start adding write to array

First quick hack, untested.

See libvips/php-vips#90

Author: jcupitt

ChangeLog

@@ -1,5 +1,10 @@
 vips extension changelog
 
+Version 1.0.11 (2019-9-18)
+--------------------------
+	* Add vips_image_write_to_array() [jcupitt]
+	  https://github.com/libvips/php-vips/issues/90
+
 Version 1.0.10 (2018-12-xx)
 --------------------------
 	* Fix win32 build [TBK]

RELEASE-1.0.10 renamed to RELEASE-1.0.11

@@ -15,9 +15,9 @@ http://pear.php.net/dtd/package-2.0.xsd">
   <email>jcupitt@php.net</email>
   <active>yes</active>
  </lead>
- <date>2018-12-12</date>
+ <date>2019-9-19</date>
  <version>
-  <release>1.0.10</release>
+  <release>1.0.11</release>
   <api>1.0.0</api>
  </version>
  <stability>
@@ -26,16 +26,15 @@ http://pear.php.net/dtd/package-2.0.xsd">
  </stability>
  <license filesource="LICENSE.txt">MIT</license>
  <notes>
-	* Update links for new home [jcupitt]
-	* Fix win32 build [TBK]
+	* Add vips_image_write_to_array() [jcupitt]
  </notes>
  <contents>
   <dir name="/">
    <file role='doc' name='API-1.0.0'/>
    <file role='doc' name='CREDITS'/>
    <file role='doc' name='LICENSE.txt'/>
    <file role='doc' name='README.md'/>
-   <file role='doc' name='RELEASE-1.0.10'/>
+   <file role='doc' name='RELEASE-1.0.11'/>
    <file role='doc' name='ChangeLog'/>
 
    <file role='src' name='config.m4'/>
@@ -99,6 +98,15 @@ http://pear.php.net/dtd/package-2.0.xsd">
  </extsrcrelease>
  <changelog>
 
+  <release>
+   <stability><release>stable</release><api>stable</api></stability>
+   <version><release>1.0.11</release><api>1.0.0</api></version>
+   <date>2019-9-18</date>
+   <notes>
+	* Add vips_image_write_to_array() [jcupitt]
+   </notes>
+  </release>
+
   <release>
    <stability><release>stable</release><api>stable</api></stability>
    <version><release>1.0.10</release><api>1.0.0</api></version>

package.xml

@@ -1461,6 +1461,91 @@ PHP_FUNCTION(vips_image_write_to_memory)
 }
 /* }}} */
 
+#define ADD_ELEMENTS(TYPE, APPEND, N) { \
+	TYPE *p = arr; \
+	size_t i; \
+	\
+	for (i = 0; i < (N); i++) \
+		APPEND(return_value, p[i]); \
+}
+
+/* {{{ proto array vips_image_write_to_array(resource image)
+   Write an image to a PHP array. */
+PHP_FUNCTION(vips_image_write_to_array)
+{
+	zval *IM;
+	VipsImage *image;
+	size_t arr_len;
+	uint8_t *arr;
+	size_t n;
+
+	VIPS_DEBUG_MSG("vips_image_write_to_array:\n");
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "r", &IM) == FAILURE) {
+		RETURN_LONG(-1);
+	}
+
+	if ((image = (VipsImage *)zend_fetch_resource(Z_RES_P(IM),
+		"GObject", le_gobject)) == NULL) {
+		RETURN_LONG(-1);
+	}
+
+	if (!(arr = vips_image_write_to_memory(image, &arr_len))) {
+		RETURN_LONG(-1);
+	}
+
+	array_init(return_value);
+	n = arr_len / vips_format_sizeof(image->BandFmt);
+	g_assert(arr_len % vips_format_sizeof(image->BandFmt) == 0);
+	switch (image->BandFmt) {
+	case VIPS_FORMAT_UCHAR:
+		ADD_ELEMENTS (unsigned char, add_next_index_long, n);
+		break;
+
+	case VIPS_FORMAT_CHAR:
+		ADD_ELEMENTS (signed char, add_next_index_long, n);
+		break;
+
+	case VIPS_FORMAT_USHORT:
+		ADD_ELEMENTS (unsigned short, add_next_index_long, n);
+		break;
+
+	case VIPS_FORMAT_SHORT:
+		ADD_ELEMENTS (signed short, add_next_index_long, n);
+		break;
+
+	case VIPS_FORMAT_UINT:
+		ADD_ELEMENTS (unsigned int, add_next_index_long, n);
+		break;
+
+	case VIPS_FORMAT_INT:
+		ADD_ELEMENTS (signed int, add_next_index_long, n);
+		break;
+
+	case VIPS_FORMAT_FLOAT:
+		ADD_ELEMENTS (float, add_next_index_double, n);
+		break;
+
+	case VIPS_FORMAT_DOUBLE:
+		ADD_ELEMENTS (double, add_next_index_double, n);
+		break;
+
+	case VIPS_FORMAT_COMPLEX:
+		ADD_ELEMENTS (float, add_next_index_double, n * 2);
+		break;
+
+	case VIPS_FORMAT_DPCOMPLEX:
+		ADD_ELEMENTS (double, add_next_index_double, n * 2);
+		break;
+
+	default:
+		break;
+	}
+
+	g_free(arr);
+}
+/* }}} */
+
 /* {{{ proto string|long vips_foreign_find_load(string filename)
    Find a loader for a file */
 PHP_FUNCTION(vips_foreign_find_load)
@@ -2075,6 +2160,10 @@ ZEND_BEGIN_ARG_INFO(arginfo_vips_image_write_to_memory, 0)
 	ZEND_ARG_INFO(0, image)
 ZEND_END_ARG_INFO()
 
+ZEND_BEGIN_ARG_INFO(arginfo_vips_image_write_to_array, 0)
+	ZEND_ARG_INFO(0, image)
+ZEND_END_ARG_INFO()
+
 ZEND_BEGIN_ARG_INFO(arginfo_vips_foreign_find_load, 0)
 	ZEND_ARG_INFO(0, filename)
 ZEND_END_ARG_INFO()
@@ -2162,6 +2251,7 @@ const zend_function_entry vips_functions[] = {
 	PHP_FE(vips_image_copy_memory, arginfo_vips_image_copy_memory)
 	PHP_FE(vips_image_new_from_memory, arginfo_vips_image_new_from_memory)
 	PHP_FE(vips_image_write_to_memory, arginfo_vips_image_write_to_memory)
+	PHP_FE(vips_image_write_to_array, arginfo_vips_image_write_to_array)
 	PHP_FE(vips_foreign_find_load, arginfo_vips_foreign_find_load)
 	PHP_FE(vips_foreign_find_load_buffer, arginfo_vips_foreign_find_load_buffer)
 	PHP_FE(vips_interpolate_new, arginfo_vips_interpolate_new)