Merge branch 'add_gears_matrix'
This commit is contained in:
commit
564fae8934
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@ -16,6 +16,7 @@ return
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wallpaper = require("gears.wallpaper");
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timer = require("gears.timer");
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cache = require("gears.cache");
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matrix = require("gears.matrix");
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}
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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@ -0,0 +1,59 @@
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---------------------------------------------------------------------------
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-- @author Uli Schlachter
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-- @copyright 2015 Uli Schlachter
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-- @release @AWESOME_VERSION@
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-- @module gears.matrix
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---------------------------------------------------------------------------
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local cairo = require("lgi").cairo
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local debug = require("gears.debug")
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local matrix = {}
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--- Copy a cairo matrix
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-- @param matrix The matrix to copy.
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-- @return A copy of the given cairo matrix.
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function matrix.copy(matrix)
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debug.assert(cairo.Matrix:is_type_of(matrix), "Argument should be a cairo matrix")
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local ret = cairo.Matrix()
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ret:init(matrix.xx, matrix.yx, matrix.xy, matrix.yy, matrix.x0, matrix.y0)
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return ret
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end
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--- Check if two cairo matrices are equal
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-- @param m1 The first matrix to compare with.
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-- @param m2 The second matrix to compare with.
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-- @return True if they are equal.
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function matrix.equals(m1, m2)
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for _, k in pairs{ "xx", "xy", "yx", "yy", "x0", "y0" } do
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if m1[k] ~= m2[k] then
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return false
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end
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end
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return true
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end
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--- Calculate a bounding rectangle for transforming a rectangle by a matrix.
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-- @param matrix The cairo matrix that describes the transformation.
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-- @param x The x coordinate of the rectangle.
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-- @param y The y coordinate of the rectangle.
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-- @param width The width of the rectangle.
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-- @param height The height of the rectangle.
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-- @return The x, y, width and height of the bounding rectangle.
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function matrix.transform_rectangle(matrix, x, y, width, height)
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-- Transform all four corners of the rectangle
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local x1, y1 = matrix:transform_point(x, y)
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local x2, y2 = matrix:transform_point(x, y + height)
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local x3, y3 = matrix:transform_point(x + width, y + height)
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local x4, y4 = matrix:transform_point(x + width, y)
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-- Find the extremal points of the result
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local x = math.min(x1, x2, x3, x4)
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local y = math.min(y1, y2, y3, y4)
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local width = math.max(x1, x2, x3, x4) - x
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local height = math.max(y1, y2, y3, y4) - y
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return x, y, width, height
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end
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return matrix
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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@ -5,30 +5,13 @@
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-- @classmod wibox.layout.base
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---------------------------------------------------------------------------
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local pairs = pairs
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local xpcall = xpcall
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local print = print
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local min = math.min
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local max = math.max
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local cairo = require("lgi").cairo
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local wbase = require("wibox.widget.base")
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local base = {}
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--- Figure out the geometry in device coordinate space. This gives only tight
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-- bounds if no rotations by non-multiples of 90° are used.
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function base.rect_to_device_geometry(cr, x, y, width, height)
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local x1, y1 = cr:user_to_device(x, y)
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local x2, y2 = cr:user_to_device(x, y + height)
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local x3, y3 = cr:user_to_device(x + width, y + height)
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local x4, y4 = cr:user_to_device(x + width, y)
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local x = min(x1, x2, x3, x4)
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local y = min(y1, y2, y3, y4)
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local width = max(x1, x2, x3, x4) - x
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local height = max(y1, y2, y3, y4) - y
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return x, y, width, height
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end
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--- Fit a widget for the given available width and height
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-- @param context The context in which we are fit.
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-- @param widget The widget to fit (this uses widget:fit(width, height)).
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@ -85,7 +68,7 @@ function base.draw_widget(context, cr, widget, x, y, width, height)
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end
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-- Register the widget for input handling
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context:widget_at(widget, base.rect_to_device_geometry(cr, 0, 0, width, height))
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context:widget_at(widget, wbase.rect_to_device_geometry(cr, 0, 0, width, height))
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cr:restore()
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end
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@ -8,6 +8,7 @@
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local debug = require("gears.debug")
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local object = require("gears.object")
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local cache = require("gears.cache")
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local matrix = require("gears.matrix")
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local setmetatable = setmetatable
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local pairs = pairs
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local type = type
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@ -15,6 +16,12 @@ local table = table
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local base = {}
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--- Figure out the geometry in device coordinate space. This gives only tight
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-- bounds if no rotations by non-multiples of 90° are used.
