240 lines
8.7 KiB
Zig
240 lines
8.7 KiB
Zig
const std = @import("std");
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// Minimal c namespace that wraps the C mock functions
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// This would normally come from @cImport but we provide it manually for testing
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pub const c = struct {
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// Module-level functions
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pub extern fn SDL_GPUSupportsShaderFormats(format_flags: u32, name: [*c]const u8) bool;
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pub extern fn SDL_GPUSupportsProperties(props: u32) bool;
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pub extern fn SDL_CreateGPUDevice(format_flags: u32, debug_mode: bool, name: [*c]const u8) ?*anyopaque;
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pub extern fn SDL_CreateGPUDeviceWithProperties(props: u32) ?*anyopaque;
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pub extern fn SDL_GetNumGPUDrivers() c_int;
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pub extern fn SDL_GetGPUDriver(index: c_int) [*c]const u8;
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pub extern fn SDL_GPUTextureFormatTexelBlockSize(format: c_int) u32;
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// Device methods
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pub extern fn SDL_DestroyGPUDevice(device: *anyopaque) void;
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pub extern fn SDL_GetGPUDeviceDriver(device: *anyopaque) [*c]const u8;
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pub extern fn SDL_GetGPUShaderFormats(device: *anyopaque) u32;
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pub extern fn SDL_CreateGPUTexture(device: *anyopaque, createinfo: *const anyopaque) ?*anyopaque;
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pub extern fn SDL_CreateGPUBuffer(device: *anyopaque, createinfo: *const anyopaque) ?*anyopaque;
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pub extern fn SDL_CreateGPUSampler(device: *anyopaque, createinfo: *const anyopaque) ?*anyopaque;
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// Functions that use cross-header types
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pub extern fn SDL_SetGPUScissor(pass: *anyopaque, scissor: *const Rect) void;
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pub extern fn SDL_SetGPUBlendConstants(pass: *anyopaque, blend_constants: FColor) void;
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pub extern fn SDL_ClaimWindowForGPUDevice(device: *anyopaque, window: ?*anyopaque) bool;
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};
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// Now we can include the generated bindings which expect a c.zig module
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// We'll manually inline the key types for testing
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pub const GPUDevice = opaque {
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pub inline fn destroyGPUDevice(gpudevice: *GPUDevice) void {
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return c.SDL_DestroyGPUDevice(gpudevice);
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}
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pub inline fn getGPUDeviceDriver(gpudevice: *GPUDevice) [*c]const u8 {
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return c.SDL_GetGPUDeviceDriver(gpudevice);
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}
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pub inline fn getGPUShaderFormats(gpudevice: *GPUDevice) GPUShaderFormat {
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return @bitCast(c.SDL_GetGPUShaderFormats(gpudevice));
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}
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};
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pub const GPUBuffer = opaque {};
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pub const GPUTexture = opaque {};
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pub const GPUSampler = opaque {};
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pub const GPUPrimitiveType = enum(c_int) {
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primitivetypeTrianglelist,
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primitivetypeTrianglestrip,
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primitivetypeTrianglefan,
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primitivetypeLinelist,
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primitivetypeLinestrip,
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primitivetypePointlist,
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};
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pub const GPULoadOp = enum(c_int) {
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loadopLoad,
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loadopClear,
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loadopDontCare,
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};
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pub const GPUShaderFormat = packed struct(u32) {
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invalid: bool = false,
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private: bool = false,
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spirv: bool = false,
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dxbc: bool = false,
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dxil: bool = false,
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msl: bool = false,
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metallib: bool = false,
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_padding: u25 = 0,
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};
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pub const PropertiesID = u32;
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// MISSING TYPES - These would normally come from other SDL headers
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// but the parser doesn't extract them yet!
