GRAPHICS: Move generic primitives from WAGE engine
This commit is contained in:
Eugene Sandulenko
parent
1d5220ef3f
commit
5e002c4fe2
4 changed files with 378 additions and 378 deletions
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@ -226,7 +226,7 @@ void Design::drawRect(Graphics::Surface *surface, Common::ReadStream &in,
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plotData pd(surface, &patterns, fillType, 1);
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if (fillType <= patterns.size())
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drawFilledRect(r, kColorBlack, drawPixel, &pd);
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Graphics::drawFilledRect(r, kColorBlack, drawPixel, &pd);
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pd.fillType = borderFillType;
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pd.thickness = borderThickness;
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@ -256,13 +256,13 @@ void Design::drawRoundRect(Graphics::Surface *surface, Common::ReadStream &in,
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plotData pd(surface, &patterns, fillType, 1);
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if (fillType <= patterns.size())
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drawRoundRect(r, arc/2, kColorBlack, true, drawPixel, &pd);
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Graphics::drawRoundRect(r, arc/2, kColorBlack, true, drawPixel, &pd);
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pd.fillType = borderFillType;
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pd.thickness = borderThickness;
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if (borderThickness > 0 && borderFillType <= patterns.size())
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drawRoundRect(r, arc/2, kColorBlack, false, drawPixel, &pd);
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Graphics::drawRoundRect(r, arc/2, kColorBlack, false, drawPixel, &pd);
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}
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void Design::drawPolygon(Graphics::Surface *surface, Common::ReadStream &in,
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@ -326,7 +326,7 @@ void Design::drawPolygon(Graphics::Surface *surface, Common::ReadStream &in,
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plotData pd(surface, &patterns, fillType, 1);
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if (fillType <= patterns.size()) {
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drawPolygonScan(xpoints, ypoints, npoints, bbox, kColorBlack, drawPixel, &pd);
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Graphics::drawPolygonScan(xpoints, ypoints, npoints, bbox, kColorBlack, drawPixel, &pd);
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}
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pd.fillType = borderFillType;
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@ -349,13 +349,13 @@ void Design::drawOval(Graphics::Surface *surface, Common::ReadStream &in,
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plotData pd(surface, &patterns, fillType, 1);
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if (fillType <= patterns.size())
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drawEllipse(x1, y1, x2-1, y2-1, true, drawPixel, &pd);
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Graphics::drawEllipse(x1, y1, x2-1, y2-1, kColorBlack, true, drawPixel, &pd);
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pd.fillType = borderFillType;
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pd.thickness = borderThickness;
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if (borderThickness > 0 && borderFillType <= patterns.size())
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drawEllipse(x1, y1, x2-1, y2-1, false, drawPixel, &pd);
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Graphics::drawEllipse(x1, y1, x2-1, y2-1, kColorBlack, false, drawPixel, &pd);
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}
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void Design::drawBitmap(Graphics::Surface *surface, Common::ReadStream &in) {
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@ -460,383 +460,25 @@ void Design::drawFilledRect(Graphics::Surface *surface, Common::Rect &rect, int
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plotData pd(surface, &patterns, fillType, 1);
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for (int y = rect.top; y <= rect.bottom; y++)
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drawHLine(rect.left, rect.right, y, color, drawPixel, &pd);
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}
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void Design::drawFilledRect(Common::Rect &rect, int color, void (*plotProc)(int, int, int, void *), void *data) {
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for (int y = rect.top; y <= rect.bottom; y++)
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drawHLine(rect.left, rect.right, y, color, plotProc, data);
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Graphics::drawHLine(rect.left, rect.right, y, color, drawPixel, &pd);
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}
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void Design::drawFilledRoundRect(Graphics::Surface *surface, Common::Rect &rect, int arc, int color, Patterns &patterns, byte fillType) {
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plotData pd(surface, &patterns, fillType, 1);
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drawRoundRect(rect, arc, color, true, drawPixel, &pd);
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}
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// http://members.chello.at/easyfilter/bresenham.html
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void Design::drawRoundRect(Common::Rect &rect, int arc, int color, bool filled, void (*plotProc)(int, int, int, void *), void *data) {
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if (rect.height() < rect.width()) {
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int x = -arc, y = 0, err = 2-2*arc; /* II. Quadrant */
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int dy = rect.height() - arc * 2;
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int r = arc;
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int stop = 0;
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int lastx, lasty;
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if (dy < 0)
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stop = -dy / 2;
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do {
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if (filled) {
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drawHLine(rect.left+x+r, rect.right-x-r, rect.top-y+r-stop, color, plotProc, data);
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drawHLine(rect.left+x+r, rect.right-x-r, rect.bottom+y-r+stop, color, plotProc, data);
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} else {
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(*plotProc)(rect.left+x+r, rect.top-y+r-stop, color, data);
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(*plotProc)(rect.right-x-r, rect.top-y+r-stop, color, data);
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(*plotProc)(rect.left+x+r, rect.bottom+y-r+stop, color, data);
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(*plotProc)(rect.right-x-r, rect.bottom+y-r+stop, color, data);
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lastx = x;
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lasty = y;
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}
