x11 implementation
This commit is contained in:
Thomas Bernard
256
src/x11screen.c
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256
src/x11screen.c
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/* vim:expandtab:ts=2 sw=2:
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*/
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/* Grafx2 - The Ultimate 256-color bitmap paint program
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Copyright 2018 Thomas Bernard
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Copyright 2008 Yves Rizoud
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Copyright 2007 Adrien Destugues
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Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
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Grafx2 is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2
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of the License.
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Grafx2 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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You should have received a copy of the GNU General Public License
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along with Grafx2; if not, see <http://www.gnu.org/licenses/>
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include "screen.h"
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#include "gfx2surface.h"
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Display * X11_display = NULL;
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static Window X11_window = 0;
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static XImage * X11_image = NULL;
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static char * image_pixels = NULL;
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static XTextProperty windowName;
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static GC X11_gc = 0;
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static T_GFX2_Surface * screen = NULL;
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void GFX2_Set_mode(int *width, int *height, int fullscreen)
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{
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int s;
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int depth;
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unsigned long white, black;
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char * winName[] = { "GrafX2" };
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Visual * visual;
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const char blank_data[1] = { 0 };
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Pixmap blank;
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Cursor cursor;
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XColor dummy;
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if (X11_display == NULL)
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X11_display = XOpenDisplay(NULL);//getenv("DISPLAY")
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if (X11_display == NULL)
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{
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fprintf(stderr, "X11: cannot open display\n");
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exit(1);
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}
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s = DefaultScreen(X11_display);
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black = BlackPixel(X11_display, s);
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white = WhitePixel(X11_display, s);
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visual = DefaultVisual(X11_display, s);
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{
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int i;
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int count = 0;
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int * depths = XListDepths(X11_display, s, &count);
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printf("DefaultDepth = %d, DisplayPlanes = %d\n", DefaultDepth(X11_display, s), DisplayPlanes(X11_display, s));
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if (depths != NULL)
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{
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for (i = 0; i < count; i++)
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printf(" %d", depths[i]);
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printf("\n");
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XFree(depths);
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}
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}
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depth = DisplayPlanes(X11_display, s);
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X11_window = XCreateSimpleWindow(X11_display, RootWindow(X11_display, s),
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0, 0, *width, *height, 0, white, black);
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// create blank 1x1 pixmap to make a 1x1 transparent cursor
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blank = XCreateBitmapFromData(X11_display, X11_window, blank_data, 1, 1);
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cursor = XCreatePixmapCursor(X11_display, blank, blank, &dummy, &dummy, 0, 0);
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//cursor = XCreateFontCursor(X11_display, 130 /*XC_tcross*/);
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XDefineCursor(X11_display, X11_window, cursor);
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XFreePixmap(X11_display, blank);
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XFreeCursor(X11_display, cursor);
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X11_gc = XCreateGC(X11_display, X11_window, 0, NULL);
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XSetFunction(X11_display, X11_gc, GXcopy);
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XStringListToTextProperty(winName, 1, &windowName);
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XSetWMName(X11_display, X11_window, &windowName);
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// TODO : set icon
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screen = New_GFX2_Surface(*width, *height);
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memset(screen->pixels, 0, *width * *height);
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image_pixels = malloc(*height * *width * 4);
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memset(image_pixels, 64, *height * *width * 4);
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#if 0
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{
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int i;
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for (i= 3*8; i < (*height * *width * 4); i += *width * 4)
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{
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image_pixels[i+0] = 0; // B
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image_pixels[i+1] = 0; // G
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image_pixels[i+2] = 0; // R
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}
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}
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#endif
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X11_image = XCreateImage(X11_display, visual, depth,
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ZPixmap, 0, image_pixels, *width, *height,
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32, 0/**width * 4*/);
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if(X11_image == NULL)
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{
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fprintf(stderr, "XCreateImage failed\n");
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exit(1);
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}
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XSelectInput(X11_display, X11_window,
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PointerMotionMask | ButtonPressMask | ButtonReleaseMask | KeyPressMask | ExposureMask | StructureNotifyMask);
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XMapWindow(X11_display, X11_window);
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XFlush(X11_display);
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}
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byte Get_Screen_pixel(int x, int y)
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{
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if(screen == NULL) return 0;
