853 lines
21 KiB
C
853 lines
21 KiB
C
/* grTOGL3.c -
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*
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* Copyright 2003 Open Circuit Design, Inc., for MultiGiG Ltd.
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*
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* This file contains additional functions to manipulate an X window system
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* color display. Included here are device-dependent routines to draw and
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* erase text and draw a grid.
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*
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*/
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#include <stdio.h>
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#include <string.h>
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/*
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#include <GL/gl.h>
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#include <GL/glx.h>
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#include <GL/glu.h>
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*/
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#include <CAIRO/cairo.h>
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#include "tcltk/tclmagic.h"
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#include "utils/magic.h"
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#include "utils/geometry.h"
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#include "utils/malloc.h"
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#include "windows/windows.h"
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#include "graphics/graphics.h"
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#include "graphics/graphicsInt.h"
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#include "dbwind/dbwind.h"
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#include "textio/textio.h"
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#include "utils/signals.h"
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#include "utils/utils.h"
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#include "utils/hash.h"
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#include "graphics/grTOGLInt.h"
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#include "graphics/grTkCommon.h"
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#include "database/fonts.h"
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extern Display *grXdpy;
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extern cairo_t *grCairoContext;
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/* locals */
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GLuint grXBases[4];
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/*---------------------------------------------------------
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* grtoglDrawGrid:
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* grxDrawGrid adds a grid to the grid layer, using the current
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* write mask and color.
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*
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* Results:
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* TRUE is returned normally. However, if the grid gets too small
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* to be useful, then nothing is drawn and FALSE is returned.
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*
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* Side Effects: None.
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*---------------------------------------------------------
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*/
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bool
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grtcairoDrawGrid (prect, outline, clip)
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Rect *prect; /* A rectangle that forms the template
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* for the grid. Note: in order to maintain
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* precision for the grid, the rectangle
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* coordinates are specified in units of
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* screen coordinates multiplied by SUBPIXEL.
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*/
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int outline; /* the outline style */
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Rect *clip; /* a clipping rectangle */
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{
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int xsize, ysize;
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int x, y;
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int xstart, ystart;
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int snum, low, hi, shifted;
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xsize = prect->r_xtop - prect->r_xbot;
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ysize = prect->r_ytop - prect->r_ybot;
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if (!xsize || !ysize || GRID_TOO_SMALL(xsize, ysize))
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return FALSE;
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xstart = prect->r_xbot % xsize;
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while (xstart < clip->r_xbot << SUBPIXELBITS) xstart += xsize;
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ystart = prect->r_ybot % ysize;
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while (ystart < clip->r_ybot << SUBPIXELBITS) ystart += ysize;
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//grtoglSetLineStyle(outline);
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//glBegin(GL_LINES);
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snum = 0;
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low = clip->r_ybot;
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hi = clip->r_ytop;
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for (x = xstart; x < (clip->r_xtop + 1) << SUBPIXELBITS; x += xsize)
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{
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shifted = x >> SUBPIXELBITS;
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//glVertex2i(shifted, low);
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//glVertex2i(shifted, hi);
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cairo_move_to(grCairoContext, shifted, low);
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cairo_line_to(grCairoContext, shifted, hi);
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snum++;
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}
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snum = 0;
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low = clip->r_xbot;
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hi = clip->r_xtop;
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for (y = ystart; y < (clip->r_ytop + 1) << SUBPIXELBITS; y += ysize)
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{
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shifted = y >> SUBPIXELBITS;
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//glVertex2i(low, shifted);
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//glVertex2i(hi, shifted);
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cairo_move_to(grCairoContext, low, shifted);
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cairo_line_to(grCairoContext, hi, shifted);
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snum++;
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}
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//glEnd();
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cairo_stroke(grCairoContext);
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return TRUE;
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}
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/*---------------------------------------------------------
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* grtoglLoadFont
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* This local routine transfers the X font bitmaps
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* into OpenGL display lists for simple text
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* rendering.
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*
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* Results: Success/Failure
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*
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* Side Effects: None.
