zig/mach
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

examples: core-custom-entrypoint: revise based on SYCL24 learnings

Browse source 
Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2024-04-16 20:48:22 -07:00
parent 4ba8addb3c
commit ac4fe65eb2
1 changed files with 35 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

54
examples/core-custom-entrypoint/Game.zig
View file

@ -14,21 +14,27 @@ title_timer: mach.Timer,
pipeline: *gpu.RenderPipeline,
fn init(game: *Mod) !void {
// Create our shader module
const shader_module = mach.core.device.createShaderModuleWGSL("shader.wgsl", @embedFile("shader.wgsl"));
defer shader_module.release();
// Fragment state
// Blend state describes how rendered colors get blended
const blend = gpu.BlendState{};
// Color target describes e.g. the pixel format of the window we are rendering to.
const color_target = gpu.ColorTargetState{
.format = mach.core.descriptor.format,
.blend = &blend,
.write_mask = gpu.ColorWriteMaskFlags.all,
};
// Fragment state describes which shader and entrypoint to use for rendering fragments.
const fragment = gpu.FragmentState.init(.{
.module = shader_module,
.entry_point = "frag_main",
.targets = &.{color_target},
});
// Create our render pipeline that will ultimately get pixels onto the screen.
const pipeline_descriptor = gpu.RenderPipeline.Descriptor{
.fragment = &fragment,
.vertex = gpu.VertexState{
@ -38,6 +44,7 @@ fn init(game: *Mod) !void {
};
const pipeline = mach.core.device.createRenderPipeline(&pipeline_descriptor);
// Store our render pipeline in our module's state, so we can access it later on.
game.init(.{
.title_timer = try mach.Timer.start(),
.pipeline = pipeline,
@ -63,32 +70,41 @@ fn tick(
}
}
const queue = mach.core.queue;
// Grab the back buffer of the swapchain
const back_buffer_view = mach.core.swap_chain.getCurrentTextureView().?;
const color_attachment = gpu.RenderPassColorAttachment{
defer back_buffer_view.release();
// Create a command encoder
const encoder = mach.core.device.createCommandEncoder(null);
defer encoder.release();
// Begin render pass
const sky_blue_background = gpu.Color{ .r = 0.776, .g = 0.988, .b = 1, .a = 1 };
const color_attachments = [_]gpu.RenderPassColorAttachment{.{
.view = back_buffer_view,
.clear_value = std.mem.zeroes(gpu.Color),
.clear_value = sky_blue_background,
.load_op = .clear,
.store_op = .store,
};
}};
const render_pass = encoder.beginRenderPass(&gpu.RenderPassDescriptor.init(.{
.label = "main render pass",
.color_attachments = &color_attachments,
}));
const encoder = mach.core.device.createCommandEncoder(null);
const render_pass_info = gpu.RenderPassDescriptor.init(.{
.color_attachments = &.{color_attachment},
});
const pass = encoder.beginRenderPass(&render_pass_info);
pass.setPipeline(game.state().pipeline);
pass.draw(3, 1, 0, 0);
pass.end();
pass.release();
// Draw
render_pass.setPipeline(game.state().pipeline);
render_pass.draw(3, 1, 0, 0);
// Finish render pass
render_pass.end();
// Submit our commands to the queue
var command = encoder.finish(null);
encoder.release();
defer command.release();
mach.core.queue.submit(&[_]*gpu.CommandBuffer{command});
queue.submit(&[_]*gpu.CommandBuffer{command});
command.release();
// Present the frame
mach.core.swap_chain.present();
back_buffer_view.release();
// update the window title every second
if (game.state().title_timer.read() >= 1.0) {