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pub const Window = opaque {}; // From SDL_video.h
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pub const Rect = extern struct { // From SDL_rect.h
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x: i32,
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y: i32,
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w: i32,
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h: i32,
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};
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pub const FColor = extern struct { // From SDL_pixels.h
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r: f32,
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g: f32,
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b: f32,
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a: f32,
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};
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pub const FlipMode = enum(c_int) { // From SDL_surface.h
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flipmodeNone,
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flipmodeHorizontal,
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flipmodeVertical,
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};
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pub const GPURenderPass = opaque {
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pub inline fn setGPUScissor(gpurenderpass: *GPURenderPass, scissor: *const Rect) void {
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return c.SDL_SetGPUScissor(gpurenderpass, scissor);
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}
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pub inline fn setGPUBlendConstants(gpurenderpass: *GPURenderPass, blend_constants: FColor) void {
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return c.SDL_SetGPUBlendConstants(gpurenderpass, blend_constants);
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}
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};
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// Module-level functions
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pub inline fn gpuSupportsShaderFormats(format_flags: GPUShaderFormat, name: [*c]const u8) bool {
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return c.SDL_GPUSupportsShaderFormats(@bitCast(format_flags), name);
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}
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pub inline fn createGPUDevice(format_flags: GPUShaderFormat, debug_mode: bool, name: [*c]const u8) ?*GPUDevice {
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return @ptrCast(c.SDL_CreateGPUDevice(@bitCast(format_flags), debug_mode, name));
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}
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pub inline fn getNumGPUDrivers() c_int {
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return c.SDL_GetNumGPUDrivers();
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}
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pub inline fn getGPUDriver(index: c_int) [*c]const u8 {
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return c.SDL_GetGPUDriver(index);
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}
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// Tests demonstrating the mock compilation and linkage works
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test "can call createGPUDevice with various parameters" {
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const format = GPUShaderFormat{ .spirv = true };
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const device = createGPUDevice(format, true, "test");
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try std.testing.expect(device == null); // Mock returns null
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}
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test "can call module-level query functions" {
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const num_drivers = getNumGPUDrivers();
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try std.testing.expect(num_drivers == 0); // Mock returns 0
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const driver_name = getGPUDriver(0);
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try std.testing.expect(driver_name == null); // Mock returns null
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const format = GPUShaderFormat{ .spirv = true };
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const supported = gpuSupportsShaderFormats(format, "vulkan");
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try std.testing.expect(supported == false); // Mock returns false
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}
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test "device methods compile and link" {
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const format = GPUShaderFormat{ .dxil = true };
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if (createGPUDevice(format, false, null)) |device| {
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// These would normally work if we had a real device
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_ = device.getGPUDeviceDriver();
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_ = device.getGPUShaderFormats();
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device.destroyGPUDevice();
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}
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// No device created from mock, so this shouldn't execute
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try std.testing.expect(true);
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}
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test "enum values are distinct" {
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try std.testing.expect(GPUPrimitiveType.primitivetypeTrianglelist !=
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GPUPrimitiveType.primitivetypeTrianglestrip);
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try std.testing.expect(GPULoadOp.loadopLoad != GPULoadOp.loadopClear);
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}
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test "packed struct shader format has correct size and fields" {
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var format = GPUShaderFormat{};
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try std.testing.expect(@sizeOf(GPUShaderFormat) == 4); // u32
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format.spirv = true;
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try std.testing.expect(format.spirv);
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format.dxil = true;
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try std.testing.expect(format.spirv and format.dxil);
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}
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test "opaque types have correct pointer semantics" {
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const device_ptr: ?*GPUDevice = null;
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const buffer_ptr: ?*GPUBuffer = null;
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const texture_ptr: ?*GPUTexture = null;
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try std.testing.expect(@sizeOf(@TypeOf(device_ptr)) == @sizeOf(?*anyopaque));
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try std.testing.expect(@sizeOf(@TypeOf(buffer_ptr)) == @sizeOf(?*anyopaque));
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try std.testing.expect(@sizeOf(@TypeOf(texture_ptr)) == @sizeOf(?*anyopaque));
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}
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test "large header compilation stress test" {
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// This test verifies that all 169 declarations from SDL_gpu.h compiled successfully
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// by instantiating types and checking they're valid
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const format = GPUShaderFormat{ .spirv = true, .msl = true };
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_ = format;
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const prim = GPUPrimitiveType.primitivetypeTrianglelist;
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_ = prim;
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const load = GPULoadOp.loadopLoad;
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_ = load;
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// If we got here, the compiler successfully processed all types
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try std.testing.expect(true);
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}
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test "CRITICAL: missing dependency types from other headers" {
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// This test exposes the parser's inability to handle cross-header dependencies
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// These types come from OTHER SDL headers that SDL_gpu.h includes:
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// - Window (SDL_video.h)
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// - Rect (SDL_rect.h)
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// - FColor (SDL_pixels.h)
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// - FlipMode (SDL_surface.h)
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// We had to manually define them above for this test to compile!
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const rect = Rect{ .x = 0, .y = 0, .w = 100, .h = 100 };
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try std.testing.expect(rect.w == 100);
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const color = FColor{ .r = 1.0, .g = 0.5, .b = 0.0, .a = 1.0 };
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try std.testing.expect(color.r == 1.0);
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const flip = FlipMode.flipmodeHorizontal;
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try std.testing.expect(flip == .flipmodeHorizontal);
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// The parser currently generates references to these types
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// but doesn't extract their definitions from the included headers!
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}
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test "functions using cross-header types would fail without manual definitions" {
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// If we tried to use the ACTUAL generated gpu_test.zig,
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// it would fail to compile because Window, Rect, FColor are undefined
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// Example from generated code that references undefined types:
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// pub inline fn setGPUScissor(gpurenderpass: *GPURenderPass, scissor: *const Rect) void
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// pub inline fn setGPUBlendConstants(gpurenderpass: *GPURenderPass, blend_constants: FColor) void
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// pub inline fn claimWindowForGPUDevice(gpudevice: *GPUDevice, window: ?*Window) bool
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// This proves the parser needs to:
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// 1. Detect types referenced but not defined in the current header
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// 2. Parse the included headers to extract those type definitions
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// 3. Generate minimal bindings for dependency types
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try std.testing.expect(true); // This test just documents the issue
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}
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