GL 1.x style API

Signed-off-by: Slendi <slendi@socopon.com>

src/Application.cpp

@@ -23,6 +23,8 @@
 #include <libudev.h>
 #include <linux/input-event-codes.h>
 
+#include <smath.hpp>
+
 #include "Util.h"
 #include "VulkanRenderer.h"
 
@@ -308,7 +310,60 @@ auto Application::run() -> void
 
 		ImGui::Render();
 
-		m_renderer->render();
+		m_renderer->render([&](VulkanRenderer::GL &gl) {
+			auto view { smath::matrix_look_at(smath::Vec3 { 0.0f, 0.0f, 3.0f },
+				smath::Vec3 { 0.0f, 0.0f, 0.0f },
+				smath::Vec3 { 0.0f, 1.0f, 0.0f }, false) };
+			auto const draw_extent = m_renderer->draw_extent();
+			auto const aspect = draw_extent.height == 0
+			    ? 1.0f
+			    : static_cast<float>(draw_extent.width)
+			        / static_cast<float>(draw_extent.height);
+			auto projection { smath::matrix_perspective(
+				smath::deg(70.0f), aspect, 0.1f, 10000.0f) };
+			projection[1][1] *= -1;
+			auto view_projection { projection * view };
+
+			auto rect_model { smath::scale(
+				smath::translate(smath::Vec3 { 0.0f, 0.0f, -5.0f }),
+				smath::Vec3 { 5.0f, 5.0f, 1.0f }) };
+
+			gl.set_transform(view_projection * rect_model);
+
+			gl.set_texture();
+			auto const &meshes { m_renderer->test_meshes() };
+			if (meshes.size() > 2 && !meshes[2]->surfaces.empty()) {
+				auto const &surface = meshes[2]->surfaces[0];
+				gl.draw_mesh(meshes[2]->mesh_buffers, view_projection,
+				    surface.count, surface.start_index);
+			}
+
+			gl.set_texture(&m_renderer->white_texture());
+
+			gl.begin(VulkanRenderer::GL::GeometryKind::Quads);
+
+			gl.color(smath::Vec3 { 0.0f, 0.0f, 0.0f });
+			gl.uv(smath::Vec2 { 1.0f, 1.0f });
+			gl.vert(smath::Vec3 { 0.5f, -0.5f, 0.0f });
+
+			gl.color(smath::Vec3 { 0.5f, 0.5f, 0.5f });
+			gl.uv(smath::Vec2 { 1.0f, 0.0f });
+			gl.vert(smath::Vec3 { 0.5f, 0.5f, 0.0f });
+
+			gl.color(smath::Vec3 { 1.0f, 0.0f, 0.0f });
+			gl.uv(smath::Vec2 { 0.0f, 1.0f });
+			gl.vert(smath::Vec3 { -0.5f, -0.5f, 0.0f });
+
+			gl.color(smath::Vec3 { 0.0f, 1.0f, 0.0f });
+			gl.uv(smath::Vec2 { 0.0f, 0.0f });
+			gl.vert(smath::Vec3 { -0.5f, 0.5f, 0.0f });
+
+			gl.end();
+
+			gl.draw_rectangle({ -0.5f, 0.5f }, { 0.5f, 0.5f });
+			gl.draw_rectangle(
+			    { 0, 0.5f }, { 0.5f, 0.5f }, { Colors::TEAL, 1.0f });
+		});
 	}
 }
 