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arc = err;
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if (arc <= y) err += ++y*2+1; /* e_xy+e_y < 0 */
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if (arc > x || err > y) err += ++x*2+1; /* e_xy+e_x > 0 or no 2nd y-step */
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if (stop && y > stop)
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break;
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} while (x < 0);
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if (!filled) {
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x = lastx;
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y = lasty;
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drawHLine(rect.left+x+r, rect.right-x-r, rect.top-y+r-stop, color, plotProc, data);
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drawHLine(rect.left+x+r, rect.right-x-r, rect.bottom+y-r+stop, color, plotProc, data);
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}
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for (int i = 0; i < dy; i++) {
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if (filled) {
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drawHLine(rect.left, rect.right, rect.top + r + i, color, plotProc, data);
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} else {
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(*plotProc)(rect.left, rect.top + r + i, color, data);
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(*plotProc)(rect.right, rect.top + r + i, color, data);
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}
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}
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} else {
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int y = -arc, x = 0, err = 2-2*arc; /* II. Quadrant */
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int dx = rect.width() - arc * 2;
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int r = arc;
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int stop = 0;
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int lastx, lasty;
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if (dx < 0)
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stop = -dx / 2;
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do {
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if (filled) {
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drawVLine(rect.left-x+r-stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
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drawVLine(rect.right+x-r+stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
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} else {
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(*plotProc)(rect.left-x+r-stop, rect.top+y+r, color, data);
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(*plotProc)(rect.left-x+r-stop, rect.bottom-y-r, color, data);
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(*plotProc)(rect.right+x-r+stop, rect.top+y+r, color, data);
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(*plotProc)(rect.right+x-r+stop, rect.bottom-y-r, color, data);
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lastx = x;
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lasty = y;
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}
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arc = err;
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if (arc <= x) err += ++x*2+1; /* e_xy+e_y < 0 */
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if (arc > y || err > x) err += ++y*2+1; /* e_xy+e_x > 0 or no 2nd y-step */
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if (stop && x > stop)
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break;
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} while (y < 0);
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if (!filled) {
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x = lastx;
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y = lasty;
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drawVLine(rect.left-x+r-stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
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drawVLine(rect.right+x-r+stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
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}
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for (int i = 0; i < dx; i++) {
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if (filled) {
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drawVLine(rect.left + r + i, rect.top, rect.bottom, color, plotProc, data);
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} else {
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(*plotProc)(rect.left + r + i, rect.top, color, data);
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(*plotProc)(rect.left + r + i, rect.bottom, color, data);
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}
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}
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}
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}
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// Based on public-domain code by Darel Rex Finley, 2007
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// http://alienryderflex.com/polygon_fill/
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void Design::drawPolygonScan(int *polyX, int *polyY, int npoints, Common::Rect &bbox, int color,
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void (*plotProc)(int, int, int, void *), void *data) {
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int *nodeX = (int *)calloc(npoints, sizeof(int));
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int i, j;
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// Loop through the rows of the image.
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for (int pixelY = bbox.top; pixelY < bbox.bottom; pixelY++) {
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// Build a list of nodes.
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int nodes = 0;
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j = npoints - 1;
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for (i = 0; i < npoints; i++) {
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if ((polyY[i] < pixelY && polyY[j] >= pixelY) || (polyY[j] < pixelY && polyY[i] >= pixelY)) {
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nodeX[nodes++] = (int)(polyX[i] + (double)(pixelY - polyY[i]) / (double)(polyY[j]-polyY[i]) *
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(double)(polyX[j] - polyX[i]) + 0.5);
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}
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j = i;
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}
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// Sort the nodes, via a simple “Bubble” sort.
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i = 0;
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while (i < nodes - 1) {
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if (nodeX[i] > nodeX[i + 1]) {
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SWAP(nodeX[i], nodeX[i + 1]);
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if (i)
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i--;
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} else {
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i++;
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}
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}
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// Fill the pixels between node pairs.
