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Some cleanups, fix for the blending code
Original commit message from CVS: Some cleanups, fix for the blending code
This commit is contained in:
Wim Taymans
parent
ce94093ed4
commit
9b7b00ac24
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@ -275,7 +275,7 @@ gst_smpte_blend_i420 (guint8 *in1, guint8 *in2, guint8 *out, GstMask *mask,
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{
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guint32 *maskp;
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gint value;
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gint i;
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gint i, j;
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gint min, max;
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guint8 *in1u, *in1v, *in2u, *in2v, *outu, *outv;
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gint lumsize = width * height;
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@ -286,20 +286,22 @@ gst_smpte_blend_i420 (guint8 *in1, guint8 *in2, guint8 *out, GstMask *mask,
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min = pos - border;
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max = pos;
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in1u = in1 + lumsize; in1v = in1 + chromsize;
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in2u = in2 + lumsize; in2v = in2 + chromsize;
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outu = out + lumsize; outv = out + chromsize;
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in1u = in1 + lumsize; in1v = in1u + chromsize;
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in2u = in2 + lumsize; in2v = in2u + chromsize;
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outu = out + lumsize; outv = outu + chromsize;
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maskp = mask->data;
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for (i = lumsize; i; i--) {
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value = *maskp++;
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value = ((CLAMP (value, min, max) - min) << 8) / border;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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value = *maskp++;
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value = ((CLAMP (value, min, max) - min) << 8) / border;
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*out++ = ((*in1++ * value) + (*in2++ * (255 - value))) >> 8;
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if (i % 4) {
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*outu++ = ((*in1u++ * value) + (*in2u++ * (255 - value))) >> 8;
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*outv++ = ((*in1v++ * value) + (*in2v++ * (255 - value))) >> 8;
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*out++ = ((*in1++ * value) + (*in2++ * (256 - value))) >> 8;
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if (!(i & 1) && !(j & 1)) {
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*outu++ = ((*in1u++ * value) + (*in2u++ * (256 - value))) >> 8;
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*outv++ = ((*in1v++ * value) + (*in2v++ * (256 - value))) >> 8;
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}
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}
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}
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}
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@ -204,44 +204,46 @@ gst_smpte_paint_triangle_linear (guint32 *dest, gint stride,
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}
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}
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void
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draw_line (guint32* dest, gint stride, int x, int y, int x2, int y2, int col)
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static void
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draw_bresenham_line (guint32 *dest, gint stride,
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gint x0, gint y0,
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gint x1, gint y1,
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guint32 col)
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{
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gboolean yLonger=FALSE;
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int incrementVal, endVal;
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gdouble decInc;
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int shortLen=y2-y;
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int longLen=x2-x;
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gdouble j=0.0;
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int i;
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gint dx = abs (x1 - x0);
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gint dy = abs (y1 - y0);
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gint x_incr, y_incr;
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gint i, dpr, dpru, P, indep;
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if (abs(shortLen)>abs(longLen)) {
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int swap=shortLen;
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shortLen=longLen;
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longLen=swap;
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yLonger=TRUE;
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dest = dest + y0 * stride + x0;
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x_incr = SIGN (x1 - x0);
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y_incr = SIGN (y1 - y0) * stride;
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if (dx >= dy) {
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dpr = dy << 1;
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i = dx;
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indep = x_incr;
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}
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else {
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dpr = dx << 1;
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i = dy;
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indep = y_incr;
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}
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endVal=longLen;
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if (longLen<0) {
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incrementVal=-1;
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longLen=-longLen;
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}
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else incrementVal=1;
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if (longLen==0) decInc=(gdouble)shortLen;
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else decInc = ((gdouble)shortLen/(gdouble)longLen);
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if (yLonger) {
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for (i=0;i!=endVal;i+=incrementVal) {
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*(dest+(x+(int)j) + (y+i)*stride) = col;
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j+=decInc;
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}
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} else {
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for (i=0;i!=endVal;i+=incrementVal) {
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*(dest+(x+i) + (y+(int)j)*stride) = col;
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j+=decInc;
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dpru = dpr - (i << 1);
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P = dpr - i;
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for (; i >= 0; i--) {
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*dest = col;
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if (P > 0) {
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dest += x_incr;
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dest += y_incr;