src/Colors.h

@@ -0,0 +1,177 @@
+#pragma once
+
+#include <smath.hpp>
+
+namespace Lunar::Colors {
+
+constexpr auto hex_to_vec3(uint32_t hex) -> smath::Vec3
+{
+	return smath::Vec3 { static_cast<float>((hex >> 16) & 0xFF) / 255.0f,
+		static_cast<float>((hex >> 8) & 0xFF) / 255.0f,
+		static_cast<float>(hex & 0xFF) / 255.0f };
+}
+
+inline constexpr smath::Vec3 WHITE { hex_to_vec3(0xFFFFFF) };
+inline constexpr smath::Vec3 SILVER { hex_to_vec3(0xC0C0C0) };
+inline constexpr smath::Vec3 GRAY { hex_to_vec3(0x808080) };
+inline constexpr smath::Vec3 BLACK { hex_to_vec3(0x000000) };
+inline constexpr smath::Vec3 RED { hex_to_vec3(0xFF0000) };
+inline constexpr smath::Vec3 MAROON { hex_to_vec3(0x800000) };
+inline constexpr smath::Vec3 YELLOW { hex_to_vec3(0xFFFF00) };
+inline constexpr smath::Vec3 OLIVE { hex_to_vec3(0x808000) };
+inline constexpr smath::Vec3 LIME { hex_to_vec3(0x00FF00) };
+inline constexpr smath::Vec3 GREEN { hex_to_vec3(0x008000) };
+inline constexpr smath::Vec3 AQUA { hex_to_vec3(0x00FFFF) };
+inline constexpr smath::Vec3 TEAL { hex_to_vec3(0x008080) };
+inline constexpr smath::Vec3 BLUE { hex_to_vec3(0x0000FF) };
+inline constexpr smath::Vec3 NAVY { hex_to_vec3(0x000080) };
+inline constexpr smath::Vec3 FUCHSIA { hex_to_vec3(0xFF00FF) };
+inline constexpr smath::Vec3 PURPLE { hex_to_vec3(0x800080) };
+
+// Pink colors
+inline constexpr smath::Vec3 MEDIUM_VIOLET_RED { hex_to_vec3(0xC71585) };
+inline constexpr smath::Vec3 DEEP_PINK { hex_to_vec3(0xFF1493) };
+inline constexpr smath::Vec3 PALE_VIOLET_RED { hex_to_vec3(0xDB7093) };
+inline constexpr smath::Vec3 HOT_PINK { hex_to_vec3(0xFF69B4) };
+inline constexpr smath::Vec3 LIGHT_PINK { hex_to_vec3(0xFFB6C1) };
+inline constexpr smath::Vec3 PINK { hex_to_vec3(0xFFC0CB) };
+
+// Red colors
+inline constexpr smath::Vec3 DARK_RED { hex_to_vec3(0x8B0000) };
+inline constexpr smath::Vec3 FIREBRICK { hex_to_vec3(0xB22222) };
+inline constexpr smath::Vec3 CRIMSON { hex_to_vec3(0xDC143C) };
+inline constexpr smath::Vec3 INDIAN_RED { hex_to_vec3(0xCD5C5C) };
+inline constexpr smath::Vec3 LIGHT_CORAL { hex_to_vec3(0xF08080) };
+inline constexpr smath::Vec3 SALMON { hex_to_vec3(0xFA8072) };
+inline constexpr smath::Vec3 DARK_SALMON { hex_to_vec3(0xE9967A) };
+inline constexpr smath::Vec3 LIGHT_SALMON { hex_to_vec3(0xFFA07A) };
+
+// Orange colors
+inline constexpr smath::Vec3 ORANGE_RED { hex_to_vec3(0xFF4500) };
+inline constexpr smath::Vec3 TOMATO { hex_to_vec3(0xFF6347) };
+inline constexpr smath::Vec3 DARK_ORANGE { hex_to_vec3(0xFF8C00) };
+inline constexpr smath::Vec3 CORAL { hex_to_vec3(0xFF7F50) };
+inline constexpr smath::Vec3 ORANGE { hex_to_vec3(0xFFA500) };
+
+// Yellow colors
+inline constexpr smath::Vec3 DARK_KHAKI { hex_to_vec3(0xBDB76B) };
+inline constexpr smath::Vec3 GOLD { hex_to_vec3(0xFFD700) };
+inline constexpr smath::Vec3 KHAKI { hex_to_vec3(0xF0E68C) };
+inline constexpr smath::Vec3 PEACH_PUFF { hex_to_vec3(0xFFDAB9) };
+inline constexpr smath::Vec3 PALE_GOLDENROD { hex_to_vec3(0xEEE8AA) };
+inline constexpr smath::Vec3 MOCCASIN { hex_to_vec3(0xFFE4B5) };
+inline constexpr smath::Vec3 PAPAYA_WHIP { hex_to_vec3(0xFFEFD5) };
+inline constexpr smath::Vec3 LIGHT_GOLDENROD_YELLOW { hex_to_vec3(0xFAFAD2) };
+inline constexpr smath::Vec3 LEMON_CHIFFON { hex_to_vec3(0xFFFACD) };
+inline constexpr smath::Vec3 LIGHT_YELLOW { hex_to_vec3(0xFFFFE0) };
+
+// Brown colors
+inline constexpr smath::Vec3 BROWN { hex_to_vec3(0xA52A2A) };
+inline constexpr smath::Vec3 SADDLE_BROWN { hex_to_vec3(0x8B4513) };
+inline constexpr smath::Vec3 SIENNA { hex_to_vec3(0xA0522D) };
+inline constexpr smath::Vec3 CHOCOLATE { hex_to_vec3(0xD2691E) };
+inline constexpr smath::Vec3 DARK_GOLDENROD { hex_to_vec3(0xB8860B) };
+inline constexpr smath::Vec3 PERU { hex_to_vec3(0xCD853F) };
+inline constexpr smath::Vec3 ROSY_BROWN { hex_to_vec3(0xBC8F8F) };
+inline constexpr smath::Vec3 GOLDENROD { hex_to_vec3(0xDAA520) };
+inline constexpr smath::Vec3 SANDY_BROWN { hex_to_vec3(0xF4A460) };
+inline constexpr smath::Vec3 TAN { hex_to_vec3(0xD2B48C) };
+inline constexpr smath::Vec3 BURLYWOOD { hex_to_vec3(0xDEB887) };
+inline constexpr smath::Vec3 WHEAT { hex_to_vec3(0xF5DEB3) };
+inline constexpr smath::Vec3 NAVAJO_WHITE { hex_to_vec3(0xFFDEAD) };
+inline constexpr smath::Vec3 BISQUE { hex_to_vec3(0xFFE4C4) };
+inline constexpr smath::Vec3 BLANCHED_ALMOND { hex_to_vec3(0xFFEBCD) };
+inline constexpr smath::Vec3 CORNSILK { hex_to_vec3(0xFFF8DC) };
+
+// Purple, violet, magenta colors
+inline constexpr smath::Vec3 INDIGO { hex_to_vec3(0x4B0082) };
+inline constexpr smath::Vec3 DARK_MAGENTA { hex_to_vec3(0x8B008B) };
+inline constexpr smath::Vec3 DARK_VIOLET { hex_to_vec3(0x9400D3) };
+inline constexpr smath::Vec3 DARK_SLATE_BLUE { hex_to_vec3(0x483D8B) };
+inline constexpr smath::Vec3 BLUE_VIOLET { hex_to_vec3(0x8A2BE2) };
+inline constexpr smath::Vec3 DARK_ORCHID { hex_to_vec3(0x9932CC) };
+inline constexpr smath::Vec3 MAGENTA { hex_to_vec3(0xFF00FF) };
+inline constexpr smath::Vec3 SLATE_BLUE { hex_to_vec3(0x6A5ACD) };