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for (i = 0; i < nodes; i += 2) {
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if (nodeX[i ] >= bbox.right)
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break;
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if (nodeX[i + 1] > bbox.left) {
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nodeX[i] = MAX<int16>(nodeX[i], bbox.left);
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nodeX[i + 1] = MIN<int16>(nodeX[i + 1], bbox.right);
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drawHLine(nodeX[i], nodeX[i + 1], pixelY, color, plotProc, data);
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}
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}
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}
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free(nodeX);
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}
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// http://members.chello.at/easyfilter/bresenham.html
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void Design::drawEllipse(int x0, int y0, int x1, int y1, bool filled, void (*plotProc)(int, int, int, void *), void *data) {
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int a = abs(x1-x0), b = abs(y1-y0), b1 = b&1; /* values of diameter */
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long dx = 4*(1-a)*b*b, dy = 4*(b1+1)*a*a; /* error increment */
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long err = dx+dy+b1*a*a, e2; /* error of 1.step */
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if (x0 > x1) { x0 = x1; x1 += a; } /* if called with swapped points */
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if (y0 > y1) y0 = y1; /* .. exchange them */
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y0 += (b+1)/2; y1 = y0-b1; /* starting pixel */
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a *= 8*a; b1 = 8*b*b;
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do {
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if (filled) {
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drawHLine(x0, x1, y0, kColorBlack, plotProc, data);
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drawHLine(x0, x1, y1, kColorBlack, plotProc, data);
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} else {
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(*plotProc)(x1, y0, kColorBlack, data); /* I. Quadrant */
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(*plotProc)(x0, y0, kColorBlack, data); /* II. Quadrant */
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(*plotProc)(x0, y1, kColorBlack, data); /* III. Quadrant */
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(*plotProc)(x1, y1, kColorBlack, data); /* IV. Quadrant */
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}
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e2 = 2*err;
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if (e2 <= dy) { y0++; y1--; err += dy += a; } /* y step */
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if (e2 >= dx || 2*err > dy) { x0++; x1--; err += dx += b1; } /* x step */
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} while (x0 <= x1);
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while (y0-y1 < b) { /* too early stop of flat ellipses a=1 */
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if (filled) {
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drawHLine(x0-1, x0-1, y0, kColorBlack, plotProc, data); /* -> finish tip of ellipse */
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drawHLine(x1+1, x1+1, y0, kColorBlack, plotProc, data);
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drawHLine(x0-1, x0-1, y1, kColorBlack, plotProc, data);
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drawHLine(x1+1, x1+1, y1, kColorBlack, plotProc, data);
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} else {
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(*plotProc)(x0-1, y0, kColorBlack, data); /* -> finish tip of ellipse */
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(*plotProc)(x1+1, y0, kColorBlack, data);
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(*plotProc)(x0-1, y1, kColorBlack, data);
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(*plotProc)(x1+1, y1, kColorBlack, data);
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}
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y0++;
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y1--;
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}
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Graphics::drawRoundRect(rect, arc, color, true, drawPixel, &pd);
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}
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void Design::drawHLine(Graphics::Surface *surface, int x1, int x2, int y, int thickness, int color, Patterns &patterns, byte fillType) {
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plotData pd(surface, &patterns, fillType, thickness);
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drawHLine(x1, x2, y, color, drawPixel, &pd);
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}
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void Design::drawHLine(int x1, int x2, int y, int color, void (*plotProc)(int, int, int, void *), void *data) {