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*---------------------------------------------------------
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*/
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bool
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grtoglLoadFont()
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{
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Font id;
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unsigned int i;
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for (i = 0; i < 4; i++) {
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id = Tk_FontId(grTkFonts[i]);
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grXBases[i] = glGenLists(256);
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if (grXBases[i] == 0) {
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TxError("Out of display lists!\n");
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return FALSE;
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}
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glXUseXFont(id, 0, 256, grXBases[i]);
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}
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return TRUE;
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}
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/*---------------------------------------------------------
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* grtoglSetCharSize:
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* This local routine sets the character size in the display,
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* if necessary.
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*
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* Results: None.
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*
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* Side Effects: None.
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*---------------------------------------------------------
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*/
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void
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grtcairoSetCharSize (size)
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int size; /* Width of characters, in pixels (6 or 8). */
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{
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tcairoCurrent.fontSize = size;
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switch (size)
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{
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case GR_TEXT_DEFAULT:
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case GR_TEXT_SMALL:
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tcairoCurrent.font = grSmallFont;
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break;
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case GR_TEXT_MEDIUM:
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tcairoCurrent.font = grMediumFont;
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break;
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case GR_TEXT_LARGE:
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tcairoCurrent.font = grLargeFont;
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break;
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case GR_TEXT_XLARGE:
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tcairoCurrent.font = grXLargeFont;
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break;
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default:
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TxError("%s%d\n", "grtcairoSetCharSize: Unknown character size ",
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size );
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break;
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}
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}
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/*
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* ----------------------------------------------------------------------------
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* GrTOGLTextSize --
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*
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* Determine the size of a text string.
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*
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* Results:
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* None.
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*
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* Side effects:
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* A rectangle is filled in that is the size of the text in pixels.
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* The origin (0, 0) of this rectangle is located on the baseline
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* at the far left side of the string.
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* ----------------------------------------------------------------------------
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*/
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void
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GrTCairoTextSize(text, size, r)
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char *text;
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int size;
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Rect *r;
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{
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Tk_FontMetrics overall;
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Tk_Font font;
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int width;
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switch (size) {
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case GR_TEXT_DEFAULT:
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case GR_TEXT_SMALL:
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font = grSmallFont;
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break;
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case GR_TEXT_MEDIUM:
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font = grMediumFont;
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break;
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case GR_TEXT_LARGE:
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font = grLargeFont;
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break;
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case GR_TEXT_XLARGE:
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font = grXLargeFont;
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break;
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default:
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TxError("%s%d\n", "GrTOGLTextSize: Unknown character size ",
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size );
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break;
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}
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if (font == NULL) return;
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Tk_GetFontMetrics(font, &overall);
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width = Tk_TextWidth(font, text, strlen(text));
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/* Hack alert! Tk_TextWidth returns values too small! */
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width = width + (width >> 4);
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r->r_ytop = overall.ascent;
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r->r_ybot = -overall.descent;
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r->r_xtop = width;
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r->r_xbot = 0;
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}
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/* OpenGL backing store functions (now removed from the X11-based ones) */
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/* Since we always paint into the front buffer, the back buffer is */
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/* always available for backing store. We need not create or destroy */
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/* it. We just use the w_backingStore location to store whether the */
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/* backing store contains valid data or not. */
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void
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grtcairoFreeBackingStore(MagWindow *window)
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{
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//window->w_backingStore = (ClientData)0;
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Pixmap pmap = (Pixmap)window->w_backingStore;
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if (pmap == (Pixmap)NULL) return;
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XFreePixmap(grXdpy, pmap);