+inline constexpr smath::Vec3 MEDIUM_SLATE_BLUE { hex_to_vec3(0x7B68EE) };
+inline constexpr smath::Vec3 MEDIUM_ORCHID { hex_to_vec3(0xBA55D3) };
+inline constexpr smath::Vec3 MEDIUM_PURPLE { hex_to_vec3(0x9370DB) };
+inline constexpr smath::Vec3 ORCHID { hex_to_vec3(0xDA70D6) };
+inline constexpr smath::Vec3 VIOLET { hex_to_vec3(0xEE82EE) };
+inline constexpr smath::Vec3 PLUM { hex_to_vec3(0xDDA0DD) };
+inline constexpr smath::Vec3 THISTLE { hex_to_vec3(0xD8BFD8) };
+inline constexpr smath::Vec3 LAVENDER { hex_to_vec3(0xE6E6FA) };
+
+// Blue colors
+inline constexpr smath::Vec3 MIDNIGHT_BLUE { hex_to_vec3(0x191970) };
+inline constexpr smath::Vec3 DARK_BLUE { hex_to_vec3(0x00008B) };
+inline constexpr smath::Vec3 MEDIUM_BLUE { hex_to_vec3(0x0000CD) };
+inline constexpr smath::Vec3 ROYAL_BLUE { hex_to_vec3(0x4169E1) };
+inline constexpr smath::Vec3 STEEL_BLUE { hex_to_vec3(0x4682B4) };
+inline constexpr smath::Vec3 DODGER_BLUE { hex_to_vec3(0x1E90FF) };
+inline constexpr smath::Vec3 DEEP_SKY_BLUE { hex_to_vec3(0x00BFFF) };
+inline constexpr smath::Vec3 CORNFLOWER_BLUE { hex_to_vec3(0x6495ED) };
+inline constexpr smath::Vec3 SKY_BLUE { hex_to_vec3(0x87CEEB) };
+inline constexpr smath::Vec3 LIGHT_SKY_BLUE { hex_to_vec3(0x87CEFA) };
+inline constexpr smath::Vec3 LIGHT_STEEL_BLUE { hex_to_vec3(0xB0C4DE) };
+inline constexpr smath::Vec3 LIGHT_BLUE { hex_to_vec3(0xADD8E6) };
+inline constexpr smath::Vec3 POWDER_BLUE { hex_to_vec3(0xB0E0E6) };
+
+// Cyan colors
+inline constexpr smath::Vec3 DARK_CYAN { hex_to_vec3(0x008B8B) };
+inline constexpr smath::Vec3 LIGHT_SEA_GREEN { hex_to_vec3(0x20B2AA) };
+inline constexpr smath::Vec3 CADET_BLUE { hex_to_vec3(0x5F9EA0) };
+inline constexpr smath::Vec3 DARK_TURQUOISE { hex_to_vec3(0x00CED1) };
+inline constexpr smath::Vec3 MEDIUM_TURQUOISE { hex_to_vec3(0x48D1CC) };
+inline constexpr smath::Vec3 TURQUOISE { hex_to_vec3(0x40E0D0) };
+inline constexpr smath::Vec3 CYAN { hex_to_vec3(0x00FFFF) };
+inline constexpr smath::Vec3 AQUAMARINE { hex_to_vec3(0x7FFFD4) };
+inline constexpr smath::Vec3 PALE_TURQUOISE { hex_to_vec3(0xAFEEEE) };
+inline constexpr smath::Vec3 LIGHT_CYAN { hex_to_vec3(0xE0FFFF) };
+
+// Green colors
+inline constexpr smath::Vec3 DARK_GREEN { hex_to_vec3(0x006400) };
+inline constexpr smath::Vec3 DARK_OLIVE_GREEN { hex_to_vec3(0x556B2F) };
+inline constexpr smath::Vec3 FOREST_GREEN { hex_to_vec3(0x228B22) };
+inline constexpr smath::Vec3 SEA_GREEN { hex_to_vec3(0x2E8B57) };
+inline constexpr smath::Vec3 OLIVE_DRAB { hex_to_vec3(0x6B8E23) };
+inline constexpr smath::Vec3 MEDIUM_SEA_GREEN { hex_to_vec3(0x3CB371) };
+inline constexpr smath::Vec3 LIME_GREEN { hex_to_vec3(0x32CD32) };
+inline constexpr smath::Vec3 SPRING_GREEN { hex_to_vec3(0x00FF7F) };
+inline constexpr smath::Vec3 MEDIUM_SPRING_GREEN { hex_to_vec3(0x00FA9A) };
+inline constexpr smath::Vec3 DARK_SEA_GREEN { hex_to_vec3(0x8FBC8F) };
+inline constexpr smath::Vec3 MEDIUM_AQUAMARINE { hex_to_vec3(0x66CDAA) };
+inline constexpr smath::Vec3 YELLOW_GREEN { hex_to_vec3(0x9ACD32) };
+inline constexpr smath::Vec3 LAWN_GREEN { hex_to_vec3(0x7CFC00) };
+inline constexpr smath::Vec3 CHARTREUSE { hex_to_vec3(0x7FFF00) };
+inline constexpr smath::Vec3 LIGHT_GREEN { hex_to_vec3(0x90EE90) };
+inline constexpr smath::Vec3 GREEN_YELLOW { hex_to_vec3(0xADFF2F) };
+inline constexpr smath::Vec3 PALE_GREEN { hex_to_vec3(0x98FB98) };
+
+// White colors
+inline constexpr smath::Vec3 MISTY_ROSE { hex_to_vec3(0xFFE4E1) };
+inline constexpr smath::Vec3 ANTIQUE_WHITE { hex_to_vec3(0xFAEBD7) };
+inline constexpr smath::Vec3 LINEN { hex_to_vec3(0xFAF0E6) };
+inline constexpr smath::Vec3 BEIGE { hex_to_vec3(0xF5F5DC) };
+inline constexpr smath::Vec3 WHITE_SMOKE { hex_to_vec3(0xF5F5F5) };
+inline constexpr smath::Vec3 LAVENDER_BLUSH { hex_to_vec3(0xFFF0F5) };
+inline constexpr smath::Vec3 OLD_LACE { hex_to_vec3(0xFDF5E6) };
+inline constexpr smath::Vec3 ALICE_BLUE { hex_to_vec3(0xF0F8FF) };
+inline constexpr smath::Vec3 SEASHELL { hex_to_vec3(0xFFF5EE) };
+inline constexpr smath::Vec3 GHOST_WHITE { hex_to_vec3(0xF8F8FF) };
+inline constexpr smath::Vec3 HONEYDEW { hex_to_vec3(0xF0FFF0) };
+inline constexpr smath::Vec3 FLORAL_WHITE { hex_to_vec3(0xFFFAF0) };
+inline constexpr smath::Vec3 AZURE { hex_to_vec3(0xF0FFFF) };
+inline constexpr smath::Vec3 MINT_CREAM { hex_to_vec3(0xF5FFFA) };
+inline constexpr smath::Vec3 SNOW { hex_to_vec3(0xFFFAFA) };
+inline constexpr smath::Vec3 IVORY { hex_to_vec3(0xFFFFF0) };
+
+// Gray and black colors
+inline constexpr smath::Vec3 DARK_SLATE_GRAY { hex_to_vec3(0x2F4F4F) };
+inline constexpr smath::Vec3 DIM_GRAY { hex_to_vec3(0x696969) };
+inline constexpr smath::Vec3 SLATE_GRAY { hex_to_vec3(0x708090) };
+inline constexpr smath::Vec3 LIGHT_SLATE_GRAY { hex_to_vec3(0x778899) };
+inline constexpr smath::Vec3 DARK_GRAY { hex_to_vec3(0xA9A9A9) };
+inline constexpr smath::Vec3 LIGHT_GRAY { hex_to_vec3(0xD3D3D3) };
+inline constexpr smath::Vec3 GAINSBORO { hex_to_vec3(0xDCDCDC) };
+
+} // namespace Lunar::Colors