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if (x1 > x2)
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SWAP(x1, x2);
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for (int x = x1; x <= x2; x++)
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(*plotProc)(x, y, color, data);
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Graphics::drawHLine(x1, x2, y, color, drawPixel, &pd);
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}
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void Design::drawVLine(Graphics::Surface *surface, int x, int y1, int y2, int thickness, int color, Patterns &patterns, byte fillType) {
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plotData pd(surface, &patterns, fillType, thickness);
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drawVLine(x, y1, y2, color, drawPixel, &pd);
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}
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void Design::drawVLine(int x, int y1, int y2, int color, void (*plotProc)(int, int, int, void *), void *data) {
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if (y1 > y2)
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SWAP(y1, y2);
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for (int y = y1; y <= y2; y++)
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(*plotProc)(x, y, color, data);
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}
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/* Bresenham as presented in Foley & Van Dam */
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/* Code is based on GD lib http://libgd.github.io/ */
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void Design::drawThickLine (int x1, int y1, int x2, int y2, int thick, int color,
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void (*plotProc)(int, int, int, void *), void *data) {
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int incr1, incr2, d, x, y, xend, yend, xdirflag, ydirflag;
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int wid;
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int w, wstart;
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int dx = abs(x2 - x1);
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int dy = abs(y2 - y1);
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if (dx == 0) {
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if (y1 > y2)
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SWAP(y1, y2);
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Common::Rect r(x1, y1, x1 + thick - 1, y2);
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drawFilledRect(r, color, plotProc, data);
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return;
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} else if (dy == 0) {
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if (x1 > x2)
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SWAP(x1, x2);
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Common::Rect r(x1, y1, x2, y1 + thick - 1);
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drawFilledRect(r, color, plotProc, data);
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return;
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}
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if (dy <= dx) {
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/* More-or-less horizontal. use wid for vertical stroke */
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/* Doug Claar: watch out for NaN in atan2 (2.0.5) */
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/* 2.0.12: Michael Schwartz: divide rather than multiply;
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TBB: but watch out for /0! */
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double ac = cos(atan2 (dy, dx));
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if (ac != 0) {
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wid = thick / ac;
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} else {
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wid = 1;
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}
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if (wid == 0) {
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wid = 1;
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}
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d = 2 * dy - dx;
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incr1 = 2 * dy;
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incr2 = 2 * (dy - dx);
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if (x1 > x2) {
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x = x2;
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y = y2;
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ydirflag = (-1);
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xend = x1;
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} else {
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x = x1;
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y = y1;
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ydirflag = 1;
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xend = x2;
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}
