347 lines
8.5 KiB
C
347 lines
8.5 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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* Copyright (C) 1998-2002 Tor Lillqvist
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include "gdkvisual.h"
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#include "gdkscreen.h" /* gdk_screen_get_default() */
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#include "gdkprivate-win32.h"
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#include "gdkvisualprivate.h"
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static void gdk_visual_decompose_mask (gulong mask,
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gint *shift,
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gint *prec);
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static GdkVisual *system_visual = NULL;
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static gint available_depths[1];
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static GdkVisualType available_types[1];
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void
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_gdk_visual_init (void)
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{
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struct
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{
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BITMAPINFOHEADER bi;
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union
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{
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RGBQUAD colors[256];
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DWORD fields[256];
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} u;
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} bmi;
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HBITMAP hbm;
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const gint rastercaps = GetDeviceCaps (_gdk_display_hdc, RASTERCAPS);
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const int numcolors = GetDeviceCaps (_gdk_display_hdc, NUMCOLORS);
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gint bitspixel = GetDeviceCaps (_gdk_display_hdc, BITSPIXEL);
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gint map_entries = 0;
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system_visual = g_object_new (GDK_TYPE_VISUAL, NULL);
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system_visual->screen = gdk_screen_get_default();
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if (rastercaps & RC_PALETTE)
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{
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const int sizepalette = GetDeviceCaps (_gdk_display_hdc, SIZEPALETTE);
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gchar *max_colors = getenv ("GDK_WIN32_MAX_COLORS");
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system_visual->type = GDK_VISUAL_PSEUDO_COLOR;
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g_assert (sizepalette == 256);
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if (max_colors != NULL)
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_gdk_max_colors = atoi (max_colors);
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map_entries = _gdk_max_colors;
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if (map_entries >= 16 && map_entries < sizepalette)
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{
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if (map_entries < 32)
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{
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map_entries = 16;
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system_visual->type = GDK_VISUAL_STATIC_COLOR;
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bitspixel = 4;
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}
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else if (map_entries < 64)
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{
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map_entries = 32;
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bitspixel = 5;
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}
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else if (map_entries < 128)
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{
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map_entries = 64;
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bitspixel = 6;
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}
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else if (map_entries < 256)
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{
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map_entries = 128;
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bitspixel = 7;
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}
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else
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g_assert_not_reached ();
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}
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else
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map_entries = sizepalette;
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}
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else if (bitspixel == 1 && numcolors == 16)
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{
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bitspixel = 4;
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system_visual->type = GDK_VISUAL_STATIC_COLOR;
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map_entries = 16;
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}
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else if (bitspixel == 1)
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{
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system_visual->type = GDK_VISUAL_STATIC_GRAY;
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map_entries = 2;
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}
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else if (bitspixel == 4)
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{
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system_visual->type = GDK_VISUAL_STATIC_COLOR;
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map_entries = 16;
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}
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else if (bitspixel == 8)
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{
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system_visual->type = GDK_VISUAL_STATIC_COLOR;
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map_entries = 256;
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}
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else if (bitspixel == 16)
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{
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system_visual->type = GDK_VISUAL_TRUE_COLOR;
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#if 1
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/* This code by Mike Enright,
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* see http://www.users.cts.com/sd/m/menright/display.html
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*/
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memset (&bmi, 0, sizeof (bmi));
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bmi.bi.biSize = sizeof (bmi.bi);
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hbm = CreateCompatibleBitmap (_gdk_display_hdc, 1, 1);
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GetDIBits (_gdk_display_hdc, hbm, 0, 1, NULL,
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(BITMAPINFO *) &bmi, DIB_RGB_COLORS);
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GetDIBits (_gdk_display_hdc, hbm, 0, 1, NULL,
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(BITMAPINFO *) &bmi, DIB_RGB_COLORS);
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DeleteObject (hbm);
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if (bmi.bi.biCompression != BI_BITFIELDS)
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{
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/* Either BI_RGB or BI_RLE_something
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* .... or perhaps (!!) something else.
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* Theoretically biCompression might be
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* mmioFourCC('c','v','i','d') but I doubt it.