src/VulkanRenderer.cpp

@@ -6,6 +6,7 @@
 #include <cstring>
 #include <format>
 #include <iostream>
+#include <optional>
 #include <print>
 #include <stdexcept>
 
@@ -24,8 +25,422 @@ VULKAN_HPP_DEFAULT_DISPATCH_LOADER_DYNAMIC_STORAGE
 
 namespace Lunar {
 
+VulkanRenderer::GL::GL(VulkanRenderer &renderer)
+    : m_renderer(renderer)
+{
+}
+
+auto VulkanRenderer::GL::begin_drawing(vk::CommandBuffer cmd,
+    AllocatedImage &color_target, AllocatedImage *depth_target) -> void
+{
+	if (m_drawing) {
+		end_drawing();
+	}
+
+	m_cmd = cmd;
+	m_color_target = &color_target;
+	m_depth_target = depth_target;
+	m_vertices.clear();
+	m_indices.clear();
+	m_inside_primitive = false;
+	m_drawing = true;
+	m_active_pipeline = &m_renderer.m_vk.mesh_pipeline;
+	m_transform = smath::Mat4::identity();
+	m_current_color = { 1.0f, 1.0f, 1.0f, 1.0f };
+	m_current_normal = { 0.0f, 0.0f, 1.0f };
+	m_current_uv = { 0.0f, 0.0f };
+	m_bound_texture = &m_renderer.m_vk.error_image;
+
+	auto const extent = vk::Extent2D {
+		m_color_target->extent.width,
+		m_color_target->extent.height,
+	};
+
+	auto color_att { vkinit::attachment_info(m_color_target->image_view,
+		nullptr, vk::ImageLayout::eColorAttachmentOptimal) };
+	std::optional<vk::RenderingAttachmentInfo> depth_att;
+	if (m_depth_target) {
+		depth_att = vkinit::depth_attachment_info(m_depth_target->image_view,
+		    vk::ImageLayout::eDepthAttachmentOptimal);
+	}
+
+	auto render_info { vkinit::render_info(
+		extent, &color_att, depth_att ? &*depth_att : nullptr) };
+	m_cmd.beginRendering(render_info);
+
+	vk::Viewport viewport {};
+	viewport.x = 0.0f;
+	viewport.y = 0.0f;
+	viewport.width = static_cast<float>(extent.width);
+	viewport.height = static_cast<float>(extent.height);
+	viewport.minDepth = 0.0f;
+	viewport.maxDepth = 1.0f;
+	m_cmd.setViewport(0, viewport);
+
+	vk::Rect2D scissor {};
+	scissor.offset.x = 0;
+	scissor.offset.y = 0;
+	scissor.extent = extent;
+	m_cmd.setScissor(0, scissor);
+
+	bind_pipeline_if_needed();
+}
+
+auto VulkanRenderer::GL::end_drawing() -> void
+{
+	if (!m_drawing)
+		return;
+
+	if (m_inside_primitive) {
+		end();
+	}
+
+	flush();
+	m_cmd.endRendering();
+
+	m_cmd = nullptr;
+	m_color_target = nullptr;
+	m_depth_target = nullptr;
+	m_drawing = false;
+	m_active_pipeline = nullptr;
+}
+
+auto VulkanRenderer::GL::begin(GeometryKind kind) -> void
+{
+	assert(m_drawing && "begin_drawing must be called first");
+	if (m_inside_primitive) {
+		end();
+	}
+
+	m_current_kind = kind;
+	m_primitive_start = m_vertices.size();
+	m_inside_primitive = true;
+}
+
+auto VulkanRenderer::GL::color(smath::Vec3 const &rgb) -> void
+{
+	m_current_color = smath::Vec4 { rgb, 1.0f };
+}
+
+auto VulkanRenderer::GL::color(smath::Vec4 const &rgba) -> void
+{
+	m_current_color = rgba;
+}
+
+auto VulkanRenderer::GL::uv(smath::Vec2 const &uv) -> void
+{
+	m_current_uv = uv;
+}
+
+auto VulkanRenderer::GL::normal(smath::Vec3 const &normal) -> void
+{
+	m_current_normal = normal;
+}
+
+auto VulkanRenderer::GL::set_texture(
+    std::optional<AllocatedImage const *> texture) -> void
+{
+	assert(m_drawing && "begin_drawing must be called first");
+	flush();
+	m_bound_texture = texture.value_or(&m_renderer.m_vk.error_image);
+}
+
+auto VulkanRenderer::GL::end() -> void
+{
+	if (!m_inside_primitive)
+		return;
+
+	auto const count = m_vertices.size() - m_primitive_start;
+	emit_indices(m_primitive_start, count);
+	m_inside_primitive = false;
+}
+
+auto VulkanRenderer::GL::flush() -> void
+{
+	if (!m_drawing || m_vertices.empty() || m_indices.empty())
+		return;
+
+	auto const vertex_data_size { m_vertices.size() * sizeof(Vertex) };
+	auto const index_data_size { m_indices.size() * sizeof(uint32_t) };
+	auto const staging_size { vertex_data_size + index_data_size };
+
+	auto staging = m_renderer.create_buffer(staging_size,
+	    vk::BufferUsageFlagBits::eTransferSrc, VMA_MEMORY_USAGE_CPU_ONLY);
+
+	void *staging_dst = staging.info.pMappedData;
+	bool staging_mapped_here { false };
+	if (!staging_dst) {
+		VkResult res = vmaMapMemory(
+		    m_renderer.m_vk.allocator, staging.allocation, &staging_dst);
+		assert(res == VK_SUCCESS);
+		staging_mapped_here = true;
+	}
+	memcpy(staging_dst, m_vertices.data(), vertex_data_size);
+	memcpy(reinterpret_cast<uint8_t *>(staging_dst) + vertex_data_size,
+	    m_indices.data(), index_data_size);
+	if (staging_mapped_here) {
+		vmaUnmapMemory(m_renderer.m_vk.allocator, staging.allocation);
+	}
+
+	auto vertex_buffer { m_renderer.create_buffer(vertex_data_size,
+		vk::BufferUsageFlagBits::eVertexBuffer
+		    | vk::BufferUsageFlagBits::eTransferDst
+		    | vk::BufferUsageFlagBits::eShaderDeviceAddress,
+		VMA_MEMORY_USAGE_GPU_ONLY) };
+	auto index_buffer { m_renderer.create_buffer(index_data_size,
+		vk::BufferUsageFlagBits::eIndexBuffer
+		    | vk::BufferUsageFlagBits::eTransferDst,
+		VMA_MEMORY_USAGE_GPU_ONLY) };
+
+	m_renderer.immediate_submit([&](vk::CommandBuffer cmd) {
+		vk::BufferCopy vertex_copy {};
+		vertex_copy.srcOffset = 0;
+		vertex_copy.dstOffset = 0;
+		vertex_copy.size = vertex_data_size;
+		cmd.copyBuffer(
+		    staging.buffer, vertex_buffer.buffer, 1, &vertex_copy);
+
+		vk::BufferCopy index_copy {};
+		index_copy.srcOffset = vertex_data_size;
+		index_copy.dstOffset = 0;
+		index_copy.size = index_data_size;
+		cmd.copyBuffer(
+		    staging.buffer, index_buffer.buffer, 1, &index_copy);
+	},
+	    /*flush_frame_deletion_queue=*/false,
+	    /*clear_frame_descriptors=*/false);
+
+	m_renderer.destroy_buffer(staging);
+
+	auto cmd { m_cmd };
+
+	bind_pipeline_if_needed();
+
+	if (m_active_pipeline == &m_renderer.m_vk.mesh_pipeline) {
+		auto const image_set {
+			m_renderer.m_vk.get_current_frame().frame_descriptors.allocate(
+			    m_renderer.m_logger, m_renderer.m_vkb.dev.device,
+			    m_renderer.m_vk.single_image_descriptor_layout)
+		};
+
+		auto const *image
+		    = m_bound_texture ? m_bound_texture : &m_renderer.m_vk.error_image;
+		DescriptorWriter()
+		    .write_image(0, image->image_view,
+		        m_renderer.m_vk.default_sampler_nearest.get(),
+		        static_cast<VkImageLayout>(
+		            vk::ImageLayout::eShaderReadOnlyOptimal),
+		        VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER)
+		    .update_set(m_renderer.m_vkb.dev.device, image_set);
+
+		auto vk_image_set = vk::DescriptorSet { image_set };
+		cmd.bindDescriptorSets(vk::PipelineBindPoint::eGraphics,
+		    m_renderer.m_vk.mesh_pipeline.get_layout(), 0, vk_image_set, {});
+
+		GPUDrawPushConstants push_constants {};
+		push_constants.world_matrix = m_transform;
