obs-studio/libobs/graphics/graphics-magick.c

#include "graphics.h"

#define MAGICKCORE_QUANTUM_DEPTH 16
#define MAGICKCORE_HDRI_ENABLE   0
#include <magick/MagickCore.h>

void gs_init_image_deps()
{
	MagickCoreGenesis(NULL, MagickTrue);
}

void gs_free_image_deps()
{
	MagickCoreTerminus();
}

uint8_t *gs_create_texture_file_data(const char *file,
		enum gs_color_format *format,
		uint32_t *cx_out, uint32_t *cy_out)
{
	uint8_t       *data = NULL;
	ImageInfo     *info;
	ExceptionInfo *exception;
	Image         *image;

	if (!file || !*file)
		return NULL;

	info      = CloneImageInfo(NULL);
	exception = AcquireExceptionInfo();

	strcpy(info->filename, file);
	image = ReadImage(info, exception);
	if (image) {
		size_t  cx    = image->magick_columns;
		size_t  cy    = image->magick_rows;
		data          = bmalloc(cx * cy * 4);

		ExportImagePixels(image, 0, 0, cx, cy, "BGRA", CharPixel,
				data, exception);
		if (exception->severity != UndefinedException) {
			blog(LOG_WARNING, "magickcore warning/error getting "
			                  "pixels from file '%s': %s", file,
			                  exception->reason);
			bfree(data);
			data = NULL;
		}

		*format = GS_BGRA;
		*cx_out = (uint32_t)cx;
		*cy_out = (uint32_t)cy;
		DestroyImage(image);

	} else if (exception->severity != UndefinedException) {
		blog(LOG_WARNING, "magickcore warning/error reading file "
		                  "'%s': %s", file, exception->reason);
	}

	DestroyImageInfo(info);
	DestroyExceptionInfo(exception);

	return data;
}