Move fz_pixmap from draw directory to fitz.

1 files changed, 187 insertions, 0 deletions

diff --git a/fitz/res_pixmap.c b/fitz/res_pixmap.c
new file mode 100644
index 00000000..dd42fb31
--- /dev/null
+++ b/fitz/res_pixmap.c
@@ -0,0 +1,187 @@
+#include "fitz.h"
+
+fz_pixmap *
+fz_newpixmap(fz_colorspace *colorspace, int x, int y, int w, int h)
+{
+	fz_pixmap *pix;
+
+	pix = fz_malloc(sizeof(fz_pixmap));
+	pix->refs = 1;
+	pix->x = x;
+	pix->y = y;
+	pix->w = w;
+	pix->h = h;
+	pix->colorspace = nil;
+	pix->n = 1;
+
+	if (colorspace)
+	{
+		pix->colorspace = fz_keepcolorspace(colorspace);
+		pix->n = 1 + colorspace->n;
+	}
+
+	pix->samples = fz_malloc(pix->w * pix->h * pix->n);
+
+	return pix;
+}
+
+fz_pixmap *
+fz_newpixmapwithrect(fz_colorspace *colorspace, fz_irect r)
+{
+	return fz_newpixmap(colorspace, r.x0, r.y0, r.x1 - r.x0, r.y1 - r.y0);
+}
+
+fz_pixmap *
+fz_keeppixmap(fz_pixmap *pix)
+{
+	pix->refs++;
+	return pix;
+}
+
+void
+fz_droppixmap(fz_pixmap *pix)
+{
+	if (pix && --pix->refs == 0)
+	{
+		if (pix->colorspace)
+			fz_dropcolorspace(pix->colorspace);
+		fz_free(pix->samples);
+		fz_free(pix);
+	}
+}
+
+void
+fz_clearpixmap(fz_pixmap *pix, unsigned char value)
+{
+	memset(pix->samples, value, pix->w * pix->h * pix->n);
+}
+
+void
+fz_gammapixmap(fz_pixmap *pix, float gamma)
+{
+	unsigned char table[256];
+	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, char *prefix)
+{
+	static int counter = 0;
+	char colorname[40];
+	char alphaname[40];
+	FILE *color = NULL;
+	FILE *alpha = NULL;
+	int x, y;
+
+	sprintf(alphaname, "%s-%04d-alpha.pgm", prefix, counter);
+	alpha = fopen(alphaname, "wb");
+	if (!alpha)
+		goto cleanup;
+
+	fprintf(stderr, "saving debug pixmap %s - %d\n", prefix, counter);
+
+	if (pix->n > 1)
+	{
+		if (pix->n > 2)
+			sprintf(colorname, "%s-%04d-color.ppm", prefix, counter);
+		else
+			sprintf(colorname, "%s-%04d-color.pgm", prefix, counter);
+
+		color = fopen(colorname, "wb");
+		if (!color)
+			goto cleanup;
+	}
+
+	counter ++;
+
+	if (pix->n == 5)
+	{
+		fprintf(alpha, "P5\n%d %d\n255\n", pix->w, pix->h);
+		fprintf(color, "P6\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 cc = pix->samples[x * pix->n + y * pix->w * pix->n + 1];
+				int mm = pix->samples[x * pix->n + y * pix->w * pix->n + 2];
+				int yy = pix->samples[x * pix->n + y * pix->w * pix->n + 3];
+				int kk = pix->samples[x * pix->n + y * pix->w * pix->n + 4];
+				int r = 255 - MIN(cc + kk, 255);
+				int g = 255 - MIN(mm + kk, 255);
+				int b = 255 - MIN(yy + kk, 255);
+				fputc(a, alpha);
+				fputc(r, color);
+				fputc(g, color);
+				fputc(b, color);
+			}
+		}
+	}
+
+	else if (pix->n == 4)
+	{
+		fprintf(alpha, "P5\n%d %d\n255\n", pix->w, pix->h);
+		fprintf(color, "P6\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];
+				fputc(a, alpha);
+				fputc(r, color);
+				fputc(g, color);
+				fputc(b, color);
+			}
+		}
+	}
+
+	else if (pix->n == 2)
+	{
+		fprintf(alpha, "P5\n%d %d\n255\n", pix->w, pix->h);
+		fprintf(color, "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 g = pix->samples[x * pix->n + y * pix->w * pix->n + 1];
+				fputc(a, alpha);
+				fputc(g, color);
+			}
+		}
+	}
+
+	else if (pix->n == 1)
+	{
+		fprintf(alpha, "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 g = pix->samples[x * pix->n + y * pix->w * pix->n + 0];
+				fputc(g, alpha);
+			}
+		}
+	}
+
+cleanup:
+	if (alpha) fclose(alpha);
+	if (color) fclose(color);
+}
+