+
+		vk::BufferDeviceAddressInfo device_address_info {};
+		device_address_info.buffer = vertex_buffer.buffer;
+		push_constants.vertex_buffer
+		    = m_renderer.m_device.getBufferAddress(device_address_info);
+
+		cmd.pushConstants(m_renderer.m_vk.mesh_pipeline.get_layout(),
+		    vk::ShaderStageFlagBits::eVertex, 0, sizeof(push_constants),
+		    &push_constants);
+	}
+
+	cmd.bindIndexBuffer(index_buffer.buffer, 0, vk::IndexType::eUint32);
+	cmd.drawIndexed(static_cast<uint32_t>(m_indices.size()), 1, 0, 0, 0);
+
+	m_renderer.m_vk.get_current_frame().deletion_queue.emplace([=, this]() {
+		m_renderer.destroy_buffer(index_buffer);
+		m_renderer.destroy_buffer(vertex_buffer);
+	});
+
+	m_vertices.clear();
+	m_indices.clear();
+}
+
+auto VulkanRenderer::GL::use_pipeline(Pipeline &pipeline) -> void
+{
+	if (&pipeline == m_active_pipeline) {
+		return;
+	}
+
+	flush();
+
+	m_active_pipeline = &pipeline;
+	bind_pipeline_if_needed();
+}
+
+auto VulkanRenderer::GL::set_transform(smath::Mat4 const &transform) -> void
+{
+	flush();
+	m_transform = transform;
+}
+
+auto VulkanRenderer::GL::draw_rectangle(
+    smath::Vec2 pos, smath::Vec2 size, smath::Vec4 rect_color, float rotation)
+    -> void
+{
+	auto const half_size = size * 0.5f;
+	auto const center = pos + half_size;
+
+	auto rotate = [&](smath::Vec2 const &p) {
+		float const c = std::cos(rotation);
+		float const s = std::sin(rotation);
+		return smath::Vec2 { c * p.x() - s * p.y(), s * p.x() + c * p.y() };
+	};
+
+	auto const br = center + rotate(smath::Vec2 { half_size.x(), -half_size.y() });
+	auto const tr = center + rotate(smath::Vec2 { half_size.x(), half_size.y() });
+	auto const bl = center + rotate(smath::Vec2 { -half_size.x(), -half_size.y() });
+	auto const tl = center + rotate(smath::Vec2 { -half_size.x(), half_size.y() });
+
+	begin(GeometryKind::Quads);
+
+	color(rect_color);
+	uv(smath::Vec2 { 1.0f, 1.0f });
+	vert(smath::Vec3 { br.x(), br.y(), 0.0f });
+
+	color(rect_color);
+	uv(smath::Vec2 { 1.0f, 0.0f });
+	vert(smath::Vec3 { tr.x(), tr.y(), 0.0f });
+
+	color(rect_color);
+	uv(smath::Vec2 { 0.0f, 1.0f });
+	vert(smath::Vec3 { bl.x(), bl.y(), 0.0f });
+
+	color(rect_color);
+	uv(smath::Vec2 { 0.0f, 0.0f });
+	vert(smath::Vec3 { tl.x(), tl.y(), 0.0f });
+
+	end();
+}
+
+auto VulkanRenderer::GL::draw_mesh(GPUMeshBuffers const &mesh,
+    smath::Mat4 const &transform, uint32_t index_count, uint32_t first_index,
+    int32_t vertex_offset) -> void
+{
+	assert(m_drawing && "begin_drawing must be called first");
+
+	flush();
+	use_pipeline(m_renderer.m_vk.mesh_pipeline);
+
+	auto const image_set {
+		m_renderer.m_vk.get_current_frame().frame_descriptors.allocate(
+		    m_renderer.m_logger, m_renderer.m_vkb.dev.device,
+		    m_renderer.m_vk.single_image_descriptor_layout)
+	};
+	auto const *image
+	    = m_bound_texture ? m_bound_texture : &m_renderer.m_vk.error_image;
+	DescriptorWriter()
+	    .write_image(0, image->image_view,
+	        m_renderer.m_vk.default_sampler_nearest.get(),
+	        static_cast<VkImageLayout>(vk::ImageLayout::eShaderReadOnlyOptimal),
+	        VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER)
+	    .update_set(m_renderer.m_vkb.dev.device, image_set);
+
+	auto vk_image_set = vk::DescriptorSet { image_set };
+	m_cmd.bindDescriptorSets(vk::PipelineBindPoint::eGraphics,
+	    m_renderer.m_vk.mesh_pipeline.get_layout(), 0, vk_image_set, {});
+
+	GPUDrawPushConstants push_constants {};
+	push_constants.world_matrix = transform;
+	push_constants.vertex_buffer = mesh.vertex_buffer_address;
+
+	m_cmd.pushConstants(m_renderer.m_vk.mesh_pipeline.get_layout(),
+	    vk::ShaderStageFlagBits::eVertex, 0, sizeof(push_constants),
+	    &push_constants);
+
+	m_cmd.bindIndexBuffer(mesh.index_buffer.buffer, 0, vk::IndexType::eUint32);
+	m_cmd.drawIndexed(index_count, 1, first_index, vertex_offset, 0);
+}
+
+auto VulkanRenderer::GL::push_vertex(smath::Vec3 const &pos) -> void
+{
+	assert(m_drawing && "begin_drawing must be called first");
+
+	Vertex v {};
+	v.position = pos;
+	v.u = m_current_uv.x();
+	v.v = m_current_uv.y();
+	v.normal = m_current_normal;
+	v.color = m_current_color;
+
+	m_vertices.emplace_back(v);
+}
+
+auto VulkanRenderer::GL::emit_indices(size_t start, size_t count) -> void
+{
+	switch (m_current_kind) {
+	case GeometryKind::Triangles: {
+		for (size_t i = 0; (i + 2) < count; i += 3) {
+			m_indices.emplace_back(static_cast<uint32_t>(start + i + 0));
+			m_indices.emplace_back(static_cast<uint32_t>(start + i + 1));
+			m_indices.emplace_back(static_cast<uint32_t>(start + i + 2));
+		}
+		break;
+	}
+	case GeometryKind::TriangleStrip: {
+		if (count < 3)
+			break;
+		for (size_t i = 0; (i + 2) < count; i++) {
+			if (i % 2 == 0) {
+				m_indices.emplace_back(static_cast<uint32_t>(start + i + 0));
+				m_indices.emplace_back(static_cast<uint32_t>(start + i + 1));
+				m_indices.emplace_back(static_cast<uint32_t>(start + i + 2));
+			} else {
+				m_indices.emplace_back(static_cast<uint32_t>(start + i + 1));
+				m_indices.emplace_back(static_cast<uint32_t>(start + i + 0));
+				m_indices.emplace_back(static_cast<uint32_t>(start + i + 2));
+			}
+		}
+		break;
+	}
+	case GeometryKind::TriangleFan: {
+		if (count < 3)
+			break;
+		for (size_t i = 1; (i + 1) < count; i++) {
+			m_indices.emplace_back(static_cast<uint32_t>(start));
+			m_indices.emplace_back(static_cast<uint32_t>(start + i));
+			m_indices.emplace_back(static_cast<uint32_t>(start + i + 1));
+		}
+		break;
+	}
+	case GeometryKind::Quads: {
+		if (count < 4)
+			break;
+
+		size_t const quad_count { count / 4 };
+		for (size_t q = 0; q < quad_count; q++) {
+			size_t const base = start + q * 4;
+			m_indices.emplace_back(static_cast<uint32_t>(base + 0));
+			m_indices.emplace_back(static_cast<uint32_t>(base + 1));
+			m_indices.emplace_back(static_cast<uint32_t>(base + 2));
+
+			m_indices.emplace_back(static_cast<uint32_t>(base + 2));
+			m_indices.emplace_back(static_cast<uint32_t>(base + 1));
+			m_indices.emplace_back(static_cast<uint32_t>(base + 3));
+		}
+		break;
+	}
+	}
+}
+
+auto VulkanRenderer::GL::bind_pipeline_if_needed() -> void
+{
+	if (!m_drawing || !m_active_pipeline)
+		return;
+
+	m_cmd.bindPipeline(
+	    vk::PipelineBindPoint::eGraphics, m_active_pipeline->get());
+}
+
 VulkanRenderer::VulkanRenderer(SDL_Window *window, Logger &logger)
-    : m_window(window)
+    : gl(*this)
+    , m_window(window)
     , m_logger(logger)
 {
 	if (m_window == nullptr) {
@@ -91,7 +506,8 @@ auto VulkanRenderer::resize(uint32_t width, uint32_t height) -> void
 }
 
