- missing file for webp

ext/gd/libgd/gd_webp.c

@@ -0,0 +1,202 @@
+#include <stdio.h>
+#include <math.h>
+#include <string.h>
+#include <stdlib.h>
+#include "gd.h"
+
+
+#ifdef HAVE_LIBVPX
+#include "webpimg.h"
+#include "gdhelpers.h"
+
+extern void gd_YUV420toRGBA(uint8* Y,
+                  uint8* U,
+                  uint8* V,
+                  gdImagePtr im);
+
+extern void gd_RGBAToYUV420(gdImagePtr im2,
+                  uint8* Y,
+                  uint8* U,
+                  uint8* V);
+
+const char * gdWebpGetVersionString()
+{
+	return "not defined";
+}
+
+gdImagePtr gdImageCreateFromWebp (FILE * inFile)
+{
+	gdImagePtr im;
+	gdIOCtx *in = gdNewFileCtx(inFile);
+	im = gdImageCreateFromWebpCtx(in);
+	in->gd_free(in);
+
+	return im;
+}
+
+gdImagePtr gdImageCreateFromWebpPtr (int size, void *data)
+{
+	int    width, height, ret;
+ 	unsigned char   *Y = NULL;
+	unsigned char   *U = NULL;
+	unsigned char   *V = NULL;
+	gdImagePtr im;
+
+	ret = WebPDecode(data, size, &Y, &U, &V, &width, &height);
+	if (ret != webp_success) {
+		if (Y) free(Y);
+		if (U) free(U);
+		if (V) free(V);
+		php_gd_error("WebP decode: fail to decode input data");
+		return NULL;
+	}
+	im = gdImageCreateTrueColor(width, height);
+	if (!im) {
+		return NULL;
+	}
+	gd_YUV420toRGBA(Y, U, V, im);
+	return im;
+}
+
+gdImagePtr gdImageCreateFromWebpCtx (gdIOCtx * infile)
+{
+	int    width, height, ret;
+	unsigned char   *filedata;
+	unsigned char   dummy[1024];
+	unsigned char   *Y = NULL;
+	unsigned char   *U = NULL;
+	unsigned char   *V = NULL;
+	size_t size = 0, n;
+	gdImagePtr im;
+
+	do {
+		n = gdGetBuf(dummy, 1024, infile);
+		printf("%i\n", n);
+		size += n;
+	} while (n != EOF);
+
+	filedata = gdMalloc(size);
+	if  (!filedata) {
+		php_gd_error("WebP decode: alloc failed");
+		return NULL;
+	}
+	gdGetBuf(filedata, size, infile);
+	ret = WebPDecode(filedata, size, &Y, &U, &V, &width, &height);
+	gdFree(filedata);
+	if (ret != webp_success) {
+		if (Y) free(Y);
+		if (U) free(U);
+		if (V) free(V);
+		php_gd_error("WebP decode: fail to decode input data");
+		return NULL;
+	}
+	im = gdImageCreateTrueColor(width, height);
+	gd_YUV420toRGBA(Y, U, V, im);
+	return im;
+}
+
+void gdImageWebpEx (gdImagePtr im, FILE * outFile, int quantization)
+{
+	gdIOCtx *out = gdNewFileCtx(outFile);
+	gdImageWebpCtx(im, out, quantization);
+	out->gd_free(out);
+}
+
+void gdImageWebp (gdImagePtr im, FILE * outFile)
+{
+	gdIOCtx *out = gdNewFileCtx(outFile);
+  	gdImageWebpCtx(im, out, -1);
+	out->gd_free(out);
+}
+
+void * gdImageWebpPtr (gdImagePtr im, int *size)
+{
+	void *rv;
+	gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
+	gdImageWebpCtx(im, out, -1);
+	rv = gdDPExtractData(out, size);
+	out->gd_free(out);
+
+	return rv;
+}
+
+void * gdImageWebpPtrEx (gdImagePtr im, int *size, int quantization)
+{
+	void *rv;
+	gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
+	gdImageWebpCtx(im, out, quantization);
+	rv = gdDPExtractData(out, size);
+	out->gd_free(out);
+	return rv;
+}
+
+/*
+ * Maps normalized QP (quality) to VP8 QP
+ */
+int mapQualityToVP8QP(int quality) {
+#define MIN_QUALITY 0
+#define MAX_QUALITY 100
+#define MIN_VP8QP 1
+#define MAX_VP8QP 63
+	const float scale = MAX_VP8QP - MIN_VP8QP;
+	const float vp8qp =
+	scale * (MAX_QUALITY - quality) / (MAX_QUALITY - MIN_QUALITY) + MIN_VP8QP;
+	if (quality < MIN_QUALITY || quality > MAX_QUALITY) {
+		php_gd_error("Wrong quality value %d.", quality);
+		return -1;
+	}
+
+	return (int)(vp8qp + 0.5);
+}
+
+/* This routine is based in part on code from Dale Lutz (Safe Software Inc.)
+ *  and in part on demo code from Chapter 15 of "PNG: The Definitive Guide"
+ *  (http://www.cdrom.com/pub/png/pngbook.html).
+ */
+void gdImageWebpCtx (gdImagePtr im, gdIOCtx * outfile, int quantization)
+{
+	int width = im->sx;
+	int height = im->sy;
+	int colors = im->colorsTotal;
+	int *open = im->open;
+
+	int  yuv_width, yuv_height, yuv_nbytes, ret;
+	int vp8_quality;
+	unsigned char *Y = NULL,
+				  *U = NULL,
+				  *V = NULL;
+	unsigned char *filedata = NULL;
+
+	/* Conversion to Y,U,V buffer */
+    yuv_width = (width + 1) >> 1;
+    yuv_height = (height + 1) >> 1;
+    yuv_nbytes = width * height + 2 * yuv_width * yuv_height;
+
+    if ((Y = (unsigned char *)gdCalloc(yuv_nbytes, sizeof(unsigned char))) == NULL) {
+    	php_gd_error("gd-webp error: cannot allocate Y buffer");
+        return;
+    }
+	vp8_quality = mapQualityToVP8QP(quantization);
+
+    U = Y + width * height;
+    V = U + yuv_width * yuv_height;
+    gd_RGBAToYUV420(im, Y, U, V);
+
+	/* Encode Y,U,V and write data to file */
+    ret = WebPEncode(Y, U, V, width, height, width, yuv_width, yuv_height, yuv_width,
+                     vp8_quality, &filedata, &yuv_nbytes, NULL);
+	gdFree(Y);
+
+    if (ret != webp_success) {
+    	if (filedata) {
+    		free(filedata);
+		}
+		php_gd_error("gd-webp error: WebP Encoder failed");
+		return;
+    }
+
+    gdPutBuf (filedata, yuv_nbytes, outfile);
+    free(filedata);
+}
+
+#endif /* HAVE_LIBVPX */