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renderer: minimize initial size of GPU resources

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These will all be resized anyway on the first frame, so there's no point
in preallocating sizes that will be too small.
This commit is contained in:
Qwerasd
2025-06-20 15:02:58 -06:00
parent 2f10caec8f
commit 9d00018f8b
1 changed files with 15 additions and 8 deletions
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23
src/renderer/generic.zig
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@@ -300,23 +300,30 @@ pub fn Renderer(comptime GraphicsAPI: type) type {
var uniforms = try UniformBuffer.init(api.uniformBufferOptions(), 1);
errdefer uniforms.deinit();
// Create the buffers for our vertex data. The preallocation size
// is likely too small but our first frame update will resize it.
var cells = try CellTextBuffer.init(api.fgBufferOptions(), 10 * 10);
// Create GPU buffers for our cells.
//
// We start them off with a size of 1, which will of course be
// too small, but they will be resized as needed. This is a bit
// wasteful but since it's a one-time thing it's not really a
// huge concern.
var cells = try CellTextBuffer.init(api.fgBufferOptions(), 1);
errdefer cells.deinit();
var cells_bg = try CellBgBuffer.init(api.bgBufferOptions(), 10 * 10);
var cells_bg = try CellBgBuffer.init(api.bgBufferOptions(), 1);
errdefer cells_bg.deinit();
// Initialize our textures for our font atlas.
//
// As with the buffers above, we start these off as small
// as possible since they'll inevitably be resized anyway.
const grayscale = try api.initAtlasTexture(&.{
.data = undefined,
.size = 8,
.size = 1,
.format = .grayscale,
});
errdefer grayscale.deinit();
const color = try api.initAtlasTexture(&.{
.data = undefined,
.size = 8,
.size = 1,
.format = .rgba,
});
errdefer color.deinit();
@@ -328,8 +335,8 @@ pub fn Renderer(comptime GraphicsAPI: type) type {
null;
errdefer if (custom_shader_state) |*state| state.deinit();
// Initialize the target at 1x1 px, this is slightly
// wasteful but it's only done once so whatever.
// Initialize the target. Just as with the other resources,
// start it off as small as we can since it'll be resized.
const target = try api.initTarget(1, 1);
return .{