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/* Set up line thickness */
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wstart = y - wid / 2;
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for (w = wstart; w < wstart + wid; w++)
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(*plotProc)(x, y, color, data);
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if (((y2 - y1) * ydirflag) > 0) {
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while (x < xend) {
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x++;
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if (d < 0) {
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d += incr1;
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} else {
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y++;
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d += incr2;
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}
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wstart = y - wid / 2;
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for (w = wstart; w < wstart + wid; w++)
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(*plotProc)(x, w, color, data);
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}
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} else {
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while (x < xend) {
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x++;
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if (d < 0) {
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d += incr1;
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} else {
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y--;
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d += incr2;
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}
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wstart = y - wid / 2;
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for (w = wstart; w < wstart + wid; w++)
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(*plotProc)(x, w, color, data);
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}
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}
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} else {
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/* More-or-less vertical. use wid for horizontal stroke */
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/* 2.0.12: Michael Schwartz: divide rather than multiply;
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TBB: but watch out for /0! */
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double as = sin(atan2(dy, dx));
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if (as != 0) {
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wid = thick / as;
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} else {
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wid = 1;
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}
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if (wid == 0)
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wid = 1;
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d = 2 * dx - dy;
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incr1 = 2 * dx;
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incr2 = 2 * (dx - dy);
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if (y1 > y2) {
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y = y2;
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x = x2;
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yend = y1;
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xdirflag = (-1);
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} else {
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y = y1;
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x = x1;
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yend = y2;
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xdirflag = 1;
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}
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/* Set up line thickness */
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wstart = x - wid / 2;
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for (w = wstart; w < wstart + wid; w++)
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(*plotProc)(w, y, color, data);
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if (((x2 - x1) * xdirflag) > 0) {
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while (y < yend) {
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y++;
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if (d < 0) {
|
||||
d += incr1;
|
||||
} else {
|
||||
x++;
|
||||
d += incr2;
|
||||
}
|
||||
wstart = x - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(w, y, color, data);
|
||||
}
|
||||
} else {
|
||||
while (y < yend) {
|
||||
y++;
|
||||
if (d < 0) {
|
||||
d += incr1;
|
||||
} else {
|
||||
x--;
|
||||
d += incr2;
|
||||
}
|
||||
wstart = x - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(w, y, color, data);
|
||||
}
|
||||
}
|
||||
}
|
||||
Graphics::drawVLine(x, y1, y2, color, drawPixel, &pd);
|
||||
}
|
||||
|
||||
FloodFill::FloodFill(Graphics::Surface *surface, byte color1, byte color2) {
|
||||
|
|
|
|||
|
|
@ -93,16 +93,6 @@ private:
|
|||
void drawOval(Graphics::Surface *surface, Common::ReadStream &in,