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window->w_backingStore = (ClientData)NULL;
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}
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void
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grtcairoCreateBackingStore(MagWindow *w)
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{
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Pixmap pmap;
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Window wind = (Window)w->w_grdata;
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unsigned int width, height;
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GC gc;
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XGCValues gcValues;
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int grDepth;
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//Tk_Window tkwind = (Tk_Window)w->w_grdata;
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/* ignore all windows other than layout */
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//if (w->w_client != DBWclientID) return;
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/* Deferred */
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//if (tkwind == NULL) return;
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//w->w_backingStore = (ClientData)1;
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if (w->w_client != DBWclientID) return;
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/* deferred */
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if (w->w_grdata == (Window)NULL) return;
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width = w->w_screenArea.r_xtop - w->w_screenArea.r_xbot;
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height = w->w_screenArea.r_ytop - w->w_screenArea.r_ybot;
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if (w->w_backingStore != (ClientData)NULL) grtcairoFreeBackingStore(w);
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/*
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if (grXcopyGC == (GC)NULL)
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{
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gcValues.graphics_exposures = FALSE;
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grXcopyGC = XCreateGC(grXdpy, wind, GCGraphicsExposures, &gcValues);
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}
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*/
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grDepth = grDisplay.depth;
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//if (grClass == 3) grDepth = 8; /* Needed since grDisplay.depth is reset
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// to 7 if Pseudocolor */
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pmap = XCreatePixmap(grXdpy, wind, width, height, grDepth);
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w->w_backingStore = (ClientData)pmap;
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}
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bool
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grtoglGetBackingStore(MagWindow *w, Rect *area)
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{
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unsigned int width, height;
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int xbot, ybot;
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Rect r;
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// GLboolean result;
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// GLint rasterpos[4];
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if (w->w_backingStore == (ClientData)0) return FALSE;
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GEO_EXPAND(area, 1, &r);
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GeoClip(&r, &(w->w_screenArea));
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width = r.r_xtop - r.r_xbot;
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height = r.r_ytop - r.r_ybot;
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xbot = r.r_xbot;
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ybot = r.r_ybot;
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/*
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glDrawBuffer(GL_FRONT);
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glReadBuffer(GL_BACK);
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glRasterPos2i((GLint)xbot, (GLint)ybot);
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*/
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/* Check for valid raster position */
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// glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, (GLboolean *)(&result));
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// glGetIntegerv(GL_CURRENT_RASTER_POSITION, (GLint *)(&rasterpos[0]));
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// TxPrintf("Raster valid = %d, position = %d %d %d %d\n",
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// (int)result, (int)rasterpos[0], (int)rasterpos[1],
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// (int)rasterpos[2], (int)rasterpos[3]);
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// if (result == 0)
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// TxPrintf("Intended position = %d %d\n", xbot, ybot);
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/*
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glDisable(GL_BLEND);
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glCopyPixels(xbot, ybot, width, height, GL_COLOR);
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*/
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Window root_return;
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int x_return, y_return;
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unsigned int width_return, height_return;
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unsigned int border_width_return;
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unsigned int depth_return;
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pmap = (Pixmap)w->w_backingStore;
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if (pmap == (Pixmap)NULL)
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return FALSE;
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XGetGeometry(grXdpy, pmap, &root_return, &x_return, &y_return, &border_width_return, &depth_return);
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cairo_surface_t *backingStoreSurface;
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backingStoreSurface = cairo_xlib_surface_create(grXdpy, pmap, DefaultVisual(grXdpy, DefaultScreen(grXdpy)), width_return, height_return);
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cairo_set_source_surface(grCairoContext, backingStoreSurface, xbot, ybot);
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cairo_rectangle(grCairoContext, xbot, ybot, width, height);
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cairo_fill(grCairoContext);
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return TRUE;
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}
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bool
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grtoglScrollBackingStore(MagWindow *w, Point *shift)
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{
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/*
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unsigned int width, height;
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int xorigin, yorigin, xshift, yshift;
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if (w->w_backingStore == (ClientData)0)
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{
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TxPrintf("grtoglScrollBackingStore %d %d failure\n",
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shift->p_x, shift->p_y);
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return FALSE;
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}
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width = w->w_screenArea.r_xtop - w->w_screenArea.r_xbot;
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height = w->w_screenArea.r_ytop - w->w_screenArea.r_ybot;
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xorigin = 0;
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yorigin = 0;
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xshift = shift->p_x;
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yshift = shift->p_y;
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if (xshift > 0)
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width -= xshift;
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else if (xshift < 0)
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{
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width += xshift;
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xorigin = -xshift;
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xshift = 0;
