forked from AuroraMiddleware/gtk
528 lines
13 KiB
C
528 lines
13 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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*
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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 1997-1999. 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 "gdk.h"
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#include "gdkprivate.h"
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#include "gdkx.h"
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static void gdk_visual_add (GdkVisual *visual);
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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 guint gdk_visual_hash (Visual *key);
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static gint gdk_visual_compare (Visual *a,
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Visual *b);
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static GdkVisualPrivate *system_visual;
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static GdkVisualPrivate *visuals;
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static gint nvisuals;
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static gint available_depths[7];
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static gint navailable_depths;
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static GdkVisualType available_types[6];
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static gint navailable_types;
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#ifdef G_ENABLE_DEBUG
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static const gchar* visual_names[] =
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{
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"static gray",
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"grayscale",
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"static color",
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"pseudo color",
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"true color",
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"direct color",
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};
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#endif /* G_ENABLE_DEBUG */
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static GHashTable *visual_hash = NULL;
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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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static const gint possible_depths[7] = { 32, 24, 16, 15, 8, 4, 1 };
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static const GdkVisualType possible_types[6] =
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{
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GDK_VISUAL_DIRECT_COLOR,
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GDK_VISUAL_TRUE_COLOR,
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GDK_VISUAL_PSEUDO_COLOR,
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GDK_VISUAL_STATIC_COLOR,
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GDK_VISUAL_GRAYSCALE,
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GDK_VISUAL_STATIC_GRAY
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};
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static const gint npossible_depths = sizeof(possible_depths)/sizeof(gint);
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static const gint npossible_types = sizeof(possible_types)/sizeof(GdkVisualType);
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int rastercaps, numcolors, sizepalette, colorres, bitspixel;
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Visual *default_xvisual;
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GdkVisualPrivate temp_visual;
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int nxvisuals;
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int i, j;
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nxvisuals = 1;
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visuals = g_new (GdkVisualPrivate, nxvisuals);
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nvisuals = 0;
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for (i = 0; i < nxvisuals; i++)
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{
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if (1)
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{
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bitspixel = GetDeviceCaps (gdk_DC, BITSPIXEL);
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rastercaps = GetDeviceCaps (gdk_DC, RASTERCAPS);
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default_xvisual = g_new (Visual, 1);
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visuals[nvisuals].xvisual = default_xvisual;
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visuals[nvisuals].xvisual->visualid = nvisuals;
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visuals[nvisuals].xvisual->bitspixel = bitspixel;
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if (rastercaps & RC_PALETTE)
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{
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visuals[nvisuals].visual.type = GDK_VISUAL_PSEUDO_COLOR;
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numcolors = GetDeviceCaps (gdk_DC, NUMCOLORS);
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sizepalette = GetDeviceCaps (gdk_DC, SIZEPALETTE);
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colorres = GetDeviceCaps (gdk_DC, COLORRES);
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visuals[nvisuals].xvisual->map_entries = sizepalette;
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}
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else if (bitspixel == 1)
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{
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visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_GRAY;
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visuals[nvisuals].xvisual->map_entries = 2;
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}
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else if (bitspixel == 4)
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{
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visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
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visuals[nvisuals].xvisual->map_entries = 16;
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}
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else if (bitspixel == 8)
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{
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visuals[nvisuals].visual.type = GDK_VISUAL_STATIC_COLOR;
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visuals[nvisuals].xvisual->map_entries = 256;
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}
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else if (bitspixel == 16)
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{
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visuals[nvisuals].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_DC, 1, 1);
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GetDIBits (gdk_DC, hbm, 0, 1, NULL,
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(BITMAPINFO *) &bmi, DIB_RGB_COLORS);
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GetDIBits (gdk_DC, 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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visuals[nvisuals].visual.red_mask = 0x00007C00;
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visuals[nvisuals].visual.green_mask = 0x000003E0;
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visuals[nvisuals].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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visuals[nvisuals].visual.red_mask = bmi.u.fields[0];
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visuals[nvisuals].visual.green_mask = bmi.u.fields[1];
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visuals[nvisuals].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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visuals[nvisuals].visual.red_mask = 0x0000F800;
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visuals[nvisuals].visual.green_mask = 0x000007E0;
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visuals[nvisuals].visual.blue_mask = 0x0000001F;
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#else
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visuals[nvisuals].visual.red_mask = 0x00007C00;
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visuals[nvisuals].visual.green_mask = 0x000003E0;
