1 files changed, 122 insertions, 0 deletions
diff --git a/raster/pixmap.c b/raster/pixmap.c
new file mode 100644
index 00000000..8f34ebcd
--- /dev/null
+++ b/raster/pixmap.c
@@ -0,0 +1,122 @@
+#include <fitz.h>
+
+fz_error *
+fz_newpixmap(fz_pixmap **pixp, int x, int y, int w, int h, int n)
+{
+	fz_pixmap *pix;
+
+	pix = *pixp = fz_malloc(sizeof(fz_pixmap));
+	if (!pix)
+		return fz_outofmem;
+
+	pix->x = x;
+	pix->y = y;
+	pix->w = w;
+	pix->h = h;
+	pix->n = n;
+
+	pix->samples = fz_malloc(pix->w * pix->h * pix->n * sizeof(fz_sample));
+	if (!pix->samples) {
+		fz_free(pix);
+		return fz_outofmem;
+	}
+
+	return nil;
+}
+
+fz_error *
+fz_newpixmapwithrect(fz_pixmap **pixp, fz_irect r, int n)
+{
+	return fz_newpixmap(pixp,
+				r.x0, r.y0,
+				r.x1 - r.x0,
+				r.y1 - r.y0, n);
+}
+
+fz_error *
+fz_newpixmapcopy(fz_pixmap **pixp, fz_pixmap *old)
+{
+	fz_error *error;
+	error = fz_newpixmap(pixp, old->x, old->y, old->w, old->h, old->n);
+	if (error)
+		return error;
+	memcpy((*pixp)->samples, old->samples, old->w * old->h * old->n);
+	return nil;
+}
+
+void
+fz_droppixmap(fz_pixmap *pix)
+{
+	fz_free(pix->samples);
+	fz_free(pix);
+}
+
+void
+fz_clearpixmap(fz_pixmap *pix)
+{
+	memset(pix->samples, 0, pix->w * pix->h * pix->n * sizeof(fz_sample));
+}
+
+void
+fz_gammapixmap(fz_pixmap *pix, float gamma)
+{
+	unsigned char table[255];
+	int n = pix->w * pix->h * pix->n;
+	unsigned char *p = pix->samples;
+	int i;
+	for (i = 0; i < 256; i++)
+		table[i] = CLAMP(pow(i / 255.0, gamma) * 255.0, 0, 255);
+	while (n--)
+		*p = table[*p]; p++;
+}
+
+void
+fz_debugpixmap(fz_pixmap *pix)
+{
+	if (pix->n == 4)
+	{
+		int x, y;
+		FILE *ppm = fopen("out.ppm", "wb");
+		FILE *pgm = fopen("out.pgm", "wb");
+		fprintf(ppm, "P6\n%d %d\n255\n", pix->w, pix->h);
+		fprintf(pgm, "P5\n%d %d\n255\n", pix->w, pix->h);
+
+		for (y = 0; y < pix->h; y++)
+			for (x = 0; x < pix->w; x++)
+			{
+				int a = pix->samples[x * pix->n + y * pix->w * pix->n + 0];
+				int r = pix->samples[x * pix->n + y * pix->w * pix->n + 1];
+				int g = pix->samples[x * pix->n + y * pix->w * pix->n + 2];
+				int b = pix->samples[x * pix->n + y * pix->w * pix->n + 3];
+				putc(a, pgm);
+				putc(r, ppm);
+				putc(g, ppm);
+				putc(b, ppm);
+			}
+		fclose(ppm);
+		fclose(pgm);
+	}
+
+	else if (pix->n == 2)
+	{
+		int x, y;
+		FILE *pgm = fopen("out.pgm", "wb");
+		fprintf(pgm, "P5\n%d %d\n255\n", pix->w, pix->h);
+
+		for (y = 0; y < pix->h; y++)
+			for (x = 0; x < pix->w; x++)
+			{
+				putc(pix->samples[y * pix->w * 2 + x * 2 + 1], pgm);
+			}
+		fclose(pgm);
+	}
+
+	else if (pix->n == 1)
+	{
+		FILE *pgm = fopen("out.pgm", "w");
+		fprintf(pgm, "P5\n%d %d\n255\n", pix->w, pix->h);
+		fwrite(pix->samples, 1, pix->w * pix->h, pgm);
+		fclose(pgm);
+	}
+}
+