|
||||
Patterns &patterns, byte fillType, byte borderThickness, byte borderFillType);
|
||||
void drawBitmap(Graphics::Surface *surface, Common::ReadStream &in);
|
||||
|
||||
void drawFilledRect(Common::Rect &rect, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
static void drawRoundRect(Common::Rect &rect, int arc, int color, bool filled, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawPolygonScan(int *polyX, int *polyY, int npoints, Common::Rect &bbox, int color,
|
||||
void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawEllipse(int x0, int y0, int x1, int y1, bool filled, void (*plotProc)(int, int, int, void *), void *data);
|
||||
static void drawHLine(int x1, int x2, int y, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
static void drawVLine(int x, int y1, int y2, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawThickLine (int x1, int y1, int x2, int y2, int thick, int color,
|
||||
void (*plotProc)(int, int, int, void *), void *data);
|
||||
};
|
||||
|
||||
class FloodFill {
|
||||
|
|
|
|||
|
|
@ -21,6 +21,7 @@
|
|||
*/
|
||||
|
||||
#include "common/util.h"
|
||||
#include "graphics/primitives.h"
|
||||
|
||||
namespace Graphics {
|
||||
|
||||
|
|
@ -62,6 +63,22 @@ void drawLine(int x0, int y0, int x1, int y1, int color, void (*plotProc)(int, i
|
|||
}
|
||||
}
|
||||
|
||||
void drawHLine(int x1, int x2, int y, int color, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
if (x1 > x2)
|
||||
SWAP(x1, x2);
|
||||
|
||||
for (int x = x1; x <= x2; x++)
|
||||
(*plotProc)(x, y, color, data);
|
||||
}
|
||||
|
||||
void drawVLine(int x, int y1, int y2, int color, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
if (y1 > y2)
|
||||
SWAP(y1, y2);
|
||||
|
||||
for (int y = y1; y <= y2; y++)
|
||||
(*plotProc)(x, y, color, data);
|
||||
}
|
||||
|
||||
void drawThickLine(int x0, int y0, int x1, int y1, int penX, int penY, int color, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
assert(penX > 0 && penY > 0);
|
||||
|
||||
|
|
@ -79,4 +96,344 @@ void drawThickLine(int x0, int y0, int x1, int y1, int penX, int penY, int color
|
|||
drawLine(x0 + x, y0 + y, x1 + x, y1 + y, color, plotProc, data);
|
||||
}
|
||||
|
||||
/* Bresenham as presented in Foley & Van Dam */
|
||||
/* Code is based on GD lib http://libgd.github.io/ */
|
||||
void drawThickLine2(int x1, int y1, int x2, int y2, int thick, int color, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
int incr1, incr2, d, x, y, xend, yend, xdirflag, ydirflag;
|
||||
int wid;
|
||||
int w, wstart;
|
||||
|
||||
int dx = abs(x2 - x1);
|
||||
int dy = abs(y2 - y1);
|
||||
|
||||
if (dx == 0) {
|
||||
if (y1 > y2)
|
||||
SWAP(y1, y2);
|
||||
Common::Rect r(x1, y1, x1 + thick - 1, y2);
|
||||
drawFilledRect(r, color, plotProc, data);
|
||||
return;
|
||||
} else if (dy == 0) {
|
||||
if (x1 > x2)
|
||||
SWAP(x1, x2);
|
||||
Common::Rect r(x1, y1, x2, y1 + thick - 1);
|
||||
drawFilledRect(r, color, plotProc, data);
|
||||
return;
|
||||
}
|
||||
|
||||
if (dy <= dx) {
|
||||
/* More-or-less horizontal. use wid for vertical stroke */
|
||||
/* Doug Claar: watch out for NaN in atan2 (2.0.5) */
|
||||
|
||||
/* 2.0.12: Michael Schwartz: divide rather than multiply;
|
||||
TBB: but watch out for /0! */
|
||||
double ac = cos(atan2 (dy, dx));
|
||||
if (ac != 0) {
|
||||
wid = thick / ac;
|
||||
} else {
|
||||
wid = 1;
|
||||
}
|
||||
if (wid == 0) {
|
||||
wid = 1;
|
||||
}
|
||||
d = 2 * dy - dx;
|
||||
incr1 = 2 * dy;
|
||||
incr2 = 2 * (dy - dx);
|
||||
if (x1 > x2) {
|
||||
x = x2;
|
||||
y = y2;
|
||||
ydirflag = (-1);
|
||||
xend = x1;
|
||||
} else {
|
||||
x = x1;
|
||||
y = y1;
|
||||
ydirflag = 1;
|
||||
xend = x2;
|
||||
}
|
||||
|
||||
/* Set up line thickness */
|
||||
wstart = y - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(x, y, color, data);
|
||||
|
||||
if (((y2 - y1) * ydirflag) > 0) {
|
||||
while (x < xend) {
|
||||
x++;
|
||||
if (d < 0) {
|
||||
d += incr1;
|
||||
} else {
|
||||
y++;
|
||||
d += incr2;
|
||||
}
|
||||
wstart = y - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(x, w, color, data);
|
||||
}
|
||||
} else {
|
||||
while (x < xend) {
|
||||
x++;
|
||||
if (d < 0) {
|
||||
d += incr1;
|
||||
} else {
|
||||
y--;
|
||||
d += incr2;
|
||||
}
|
||||
wstart = y - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(x, w, color, data);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/* More-or-less vertical. use wid for horizontal stroke */
|
||||
/* 2.0.12: Michael Schwartz: divide rather than multiply;
|
||||
TBB: but watch out for /0! */
|
||||
double as = sin(atan2(dy, dx));
|
||||
if (as != 0) {
|
||||
wid = thick / as;
|
||||
} else {
|
||||
wid = 1;
|
||||
}
|
||||
if (wid == 0)
|
||||
wid = 1;
|
||||
|
||||
d = 2 * dx - dy;
|
||||
incr1 = 2 * dx;
|
||||
incr2 = 2 * (dx - dy);
|
||||
if (y1 > y2) {
|
||||
y = y2;
|
||||
x = x2;
|
||||
yend = y1;
|
||||
xdirflag = (-1);
|
||||
} else {
|
||||
y = y1;
|
||||
x = x1;
|
||||
yend = y2;
|
||||
xdirflag = 1;
|
||||
}
|
||||
|
||||
/* Set up line thickness */
|
||||
wstart = x - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(w, y, color, data);
|
||||
|
||||
if (((x2 - x1) * xdirflag) > 0) {
|
||||
while (y < yend) {
|
||||
y++;
|
||||
if (d < 0) {
|
||||
d += incr1;
|
||||
