diff --git a/util/test/demos/CMakeLists.txt b/util/test/demos/CMakeLists.txt
index a56c23e2f..82bb42037 100644
--- a/util/test/demos/CMakeLists.txt
+++ b/util/test/demos/CMakeLists.txt
@@ -45,6 +45,7 @@ set(VULKAN_SRC
vk/vk_shader_debug_zoo.cpp
vk/vk_shader_editing.cpp
vk/vk_shader_isa.cpp
+ vk/vk_shader_printf.cpp
vk/vk_simple_triangle.cpp
vk/vk_spec_constants.cpp
vk/vk_spirv_13_shaders.cpp
diff --git a/util/test/demos/demos.vcxproj b/util/test/demos/demos.vcxproj
index f522be259..11dfc43a8 100644
--- a/util/test/demos/demos.vcxproj
+++ b/util/test/demos/demos.vcxproj
@@ -305,6 +305,7 @@
+
diff --git a/util/test/demos/demos.vcxproj.filters b/util/test/demos/demos.vcxproj.filters
index 4083a4ab2..ab34d013b 100644
--- a/util/test/demos/demos.vcxproj.filters
+++ b/util/test/demos/demos.vcxproj.filters
@@ -610,6 +610,9 @@
Vulkan\demos
+
+ Vulkan\demos
+
diff --git a/util/test/demos/vk/vk_shader_printf.cpp b/util/test/demos/vk/vk_shader_printf.cpp
new file mode 100644
index 000000000..4b8907b2e
--- /dev/null
+++ b/util/test/demos/vk/vk_shader_printf.cpp
@@ -0,0 +1,218 @@
+/******************************************************************************
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019-2021 Baldur Karlsson
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ ******************************************************************************/
+
+#include "vk_test.h"
+
+RD_TEST(VK_Shader_Printf, VulkanGraphicsTest)
+{
+ static constexpr const char *Description =
+ "Tests the results of shader printf output in the replay.";
+
+ std::string common = R"EOSHADER(
+
+#version 450 core
+
+#extension GL_EXT_debug_printf : require
+
+struct v2f
+{
+ vec4 pos;
+ vec4 col;
+ vec4 uv;
+};
+
+)EOSHADER";
+
+ const std::string vertex = R"EOSHADER(
+
+layout(location = 0) in vec3 Position;
+layout(location = 1) in vec4 Color;
+layout(location = 2) in vec2 UV;
+
+layout(location = 0) out v2f vertOut;
+
+void main()
+{
+ vertOut.pos = vec4(Position.xyz*vec3(1,-1,1), 1);
+ gl_Position = vertOut.pos;
+ vertOut.col = Color;
+ vertOut.uv = vec4(UV.xy, 0, 1);
+}
+
+)EOSHADER";
+
+ const std::string pixel = R"EOSHADER(
+
+layout(location = 0) in v2f vertIn;
+
+layout(location = 0, index = 0) out vec4 Color;
+
+void main()
+{
+ if (gl_FragCoord.x >= 200 && gl_FragCoord.x <= 202 &&
+ gl_FragCoord.y >= 150 && gl_FragCoord.y <= 152)
+ {
+ debugPrintfEXT("pixel:%d,%d,%04.2v2f,%d", int(gl_FragCoord.x), int(gl_FragCoord.y), gl_FragCoord.xy, int(gl_FragCoord.x) == 201);
+ debugPrintfEXT("Invalid printf string %y");
+ }
+
+ Color = vec4(0, 1, 0, 1);
+}
+
+)EOSHADER";
+
+ const std::string comp = R"EOSHADER(
+
+layout(binding = 0, std430) buffer outbuftype {
+ uint counter;
+} outbuf;
+
+layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in;
+
+void main()
+{
+ atomicAdd(outbuf.counter, 1u);
+
+ if(gl_GlobalInvocationID.x >= 100 && gl_GlobalInvocationID.x <= 104)
+ debugPrintfEXT("compute:%v3u", gl_GlobalInvocationID);
+}
+
+)EOSHADER";
+
+ void Prepare(int argc, char **argv)
+ {
+ devExts.push_back(VK_KHR_SHADER_NON_SEMANTIC_INFO_EXTENSION_NAME);
+
+ VulkanGraphicsTest::Prepare(argc, argv);
+ }