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}
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if (yshift > 0)
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height -= yshift;
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else if (yshift < 0)
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{
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height += yshift;
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yorigin = -yshift;
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yshift = 0;
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}
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glDrawBuffer(GL_BACK);
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glReadBuffer(GL_BACK);
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glRasterPos2i((GLint)xshift, (GLint)yshift);
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glDisable(GL_BLEND);
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glCopyPixels(xorigin, yorigin, width, height, GL_COLOR);
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glDrawBuffer(GL_FRONT);
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return TRUE;
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*/
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// copied from grX11su3.c
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Pixmap pmap;
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unsigned int width, height;
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int xorigin, yorigin, xshift, yshift;
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pmap = (Pixmap)w->w_backingStore;
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if (pmap == (Pixmap)NULL)
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{
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TxPrintf("grx11ScrollBackingStore %d %d failure\n",
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shift->p_x, shift->p_y);
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return FALSE;
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}
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width = w->w_screenArea.r_xtop - w->w_screenArea.r_xbot;
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height = w->w_screenArea.r_ytop - w->w_screenArea.r_ybot;
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xorigin = 0;
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yorigin = 0;
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xshift = shift->p_x;
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yshift = -shift->p_y;
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if (xshift > 0)
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width -= xshift;
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else if (xshift < 0)
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{
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width += xshift;
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xorigin = -xshift;
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xshift = 0;
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}
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if (yshift > 0)
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height -= yshift;
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else if (yshift < 0)
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{
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height += yshift;
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yorigin = -yshift;
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yshift = 0;
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}
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XCopyArea(grXdpy, pmap, pmap, grXcopyGC, xorigin, yorigin, width, height,
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xshift, yshift);
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/* TxPrintf("grx11ScrollBackingStore %d %d\n", shift->p_x, shift->p_y); */
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return TRUE;
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}
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void
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grtoglPutBackingStore(MagWindow *w, Rect *area)
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{
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unsigned int width, height;
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int ybot, xbot;
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// GLboolean result;
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// GLint rasterpos[4];
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if (w->w_backingStore == (ClientData)0) return;
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width = area->r_xtop - area->r_xbot;
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height = area->r_ytop - area->r_ybot;
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ybot = area->r_ybot;
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xbot = area->r_xbot;
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if (xbot < 0) {
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width -= xbot;
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xbot = 0;
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}
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if (ybot < 0) {
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height -= ybot;
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ybot = 0;
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}
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/*
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glReadBuffer(GL_FRONT);
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glDrawBuffer(GL_BACK);
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glRasterPos2i((GLint)xbot, (GLint)ybot);
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*/
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// Check for valid raster position
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// glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, (GLboolean *)(&result));
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// glGetIntegerv(GL_CURRENT_RASTER_POSITION, (GLint *)(&rasterpos[0]));
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// TxPrintf("Raster valid = %d, position = %d %d %d %d\n",
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// (int)result, (int)rasterpos[0], (int)rasterpos[1],
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// (int)rasterpos[2], (int)rasterpos[3]);
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// if (result == 0)
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// TxPrintf("Intended position = %d %d\n", xbot, ybot);
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/*
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glDisable(GL_BLEND);
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glCopyPixels(xbot, ybot, width, height, GL_COLOR);
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glDrawBuffer(GL_FRONT); // Return to normal front rendering
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*/
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Window root_return;
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int x_return, y_return;
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unsigned int width_return, height_return;
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unsigned int border_width_return;
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unsigned int depth_return;
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pmap = (Pixmap)w->w_backingStore;
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if (pmap == (Pixmap)NULL)
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return FALSE;
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XGetGeometry(grXdpy, pmap, &root_return, &x_return, &y_return, &border_width_return, &depth_return);
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cairo_surface_t *backingStoreSurface;
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backingStoreSurface = cairo_xlib_surface_create(grXdpy, pmap, DefaultVisual(grXdpy, DefaultScreen(grXdpy)), width_return, height_return);
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cairo_t *tempContext = cairo_create(backingStoreSurface);
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cairo_set_source(tempContext, cairo_get_surface(grCairoContext));
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cairo_rectangle(tempContext, xbot, ybot, width, height);
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cairo_fill(tempContext);
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}
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/*
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* ----------------------------------------------------------------------------
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* GrTOGLReadPixel --
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*
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* Read one pixel from the screen.
