SculptPaint: Use GPU shaders.

This is WIP/PoC patch to check how we could increase code reusability between
CPU and GPU versions.

Differential Revision: https://developer.blender.org/D16083

2 files changed, 29 insertions, 0 deletions

diff --git a/source/blender/gpu/shaders/sculpt_paint/infos/sculpt_paint_image_info.hh b/source/blender/gpu/shaders/sculpt_paint/infos/sculpt_paint_image_info.hh
new file mode 100644
index 00000000000..bc1f3b4ebf0
--- /dev/null
+++ b/source/blender/gpu/shaders/sculpt_paint/infos/sculpt_paint_image_info.hh
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2022 Blender Foundation. All rights reserved. */
+
+/** \file
+ * \ingroup gpu
+ */
+
+#include "gpu_shader_create_info.hh"
+
+GPU_SHADER_CREATE_INFO(sculpt_paint_image_compute)
+    .local_group_size(1, 1, 1)
+    .storage_buf(0, Qualifier::READ, "PackedPixelRow", "pixel_row_buf[]")
+    .storage_buf(1, Qualifier::READ, "TrianglePaintInput", "paint_input[]")
+    .image(0, GPU_RGBA32F, Qualifier::READ_WRITE, ImageType::FLOAT_2D, "out_img")
+    .compute_source("sculpt_paint_image_comp.glsl")
+    .typedef_source("GPU_sculpt_shader_shared.h")
+    .do_static_compilation(true);
diff --git a/source/blender/gpu/shaders/sculpt_paint/sculpt_paint_image_comp.glsl b/source/blender/gpu/shaders/sculpt_paint/sculpt_paint_image_comp.glsl
new file mode 100644
index 00000000000..9954967c87e
--- /dev/null
+++ b/source/blender/gpu/shaders/sculpt_paint/sculpt_paint_image_comp.glsl
@@ -0,0 +1,12 @@
+void main()
+{
+  PackedPixelRow row = pixel_row_buf[gl_GlobalInvocationID.x];
+  ivec2 image_coord = PIXEL_ROW_START_IMAGE_COORD(row);
+
+  uint row_len = PIXEL_ROW_LEN(row);
+
+  for (int i = 0; i < row_len; i++) {
+
+    imageStore(out_img, image_coord + ivec2(i, 0), float4(1.0, 0.0, 1.0, 1.0));
+  }
+}
\ No newline at end of file