk_backbuffer_blit)
DEFINE("USE_GAMMA22")
DO_STATIC_COMPILATION()
GPU_SHADER_CREATE_END()
Vulkan: HDR support for Windows This PR adds HDR support for Windows for `VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT` on `VK_FORMAT_R16G16B16A16_SFLOAT` swapchains . For nonlinear surface formats (sRGB and extended sRGB) the back buffer is blit into the swapchain, When VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT is used as surface format a compute shader is used to flip and invert the gamma. SDR white level is updated from a few window event changes, but actually none of them immediately respond to SDR white level changes in the system. That requires using the WinRT API, which we don't do so far. Current limitations: - Intel GPU support - Dual GPU support In the future we may add controls inside Blender for absolute HDR nits, across different platforms. But this makes behavior closer to macOS. See !144565 for details Co-authored-by: Brecht Van Lommel <brecht@blender.org> Pull Request: https://projects.blender.org/blender/blender/pulls/144717 2025-08-22 10:11:55 +02:00			`/* SPDX-FileCopyrightText: 2025 Blender Authors`
			`*`
			`* SPDX-License-Identifier: GPL-2.0-or-later */`

			`#include "gpu_shader_create_info.hh"`

			`GPU_SHADER_CREATE_INFO(vk_backbuffer_blit)`
			`LOCAL_GROUP_SIZE(16, 16)`
			`IMAGE(0, SFLOAT_16_16_16_16, read, Float2D, src_img)`
			`IMAGE(1, SFLOAT_16_16_16_16, write, Float2D, dst_img)`
			`PUSH_CONSTANT(float, sdr_scale)`
Color Management: Improve gamma 2.2 vs piecewise sRGB handling for HDR See the code comments for detailed explanation. But overall we use particular combinations of sRGB and gamma 2.2 encode/decode to match SDR applications while still ensuring HDR values are passed on linearly. This means the user interface and SDR content will display different in Windows HDR mode off and on, but that is consistent with other applications. Split use_hdr variable into use_hdr_buffer about the graphics buffer, and use_hdr_display about the chosen display in Blender. Ref #145022 Pull Request: https://projects.blender.org/blender/blender/pulls/145025 2025-08-23 01:23:32 +02:00			`PUSH_CONSTANT(bool, use_gamma22)`
Vulkan: HDR support for Windows This PR adds HDR support for Windows for `VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT` on `VK_FORMAT_R16G16B16A16_SFLOAT` swapchains . For nonlinear surface formats (sRGB and extended sRGB) the back buffer is blit into the swapchain, When VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT is used as surface format a compute shader is used to flip and invert the gamma. SDR white level is updated from a few window event changes, but actually none of them immediately respond to SDR white level changes in the system. That requires using the WinRT API, which we don't do so far. Current limitations: - Intel GPU support - Dual GPU support In the future we may add controls inside Blender for absolute HDR nits, across different platforms. But this makes behavior closer to macOS. See !144565 for details Co-authored-by: Brecht Van Lommel <brecht@blender.org> Pull Request: https://projects.blender.org/blender/blender/pulls/144717 2025-08-22 10:11:55 +02:00			`COMPUTE_SOURCE("vk_backbuffer_blit_comp.glsl")`
			`ADDITIONAL_INFO(gpu_srgb_to_framebuffer_space)`
			`DO_STATIC_COMPILATION()`
			`GPU_SHADER_CREATE_END()`
Color Management: Use preprocessor for gamma 2.2 vs piecewise sRGB The referenced commit introduced the use of gamma 2.2 or piecewise sRGB for the backbuffer blit depending on the operating system. This commit switches from a push constant for this to a preprocessor define. Ref https://projects.blender.org/blender/blender/commit/5d724981546e1c8dbe5c146f964c7e42ae28b690 Pull Request: https://projects.blender.org/blender/blender/pulls/146170 2025-09-12 18:30:25 +02:00
			`GPU_SHADER_CREATE_INFO(vk_backbuffer_blit_gamma22)`
			`ADDITIONAL_INFO(vk_backbuffer_blit)`
			`DEFINE("USE_GAMMA22")`
			`DO_STATIC_COMPILATION()`
			`GPU_SHADER_CREATE_END()`