|
||
*
|
||
* Results:
|
||
* An integer containing the pixel's color.
|
||
*
|
||
* Side effects:
|
||
* none.
|
||
*
|
||
* ----------------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
GrTOGLReadPixel (w, x, y)
|
||
MagWindow *w;
|
||
int x, y; /* the location of a pixel in screen coords */
|
||
{
|
||
return 0; /* OpenGL has no such function, so return 0 */
|
||
}
|
||
|
||
|
||
/*
|
||
* ----------------------------------------------------------------------------
|
||
* GrTOGLBitBlt --
|
||
*
|
||
* Copy information in bit block transfers.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* changes the screen.
|
||
* ----------------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
GrTOGLBitBlt(r, p)
|
||
Rect *r;
|
||
Point *p;
|
||
{
|
||
glCopyPixels(r->r_xbot, r->r_ybot, r->r_xtop - r->r_xbot + 1,
|
||
r->r_ytop - r->r_ybot + 1, GL_COLOR);
|
||
}
|
||
|
||
#ifdef VECTOR_FONTS
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Technically, there should be no self-intersecting polygons in outline
|
||
* fonts. However, decomposition of bezier curves into line segments
|
||
* may occasionally produce one, so it needs to be handled.
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
myCombine(GLdouble coords[3], GLdouble *vertex_data[4],
|
||
GLfloat weight[4], GLdouble **outData, void *dataptr)
|
||
{
|
||
/* This needs to be free'd at the end of gluTessEndPolygon()! */
|
||
GLdouble *new = (GLdouble *)mallocMagic(2 * sizeof(GLdouble));
|
||
new[0] = coords[0];
|
||
new[1] = coords[1];
|
||
*outData = new;
|
||
/* Diagnostic */
|
||
TxError("Intersecting polygon in char \"%c\" at %g %g!\n",
|
||
*((char *)dataptr), coords[0], coords[1]);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
* Draw a text character
|
||
* This routine differs from grtoglFillPolygon() in that it uses the
|
||
* glu library to handle non-convex polygons as may appear in font
|
||
* outlines.
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
grtoglDrawCharacter(clist, tc, pixsize)
|
||
FontChar *clist;
|
||
unsigned char tc;
|
||
int pixsize;
|
||
{
|
||
Point *tp;
|
||
int np, nptotal;
|
||
int i, j;
|
||
// static GLUtesselator *tess = NULL;
|
||
// static GLdouble *v = NULL;
|
||
static int maxnp = 0;
|
||
FontChar *ccur;
|
||
|
||
if (pixsize < 5) return; /* Label too small to be useful */
|
||
|
||
for (ccur = clist; ccur != NULL; ccur = ccur->fc_next) {
|
||
tp = ccur->fc_points;
|
||
np = ccur->fc_numpoints;
|
||
cairo_move_to(grCairoContext, tp[0].p_x, tp[0].p_y);
|
||
for (i = 1; i < np; i++, j += 3) {
|
||
cairo_line_to(grCairoContext, tp[0].p_x, tp[0].p_y);
|
||
}
|
||
}
|
||
|
||
/*
|
||
if (tess == NULL)
|
||
{
|
||
tess = gluNewTess();
|
||
gluTessCallback(tess, GLU_TESS_BEGIN, (_GLUfuncptr)glBegin);
|
||
gluTessCallback(tess, GLU_TESS_VERTEX, (_GLUfuncptr)glVertex3dv);
|
||
gluTessCallback(tess, GLU_TESS_END, (_GLUfuncptr)glEnd);
|
||
gluTessCallback(tess, GLU_TESS_COMBINE_DATA, (_GLUfuncptr)myCombine);
|
||
}
|
||
// Boundary-only does not look particularly good. . .