 auto VulkanRenderer::immediate_submit(
-    std::function<void(vk::CommandBuffer cmd)> &&function) -> void
+    std::function<void(vk::CommandBuffer cmd)> &&function,
+    bool flush_frame_deletion_queue, bool clear_frame_descriptors) -> void
 {
 	m_device.resetFences(m_vk.imm_fence.get());
 	m_vk.imm_command_buffer.get().reset();
@@ -112,8 +528,13 @@ auto VulkanRenderer::immediate_submit(
 	VK_CHECK(m_logger,
 	    m_device.waitForFences(m_vk.imm_fence.get(), true, 9'999'999'999));
 
+	if (flush_frame_deletion_queue) {
 		m_vk.get_current_frame().deletion_queue.flush();
-	m_vk.get_current_frame().frame_descriptors.clear_pools(m_vkb.dev.device);
+	}
+	if (clear_frame_descriptors) {
+		m_vk.get_current_frame().frame_descriptors.clear_pools(
+		    m_vkb.dev.device);
+	}
 }
 
 auto VulkanRenderer::vk_init() -> void
@@ -647,7 +1068,7 @@ auto VulkanRenderer::default_data_init() -> void
 	});
 }
 
-auto VulkanRenderer::render() -> void
+auto VulkanRenderer::render(std::function<void(GL &)> const &record) -> void
 {
 	defer(m_vk.frame_number++);
 
@@ -698,7 +1119,11 @@ auto VulkanRenderer::render() -> void
 	vkutil::transition_image(cmd, m_vk.depth_image.image,
 	    vk::ImageLayout::eUndefined, vk::ImageLayout::eDepthAttachmentOptimal);
 
-	draw_geometry(cmd);
+	gl.begin_drawing(cmd, m_vk.draw_image, &m_vk.depth_image);
+	if (record) {
+		record(gl);
+	}
+	gl.end_drawing();
 
 	vkutil::transition_image(cmd, m_vk.draw_image.image,
 	    vk::ImageLayout::eColorAttachmentOptimal,
@@ -767,130 +1192,6 @@ auto VulkanRenderer::draw_background(vk::CommandBuffer cmd) -> void
 	    static_cast<uint32_t>(std::ceil(m_vk.draw_extent.height / 16.0)), 1);
 }
 