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visuals[nvisuals].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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visuals[nvisuals].visual.type = GDK_VISUAL_TRUE_COLOR;
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visuals[nvisuals].visual.red_mask = 0x00FF0000;
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visuals[nvisuals].visual.green_mask = 0x0000FF00;
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visuals[nvisuals].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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visuals[nvisuals].visual.depth = bitspixel;
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visuals[nvisuals].visual.byte_order = GDK_LSB_FIRST;
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visuals[nvisuals].visual.bits_per_rgb = 42; /* Not used? */
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if ((visuals[nvisuals].visual.type == GDK_VISUAL_TRUE_COLOR) ||
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(visuals[nvisuals].visual.type == GDK_VISUAL_DIRECT_COLOR))
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{
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gdk_visual_decompose_mask (visuals[nvisuals].visual.red_mask,
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&visuals[nvisuals].visual.red_shift,
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&visuals[nvisuals].visual.red_prec);
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gdk_visual_decompose_mask (visuals[nvisuals].visual.green_mask,
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&visuals[nvisuals].visual.green_shift,
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&visuals[nvisuals].visual.green_prec);
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gdk_visual_decompose_mask (visuals[nvisuals].visual.blue_mask,
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&visuals[nvisuals].visual.blue_shift,
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&visuals[nvisuals].visual.blue_prec);
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visuals[nvisuals].xvisual->map_entries =
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1 << (MAX (visuals[nvisuals].visual.red_prec,
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MAX (visuals[nvisuals].visual.green_prec,
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visuals[nvisuals].visual.blue_prec)));
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}
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else
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{
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visuals[nvisuals].visual.red_mask = 0;
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visuals[nvisuals].visual.red_shift = 0;
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visuals[nvisuals].visual.red_prec = 0;
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visuals[nvisuals].visual.green_mask = 0;
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visuals[nvisuals].visual.green_shift = 0;
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visuals[nvisuals].visual.green_prec = 0;
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visuals[nvisuals].visual.blue_mask = 0;
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visuals[nvisuals].visual.blue_shift = 0;
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visuals[nvisuals].visual.blue_prec = 0;
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}
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visuals[nvisuals].visual.colormap_size = visuals[nvisuals].xvisual->map_entries;
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nvisuals += 1;
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}
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}
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for (i = 0; i < nvisuals; i++)
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{
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for (j = i+1; j < nvisuals; j++)
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{
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if (visuals[j].visual.depth >= visuals[i].visual.depth)
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{
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if ((visuals[j].visual.depth == 8) && (visuals[i].visual.depth == 8))
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{
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if (visuals[j].visual.type == GDK_VISUAL_PSEUDO_COLOR)
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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else if ((visuals[i].visual.type != GDK_VISUAL_PSEUDO_COLOR) &&
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visuals[j].visual.type > visuals[i].visual.type)
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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}
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else if ((visuals[j].visual.depth > visuals[i].visual.depth) ||
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((visuals[j].visual.depth == visuals[i].visual.depth) &&
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(visuals[j].visual.type > visuals[i].visual.type)))
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{
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temp_visual = visuals[j];
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visuals[j] = visuals[i];
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visuals[i] = temp_visual;
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}
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}
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}
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}
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for (i = 0; i < nvisuals; i++)
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if (default_xvisual->visualid == visuals[i].xvisual->visualid)
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{
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system_visual = &visuals[i];
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break;
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}
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navailable_depths = 0;
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for (i = 0; i < npossible_depths; i++)
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{
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for (j = 0; j < nvisuals; j++)
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{
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if (visuals[j].visual.depth == possible_depths[i])
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{
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available_depths[navailable_depths++] = visuals[j].visual.depth;
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break;
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}
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}
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}
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if (navailable_depths == 0)
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g_error ("unable to find a usable depth");
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navailable_types = 0;
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for (i = 0; i < npossible_types; i++)
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{
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for (j = 0; j < nvisuals; j++)
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{
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if (visuals[j].visual.type == possible_types[i])
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{
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available_types[navailable_types++] = visuals[j].visual.type;
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break;
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}
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}
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}
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for (i = 0; i < nvisuals; i++)
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gdk_visual_add ((GdkVisual*) &visuals[i]);
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if (npossible_types == 0)
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g_error ("unable to find a usable visual type");
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}
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GdkVisual*
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gdk_visual_ref (GdkVisual *visual)
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{