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return screen->pixels[x + y * screen->w];
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}
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void Set_Screen_pixel(int x, int y, byte value)
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{
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if(screen == NULL) return;
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screen->pixels[x + y * screen->w] = value;
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}
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byte* Get_Screen_pixel_ptr(int x, int y)
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{
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if(screen == NULL) return NULL;
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return screen->pixels + x + y * screen->w;
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}
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void Screen_FillRect(int x, int y, int w, int h, byte color)
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{
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int i;
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byte * ptr;
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if (x < 0)
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{
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w += x;
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x = 0;
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}
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if (y < 0)
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{
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h += y;
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y = 0;
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}
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if (x > screen->w || y > screen->h)
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return;
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if ((x + w) > screen->w)
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w = screen->w - x;
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if ((y + h) > screen->h)
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h = screen->h - y;
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if (w <= 0 || h <= 0)
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return;
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for (i = 0; i < h; i++)
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{
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ptr = Get_Screen_pixel_ptr(x, y + i);
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memset(ptr, color, w);
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}
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}
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int SetPalette(const T_Components * colors, int firstcolor, int ncolors)
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{
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if (screen == NULL) return 0;
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memcpy(screen->palette + firstcolor, colors, ncolors * sizeof(T_Components));
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return 1;
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}
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void Update_rect(short x, short y, unsigned short width, unsigned short height)
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{
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int line, i;
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if (screen == NULL || X11_image == NULL) return;
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x *= Pixel_width;
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width *= Pixel_width;
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y *= Pixel_height;
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height *= Pixel_height;
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//printf("Update_rect(%d %d %d %d) %d %d\n", x, y, width, height, screen->w, screen->h);
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if (y >= screen->h || x >= screen->w) return;
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if (y + height > screen->h)
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height = screen->h - y;
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if (x + width > screen->w)
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width = screen->w - x;
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for (line = y; line < y + height; line++)
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{
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#if 0
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const byte * src = Get_Screen_pixel_ptr(x, line);
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byte * dest = image_pixels + line * X11_image->bytes_per_line + x * 4,
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i = width;
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do
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{
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dest[0] = screen->palette[*src].B;
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dest[1] = screen->palette[*src].G;
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dest[2] = screen->palette[*src].R;
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dest[3] = 0;
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src++;
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dest += 4;
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}
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while(--i > 0);
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#else
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for (i = 0; i < width; i++)
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{
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byte v = Get_Screen_pixel(x + i, line);
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XPutPixel(X11_image, x + i, line,
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(unsigned)screen->palette[v].R << 16 | (unsigned)screen->palette[v].G << 8 | (unsigned)screen->palette[v].B);
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}
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#endif
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}
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XPutImage(X11_display, X11_window, X11_gc, X11_image,
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x, y, x, y, width, height);
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//XPutImage(X11_display, X11_window, X11_gc, X11_image,
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// 0, 0, 0, 0, X11_image->width, X11_image->height);
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//XSync(X11_display, False);
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}
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void Flush_update(void)
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{
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if (X11_display != NULL)
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XFlush(X11_display);
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}
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void Update_status_line(short char_pos, short width)
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{
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Update_rect((18+char_pos*8)*Menu_factor_X*Pixel_width, Menu_status_Y*Pixel_height,
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width*8*Menu_factor_X*Pixel_width, 8*Menu_factor_Y*Pixel_height);
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}
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void Clear_border(byte color)
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{
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(void)color;//TODO
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}
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volatile int Allow_colorcycling = 0;
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/// Activates or desactivates file drag-dropping in program window.
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void Allow_drag_and_drop(int flag)
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{
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(void)flag;
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}
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void Define_icon(void)
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{
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}
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