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P += dpru;
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} else {
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dest += indep;
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P += dpr;
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}
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}
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}
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@ -255,44 +257,41 @@ gst_smpte_paint_triangle_clock (guint32 *dest, gint stride,
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gint i;
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gint sign;
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gfloat angle, angle_s, angle_e;
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gfloat len1;
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angle_s = 0.0;
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angle_e = acos (((x1-x0) * (x2-x0) + (y1-y0) * (y2-y0))/
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(sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) *
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sqrt ((x2-x0) * (x2-x0) + (y2-y0) * (y2-y0))));
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if (x1 == x2) {
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gfloat len1 = sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0));
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len1 = sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0));
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if (x1 == x2) {
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sign = SIGN (y2 - y1);
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for (i=y1; i != y2+sign; i+=sign) {
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gfloat len2 = sqrt ((x1-x0) * (x1-x0) + (i-y0) * (i-y0));
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if (y1==i)
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for (i = y1; i != (y2 + sign); i += sign) {
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if (y1 == i)
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angle = 0;
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else
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angle = acos (((x1-x0) * (x2-x0) + (y1-y0) * (i-y0))/ (len1 * len2)) / angle_e;
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angle = acos (((x1-x0) * (x2-x0) + (y1-y0) * (i-y0)) /
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(len1 * sqrt ((x1-x0) * (x1-x0) + (i-y0) * (i-y0)))) / angle_e;
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draw_line (dest, stride,
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draw_bresenham_line (dest, stride,
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x0, y0, x1, i,
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(c2 * angle + c1 * (1.0-angle)));
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}
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}
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else if (y1 == y2) {
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gfloat len1 = sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0));
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sign = SIGN (x2 - x1);
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for (i=x1; i != x2+sign; i+=sign) {
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gfloat len2 = sqrt ((i-x0) * (i-x0) + (y2-y0) * (y2-y0));
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if (x1==i)
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for (i = x1; i != (x2 + sign); i += sign) {
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if (x1 == i)
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angle = 0;
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else
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angle = acos (((x1-x0) * (i-x0) + (y1-y0) * (y2-y0)) / (len1 * len2)) / angle_e;
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angle = acos (((x1-x0) * (i-x0) + (y1-y0) * (y2-y0)) /
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(len1 * sqrt ((i-x0) * (i-x0) + (y2-y0) * (y2-y0)))) / angle_e;
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draw_line (dest, stride,
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draw_bresenham_line (dest, stride,
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x0, y0, i, y1,
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(c2 * angle + c1 * (1.0-angle)));
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}
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@ -305,35 +304,34 @@ gst_smpte_paint_box_clock (guint32 *dest, gint stride,
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gint x1, gint y1, gint c1,
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gint x2, gint y2, gint c2)
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{
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gfloat angle_m;
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gfloat angle_m, col_m;
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gint xv, yv;
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if (x1 == x0) {
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angle_m = 2* acos (((x1-x0) * (x2-x0) + (y1-y0) * (y1-y0))/
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if (x1 == x0) {
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xv = x2;
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yv = y1;
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} else if (y1 == y0) {
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xv = x1;
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yv = y2;
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}
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else {
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g_warning ("paint box clock: not supported");
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return;
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}
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angle_m = 2 * acos (((x1-x0) * (xv-x0) + (y1-y0) * (yv-y0))/
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(sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) *
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sqrt ((x2-x0) * (x2-x0) + (y1-y0) * (y1-y0)))) / M_PI;
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sqrt ((xv-x0) * (xv-x0) + (yv-y0) * (yv-y0)))) / M_PI;
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x1, y1, c1,
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x2, y1, (c2 * angle_m + c1 * (1.0-angle_m)));
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x2, y1, (c2 * angle_m + c1 * (1.0-angle_m)),
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x2, y2, c2);
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}
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else if (y1 == y0) {
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angle_m = 2* acos (((x1-x0) * (x1-x0) + (y1-y0) * (y2-y0))/
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(sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) *
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sqrt ((x1-x0) * (x1-x0) + (y2-y0) * (y2-y0)))) / M_PI;
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col_m = c2 * angle_m + c1 * (1.0-angle_m);
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gst_smpte_paint_triangle_clock (dest, stride,
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x1, y1, c1,
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x1, y2, (c2 * angle_m + c1 * (1.0-angle_m)));
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gst_smpte_paint_triangle_clock (dest, stride,
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xv, yv, col_m);
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x1, y2, (c2 * angle_m + c1 * (1.0-angle_m)),
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xv, yv, col_m,
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x2, y2, c2);
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}
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}
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