-auto VulkanRenderer::draw_geometry(vk::CommandBuffer cmd) -> void
-{
-	auto gpu_scene_data_buffer { create_buffer(sizeof(GPUSceneData),
-		vk::BufferUsageFlagBits::eUniformBuffer, VMA_MEMORY_USAGE_CPU_TO_GPU) };
-	m_vk.get_current_frame().deletion_queue.emplace(
-	    [=, this]() { destroy_buffer(gpu_scene_data_buffer); });
-
-	VmaAllocationInfo info {};
-	vmaGetAllocationInfo(
-	    m_vk.allocator, gpu_scene_data_buffer.allocation, &info);
-
-	GPUSceneData *scene_uniform_data
-	    = reinterpret_cast<GPUSceneData *>(info.pMappedData);
-	if (!scene_uniform_data) {
-		VkResult res = vmaMapMemory(m_vk.allocator,
-		    gpu_scene_data_buffer.allocation, (void **)&scene_uniform_data);
-		assert(res == VK_SUCCESS);
-	}
-	defer({
-		if (info.pMappedData == nullptr) {
-			vmaUnmapMemory(m_vk.allocator, gpu_scene_data_buffer.allocation);
-		}
-	});
-
-	*scene_uniform_data = m_vk.scene_data;
-
-	auto const global_desc {
-		m_vk.get_current_frame().frame_descriptors.allocate(
-		    m_logger, m_vkb.dev.device, m_vk.gpu_scene_data_descriptor_layout)
-	};
-
-	DescriptorWriter writer;
-	writer.write_buffer(0, gpu_scene_data_buffer.buffer, sizeof(GPUSceneData),
-	    0, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER);
-	writer.update_set(m_vkb.dev.device, global_desc);
-
-	auto color_att { vkinit::attachment_info(m_vk.draw_image.image_view,
-		nullptr, vk::ImageLayout::eColorAttachmentOptimal) };
-	auto depth_att { vkinit::depth_attachment_info(m_vk.depth_image.image_view,
-		vk::ImageLayout::eDepthAttachmentOptimal) };
-	auto const render_info { vkinit::render_info(
-		m_vk.draw_extent, &color_att, &depth_att) };
-
-	cmd.beginRendering(render_info);
-
-	cmd.bindPipeline(
-	    vk::PipelineBindPoint::eGraphics, m_vk.triangle_pipeline.get());
-
-	vk::Viewport viewport {};
-	viewport.x = 0;
-	viewport.y = 0;
-	viewport.width = static_cast<float>(m_vk.draw_extent.width);
-	viewport.height = static_cast<float>(m_vk.draw_extent.height);
-	viewport.minDepth = 0.0f;
-	viewport.maxDepth = 1.0f;
-	cmd.setViewport(0, viewport);
-
-	vk::Rect2D scissor {};
-	scissor.offset.x = 0;
-	scissor.offset.y = 0;
-	scissor.extent = m_vk.draw_extent;
-	cmd.setScissor(0, scissor);
-
-	cmd.bindPipeline(
-	    vk::PipelineBindPoint::eGraphics, m_vk.mesh_pipeline.get());
-
-	auto const image_set { m_vk.get_current_frame().frame_descriptors.allocate(
-		m_logger, m_vkb.dev.device, m_vk.single_image_descriptor_layout) };
-	DescriptorWriter()
-	    .write_image(0, m_vk.error_image.image_view,
-	        m_vk.default_sampler_nearest.get(),
-	        static_cast<VkImageLayout>(vk::ImageLayout::eShaderReadOnlyOptimal),
-	        VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER)
-	    .update_set(m_vkb.dev.device, image_set);
-
-	auto vk_image_set = vk::DescriptorSet { image_set };
-	cmd.bindDescriptorSets(vk::PipelineBindPoint::eGraphics,
-	    m_vk.mesh_pipeline.get_layout(), 0, vk_image_set, {});
-
-	auto view { smath::matrix_look_at(smath::Vec3 { 0.0f, 0.0f, 3.0f },
-		smath::Vec3 { 0.0f, 0.0f, 0.0f }, smath::Vec3 { 0.0f, 1.0f, 0.0f },
-		false) };
-	auto projection {
-		smath::matrix_perspective(smath::deg(70.0f),
-		    static_cast<float>(m_vk.draw_extent.width)
-		        / static_cast<float>(m_vk.draw_extent.height),
-		    0.1f, 10000.0f),
-	};
-	projection[1][1] *= -1;
-	auto view_projection { projection * view };
-
-	GPUDrawPushConstants push_constants;
-	auto rect_model { smath::scale(
-		smath::translate(smath::Vec3 { 0.0f, 0.0f, -5.0f }),
-		smath::Vec3 { 5.0f, 5.0f, 1.0f }) };
-	push_constants.world_matrix = view_projection * rect_model;
-	push_constants.vertex_buffer = m_vk.rectangle.vertex_buffer_address;
-
-	cmd.pushConstants(m_vk.mesh_pipeline.get_layout(),
-	    vk::ShaderStageFlagBits::eVertex, 0, sizeof(push_constants),
-	    &push_constants);
-	cmd.bindIndexBuffer(
-	    m_vk.rectangle.index_buffer.buffer, 0, vk::IndexType::eUint32);
-
-	cmd.drawIndexed(6, 1, 0, 0, 0);
-
-	push_constants.vertex_buffer
-	    = m_vk.test_meshes[2]->mesh_buffers.vertex_buffer_address;
-
-	auto model { smath::Mat4::identity() };
-	push_constants.world_matrix = view_projection * model;
-
-	cmd.pushConstants(m_vk.mesh_pipeline.get_layout(),
-	    vk::ShaderStageFlagBits::eVertex, 0, sizeof(push_constants),
-	    &push_constants);
-	cmd.bindIndexBuffer(m_vk.test_meshes[2]->mesh_buffers.index_buffer.buffer,
-	    0, vk::IndexType::eUint32);
-
-	cmd.drawIndexed(m_vk.test_meshes[2]->surfaces[0].count, 1,
-	    m_vk.test_meshes[2]->surfaces[0].start_index, 0, 0);
-
-	cmd.endRendering();
-}
-
 auto VulkanRenderer::draw_imgui(
     vk::CommandBuffer cmd, vk::ImageView target_image_view) -> void
 {
@@ -1168,7 +1469,8 @@ auto VulkanRenderer::create_buffer(size_t alloc_size,
 	VmaAllocationCreateInfo alloc_ci {};
 	alloc_ci.usage = memory_usage;
 	alloc_ci.flags = 0;
-	if (memory_usage == VMA_MEMORY_USAGE_CPU_ONLY) {
+	if (memory_usage == VMA_MEMORY_USAGE_CPU_ONLY
+	    || memory_usage == VMA_MEMORY_USAGE_CPU_TO_GPU) {
 		alloc_ci.flags = VMA_ALLOCATION_CREATE_MAPPED_BIT
 		    | VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT;
 	}

src/VulkanRenderer.h

@@ -1,6 +1,8 @@
 #pragma once
 
 #include <array>
+#include <functional>
+#include <optional>
 #include <vector>
 
 #include <SDL3/SDL_video.h>
@@ -9,6 +11,7 @@
 #include <vk_mem_alloc.h>
 #include <vulkan/vulkan.hpp>
 