|
||
gluTessProperty(tess, GLU_TESS_BOUNDARY_ONLY, GL_FALSE);
|
||
|
||
nptotal = 0;
|
||
for (ccur = clist; ccur != NULL; ccur = ccur->fc_next)
|
||
nptotal += ccur->fc_numpoints;
|
||
|
||
if (nptotal > maxnp)
|
||
{
|
||
if (v != NULL) freeMagic((char *)v);
|
||
maxnp = nptotal;
|
||
v = (GLdouble *)mallocMagic(nptotal * 3 * sizeof(GLdouble));
|
||
}
|
||
|
||
j = 0;
|
||
for (ccur = clist; ccur != NULL; ccur = ccur->fc_next)
|
||
{
|
||
tp = ccur->fc_points;
|
||
np = ccur->fc_numpoints;
|
||
|
||
for (i = 0; i < np; i++, j += 3) {
|
||
v[j] = tp[i].p_x;
|
||
v[j + 1] = tp[i].p_y;
|
||
v[j + 2] = 0;
|
||
}
|
||
}
|
||
|
||
gluTessBeginPolygon(tess, (GLvoid *)(&tc));
|
||
j = 0;
|
||
for (ccur = clist; ccur != NULL; ccur = ccur->fc_next)
|
||
{
|
||
np = ccur->fc_numpoints;
|
||
gluTessBeginContour(tess);
|
||
for (i = 0; i < np; i++, j += 3) {
|
||
gluTessVertex(tess, &v[j], &v[j]);
|
||
}
|
||
gluTessEndContour(tess);
|
||
}
|
||
gluTessEndPolygon(tess);
|
||
*/
|
||
}
|
||
|
||
/*---------------------------------------------------------
|
||
* grtoglFontText:
|
||
*
|
||
* This routine draws text from font vectors using the
|
||
* font vector routines in DBlabel.c. Text is clipped
|
||
* to the clipping rectangle.
|
||
*
|
||
* For speed, we should be transferring the font
|
||
* vectors into OpenGL display lists!
|
||
*
|
||
*---------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
grtoglFontText(text, font, size, rotate, pos, clip, obscure)
|
||
char *text; /* The text to be drawn */
|
||
int font; /* Font to use from fontList */
|
||
int size; /* Pixel size of the font */
|
||
int rotate; /* Text rotation */
|
||
Point *pos; /* Text base position */
|
||
Rect *clip; /* Clipping area */
|
||
LinkedRect *obscure; /* List of obscuring areas */
|
||
{
|
||
char *tptr;
|
||
Point *coffset; /* vector to next character */
|
||
Rect *cbbox;
|
||
GLfloat fsize, matvals[16];
|
||
FontChar *clist;
|
||
int cheight, baseline;
|
||
float tmp;
|
||
|
||
/* Keep it simple for now---ignore clip and obscure */
|
||
/*
|
||
glDisable(GL_BLEND);
|
||
glPushMatrix();
|
||
glTranslated(pos->p_x, pos->p_y, 0);
|
||
glRotated(rotate, 0, 0, 1);
|
||
*/
|
||
|
||
// how to replace glPushMatrix???
|
||
cairo_translate(grCairoContext, pos->p_x, pos->p_y);
|
||
cairo_rotate(grCairoContext, ((double)angle) / 360 * 2 * M_PI);
|
||
|
||
/* Get label size */
|
||
cbbox = &DBFontList[font]->mf_extents;
|
||
|
||
//fsize = (GLfloat)size / (GLfloat)cbbox->r_ytop;
|
||
fsize = (uint8_t)size / (uint8_t)cbbox->r_ytop;
|
||
//glScalef(fsize, fsize, 1.0);
|
||
cairo_scale(grCairoContext, fsize, fsize);
|
||
|
||
/* Adjust to baseline */
|
||
baseline = 0;
|
||
for (tptr = text; *tptr != '\0'; tptr++)
|
||
{
|
||
DBFontChar(font, *tptr, NULL, NULL, &cbbox);
|
||
if (cbbox->r_ybot < baseline)
|
||
baseline = cbbox->r_ybot;
|
||
}
|
||
//glTranslated(0, -baseline, 0);
|
||
cairo_translate(grCairoContext, 0, -baseline);
|
||
|
||
for (tptr = text; *tptr != '\0'; tptr++)
|
||
{
|
||
DBFontChar(font, *tptr, &clist, &coffset, NULL);
|
||
grtoglDrawCharacter(clist, *tptr, size);
|
||
//glTranslated(coffset->p_x, coffset->p_y, 0);
|
||
cairo_translate(grCairoContext, coffset->p_x, coffset->p_y);
|
||
}
|
||
//glPopMatrix();
|
||
}
|
||
|
||
#endif /* VECTOR_FONTS */
|
||
|
||
/*---------------------------------------------------------
|
||
* grtoglPutText:
|
||
* (modified on SunPutText)
|
||
*
|
||
* This routine puts a chunk of text on the screen in the current
|
||
* color, size, etc. The caller must ensure that it fits on
|
||
* the screen -- no clipping is done except to the obscuring rectangle
|
||
* list and the clip rectangle.
