41 lines
1.4 KiB
Ada
41 lines
1.4 KiB
Ada
--
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-- Copyright (C) 2015-2016 secunet Security Networks AG
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; version 2 of the License.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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with HW.MMIO_Range;
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pragma Elaborate_All (HW.MMIO_Range);
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package body HW.GFX.Framebuffer_Filler
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is
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type FB_Index is new Natural range
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0 .. Natural (Width_Type'Last * Height_Type'Last) - 1;
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type FB_Range is array (FB_Index) of Word32 with Pack;
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package FB is new MMIO_Range (0, Word32, FB_Index, FB_Range);
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procedure Fill (Linear_FB : Word64; Framebuffer : Framebuffer_Type)
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is
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Line_Start : Int32 := 0;
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begin
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FB.Set_Base_Address (Linear_FB);
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for Line in 0 .. Framebuffer.Height - 1 loop
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pragma Loop_Invariant (Line_Start = Line * Framebuffer.Stride);
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for Col in 0 .. Framebuffer.Width - 1 loop
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pragma Loop_Invariant (Line_Start = Line * Framebuffer.Stride);
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FB.Write (FB_Index (Line_Start + Col), 16#ff000000#);
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end loop;
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Line_Start := Line_Start + Framebuffer.Stride;
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end loop;
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end Fill;
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end HW.GFX.Framebuffer_Filler;
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