+#include "Colors.h"
 #include "DeletionQueue.h"
 #include "DescriptorAllocator.h"
 #include "Loader.h"
@@ -26,19 +29,121 @@ struct GPUDrawPushConstants {
 constexpr unsigned FRAME_OVERLAP = 2;
 
 struct VulkanRenderer {
+	struct GL {
+		enum class GeometryKind {
+			Triangles,
+			TriangleStrip,
+			TriangleFan,
+			Quads
+		};
+
+		explicit GL(VulkanRenderer &renderer);
+
+		auto begin_drawing(vk::CommandBuffer cmd, AllocatedImage &color_target,
+		    AllocatedImage *depth_target = nullptr) -> void;
+		auto end_drawing() -> void;
+
+		auto begin(GeometryKind kind) -> void;
+		template<size_t N>
+		auto vert(smath::Vec<N, float> const &position) -> void
+		{
+			static_assert(N == 2 || N == 3 || N == 4,
+			    "Position must be a 2D, 3D, or 4D vec");
+
+			smath::Vec3 pos { 0.0f, 0.0f, 0.0f };
+			pos[0] = position[0];
+			pos[1] = position[1];
+			if constexpr (N >= 3) {
+				pos[2] = position[2];
+			}
+
+			push_vertex(pos);
+		}
+		auto color(smath::Vec3 const &rgb) -> void;
+		auto color(smath::Vec4 const &rgba) -> void;
+		auto uv(smath::Vec2 const &uv) -> void;
+		auto normal(smath::Vec3 const &normal) -> void;
+		auto set_texture(std::optional<AllocatedImage const *> texture
+		    = std::nullopt) -> void;
+		auto draw_rectangle(smath::Vec2 pos, smath::Vec2 size,
+		    smath::Vec4 color = smath::Vec4 { Colors::WHITE, 1.0f },
+		    float rotation = 0.0f) -> void;
+		auto end() -> void;
+		auto flush() -> void;
+
+		auto use_pipeline(Pipeline &pipeline) -> void;
+		auto set_transform(smath::Mat4 const &transform) -> void;
+		auto draw_mesh(GPUMeshBuffers const &mesh, smath::Mat4 const &transform,
+		    uint32_t index_count, uint32_t first_index = 0,
+		    int32_t vertex_offset = 0) -> void;
+
+	private:
+		auto push_vertex(smath::Vec3 const &pos) -> void;
+		auto emit_indices(size_t start, size_t count) -> void;
+		auto bind_pipeline_if_needed() -> void;
+
+		VulkanRenderer &m_renderer;
+		vk::CommandBuffer m_cmd {};
+		AllocatedImage *m_color_target { nullptr };
+		AllocatedImage *m_depth_target { nullptr };
+		GeometryKind m_current_kind { GeometryKind::Triangles };
+		bool m_inside_primitive { false };
+		bool m_drawing { false };
+		Pipeline *m_active_pipeline { nullptr };
+		smath::Mat4 m_transform { smath::Mat4::identity() };
+		smath::Vec4 m_current_color { 1.0f, 1.0f, 1.0f, 1.0f };
+		smath::Vec3 m_current_normal { 0.0f, 0.0f, 1.0f };
+		smath::Vec2 m_current_uv { 0.0f, 0.0f };
+		AllocatedImage const *m_bound_texture { nullptr };
+		size_t m_primitive_start { 0 };
+		std::vector<Vertex> m_vertices;
+		std::vector<uint32_t> m_indices;
+	};
+
 	VulkanRenderer(SDL_Window *window, Logger &logger);
 	~VulkanRenderer();
 
-	auto render() -> void;
+	auto render(std::function<void(GL &)> const &record = {}) -> void;
 	auto resize(uint32_t width, uint32_t height) -> void;
 
-	auto immediate_submit(std::function<void(vk::CommandBuffer cmd)> &&function)
-	    -> void;
+	auto immediate_submit(std::function<void(vk::CommandBuffer cmd)> &&function,
+	    bool flush_frame_deletion_queue = true,
+	    bool clear_frame_descriptors = true) -> void;
 	auto upload_mesh(std::span<uint32_t> indices, std::span<Vertex> vertices)
 	    -> GPUMeshBuffers;
+	auto rectangle_mesh() const -> GPUMeshBuffers const &
+	{
+		return m_vk.rectangle;
+	}
+	auto test_meshes() const -> std::vector<std::shared_ptr<Mesh>> const &
+	{
+		return m_vk.test_meshes;
+	}
+	auto white_texture() const -> AllocatedImage const &
+	{
+		return m_vk.white_image;
+	}
+	auto gray_texture() const -> AllocatedImage const &
+	{
+		return m_vk.gray_image;
+	}
+	auto black_texture() const -> AllocatedImage const &
+	{
+		return m_vk.black_image;
+	}
+	auto error_texture() const -> AllocatedImage const &
+	{
+		return m_vk.error_image;
+	}
+	auto draw_extent() const -> vk::Extent2D { return m_vk.draw_extent; }
+	auto mesh_pipeline() -> Pipeline & { return m_vk.mesh_pipeline; }
+	auto triangle_pipeline() -> Pipeline & { return m_vk.triangle_pipeline; }
+	auto gl_api() -> GL & { return gl; }
 
 	auto logger() const -> Logger & { return m_logger; }
 
+	GL gl;
+
 private:
 	auto vk_init() -> void;
 	auto swapchain_init() -> void;
@@ -53,7 +158,6 @@ private:
 	auto default_data_init() -> void;
 
 	auto draw_background(vk::CommandBuffer cmd) -> void;
-	auto draw_geometry(vk::CommandBuffer cmd) -> void;
 	auto draw_imgui(vk::CommandBuffer cmd, vk::ImageView target_image_view)
 	    -> void;