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return visual;
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}
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void
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gdk_visual_unref (GdkVisual *visual)
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{
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return;
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}
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gint
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gdk_visual_get_best_depth (void)
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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_visual_get_best_type (void)
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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_visual_get_system (void)
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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_visual_get_best (void)
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{
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return ((GdkVisual*) &(visuals[0]));
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}
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GdkVisual*
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gdk_visual_get_best_with_depth (gint depth)
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{
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < nvisuals; i++)
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if (depth == visuals[i].visual.depth)
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{
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return_val = (GdkVisual*) &(visuals[i]);
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break;
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}
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return return_val;
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}
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GdkVisual*
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gdk_visual_get_best_with_type (GdkVisualType visual_type)
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{
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < nvisuals; i++)
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if (visual_type == visuals[i].visual.type)
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{
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return_val = (GdkVisual*) &(visuals[i]);
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break;
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}
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return return_val;
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}
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GdkVisual*
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gdk_visual_get_best_with_both (gint depth,
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GdkVisualType visual_type)
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{
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GdkVisual *return_val;
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int i;
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return_val = NULL;
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for (i = 0; i < nvisuals; i++)
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if ((depth == visuals[i].visual.depth) &&
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(visual_type == visuals[i].visual.type))
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{
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return_val = (GdkVisual*) &(visuals[i]);
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break;
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}
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return return_val;
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}
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void
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gdk_query_depths (gint **depths,
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gint *count)
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{
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*count = navailable_depths;
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*depths = available_depths;
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}
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void
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gdk_query_visual_types (GdkVisualType **visual_types,
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gint *count)
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{
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*count = navailable_types;
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*visual_types = available_types;
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}
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GList*
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gdk_list_visuals (void)
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{
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GList *list;
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guint i;
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list = NULL;
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for (i = 0; i < nvisuals; ++i)
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list = g_list_append (list, (gpointer) &visuals[i]);
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return list;
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}
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GdkVisual*
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gdk_visual_lookup (Visual *xvisual)
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{
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GdkVisual *visual;
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if (!visual_hash)
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return NULL;
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visual = g_hash_table_lookup (visual_hash, xvisual);
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return visual;
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}
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GdkVisual*
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gdkx_visual_get (VisualID xvisualid)
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{
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int i;
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for (i = 0; i < nvisuals; i++)
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if (xvisualid == visuals[i].xvisual->visualid)
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return (GdkVisual*) &visuals[i];
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return NULL;
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}
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static void
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gdk_visual_add (GdkVisual *visual)
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{
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GdkVisualPrivate *private;
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if (!visual_hash)
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visual_hash = g_hash_table_new ((GHashFunc) gdk_visual_hash,
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(GCompareFunc) gdk_visual_compare);
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private = (GdkVisualPrivate*) visual;
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g_hash_table_insert (visual_hash, private->xvisual, 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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/* This hash stuff is pretty useless on Windows, as there is only
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one visual... */
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static guint
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gdk_visual_hash (Visual *key)
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{
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return key->visualid;
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}
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static gint
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gdk_visual_compare (Visual *a,
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Visual *b)
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{
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return (a->visualid == b->visualid);
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}
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