|
||
*
|
||
* Results:
|
||
* none.
|
||
*
|
||
* Side Effects:
|
||
* The text is drawn on the screen.
|
||
*
|
||
*---------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
grtoglPutText (text, pos, clip, obscure)
|
||
char *text; /* The text to be drawn. */
|
||
Point *pos; /* A point located at the leftmost point of
|
||
* the baseline for this string.
|
||
*/
|
||
Rect *clip; /* A rectangle to clip against */
|
||
LinkedRect *obscure; /* A list of obscuring rectangles */
|
||
|
||
{
|
||
Rect location;
|
||
Rect overlap;
|
||
Rect textrect;
|
||
LinkedRect *ob;
|
||
void grTOGLGeoSub();
|
||
int i;
|
||
float tscale;
|
||
|
||
GrTOGLTextSize(text, toglCurrent.fontSize, &textrect);
|
||
|
||
location.r_xbot = pos->p_x + textrect.r_xbot;
|
||
location.r_xtop = pos->p_x + textrect.r_xtop;
|
||
location.r_ybot = pos->p_y + textrect.r_ybot;
|
||
location.r_ytop = pos->p_y + textrect.r_ytop;
|
||
|
||
/* erase parts of the bitmap that are obscured */
|
||
for (ob = obscure; ob != NULL; ob = ob->r_next)
|
||
{
|
||
if (GEO_TOUCH(&ob->r_r, &location))
|
||
{
|
||
overlap = location;
|
||
GeoClip(&overlap, &ob->r_r);
|
||
grTOGLGeoSub(&location, &overlap);
|
||
}
|
||
}
|
||
|
||
overlap = location;
|
||
GeoClip(&overlap, clip);
|
||
|
||
/* copy the text to the color screen */
|
||
if ((overlap.r_xbot < overlap.r_xtop) && (overlap.r_ybot <= overlap.r_ytop))
|
||
{
|
||
glScissor(overlap.r_xbot, overlap.r_ybot, overlap.r_xtop - overlap.r_xbot,
|
||
overlap.r_ytop - overlap.r_ybot);
|
||
glEnable(GL_SCISSOR_TEST);
|
||
glDisable(GL_BLEND);
|
||
glRasterPos2i(pos->p_x, pos->p_y);
|
||
glListBase(grXBases[(toglCurrent.fontSize == GR_TEXT_DEFAULT) ?
|
||
GR_TEXT_SMALL : toglCurrent.fontSize]);
|
||
glCallLists(strlen(text), GL_UNSIGNED_BYTE, (unsigned char *)text);
|
||
glDisable(GL_SCISSOR_TEST);
|
||
}
|
||
}
|
||
|
||
|
||
/* grTOGLGeoSub:
|
||
* return the tallest sub-rectangle of r not obscured by area
|
||
* area must be within r.
|
||
*/
|
||
|
||
void
|
||
grTOGLGeoSub(r, area)
|
||
Rect *r; /* Rectangle to be subtracted from. */
|
||
Rect *area; /* Area to be subtracted. */
|
||
|
||
{
|
||
if (r->r_xbot == area->r_xbot) r->r_xbot = area->r_xtop;
|
||
else if (r->r_xtop == area->r_xtop) r->r_xtop = area->r_xbot;
|
||
else if (r->r_ybot <= area->r_ybot) r->r_ybot = area->r_ytop;
|
||
else if (r->r_ytop == area->r_ytop) r->r_ytop = area->r_ybot;
|
||
else
|
||
r->r_xtop = area->r_xbot;
|
||
}
|