Вывод текстуры

This commit is contained in:
2025-12-18 19:35:47 +03:00
parent bca66e3815
commit d4a2f41a51
4 changed files with 123 additions and 17 deletions

1
src/Document.zig Normal file
View File

@@ -0,0 +1 @@
// Файл векторного документа

76
src/WindowContext.zig Normal file
View File

@@ -0,0 +1,76 @@
const std = @import("std");
const dvui = @import("dvui");
const Color = dvui.Color;
const WindowContext = @This();
allocator: std.mem.Allocator,
canvas_texture: ?dvui.Texture = null,
canvas_width: u32 = 400,
canvas_height: u32 = 300,
pub fn init(allocator: std.mem.Allocator) WindowContext {
return .{
.allocator = allocator,
};
}
/// Заполнить canvas случайным цветом на CPU
pub fn fillRandomColor(self: *WindowContext) !void {
var prng = std.Random.DefaultPrng.init(@intCast(std.time.microTimestamp()));
const random = prng.random();
// Выделить буфер пиксельных данных
const pixels = try self.allocator.alloc(Color.PMA, @as(usize, self.canvas_width) * self.canvas_height);
defer self.allocator.free(pixels);
// Заполнить случайными цветами
const r = random.int(u8);
const g = random.int(u8);
const b = random.int(u8);
var prev: dvui.Color.PMA = .{
.r = r,
.g = g,
.b = b,
.a = 255,
};
for (pixels) |*pixel| {
const r_delta = random.intRangeAtMost(i16, -1, 1);
const g_delta = random.intRangeAtMost(i16, -1, 1);
const b_delta = random.intRangeAtMost(i16, -1, 1);
const r_new: i16 = @as(i16, prev.r) + r_delta;
const g_new: i16 = @as(i16, prev.g) + g_delta;
const b_new: i16 = @as(i16, prev.b) + b_delta;
pixel.* = .{
.r = @intCast(std.math.clamp(r_new, 0, 255)),
.g = @intCast(std.math.clamp(g_new, 0, 255)),
.b = @intCast(std.math.clamp(b_new, 0, 255)),
.a = 255,
};
prev = pixel.*;
}
// Удалить старую текстуру
if (self.canvas_texture) |tex| {
dvui.Texture.destroyLater(tex);
}
// Создать новую текстуру из пиксельных данных
self.canvas_texture = try dvui.textureCreate(pixels, self.canvas_width, self.canvas_height, .linear);
}
/// Отобразить canvas в UI
pub fn render(self: WindowContext, rect: dvui.Rect.Physical) !void {
if (self.canvas_texture) |texture| {
try dvui.renderTexture(texture, .{ .r = rect }, .{});
}
}
pub fn deinit(self: *WindowContext) void {
if (self.canvas_texture) |texture| {
dvui.Texture.destroyLater(texture);
}
}

View File

@@ -2,6 +2,8 @@ const std = @import("std");
const builtin = @import("builtin");
const dvui = @import("dvui");
const SDLBackend = @import("sdl-backend");
const Document = @import("Document.zig");
const WindowContext = @import("WindowContext.zig");
const sdl_c = SDLBackend.c;
const Allocator = std.mem.Allocator;
const Color = dvui.Color;
@@ -24,9 +26,11 @@ pub fn main() !void {
.dark => dvui.Theme.builtin.adwaita_dark,
},
});
defer win.deinit();
var ctx = WindowContext.init(allocator);
defer ctx.deinit();
var interrupted = false;
main_loop: while (true) {
@@ -44,7 +48,7 @@ pub fn main() !void {
_ = SDLBackend.c.SDL_SetRenderDrawColor(backend.renderer, 0, 0, 0, 255);
_ = SDLBackend.c.SDL_RenderClear(backend.renderer);
const keep_running = gui_frame();
const keep_running = gui_frame(&ctx);
if (!keep_running) break :main_loop;
// marks end of dvui frame, don't call dvui functions after this
@@ -64,7 +68,7 @@ pub fn main() !void {
}
}
fn gui_frame() bool {
fn gui_frame(ctx: *WindowContext) bool {
for (dvui.events()) |*e| {
if (e.evt == .window and e.evt.window.action == .close) return false;
if (e.evt == .app and e.evt.app.action == .quit) return false;
@@ -83,7 +87,11 @@ fn gui_frame() bool {
defer left_panel.deinit();
dvui.label(@src(), "Tools", .{}, .{});
_ = dvui.button(@src(), "Button", .{}, .{});
if (dvui.button(@src(), "Fill Random Color", .{}, .{})) {
ctx.fillRandomColor() catch |err| {
std.debug.print("Error filling canvas: {}\n", .{err});
};
}
}
// Правая панель - занимает оставшееся пространство
@@ -95,6 +103,7 @@ fn gui_frame() bool {
);
defer back.deinit();
{
const fill_color = Color.white.opacity(0.5);
var right_panel = dvui.box(
@src(),
@@ -108,7 +117,26 @@ fn gui_frame() bool {
);
defer right_panel.deinit();
dvui.label(@src(), "Canvas", .{}, .{ .gravity_x = 0.5 });
const overlay = dvui.overlay(@src(), .{
.expand = .both,
});
defer overlay.deinit();
// Отобразить canvas внутри контейнера
if (ctx.canvas_texture) |texture| {
_ = dvui.image(@src(), .{
.source = .{ .texture = texture },
}, .{
.expand = .both,
.min_size_content = .{
.w = @floatFromInt(ctx.canvas_width),
.h = @floatFromInt(ctx.canvas_height),
},
});
}
dvui.label(@src(), "Canvas", .{}, .{ .gravity_x = 0.5, .gravity_y = 0.0 });
}
}
return true;

View File

@@ -0,0 +1 @@
// Интерфейс для рендеринга документа