diff options
Diffstat (limited to 'gst/smpte/paint.c')
| -rw-r--r-- | gst/smpte/paint.c | 162 |
1 files changed, 76 insertions, 86 deletions
diff --git a/gst/smpte/paint.c b/gst/smpte/paint.c index dae3c6f1..fdff77e5 100644 --- a/gst/smpte/paint.c +++ b/gst/smpte/paint.c @@ -26,21 +26,20 @@ #include "paint.h" void -gst_smpte_paint_vbox (guint32 *dest, gint stride, - gint x0, gint y0, gint c0, - gint x1, gint y1, gint c1) +gst_smpte_paint_vbox (guint32 * dest, gint stride, + gint x0, gint y0, gint c0, gint x1, gint y1, gint c1) { gint i, j; gint width, height; width = x1 - x0; height = y1 - y0; - + g_assert (width > 0); g_assert (height > 0); dest = dest + y0 * stride + x0; - + for (i = 0; i < height; i++) { for (j = 0; j < width; j++) { dest[j] = (c1 * j + c0 * (width - j)) / width; @@ -50,16 +49,15 @@ gst_smpte_paint_vbox (guint32 *dest, gint stride, } void -gst_smpte_paint_hbox (guint32 *dest, gint stride, - gint x0, gint y0, gint c0, - gint x1, gint y1, gint c1) +gst_smpte_paint_hbox (guint32 * dest, gint stride, + gint x0, gint y0, gint c0, gint x1, gint y1, gint c1) { gint i, j; gint width, height; width = x1 - x0; height = y1 - y0; - + g_assert (width > 0); g_assert (height > 0); @@ -68,7 +66,8 @@ gst_smpte_paint_hbox (guint32 *dest, gint stride, dest = dest + y0 * stride + x0; for (i = 0; i < height; i++) { - guint32 value = (c1 * i + c0 * (height - i)) / height; + guint32 value = (c1 * i + c0 * (height - i)) / height; + for (j = 0; j < width; j++) { dest[j] = value; } @@ -148,29 +147,35 @@ G_STMT_START { \ } G_STMT_END void -gst_smpte_paint_triangle_linear (guint32 *dest, gint stride, - gint x0, gint y0, gint c0, - gint x1, gint y1, gint c1, gint x2, gint y2, gint c2) +gst_smpte_paint_triangle_linear (guint32 * dest, gint stride, + gint x0, gint y0, gint c0, + gint x1, gint y1, gint c1, gint x2, gint y2, gint c2) { gint sdxl, sdyl, sdcl, dxlabs, dylabs, dclabs, xrl, yrl, crl, pxl, pyl, pcl; gint sdxr, sdyr, sdcr, dxrabs, dyrabs, dcrabs, xrr, yrr, crr, pxr, pyr, pcr; gint i, j, k, seg_start, seg_end; - if (y0 > y1) { SWAP_INT (x0, x1); SWAP_INT (y0, y1); SWAP_INT (c0, c1); } - if (y0 > y2) { SWAP_INT (x0, x2); SWAP_INT (y0, y2); SWAP_INT (c0, c2); } - if (y1 > y2) { SWAP_INT (x1, x2); SWAP_INT (y1, y2); SWAP_INT (c1, c2); } - - PREPARE_3D_LINE (x0,y0,c0,x2,y2,c2, - dxlabs,dylabs,dclabs, - sdxl, sdyl,sdcl, - xrl,yrl,crl, - pxl,pyl,pcl); - - PREPARE_3D_LINE (x0,y0,c0,x1,y1,c1, - dxrabs,dyrabs,dcrabs, - sdxr, sdyr,sdcr, - xrr,yrr,crr, - pxr,pyr,pcr); + if (y0 > y1) { + SWAP_INT (x0, x1); + SWAP_INT (y0, y1); + SWAP_INT (c0, c1); + } + if (y0 > y2) { + SWAP_INT (x0, x2); + SWAP_INT (y0, y2); + SWAP_INT (c0, c2); + } + if (y1 > y2) { + SWAP_INT (x1, x2); + SWAP_INT (y1, y2); + SWAP_INT (c1, c2); + } + + PREPARE_3D_LINE (x0, y0, c0, x2, y2, c2, + dxlabs, dylabs, dclabs, sdxl, sdyl, sdcl, xrl, yrl, crl, pxl, pyl, pcl); + + PREPARE_3D_LINE (x0, y0, c0, x1, y1, c1, + dxrabs, dyrabs, dcrabs, sdxr, sdyr, sdcr, xrr, yrr, crr, pxr, pyr, pcr); dest = dest + stride * y0; seg_start = y0; @@ -183,37 +188,32 @@ gst_smpte_paint_triangle_linear (guint32 *dest, gint stride, gint sign = SIGN (e - s); e += sign; - for (j = s; j != e; j+=sign) { - dest[j] = (ec * (j - s) + sc * (e - j)) / (e - s); + for (j = s; j != e; j += sign) { + dest[j] = (ec * (j - s) + sc * (e - j)) / (e - s); } while (pyr == i) { - STEP_3D_LINE (dxrabs, dyrabs, dcrabs, sdxr, sdyr, sdcr, - xrr, yrr, crr, pxr, pyr, pcr); + STEP_3D_LINE (dxrabs, dyrabs, dcrabs, sdxr, sdyr, sdcr, + xrr, yrr, crr, pxr, pyr, pcr); } while (pyl == i) { - STEP_3D_LINE (dxlabs, dylabs, dclabs, sdxl, sdyl, sdcl, - xrl, yrl, crl, pxl, pyl, pcl); + STEP_3D_LINE (dxlabs, dylabs, dclabs, sdxl, sdyl, sdcl, + xrl, yrl, crl, pxl, pyl, pcl); } dest += stride; } - PREPARE_3D_LINE (x1,y1,c1,x2,y2,c2, - dxrabs,dyrabs,dcrabs, - sdxr, sdyr,sdcr, - xrr,yrr,crr, - pxr,pyr,pcr); + PREPARE_3D_LINE (x1, y1, c1, x2, y2, c2, + dxrabs, dyrabs, dcrabs, sdxr, sdyr, sdcr, xrr, yrr, crr, pxr, pyr, pcr); seg_start = y1; seg_end = y2; } } -static void -draw_bresenham_line (guint32 *dest, gint stride, - gint x0, gint y0, - gint x1, gint y1, - guint32 col) +static void +draw_bresenham_line (guint32 * dest, gint stride, + gint x0, gint y0, gint x1, gint y1, guint32 col) { gint dx = abs (x1 - x0); gint dy = abs (y1 - y0); @@ -224,13 +224,12 @@ draw_bresenham_line (guint32 *dest, gint stride, x_incr = SIGN (x1 - x0); y_incr = SIGN (y1 - y0) * stride; - - if (dx >= dy) { + + if (dx >= dy) { dpr = dy << 1; i = dx; indep = x_incr; - } - else { + } else { dpr = dx << 1; i = dy; indep = y_incr; @@ -242,7 +241,7 @@ draw_bresenham_line (guint32 *dest, gint stride, for (; i >= 0; i--) { *dest = col; - if (P > 0) { + if (P > 0) { dest += x_incr; dest += y_incr; P += dpru; @@ -254,10 +253,9 @@ draw_bresenham_line (guint32 *dest, gint stride, } void -gst_smpte_paint_triangle_clock (guint32 *dest, gint stride, - gint x0, gint y0, gint c0, - gint x1, gint y1, gint c1, - gint x2, gint y2, gint c2) +gst_smpte_paint_triangle_clock (guint32 * dest, gint stride, + gint x0, gint y0, gint c0, + gint x1, gint y1, gint c1, gint x2, gint y2, gint c2) { gint i; gint sign; @@ -265,11 +263,11 @@ gst_smpte_paint_triangle_clock (guint32 *dest, gint stride, gfloat len1; angle_s = 0.0; - angle_e = acos (((x1-x0) * (x2-x0) + (y1-y0) * (y2-y0))/ - (sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) * - sqrt ((x2-x0) * (x2-x0) + (y2-y0) * (y2-y0)))); + angle_e = acos (((x1 - x0) * (x2 - x0) + (y1 - y0) * (y2 - y0)) / + (sqrt ((x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0)) * + sqrt ((x2 - x0) * (x2 - x0) + (y2 - y0) * (y2 - y0)))); - len1 = sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)); + len1 = sqrt ((x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0)); if (x1 == x2) { sign = SIGN (y2 - y1); @@ -278,65 +276,57 @@ gst_smpte_paint_triangle_clock (guint32 *dest, gint stride, if (y1 == i) angle = 0; else - angle = acos (((x1-x0) * (x2-x0) + (y1-y0) * (i-y0)) / - (len1 * sqrt ((x1-x0) * (x1-x0) + (i-y0) * (i-y0)))) / angle_e; + angle = acos (((x1 - x0) * (x2 - x0) + (y1 - y0) * (i - y0)) / + (len1 * sqrt ((x1 - x0) * (x1 - x0) + (i - y0) * (i - + y0)))) / angle_e; draw_bresenham_line (dest, stride, - x0, y0, x1, i, - (c2 * angle + c1 * (1.0-angle))); + x0, y0, x1, i, (c2 * angle + c1 * (1.0 - angle))); } - } - else if (y1 == y2) { + } else if (y1 == y2) { sign = SIGN (x2 - x1); for (i = x1; i != (x2 + sign); i += sign) { if (x1 == i) angle = 0; else - angle = acos (((x1-x0) * (i-x0) + (y1-y0) * (y2-y0)) / - (len1 * sqrt ((i-x0) * (i-x0) + (y2-y0) * (y2-y0)))) / angle_e; + angle = acos (((x1 - x0) * (i - x0) + (y1 - y0) * (y2 - y0)) / + (len1 * sqrt ((i - x0) * (i - x0) + (y2 - y0) * (y2 - + y0)))) / angle_e; draw_bresenham_line (dest, stride, - x0, y0, i, y1, - (c2 * angle + c1 * (1.0-angle))); + x0, y0, i, y1, (c2 * angle + c1 * (1.0 - angle))); } } } void -gst_smpte_paint_box_clock (guint32 *dest, gint stride, - gint x0, gint y0, gint c0, - gint x1, gint y1, gint c1, - gint x2, gint y2, gint c2) +gst_smpte_paint_box_clock (guint32 * dest, gint stride, + gint x0, gint y0, gint c0, + gint x1, gint y1, gint c1, gint x2, gint y2, gint c2) { gfloat angle_m, col_m; gint xv, yv; - if (x1 == x0) { + if (x1 == x0) { xv = x2; yv = y1; } else if (y1 == y0) { xv = x1; yv = y2; - } - else { + } else { g_warning ("paint box clock: not supported"); return; } - angle_m = 2 * acos (((x1-x0) * (xv-x0) + (y1-y0) * (yv-y0))/ - (sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) * - sqrt ((xv-x0) * (xv-x0) + (yv-y0) * (yv-y0)))) / M_PI; - - col_m = c2 * angle_m + c1 * (1.0-angle_m); + angle_m = 2 * acos (((x1 - x0) * (xv - x0) + (y1 - y0) * (yv - y0)) / + (sqrt ((x1 - x0) * (x1 - x0) + (y1 - y0) * (y1 - y0)) * + sqrt ((xv - x0) * (xv - x0) + (yv - y0) * (yv - y0)))) / M_PI; + + col_m = c2 * angle_m + c1 * (1.0 - angle_m); gst_smpte_paint_triangle_clock (dest, stride, - x0, y0, c0, - x1, y1, c1, - xv, yv, col_m); + x0, y0, c0, x1, y1, c1, xv, yv, col_m); gst_smpte_paint_triangle_clock (dest, stride, - x0, y0, c0, - xv, yv, col_m, - x2, y2, c2); + x0, y0, c0, xv, yv, col_m, x2, y2, c2); } - |