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*/
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if (bmi.bi.biCompression == BI_RGB)
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{
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/* It's 555 */
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bitspixel = 15;
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system_visual->red_mask = 0x00007C00;
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system_visual->green_mask = 0x000003E0;
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system_visual->blue_mask = 0x0000001F;
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}
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else
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{
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g_assert_not_reached ();
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}
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}
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else
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{
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DWORD allmasks =
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bmi.u.fields[0] | bmi.u.fields[1] | bmi.u.fields[2];
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int k = 0;
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while (allmasks)
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{
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if (allmasks&1)
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k++;
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allmasks/=2;
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}
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bitspixel = k;
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system_visual->red_mask = bmi.u.fields[0];
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system_visual->green_mask = bmi.u.fields[1];
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system_visual->blue_mask = bmi.u.fields[2];
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}
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#else
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/* Old, incorrect (but still working) code. */
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#if 0
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system_visual->red_mask = 0x0000F800;
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system_visual->green_mask = 0x000007E0;
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system_visual->blue_mask = 0x0000001F;
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#else
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system_visual->red_mask = 0x00007C00;
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system_visual->green_mask = 0x000003E0;
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system_visual->blue_mask = 0x0000001F;
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#endif
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#endif
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}
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else if (bitspixel == 24 || bitspixel == 32)
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{
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bitspixel = 24;
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system_visual->type = GDK_VISUAL_TRUE_COLOR;
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system_visual->red_mask = 0x00FF0000;
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system_visual->green_mask = 0x0000FF00;
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system_visual->blue_mask = 0x000000FF;
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}
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else
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g_error ("_gdk_visual_init: unsupported BITSPIXEL: %d\n", bitspixel);
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system_visual->depth = bitspixel;
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system_visual->byte_order = GDK_LSB_FIRST;
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system_visual->bits_per_rgb = 42; /* Not used? */
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if ((system_visual->type == GDK_VISUAL_TRUE_COLOR) ||
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(system_visual->type == GDK_VISUAL_DIRECT_COLOR))
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{
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gdk_visual_decompose_mask (system_visual->red_mask,
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&system_visual->red_shift,
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&system_visual->red_prec);
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gdk_visual_decompose_mask (system_visual->green_mask,
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&system_visual->green_shift,
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&system_visual->green_prec);
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gdk_visual_decompose_mask (system_visual->blue_mask,
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&system_visual->blue_shift,
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&system_visual->blue_prec);
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map_entries = 1 << (MAX (system_visual->red_prec,
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MAX (system_visual->green_prec,
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system_visual->blue_prec)));
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}
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else
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{
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system_visual->red_mask = 0;
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system_visual->red_shift = 0;
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system_visual->red_prec = 0;
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system_visual->green_mask = 0;
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system_visual->green_shift = 0;
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system_visual->green_prec = 0;
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system_visual->blue_mask = 0;
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system_visual->blue_shift = 0;
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system_visual->blue_prec = 0;
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}
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system_visual->colormap_size = map_entries;
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available_depths[0] = system_visual->depth;
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available_types[0] = system_visual->type;
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}
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gint
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_gdk_win32_screen_visual_get_best_depth (GdkScreen *screen)
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{
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return available_depths[0];
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}
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GdkVisualType
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_gdk_win32_screen_visual_get_best_type (GdkScreen *screen)
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{
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return available_types[0];
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}
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GdkVisual*
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_gdk_win32_screen_get_system_visual (GdkScreen *screen)
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{
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return system_visual;
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}
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GdkVisual*
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_gdk_win32_screen_visual_get_best (GdkScreen *screen)
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{
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return ((GdkVisual*) system_visual);
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}
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GdkVisual*
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_gdk_win32_screen_visual_get_best_with_depth (GdkScreen *screen, gint depth)
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{
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if (depth == system_visual->depth)
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return (GdkVisual*) system_visual;
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else
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return NULL;
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}
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GdkVisual*
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_gdk_win32_screen_visual_get_best_with_type (GdkScreen *screen, GdkVisualType visual_type)
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{
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if (visual_type == system_visual->type)
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return system_visual;
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else
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return NULL;
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}
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GdkVisual*
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_gdk_win32_screen_visual_get_best_with_both (GdkScreen *screen,
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gint depth,
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GdkVisualType visual_type)
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{
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if ((depth == system_visual->depth) && (visual_type == system_visual->type))
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return system_visual;
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else
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return NULL;
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}
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void
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_gdk_win32_screen_query_depths (GdkScreen *screen,
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gint **depths,
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gint *count)
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{
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*count = 1;
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*depths = available_depths;
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}
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void
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_gdk_win32_screen_query_visual_types (GdkScreen *screen,
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GdkVisualType **visual_types,
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gint *count)
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{
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*count = 1;
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*visual_types = available_types;
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}
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GList*
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_gdk_win32_screen_list_visuals (GdkScreen *screen)
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{
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return g_list_append (NULL, (gpointer) system_visual);
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}
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static void
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gdk_visual_decompose_mask (gulong mask,
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gint *shift,
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gint *prec)
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{
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*shift = 0;
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*prec = 0;
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while (!(mask & 0x1))
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{
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(*shift)++;
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mask >>= 1;
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}
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while (mask & 0x1)
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{
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(*prec)++;
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mask >>= 1;
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}
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}
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