} else {
|
||||
x++;
|
||||
d += incr2;
|
||||
}
|
||||
wstart = x - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(w, y, color, data);
|
||||
}
|
||||
} else {
|
||||
while (y < yend) {
|
||||
y++;
|
||||
if (d < 0) {
|
||||
d += incr1;
|
||||
} else {
|
||||
x--;
|
||||
d += incr2;
|
||||
}
|
||||
wstart = x - wid / 2;
|
||||
for (w = wstart; w < wstart + wid; w++)
|
||||
(*plotProc)(w, y, color, data);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void drawFilledRect(Common::Rect &rect, int color, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
for (int y = rect.top; y <= rect.bottom; y++)
|
||||
drawHLine(rect.left, rect.right, y, color, plotProc, data);
|
||||
}
|
||||
|
||||
// http://members.chello.at/easyfilter/bresenham.html
|
||||
void drawRoundRect(Common::Rect &rect, int arc, int color, bool filled, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
if (rect.height() < rect.width()) {
|
||||
int x = -arc, y = 0, err = 2-2*arc; /* II. Quadrant */
|
||||
int dy = rect.height() - arc * 2;
|
||||
int r = arc;
|
||||
int stop = 0;
|
||||
int lastx, lasty;
|
||||
if (dy < 0)
|
||||
stop = -dy / 2;
|
||||
|
||||
do {
|
||||
if (filled) {
|
||||
drawHLine(rect.left+x+r, rect.right-x-r, rect.top-y+r-stop, color, plotProc, data);
|
||||
drawHLine(rect.left+x+r, rect.right-x-r, rect.bottom+y-r+stop, color, plotProc, data);
|
||||
} else {
|
||||
(*plotProc)(rect.left+x+r, rect.top-y+r-stop, color, data);
|
||||
(*plotProc)(rect.right-x-r, rect.top-y+r-stop, color, data);
|
||||
(*plotProc)(rect.left+x+r, rect.bottom+y-r+stop, color, data);
|
||||
(*plotProc)(rect.right-x-r, rect.bottom+y-r+stop, color, data);
|
||||
|
||||
lastx = x;
|
||||
lasty = y;
|
||||
}
|
||||
arc = err;
|
||||
if (arc <= y) err += ++y*2+1; /* e_xy+e_y < 0 */
|
||||
if (arc > x || err > y) err += ++x*2+1; /* e_xy+e_x > 0 or no 2nd y-step */
|
||||
if (stop && y > stop)
|
||||
break;
|
||||
} while (x < 0);
|
||||
|
||||
if (!filled) {
|
||||
x = lastx;
|
||||
y = lasty;
|
||||
|
||||
drawHLine(rect.left+x+r, rect.right-x-r, rect.top-y+r-stop, color, plotProc, data);
|
||||
drawHLine(rect.left+x+r, rect.right-x-r, rect.bottom+y-r+stop, color, plotProc, data);
|
||||
}
|
||||
|
||||
for (int i = 0; i < dy; i++) {
|
||||
if (filled) {
|
||||
drawHLine(rect.left, rect.right, rect.top + r + i, color, plotProc, data);
|
||||
} else {
|
||||
(*plotProc)(rect.left, rect.top + r + i, color, data);
|
||||
(*plotProc)(rect.right, rect.top + r + i, color, data);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
int y = -arc, x = 0, err = 2-2*arc; /* II. Quadrant */
|
||||
int dx = rect.width() - arc * 2;
|
||||
int r = arc;
|
||||
int stop = 0;
|
||||
int lastx, lasty;
|
||||
if (dx < 0)
|
||||
stop = -dx / 2;
|
||||
|
||||
do {
|
||||
if (filled) {
|
||||
drawVLine(rect.left-x+r-stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
|
||||
drawVLine(rect.right+x-r+stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
|
||||
} else {
|
||||
(*plotProc)(rect.left-x+r-stop, rect.top+y+r, color, data);
|
||||
(*plotProc)(rect.left-x+r-stop, rect.bottom-y-r, color, data);
|
||||
(*plotProc)(rect.right+x-r+stop, rect.top+y+r, color, data);
|
||||
(*plotProc)(rect.right+x-r+stop, rect.bottom-y-r, color, data);
|
||||
|
||||
lastx = x;
|
||||
lasty = y;
|
||||
}
|
||||
|
||||
arc = err;
|
||||
if (arc <= x) err += ++x*2+1; /* e_xy+e_y < 0 */
|
||||
if (arc > y || err > x) err += ++y*2+1; /* e_xy+e_x > 0 or no 2nd y-step */
|
||||
if (stop && x > stop)
|
||||
break;
|
||||
} while (y < 0);
|
||||
|
||||
if (!filled) {
|
||||
x = lastx;
|
||||
y = lasty;
|
||||
drawVLine(rect.left-x+r-stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
|
||||
drawVLine(rect.right+x-r+stop, rect.top+y+r, rect.bottom-y-r, color, plotProc, data);
|
||||
}
|
||||
|
||||
for (int i = 0; i < dx; i++) {
|
||||
if (filled) {
|
||||
drawVLine(rect.left + r + i, rect.top, rect.bottom, color, plotProc, data);
|
||||
} else {
|
||||
(*plotProc)(rect.left + r + i, rect.top, color, data);
|
||||
(*plotProc)(rect.left + r + i, rect.bottom, color, data);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Based on public-domain code by Darel Rex Finley, 2007
|
||||
// http://alienryderflex.com/polygon_fill/
|
||||
void drawPolygonScan(int *polyX, int *polyY, int npoints, Common::Rect &bbox, int color, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
int *nodeX = (int *)calloc(npoints, sizeof(int));
|
||||
int i, j;
|
||||
|
||||
// Loop through the rows of the image.
|
||||
for (int pixelY = bbox.top; pixelY < bbox.bottom; pixelY++) {
|
||||
// Build a list of nodes.
|
||||
int nodes = 0;
|
||||
j = npoints - 1;
|
||||
|
||||
for (i = 0; i < npoints; i++) {
|
||||
if ((polyY[i] < pixelY && polyY[j] >= pixelY) || (polyY[j] < pixelY && polyY[i] >= pixelY)) {
|
||||
nodeX[nodes++] = (int)(polyX[i] + (double)(pixelY - polyY[i]) / (double)(polyY[j]-polyY[i]) *
|
||||
(double)(polyX[j] - polyX[i]) + 0.5);
|
||||
}
|
||||
j = i;
|
||||
}
|
||||
|
||||
// Sort the nodes, via a simple “Bubble” sort.
|
||||
i = 0;
|
||||
while (i < nodes - 1) {
|
||||
if (nodeX[i] > nodeX[i + 1]) {
|
||||
SWAP(nodeX[i], nodeX[i + 1]);
|
||||
if (i)
|
||||
i--;
|
||||
} else {
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
// Fill the pixels between node pairs.
