diff options
Diffstat (limited to 'draw/meshdraw.c')
| -rw-r--r-- | draw/meshdraw.c | 141 |
1 files changed, 116 insertions, 25 deletions
diff --git a/draw/meshdraw.c b/draw/meshdraw.c index 74035cfd..df4dfe41 100644 --- a/draw/meshdraw.c +++ b/draw/meshdraw.c @@ -310,39 +310,90 @@ fz_drawtriangle(fz_pixmap *pix, float *av, float *bv, float *cv, int n, fz_bbox * mesh drawing */ -void -fz_rendershade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox) +#define HUGENUM 32000 + +static void +fz_renderlinear(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox) +{ + float v[4][3]; + float e[2][3]; + fz_point p0, p1; + float theta; + + p0.x = shade->mesh[0]; + p0.y = shade->mesh[1]; + p0 = fz_transformpoint(ctm, p0); + + p1.x = shade->mesh[3]; + p1.y = shade->mesh[4]; + p1 = fz_transformpoint(ctm, p1); + + theta = atan2f(p1.y - p0.y, p1.x - p0.x); + theta += (float)M_PI * 0.5f; + + v[0][0] = p0.x + HUGENUM * cosf(theta); + v[0][1] = p0.y + HUGENUM * sinf(theta); + v[0][2] = 0; + + v[1][0] = p1.x + HUGENUM * cosf(theta); + v[1][1] = p1.y + HUGENUM * sinf(theta); + v[1][2] = 255; + + v[2][0] = p0.x - HUGENUM * cosf(theta); + v[2][1] = p0.y - HUGENUM * sinf(theta); + v[2][2] = 0; + + v[3][0] = p1.x - HUGENUM * cosf(theta); + v[3][1] = p1.y - HUGENUM * sinf(theta); + v[3][2] = 255; + + fz_drawtriangle(dest, v[0], v[1], v[2], 3, bbox); + fz_drawtriangle(dest, v[1], v[2], v[3], 3, bbox); + + if (shade->extend[0]) + { + e[0][0] = v[0][0] - (p1.x - p0.x) * HUGENUM; + e[0][1] = v[0][1] - (p1.y - p0.y) * HUGENUM; + e[0][2] = v[0][2]; + + e[1][0] = v[2][0] - (p1.x - p0.x) * HUGENUM; + e[1][1] = v[2][1] - (p1.y - p0.y) * HUGENUM; + e[1][2] = v[2][2]; + + fz_drawtriangle(dest, e[0], v[0], v[2], 3, bbox); + fz_drawtriangle(dest, e[0], v[2], e[1], 3, bbox); + } + + if (shade->extend[1]) + { + e[0][0] = v[1][0] + (p1.x - p0.x) * HUGENUM; + e[0][1] = v[1][1] + (p1.y - p0.y) * HUGENUM; + e[0][2] = v[1][2]; + + e[1][0] = v[3][0] + (p1.x - p0.x) * HUGENUM; + e[1][1] = v[3][1] + (p1.y - p0.y) * HUGENUM; + e[1][2] = v[3][2]; + + fz_drawtriangle(dest, e[0], v[1], v[3], 3, bbox); + fz_drawtriangle(dest, e[0], v[3], e[1], 3, bbox); + } +} + +static void +fz_rendermesh(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox) { - unsigned char clut[256][FZ_MAXCOLORS]; - fz_pixmap *temp, *conv; - float color[FZ_MAXCOLORS]; float tri[3][MAXN]; fz_point p; float *mesh; int ntris; - int i, j, k; + int i, k; - ctm = fz_concat(shade->matrix, ctm); mesh = shade->mesh; if (shade->usefunction) - { - for (i = 0; i < 256; i++) - { - fz_convertcolor(shade->cs, shade->function[i], dest->colorspace, color); - for (k = 0; k < dest->colorspace->n; k++) - clut[i][k] = color[k] * 255; - } - conv = fz_newpixmapwithrect(dest->colorspace, bbox); - temp = fz_newpixmapwithrect(fz_devicegray, bbox); - fz_clearpixmap(temp); ntris = shade->meshlen / 9; - } else - { - temp = dest; ntris = shade->meshlen / ((2 + shade->cs->n) * 3); - } while (ntris--) { @@ -357,13 +408,52 @@ fz_rendershade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox) tri[k][2] = *mesh++ * 255; else { - fz_convertcolor(shade->cs, mesh, temp->colorspace, tri[k] + 2); - for (j = 0; j < temp->colorspace->n; j++) - tri[k][j + 2] *= 255; + fz_convertcolor(shade->cs, mesh, dest->colorspace, tri[k] + 2); + for (i = 0; i < dest->colorspace->n; i++) + tri[k][i + 2] *= 255; mesh += shade->cs->n; } } - fz_drawtriangle(temp, tri[0], tri[1], tri[2], 2 + temp->colorspace->n, bbox); + fz_drawtriangle(dest, tri[0], tri[1], tri[2], 2 + dest->colorspace->n, bbox); + } +} + +void +fz_rendershade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox) +{ + unsigned char clut[256][FZ_MAXCOLORS]; + fz_pixmap *temp, *conv; + float color[FZ_MAXCOLORS]; + int i, k; + + ctm = fz_concat(shade->matrix, ctm); + + if (shade->usefunction) + { + for (i = 0; i < 256; i++) + { + fz_convertcolor(shade->cs, shade->function[i], dest->colorspace, color); + for (k = 0; k < dest->colorspace->n; k++) + clut[i][k] = color[k] * 255; + } + conv = fz_newpixmapwithrect(dest->colorspace, bbox); + temp = fz_newpixmapwithrect(fz_devicegray, bbox); + fz_clearpixmap(temp); + } + else + { + temp = dest; + } + + switch (shade->type) + { + case FZ_LINEAR: + fz_renderlinear(shade, ctm, temp, bbox); + break; + /* TODO: FZ_RADIAL */ + case FZ_MESH: + fz_rendermesh(shade, ctm, temp, bbox); + break; } if (shade->usefunction) @@ -384,3 +474,4 @@ fz_rendershade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox) fz_droppixmap(temp); } } + |