+
+ int main()
+ {
+ // initialise, create window, create context, etc
+ if(!Init())
+ return 3;
+
+ VkDescriptorSetLayout setlayout = createDescriptorSetLayout(vkh::DescriptorSetLayoutCreateInfo({
+ {0, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1, VK_SHADER_STAGE_COMPUTE_BIT},
+ }));
+
+ VkPipelineLayout layout = createPipelineLayout(vkh::PipelineLayoutCreateInfo({setlayout}));
+
+ vkh::GraphicsPipelineCreateInfo pipeCreateInfo;
+
+ pipeCreateInfo.layout = layout;
+ pipeCreateInfo.renderPass = mainWindow->rp;
+
+ pipeCreateInfo.vertexInputState.vertexBindingDescriptions = {vkh::vertexBind(0, DefaultA2V)};
+ pipeCreateInfo.vertexInputState.vertexAttributeDescriptions = {
+ vkh::vertexAttr(0, 0, DefaultA2V, pos), vkh::vertexAttr(1, 0, DefaultA2V, col),
+ vkh::vertexAttr(2, 0, DefaultA2V, uv),
+ };
+
+ pipeCreateInfo.stages = {
+ CompileShaderModule(common + vertex, ShaderLang::glsl, ShaderStage::vert, "main"),
+ CompileShaderModule(common + pixel, ShaderLang::glsl, ShaderStage::frag, "main"),
+ };
+
+ VkPipeline pipe = createGraphicsPipeline(pipeCreateInfo);
+
+ VkPipeline comppipe = createComputePipeline(vkh::ComputePipelineCreateInfo(
+ layout, CompileShaderModule(common + comp, ShaderLang::glsl, ShaderStage::comp, "main")));
+
+ AllocatedBuffer vb(
+ this, vkh::BufferCreateInfo(sizeof(DefaultTri), VK_BUFFER_USAGE_VERTEX_BUFFER_BIT |
+ VK_BUFFER_USAGE_TRANSFER_DST_BIT),
+ VmaAllocationCreateInfo({0, VMA_MEMORY_USAGE_CPU_TO_GPU}));
+
+ vb.upload(DefaultTri);
+
+ VkDeviceSize ssbo_size = 1024;
+
+ AllocatedBuffer ssbo(this, vkh::BufferCreateInfo(ssbo_size, VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
+ VK_BUFFER_USAGE_TRANSFER_DST_BIT),
+ VmaAllocationCreateInfo({0, VMA_MEMORY_USAGE_GPU_ONLY}));
+
+ setName(ssbo.buffer, "SSBO");
+
+ VkDescriptorSet descset = allocateDescriptorSet(setlayout);
+
+ vkh::updateDescriptorSets(
+ device, {
+ vkh::WriteDescriptorSet(descset, 0, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
+ {vkh::DescriptorBufferInfo(ssbo.buffer)}),
+ });
+
+ while(Running())
+ {
+ VkCommandBuffer cmd = GetCommandBuffer();
+
+ vkBeginCommandBuffer(cmd, vkh::CommandBufferBeginInfo());
+
+ VkImage swapimg =
+ StartUsingBackbuffer(cmd, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_GENERAL);
+
+ vkCmdClearColorImage(cmd, swapimg, VK_IMAGE_LAYOUT_GENERAL,
+ vkh::ClearColorValue(0.2f, 0.2f, 0.2f, 1.0f), 1,
+ vkh::ImageSubresourceRange());
+
+ vkh::cmdPipelineBarrier(
+ cmd, {}, {vkh::BufferMemoryBarrier(VK_ACCESS_TRANSFER_WRITE_BIT,
+ VK_ACCESS_TRANSFER_WRITE_BIT, ssbo.buffer)});
+
+ vkCmdFillBuffer(cmd, ssbo.buffer, 0, ssbo_size, 0);
+
+ vkh::cmdPipelineBarrier(cmd, {},
+ {vkh::BufferMemoryBarrier(VK_ACCESS_TRANSFER_WRITE_BIT,
+ VK_ACCESS_SHADER_WRITE_BIT, ssbo.buffer)});
+
+ vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_COMPUTE, comppipe);
+ vkh::cmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_COMPUTE, layout, 0, {descset}, {});
+ vkCmdDispatch(cmd, 3, 1, 1);
+
+ vkCmdBeginRenderPass(
+ cmd, vkh::RenderPassBeginInfo(mainWindow->rp, mainWindow->GetFB(), mainWindow->scissor),
+ VK_SUBPASS_CONTENTS_INLINE);
+
+ vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, pipe);
+ vkCmdSetViewport(cmd, 0, 1, &mainWindow->viewport);
+ vkCmdSetScissor(cmd, 0, 1, &mainWindow->scissor);
+ vkh::cmdBindVertexBuffers(cmd, 0, {vb.buffer}, {0});
+ vkCmdDraw(cmd, 3, 1, 0, 0);
+
+ vkCmdEndRenderPass(cmd);
+
+ FinishUsingBackbuffer(cmd, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_GENERAL);
+
+ vkEndCommandBuffer(cmd);
+
+ Submit(0, 1, {cmd});
+
+ Present();
+ }
+
+ return 0;
+ }
+};
+
+REGISTER_TEST();
diff --git a/util/test/tests/Vulkan/VK_Shader_Printf.py b/util/test/tests/Vulkan/VK_Shader_Printf.py
new file mode 100644
index 000000000..6fdfc7260
--- /dev/null
+++ b/util/test/tests/Vulkan/VK_Shader_Printf.py
@@ -0,0 +1,74 @@
+import renderdoc as rd
+import rdtest
+import struct
+
+
+class VK_Shader_Printf(rdtest.TestCase):
+ demos_test_name = 'VK_Shader_Printf'
+
+ def check_capture(self):
+ action: rd.ActionDescription = self.find_action('CmdDraw')
+
+ self.controller.SetFrameEvent(action.eventId, True)
+
+ self.check_triangle()
+
+ ssbo = self.get_resource_by_name('SSBO').resourceId
+
+ buf_data = self.controller.GetBufferData(ssbo, 0, 0)
+
+ count = struct.unpack_from("L", buf_data)[0]
+
+ if count != 3*64:
+ raise rdtest.TestFailureException(
+ "With draw selected, buffer count is wrong: {} vs {}".format(count, 3*64))
+
+ vkpipe = self.controller.GetVulkanPipelineState()
+
+ self.check(len(vkpipe.shaderMessages) == 8, "Expected 8 messages for draw, got {}"
+ .format(len(vkpipe.shaderMessages)))
+
+ for msg in vkpipe.shaderMessages:
+ if 'Invalid' in msg.message:
+ self.check(msg.message == "Unrecognised % formatter in \"Invalid printf string %y\"",
+ "Invalid message is wrong: {}".format(msg.message))
+ else:
+ expected = "pixel:{0},{1},{0}.50, {1}.50,{2}".format(msg.location.pixel.x, msg.location.pixel.y,
+ int(msg.location.pixel.x == 201))
+ self.check(msg.message == expected,
+ "Message is wrong. Got '{}' expected '{}'".format(msg.message, expected))
+
+ self.check(msg.location.pixel.x in [200, 201, 202])
+ self.check(msg.location.pixel.y in [150, 151, 152])
+
+ action = self.find_action("CmdDispatch")
+
+ self.controller.SetFrameEvent(action.eventId, False)
+
+ vkpipe = self.controller.GetVulkanPipelineState()
+
+ buf_data = self.controller.GetBufferData(ssbo, 0, 0)
+
+ count = struct.unpack_from("L", buf_data)[0]
+
+ if count != 3*64:
+ raise rdtest.TestFailureException(
+ "With dispatch selected, buffer count is wrong: {} vs {}".format(count, 3*64))
+
+ self.check(len(vkpipe.shaderMessages) == 5, "Expected 5 messages for dispatch, got {}"
+ .format(len(vkpipe.shaderMessages)))
+
+ for msg in vkpipe.shaderMessages:
+ c = msg.location.compute
+ expected = "compute:{}, {}, {}".format(c.workgroup[0] * 64 + c.thread[0],
+ c.workgroup[1] * 64 + c.thread[1],
+ c.workgroup[2] * 64 + c.thread[2])
+ self.check(msg.message == expected,
+ "Message is wrong. Got '{}' expected '{}'".format(msg.message, expected))
+
+ self.check(c.workgroup == (1, 0, 0))
+ self.check(c.thread[1] == 0)
+ self.check(c.thread[2] == 0)
+ self.check(c.thread[0] in [36, 37, 38, 39, 40])
+
+ rdtest.log.success("All messages are as expected")