|
||||
for (i = 0; i < nodes; i += 2) {
|
||||
if (nodeX[i ] >= bbox.right)
|
||||
break;
|
||||
if (nodeX[i + 1] > bbox.left) {
|
||||
nodeX[i] = MAX<int16>(nodeX[i], bbox.left);
|
||||
nodeX[i + 1] = MIN<int16>(nodeX[i + 1], bbox.right);
|
||||
|
||||
drawHLine(nodeX[i], nodeX[i + 1], pixelY, color, plotProc, data);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
free(nodeX);
|
||||
}
|
||||
|
||||
// http://members.chello.at/easyfilter/bresenham.html
|
||||
void drawEllipse(int x0, int y0, int x1, int y1, int color, bool filled, void (*plotProc)(int, int, int, void *), void *data) {
|
||||
int a = abs(x1-x0), b = abs(y1-y0), b1 = b&1; /* values of diameter */
|
||||
long dx = 4*(1-a)*b*b, dy = 4*(b1+1)*a*a; /* error increment */
|
||||
long err = dx+dy+b1*a*a, e2; /* error of 1.step */
|
||||
|
||||
if (x0 > x1) { x0 = x1; x1 += a; } /* if called with swapped points */
|
||||
if (y0 > y1) y0 = y1; /* .. exchange them */
|
||||
y0 += (b+1)/2; y1 = y0-b1; /* starting pixel */
|
||||
a *= 8*a; b1 = 8*b*b;
|
||||
|
||||
do {
|
||||
if (filled) {
|
||||
drawHLine(x0, x1, y0, color, plotProc, data);
|
||||
drawHLine(x0, x1, y1, color, plotProc, data);
|
||||
} else {
|
||||
(*plotProc)(x1, y0, color, data); /* I. Quadrant */
|
||||
(*plotProc)(x0, y0, color, data); /* II. Quadrant */
|
||||
(*plotProc)(x0, y1, color, data); /* III. Quadrant */
|
||||
(*plotProc)(x1, y1, color, data); /* IV. Quadrant */
|
||||
}
|
||||
e2 = 2*err;
|
||||
if (e2 <= dy) { y0++; y1--; err += dy += a; } /* y step */
|
||||
if (e2 >= dx || 2*err > dy) { x0++; x1--; err += dx += b1; } /* x step */
|
||||
} while (x0 <= x1);
|
||||
|
||||
while (y0-y1 < b) { /* too early stop of flat ellipses a=1 */
|
||||
if (filled) {
|
||||
drawHLine(x0-1, x0-1, y0, color, plotProc, data); /* -> finish tip of ellipse */
|
||||
drawHLine(x1+1, x1+1, y0, color, plotProc, data);
|
||||
drawHLine(x0-1, x0-1, y1, color, plotProc, data);
|
||||
drawHLine(x1+1, x1+1, y1, color, plotProc, data);
|
||||
} else {
|
||||
(*plotProc)(x0-1, y0, color, data); /* -> finish tip of ellipse */
|
||||
(*plotProc)(x1+1, y0, color, data);
|
||||
(*plotProc)(x0-1, y1, color, data);
|
||||
(*plotProc)(x1+1, y1, color, data);
|
||||
}
|
||||
y0++;
|
||||
y1--;
|
||||
}
|
||||
}
|
||||
|
||||
} // End of namespace Graphics
|
||||
|
|
|
|||
|
|
@ -23,10 +23,21 @@
|
|||
#ifndef GRAPHICS_PRIMITIVES_H
|
||||
#define GRAPHICS_PRIMITIVES_H
|
||||
|
||||
#include "common/rect.h"
|
||||
|
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namespace Graphics {
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|
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void drawLine(int x0, int y0, int x1, int y1, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawHLine(int x1, int x2, int y, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawVLine(int x, int y1, int y2, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawThickLine(int x0, int y0, int x1, int y1, int penX, int penY, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawThickLine2(int x1, int y1, int x2, int y2, int thick, int color,
|
||||
void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawFilledRect(Common::Rect &rect, int color, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawRoundRect(Common::Rect &rect, int arc, int color, bool filled, void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawPolygonScan(int *polyX, int *polyY, int npoints, Common::Rect &bbox, int color,
|
||||
void (*plotProc)(int, int, int, void *), void *data);
|
||||
void drawEllipse(int x0, int y0, int x1, int y1, int color, bool filled, void (*plotProc)(int, int, int, void *), void *data);
|
||||
|
||||
} // End of namespace Graphics
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue