diff options
Diffstat (limited to 'source/blender/gpu')
-rw-r--r-- | source/blender/gpu/CMakeLists.txt | 2 | ||||
-rw-r--r-- | source/blender/gpu/shaders/compositor/compositor_blur.glsl | 55 | ||||
-rw-r--r-- | source/blender/gpu/shaders/compositor/infos/compositor_blur_info.hh | 14 |
3 files changed, 71 insertions, 0 deletions
diff --git a/source/blender/gpu/CMakeLists.txt b/source/blender/gpu/CMakeLists.txt index cb5bb4331f9..8b38c22ae28 100644 --- a/source/blender/gpu/CMakeLists.txt +++ b/source/blender/gpu/CMakeLists.txt @@ -326,6 +326,7 @@ set(GLSL_SRC shaders/compositor/compositor_alpha_crop.glsl shaders/compositor/compositor_bilateral_blur.glsl + shaders/compositor/compositor_blur.glsl shaders/compositor/compositor_bokeh_image.glsl shaders/compositor/compositor_box_mask.glsl shaders/compositor/compositor_convert.glsl @@ -604,6 +605,7 @@ set(SRC_SHADER_CREATE_INFOS shaders/compositor/infos/compositor_alpha_crop_info.hh shaders/compositor/infos/compositor_bilateral_blur_info.hh + shaders/compositor/infos/compositor_blur_info.hh shaders/compositor/infos/compositor_bokeh_image_info.hh shaders/compositor/infos/compositor_box_mask_info.hh shaders/compositor/infos/compositor_convert_info.hh diff --git a/source/blender/gpu/shaders/compositor/compositor_blur.glsl b/source/blender/gpu/shaders/compositor/compositor_blur.glsl new file mode 100644 index 00000000000..4f981c84f59 --- /dev/null +++ b/source/blender/gpu/shaders/compositor/compositor_blur.glsl @@ -0,0 +1,55 @@ +#pragma BLENDER_REQUIRE(gpu_shader_common_math_utils.glsl) +#pragma BLENDER_REQUIRE(gpu_shader_compositor_texture_utilities.glsl) + +vec4 load_input(ivec2 texel) +{ + vec4 color; + if (extend_bounds) { + /* If bounds are extended, then we treat the input as padded by a radius amount of pixels. So + * we load the input with an offset by the radius amount and fallback to a transparent color if + * it is out of bounds. */ + color = texture_load(input_tx, texel - radius, vec4(0.0)); + } + else { + color = texture_load(input_tx, texel); + } + + return color; +} + +/* Given the texel in the range [-radius, radius] in both axis, load the appropriate weight from + * the weights texture, where the texel (0, 0) is considered the center of weights texture. */ +vec4 load_weight(ivec2 texel) +{ + /* Add the radius to transform the texel into the range [0, radius * 2], then divide by the upper + * bound plus one to transform the texel into the normalized range [0, 1] needed to sample the + * weights sampler. Finally, also add 0.5 to sample at the center of the pixels. */ + return texture(weights_tx, (texel + vec2(radius + 0.5)) / (radius * 2 + 1)); +} + +void main() +{ + ivec2 texel = ivec2(gl_GlobalInvocationID.xy); + + /* The mask input is treated as a boolean. If it is zero, then no blurring happens for this + * pixel. Otherwise, the pixel is blurred normally and the mask value is irrelevant. */ + float mask = texture_load(mask_tx, texel).x; + if (mask == 0.0) { + imageStore(output_img, texel, texture_load(input_tx, texel)); + return; + } + + /* Go over the window of the given radius and accumulate the colors multiplied by their + * respective weights as well as the weights themselves. */ + vec4 accumulated_color = vec4(0.0); + vec4 accumulated_weight = vec4(0.0); + for (int y = -radius; y <= radius; y++) { + for (int x = -radius; x <= radius; x++) { + vec4 weight = load_weight(ivec2(x, y)); + accumulated_color += load_input(texel + ivec2(x, y)) * weight; + accumulated_weight += weight; + } + } + + imageStore(output_img, texel, safe_divide(accumulated_color, accumulated_weight)); +} diff --git a/source/blender/gpu/shaders/compositor/infos/compositor_blur_info.hh b/source/blender/gpu/shaders/compositor/infos/compositor_blur_info.hh new file mode 100644 index 00000000000..36b772aa486 --- /dev/null +++ b/source/blender/gpu/shaders/compositor/infos/compositor_blur_info.hh @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include "gpu_shader_create_info.hh" + +GPU_SHADER_CREATE_INFO(compositor_blur) + .local_group_size(16, 16) + .push_constant(Type::INT, "radius") + .push_constant(Type::BOOL, "extend_bounds") + .sampler(0, ImageType::FLOAT_2D, "input_tx") + .sampler(1, ImageType::FLOAT_2D, "weights_tx") + .sampler(2, ImageType::FLOAT_2D, "mask_tx") + .image(0, GPU_RGBA16F, Qualifier::WRITE, ImageType::FLOAT_2D, "output_img") + .compute_source("compositor_blur.glsl") + .do_static_compilation(true); |