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fix(win32): cell size calculation and don't recalculate as often

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This commit is contained in:
CJ van den Berg 2025-01-04 17:37:52 +01:00
parent 68d2c4d053
commit 3d0bc59b0c
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
1 changed files with 10 additions and 18 deletions
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28
src/win32/gui.zig
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@ -211,6 +211,7 @@ const State = struct {
erase_bg_done: bool = false,
text_format_editor: ddui.TextFormatCache(Dpi, createTextFormatEditor) = .{},
scroll_delta: isize = 0,
cell_size: XY(i32) = .{ .x = 0, .y = 0 },
// these fields should only be accessed inside the global mutex
shared_screen_arena: std.heap.ArenaAllocator,
@ -236,15 +237,14 @@ fn stateFromHwnd(hwnd: win32.HWND) *State {
fn paint(
d2d: *const D2d,
dpi: u32,
screen: *const vaxis.Screen,
text_format_editor: *win32.IDWriteTextFormat,
cell_size: XY(i32),
) void {
{
const color = ddui.rgb8(31, 31, 31);
d2d.target.ID2D1RenderTarget.Clear(&color);
}
const cell_size = getCellSize(dpi, text_format_editor);
for (0..screen.height) |y| {
const row_y = cell_size.y * @as(i32, @intCast(y));
for (0..screen.width) |x| {
@ -421,29 +421,25 @@ pub fn updateScreen(screen: *const vaxis.Screen) bool {
}
fn getCellSize(
dpi: u32,
text_format_editor: *win32.IDWriteTextFormat,
) XY(i32) {
const metrics = getTextFormatMetrics(text_format_editor);
// TODO: get the actual font metrics
const font_size = text_format_editor.GetFontSize();
const pixels_per_design_unit: f32 = font_size / @as(f32, @floatFromInt(metrics.designUnitsPerEm));
const width: f32 = getTextFormatWidth(text_format_editor);
const width_scaled: i32 = @intFromFloat(@ceil(win32.scaleDpi(f32, width, dpi)));
const ascent = @as(f32, @floatFromInt(metrics.ascent)) * pixels_per_design_unit;
const descent = @as(f32, @floatFromInt(metrics.descent)) * pixels_per_design_unit;
const height: f32 = ascent + descent;
const height_scaled: i32 = @intFromFloat(@ceil(win32.scaleDpi(f32, height, dpi)));
// std.log.info(
// "CellSize font_size={d} size={d}x{d} scaled-size={}x{}",
// .{ font_size, width, height, width_scaled, height_scaled },
// "CellSize font_size={d} size={d}x{d}",
// .{ font_size, width, height },
// );
return .{
.x = width_scaled,
.y = height_scaled,
.x = @intFromFloat(width),
.y = @intFromFloat(height),
};
}
@ -570,9 +566,7 @@ fn sendMouse(
) void {
const point = ddui.pointFromLparam(lparam);
const state = stateFromHwnd(hwnd);
const dpi = win32.dpiFromHwnd(hwnd);
const text_format = state.text_format_editor.getOrCreate(Dpi{ .value = dpi });
const cell_size = getCellSize(dpi, text_format);
const cell_size = state.cell_size;
const cell = cellFromPos(cell_size, point.x, point.y);
const cell_offset = cellOffsetFromPos(cell_size, point.x, point.y);
switch (kind) {
@ -612,9 +606,7 @@ fn sendMouseWheel(
) void {
const point = ddui.pointFromLparam(lparam);
const state = stateFromHwnd(hwnd);
const dpi = win32.dpiFromHwnd(hwnd);
const text_format = state.text_format_editor.getOrCreate(Dpi{ .value = dpi });
const cell_size = getCellSize(dpi, text_format);
const cell_size = state.cell_size;
const cell = cellFromPos(cell_size, point.x, point.y);
const cell_offset = cellOffsetFromPos(cell_size, point.x, point.y);
// const fwKeys = win32.loword(wparam);
@ -823,9 +815,9 @@ fn WndProc(
defer global.mutex.unlock();
paint(
&state.maybe_d2d.?,
dpi,
&state.shared_screen,
state.text_format_editor.getOrCreate(Dpi{ .value = dpi }),
state.cell_size,
);
}
@ -859,9 +851,9 @@ fn WndProc(
);
}
const single_cell_size = getCellSize(
dpi,
state.text_format_editor.getOrCreate(Dpi{ .value = @intCast(dpi) }),
);
state.cell_size = single_cell_size;
const client_cell_size: XY(u16) = .{
.x = @intCast(@divTrunc(client_pixel_size.x, single_cell_size.x)),
.y = @intCast(@divTrunc(client_pixel_size.y, single_cell_size.y)),