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function base.rect_to_device_geometry(cr, x, y, width, height)
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return matrix.transform_rectangle(cr.matrix, x, y, width, height)
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end
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--- Set/get a widget's buttons
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function base:buttons(_buttons)
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if _buttons then
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@ -6,7 +6,6 @@
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---------------------------------------------------------------------------
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local wbase = require("wibox.widget.base")
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local lbase = require("wibox.layout.base")
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local beautiful = require("beautiful")
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local capi = { awesome = awesome }
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local setmetatable = setmetatable
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@ -20,7 +19,7 @@ local base_size = nil
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local reverse = false
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function systray:draw(context, cr, width, height)
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local x, y, _, _ = lbase.rect_to_device_geometry(cr, 0, 0, width, height)
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local x, y, _, _ = wbase.rect_to_device_geometry(cr, 0, 0, width, height)
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local num_entries = capi.awesome.systray()
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local bg = beautiful.bg_systray or beautiful.bg_normal or "#000000"
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local spacing = beautiful.systray_icon_spacing or 0
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@ -0,0 +1,82 @@
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---------------------------------------------------------------------------
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-- @author Uli Schlachter
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-- @copyright 2015 Uli Schlachter
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---------------------------------------------------------------------------
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local matrix = require("gears.matrix")
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local cairo = require("lgi").cairo
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describe("gears.matrix", function()
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describe("copy", function()
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it("Test copy", function()
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local m1 = cairo.Matrix()
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m1:init(1, 2, 3, 4, 5, 6)
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local m2 = matrix.copy(m1)
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assert.is.equal(m1.xx, m2.xx)
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assert.is.equal(m1.xy, m2.xy)
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assert.is.equal(m1.yx, m2.yx)
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assert.is.equal(m1.yy, m2.yy)
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assert.is.equal(m1.x0, m2.x0)
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assert.is.equal(m1.y0, m2.y0)
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m1.x0 = 42
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assert.is_not.equal(m1.x0, m2.x0)
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end)
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end)
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describe("equals", function()
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it("Same matrix", function()
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local m = cairo.Matrix.create_rotate(1)
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assert.is_true(matrix.equals(m, m))
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end)
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it("Different matrix equals", function()
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local m1 = cairo.Matrix.create_rotate(1)
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local m2 = cairo.Matrix.create_rotate(1)
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assert.is_true(matrix.equals(m1, m2))
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end)
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it("Different matrix unequal", function()
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local m1 = cairo.Matrix()
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local m2 = cairo.Matrix()
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m1:init(1, 2, 3, 4, 5, 6)
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m2:init(1, 2, 3, 4, 5, 0)
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assert.is_false(matrix.equals(m1, m2))
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end)
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end)
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describe("transform_rectangle", function()
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local function round(n)
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return math.floor(n + 0.5)
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end
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local function test(m, x, y, width, height,
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expected_x, expected_y, expected_width, expected_height)
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local actual_x, actual_y, actual_width, actual_height =
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matrix.transform_rectangle(m, x, y, width, height)
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assert.is.equal(round(actual_x), expected_x)
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assert.is.equal(round(actual_y), expected_y)
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assert.is.equal(round(actual_width), expected_width)
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assert.is.equal(round(actual_height), expected_height)
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-- Stupid rounding issues...
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assert.is_true(math.abs(round(actual_x) - actual_x) < 0.00000001)
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assert.is_true(math.abs(round(actual_y) - actual_y) < 0.00000001)
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assert.is_true(math.abs(round(actual_width) - actual_width) < 0.00000001)
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assert.is_true(math.abs(round(actual_height) - actual_height) < 0.00000001)
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end
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it("Identity matrix", function()
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test(cairo.Matrix.create_identity(), 1, 2, 3, 4, 1, 2, 3, 4)
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end)
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it("Rotate 180", function()
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test(cairo.Matrix.create_rotate(math.pi),
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1, 2, 3, 4, -4, -6, 3, 4)
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end)
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it("Rotate 90", function()
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test(cairo.Matrix.create_rotate(math.pi / 2),
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1, 2, 3, 4, -6, 1, 4, 3)
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end)
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end)
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end)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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