Expose recording renderer through pano cli

tools/pano_cli/main.cpp

@@ -7,6 +7,7 @@
 #include "foundation/result.h"
 #include "paint/stroke.h"
 #include "paint/stroke_script.h"
+#include "renderer_api/recording_renderer.h"
 #include "ui_core/layout_xml.h"
 
 #include <cstdint>
@@ -52,6 +53,11 @@ struct SimulateStrokeScriptArgs {
     std::string path;
 };
 
+struct RecordRenderArgs {
+    std::uint32_t width = 64;
+    std::uint32_t height = 32;
+};
+
 void print_error(std::string_view command, std::string_view message)
 {
     std::cout << "{\"ok\":false,\"command\":\"" << command
@@ -109,6 +115,7 @@ void print_help()
         << "  inspect-project --path FILE\n"
         << "  load-project --path FILE\n"
         << "  parse-layout --path FILE\n"
+        << "  record-render [--width N] [--height N]\n"
         << "  simulate-stroke --x1 N --y1 N --x2 N --y2 N [--spacing N]\n"
         << "  simulate-stroke-script --path FILE\n"
         << "  --help\n";
@@ -624,6 +631,121 @@ int simulate_stroke_script(int argc, char** argv)
     return 0;
 }
 
+pp::foundation::Status parse_record_render_args(int argc, char** argv, RecordRenderArgs& args)
+{
+    for (int i = 2; i < argc; ++i) {
+        const std::string_view key(argv[i]);
+        if (key == "--width" || key == "--height") {
+            if (i + 1 >= argc) {
+                return pp::foundation::Status::invalid_argument("missing value for option");
+            }
+
+            const auto value = pp::foundation::parse_u32(argv[++i]);
+            if (!value) {
+                return value.status();
+            }
+
+            if (key == "--width") {
+                args.width = value.value();
+            } else {
+                args.height = value.value();
+            }
+        } else {
+            return pp::foundation::Status::invalid_argument("unknown option");
+        }
+    }
+
+    if (args.width == 0 || args.height == 0) {
+        return pp::foundation::Status::invalid_argument("width and height must be greater than zero");
+    }
+
+    return pp::foundation::Status::success();
+}
+
+int record_render(int argc, char** argv)
+{
+    RecordRenderArgs args;
+    const auto status = parse_record_render_args(argc, argv, args);
+    if (!status.ok()) {
+        print_error("record-render", status.message);
+        return 2;
+    }
+
+    pp::renderer::RecordingRenderDevice device;
+    pp::renderer::RecordingRenderTarget target(pp::renderer::TextureDesc {
+        .extent = pp::renderer::Extent2D { .width = args.width, .height = args.height },
+        .format = pp::renderer::TextureFormat::rgba8,
+        .render_target = true,
+    });
+    pp::renderer::RecordingShaderProgram shader("pano-cli-record-render");
+    pp::renderer::RecordingMesh mesh(pp::renderer::MeshDesc {
+        .vertex_count = 3,
+        .index_count = 0,
+        .topology = pp::renderer::PrimitiveTopology::triangles,
+    });
+
+    device.trace()->marker("renderer", "pano_cli_record_render");
+    auto& context = device.immediate_context();
+    const auto begin_status = context.begin_render_pass(
+        target,
+        pp::renderer::ClearColor { .r = 0.0F, .g = 0.0F, .b = 0.0F, .a = 1.0F });
+    if (!begin_status.ok()) {
+        print_error("record-render", begin_status.message);
+        return 2;
+    }
+
+    const auto viewport_status = context.set_viewport(
+        pp::renderer::Viewport { .x = 0, .y = 0, .width = args.width, .height = args.height });
+    if (!viewport_status.ok()) {
+        print_error("record-render", viewport_status.message);
+        return 2;
+    }
+
+    const auto shader_status = context.bind_shader(shader);
+    const auto mesh_status = context.bind_mesh(mesh);
+    const auto draw_status = context.draw();
+    context.end_render_pass();
+
+    if (!shader_status.ok()) {
+        print_error("record-render", shader_status.message);
+        return 2;
+    }
+    if (!mesh_status.ok()) {
+        print_error("record-render", mesh_status.message);
+        return 2;
+    }
+    if (!draw_status.ok()) {
+        print_error("record-render", draw_status.message);
+        return 2;
+    }
+
+    std::size_t draw_commands = 0;
+    std::size_t trace_markers = 0;
+    const auto commands = device.commands();
+    for (const auto& command : commands) {
+        if (command.kind == pp::renderer::RecordedRenderCommandKind::draw) {
+            ++draw_commands;
+        } else if (command.kind == pp::renderer::RecordedRenderCommandKind::trace_marker) {
+            ++trace_markers;
+        }
+    }
+
+    std::cout << "{\"ok\":true,\"command\":\"record-render\""
+              << ",\"backend\":\"" << device.backend_name() << "\""
+              << ",\"target\":{\"width\":" << args.width
+              << ",\"height\":" << args.height
+              << ",\"format\":\"rgba8\"}"
+              << ",\"commands\":" << commands.size()
+              << ",\"drawCommands\":" << draw_commands
+              << ",\"traceMarkers\":" << trace_markers
+              << ",\"first\":\""
+              << pp::renderer::recorded_render_command_kind_name(commands.front().kind)
+              << "\",\"last\":\""
+              << pp::renderer::recorded_render_command_kind_name(commands.back().kind)
+              << "\"}\n";
+    return 0;
+}
+
 pp::foundation::Status parse_layout_args(int argc, char** argv, ParseLayoutArgs& args)
 {
     for (int i = 2; i < argc; ++i) {
@@ -721,6 +843,10 @@ int main(int argc, char** argv)
         return parse_layout(argc, argv);
     }
 
+    if (command == "record-render") {
+        return record_render(argc, argv);
+    }
+
     print_error(command, "unknown command");
     return 2;
 }